intiial review on: resolve_look_at__input_and_sub_proc

code/duffle/dsl.h

@@ -91,8 +91,8 @@
 #define PtrSet_(type)  TypeR_(type); typedef TypeV_(type)
 #define TSet_(type)    type; typedef PtrSet_(type)
 
-#define array_len(a)                   (U4)(sizeof(a) / sizeof(typeof((a)[0])))
-#define array_decl(type, ...)          (type[]){__VA_ARGS__}
+#define Array_len(a)                   (U4)(sizeof(a) / sizeof(typeof((a)[0])))
+#define Array_decl(type, ...)          (type[]){__VA_ARGS__}
 #define Array_sym(type,len)            A ## len ## _ ## type
 #define Array_expand(type,len)         type Array_sym(type, len)[len]; typedef PtrSet_(Array_sym(type, len))
 #define Array_(type,len)               Array_expand(type,len)

code/duffle/gen/macs.h

@@ -60,8 +60,8 @@ WORD_COUNT(mac_yield_tail, 3)
 
 /* atom_dbg_skip */
 #define mac_load_v2s2(rs_x, rs_y, r_base, offset) \
-	load_half( rs_x, r_base, O_(V3_S2,x)) \
-,	load_half( rs_y, r_base, O_(V3_S2,y))
+	load_half( rs_x, r_base, offset + O_(V3_S2,x)) \
+,	load_half( rs_y, r_base, offset + O_(V3_S2,y))
 WORD_COUNT(mac_load_v2s2, 2)
 
 /* atom_dbg_skip */
@@ -72,9 +72,9 @@ WORD_COUNT(mac_store_v2s2, 2)
 
 /* atom_dbg_skip */
 #define mac_load_v3s4(rs_x, rs_y, rs_z, r_base, offset) \
-	load_word( rs_x, r_base, O_(V3_S4,x)) \
-,	load_word( rs_y, r_base, O_(V3_S4,y)) \
-,	load_word( rs_z, r_base, O_(V3_S4,z))
+	load_word( rs_x, r_base, offset + O_(V3_S4,x)) \
+,	load_word( rs_y, r_base, offset + O_(V3_S4,y)) \
+,	load_word( rs_z, r_base, offset + O_(V3_S4,z))
 WORD_COUNT(mac_load_v3s4, 3)
 
 /* atom_dbg_skip */
@@ -175,71 +175,58 @@ WORD_COUNT(mac_gte_sqr_v3, 8)
 ,	shift_aright_var(r_dz, r_dz, r_shift)
 WORD_COUNT(mac_gte_gpf_scale, 13)
 
-#define mac_normalize_v3s4(...) \
-	load_word(r_src, R_TapePtr, O_(Binds_NormalizeV3S4,src))     /* pop src ptr (scratch addr) */ \
-,	load_word(r_dst, R_TapePtr, O_(Binds_NormalizeV3S4,dst))     /* pop dst ptr (scratch addr) */ \
-,	add_ui_self(   R_TapePtr, S_(Binds_NormalizeV3S4)) \
-,	load_word(r_sx, r_src, O_(V3_S4,x)) \
-,	load_word(r_sy, r_src, O_(V3_S4,y)) \
-,	load_word(r_sz, r_src, O_(V3_S4,z)) \
-,	nop /* load-delay */	/* ── 48-word normalize body (preserved verbatim from ac_normalize_v3s4) ─────── */	/* Stage 1: mtc2 src → IR1/2/3, SQR fires (MAC1/2/3 = IR², IR ← MAC saturated) */ \
-,	gte_mv_to_data_r(r_sx, C2_IR1) \
-,	gte_mv_to_data_r(r_sy, C2_IR2) \
-,	gte_mv_to_data_r(r_sz, C2_IR3) \
+#define mac_apply_matrix_lv(r_mtx, r_vec, r_out, r_t0, r_t1, r_t2) \
+	load_word(r_t0, r_mtx,  0) \
 ,	nop \
-,	gte_cmdw_sqr	/* Stage 2: mfc2 MAC1/2/3, sum, mtc2 LZCS */ \
-,	gte_mv_from_data_r(r_sq_y,      C2_MAC1) /* r_sq_y = MAC1 = sx² */ \
-,	gte_mv_from_data_r(r_sq_z,      C2_MAC2) /* r_sq_z = MAC2 = sy² */ \
-,	gte_mv_from_data_r(r_recip_est, C2_MAC3) /* r_recip_est = MAC3 = sz² */ \
-,	nop                                      /* MFC2→GPR load delay (1 slot) */ \
-,	add_u(r_recip_est, r_recip_est, r_sq_z)  /* r_recip_est += sy² */ \
-,	add_u(r_recip_est, r_recip_est, r_sq_y)  /* r_recip_est += sx² (sum = |v|²) */ \
-,	gte_mv_to_data_r(  r_recip_est, C2_LZCS) /* LZCS = |v|² */ \
-,	nop2 \
-,	gte_mv_from_data_r(r_lzcr, C2_LZCR)      /* r_lzcr = LZCR (count of leading bits) */ \
-,	nop                                      /* MFC2→GPR load delay (1 slot) */	/* Stage 3: compute shift amount, align |v|² to bit 24, lookup 1/|v| */ \
-,	and_i(         r_lzcr, r_lzcr, -2)       /* r_lzcr &= ~1 (force even for halving) */ \
-,	li_s(          r_shift, 31)              /* r_shift = 31 */ \
-,	sub_s(         r_shift, r_shift, r_lzcr) /* r_shift = 31 - LZCR */ \
-,	shift_aright(  r_shift, r_shift,  1)     /* r_shift = (31 - LZCR) / 2 */ \
-,	add_si(        r_tmp,   r_lzcr, -24)     /* r_tmp = LZCR - 24 (signed, for branch) */ \
-,	branch_lt_zero(r_tmp, atom_offset(srav_path, aligned_done)) \
+,	gte_mv_to_ctrl_r(r_t0, gte_cr_RT11_Code) \
+,	load_word(r_t0, r_mtx,  4) \
 ,	nop \
-,	jump_rel(             atom_offset(aligned_done, srav_path)) \
-,	shift_lleft_var(r_recip_est, r_recip_est, r_tmp)     /* BD-slot of branch_equal: r_recip_est = |v|² << (LZCR - 24) */ \
-,	atom_label(srav_path)                                 /* SRAV path: |v|² is small (top bit < bit 24) */ \
-,	li_s(          r_tmp, 24) \
-,	sub_s(         r_tmp, r_tmp, r_lzcr)                 /* r_tmp = 24 - LZCR */ \
-,	shift_aright_var(r_recip_est, r_recip_est, r_tmp)    /* r_recip_est = |v|² >> (24 - LZCR) */ \
-,	atom_label(aligned_done)                                /* Both paths converge here with |v|² aligned to bit 24 */	/* r_recip_est now holds |v|² aligned to bit 24 — convert to byte offset, -64 to skip zero pad. */ \
-,	add_si(        r_recip_est, r_recip_est, -64) \
-,	shift_lleft(   r_recip_est, r_recip_est, 1)           /* r_recip_est *= 2 (half-word index) */	/* Reference OUR local sqrtbl via &-address split. Compiler/linker resolves both halves. */ \
-,	load_upper_i(  r_tmp, u4_hi(& gte_normalize_sqr_tbl)) /* lui */ \
-,	or_i_self(     r_tmp, u4_lo(& gte_normalize_sqr_tbl)) /* ori */ \
-,	add_u(         r_tmp, r_tmp, r_recip_est)             /* r_tmp = sqrtbl base + byte offset (matches libgte 0x80016118: addu t5,t5,t4) */ \
-,	load_half(     r_recip_est, r_tmp, 0)                 /* r_recip_est = sqrtbl[r_recip_est] = 1/|v| estimate */ \
-,	nop                                                   /* retire load_half before MTC2 (matches libgte 0x80016120: nop) */	/* Stage 4: mtc2 IR0..3, GPF (MAC = IR0*IR), mfc2 MAC, srav finalize */ \
-,	gte_mv_to_data_r(r_recip_est, C2_IR0)  /* IR0 = 1/|v| estimate */ \
-,	gte_mv_to_data_r(r_sx,        C2_IR1)  /* IR1 = src.x */ \
-,	gte_mv_to_data_r(r_sy,        C2_IR2)  /* IR2 = src.y */ \
-,	gte_mv_to_data_r(r_sz,        C2_IR3)  /* IR3 = src.z */ \
-,	nop2                                   /* COP2 transfer latency (2 slots) */ \
-,	gte_cmdw_gpf \
-,	gte_mv_from_data_r(r_sx, C2_MAC1)      /* MAC1 → r_sx (overwrites src.x with raw reciprocal-scaled) */ \
-,	gte_mv_from_data_r(r_sy, C2_MAC2) \
-,	gte_mv_from_data_r(r_sz, C2_MAC3) \
-,	shift_aright_var(r_sx, r_sx, r_shift) \
-,	shift_aright_var(r_sy, r_sy, r_shift) \
-,	shift_aright_var(r_sz, r_sz, r_shift)	/* ── I/O wrapper tail (~3 words) ───────────────────────────────────────────── */ \
-,	store_word(r_sx, r_dst, O_(V3_S4,x)) \
-,	store_word(r_sy, r_dst, O_(V3_S4,y)) \
-,	store_word(r_sz, r_dst, O_(V3_S4,z))	/* ── atom_reads(R_TapePtr) atom_writes(R_TapePtr) ────────────────────────── */ \
-,	mac_yield()
-WORD_COUNT(mac_normalize_v3s4, 62)
+,	gte_mv_to_ctrl_r(r_t0, gte_cr_RT12_Code) \
+,	load_word(r_t0, r_mtx,  8) \
+,	nop \
+,	gte_mv_to_ctrl_r(r_t0, gte_cr_RT13_Code) \
+,	load_word(r_t0, r_mtx, 12) \
+,	nop \
+,	gte_mv_to_ctrl_r(r_t0, gte_cr_RT21_Code) \
+,	load_half_u(r_t0, r_mtx, 16) \
+,	nop \
+,	gte_mv_to_ctrl_r(r_t0, gte_cr_RT22_Code) \
+,	nop2	/* Load PACKED pos into V0 (libgte SVECTOR layout).
+	 * r_vec points to atom-0-staged packed data ((pos.y << 16) | pos.x at +0, pos.z at +4).
+	 * LWC2 base register MUST be the pointer r_vec, NOT the loaded value r_t0. */ \
+,	load_word(r_t0, r_vec, 0) \
+,	nop \
+,	gte_lw(C2_VXY0, r_vec, 0) \
+,	load_word(r_t0, r_vec, 4) \
+,	nop \
+,	gte_lw(C2_VZ0, r_vec, 4)	/* RTPS: cv=3 (no translation), sf=1 (no shift, integer), v=0 (V0 input),
+	 * mx=0 (rotation matrix). MAC = RT row · V0 + 0. RTPS also writes
+	 * SXY0/1/2 + SZ0..SZ3 (perspective division); ignored. */ \
+,	gte_cmdw_rtps_sf1	/* Read MAC1/2/3 → out. */ \
+,	gte_mv_from_data_r(r_t0, C2_MAC1) \
+,	gte_mv_from_data_r(r_t1, C2_MAC2) \
+,	gte_mv_from_data_r(r_t2, C2_MAC3) \
+,	nop \
+,	store_word(r_t0, r_out, 0) \
+,	store_word(r_t1, r_out, 4) \
+,	store_word(r_t2, r_out, 8)
+WORD_COUNT(mac_apply_matrix_lv, 31)
+
+#define mac_trans_matrix(r_mtx, r_off, r_t1) \
+	load_word(r_t1, r_off, O_(V3_S4,x)) \
+,	nop \
+,	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[0])) \
+,	load_word(r_t1, r_off, O_(V3_S4,y)) \
+,	nop \
+,	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[1])) \
+,	load_word(r_t1, r_off, O_(V3_S4,z)) \
+,	nop \
+,	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[2]))
+WORD_COUNT(mac_trans_matrix, 9)
 
 #define mac_gcmd_push(cmd, reg_transfer, reg_base, port) \
-	load_upper_i(reg_transfer, cmd >> 16) \
-,	or_i_self(   reg_transfer, cmd & 0xFFFF) \
+	load_upper_i(reg_transfer, u4_hi(cmd)) \
+,	or_i_self(   reg_transfer, u4_lo(cmd))	/* load_upper_i(reg_transfer, cmd >> 16),	// or_i_self(   reg_transfer, cmd & 0xFFFF), */ \
 ,	store_word(  reg_transfer, reg_base, port)
 WORD_COUNT(mac_gcmd_push, 3)
 

code/duffle/gen/offsets.h

@@ -25,14 +25,14 @@
 #pragma region duffle
 
 
-// --- atom: normalize_v3s4 (62 words) ---
+// --- atom: normalize_v3s4 (66 words) ---
 
-#define _atom_offset_srav_path_aligned_done           6
-#define _atom_offset_aligned_done_srav_path           1
+#define _atom_offset_aligned_done_srav_path           3
+#define _atom_offset_srav_path_aligned_done           4
 
 enum {
-    atom_offset_srav_path_aligned_done = _atom_offset_srav_path_aligned_done,
     atom_offset_aligned_done_srav_path = _atom_offset_aligned_done_srav_path,
+    atom_offset_srav_path_aligned_done = _atom_offset_srav_path_aligned_done,
 };
 
 // --- atom: pad_bios_snapshot (84 words) ---

code/duffle/gp.atom.c

@@ -8,30 +8,32 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(gp_atom_c);
 
 #pragma region MACs (Mips Atom Components)
 
-FI_ Slice_MipsCode ac_gcmd_push(MipsAtomBuilder_R ab, U4 cmd, U4 reg_transfer, U4 reg_base, U2 port)
+FI_ Slice_MipsCode ac_gcmd_push(AtomBuilder_R ab, U4 cmd, U4 reg_transfer, U4 reg_base, U2 port)
 MipsAtomComp_Proc_(ac_gcmd_push, ab, {
-	load_upper_i(reg_transfer, cmd >> 16),
-	or_i_self(   reg_transfer, cmd & 0xFFFF),
+	load_upper_i(reg_transfer, u4_hi(cmd)),
+	or_i_self(   reg_transfer, u4_lo(cmd)),
+	// load_upper_i(reg_transfer, cmd >> 16),
+	// or_i_self(   reg_transfer, cmd & 0xFFFF),
 	store_word(  reg_transfer, reg_base, port),
 })
 
-FI_ Slice_MipsCode ac_store_rgb8(MipsAtomBuilder_R ab, U1 rr, U1 rg, U1 rb, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_rgb8, ab, {
+FI_ Slice_MipsCode ac_store_rgb8(AtomBuilder_R ab, U1 rr, U1 rg, U1 rb, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_rgb8, ab, {
 	store_byte(rr, base, offset + O_(RGB8,r)),
 	store_byte(rg, base, offset + O_(RGB8,g)),
 	store_byte(rb, base, offset + O_(RGB8,b)),
 })
 
-FI_ Slice_MipsCode ac_pack_color_word(MipsAtomBuilder_R ab, U4 r_base, U4 off, U4 cmd, U1 r, U1 g, U1 b)
+FI_ Slice_MipsCode ac_pack_color_word(AtomBuilder_R ab, U4 r_base, U4 off, U4 cmd, U1 r, U1 g, U1 b)
 atom_dbg_skip MipsAtomComp_Proc_(ac_pack_color_word, ab, {
 	load_upper_i(R_AT, (cmd) << 8  | (b)),
 	or_i_self(   R_AT, ((g)  << 8) | (r)),
 	store_word(  R_AT, r_base, (off)),
 })
 
-FI_ Slice_MipsCode ac_format_f3_color(MipsAtomBuilder_R ab, U4 r_base, U1 r, U1 g, U1 b)
+FI_ Slice_MipsCode ac_format_f3_color(AtomBuilder_R ab, U4 r_base, U1 r, U1 g, U1 b)
 atom_dbg_skip MipsAtomComp_Proc_(ac_format_f3_color, ab, { mac_pack_color_word(r_base, O_(Poly_F3,color), gp0_cmd_poly_f3, r, g, b) })
 
-FI_ Slice_MipsCode ac_format_g4_color(MipsAtomBuilder_R ab, U4 r_prim_cursor,
+FI_ Slice_MipsCode ac_format_g4_color(AtomBuilder_R ab, U4 r_prim_cursor,
 	U1 r0, U1 g0, U1 b0,
   U1 r1, U1 g1, U1 b1,
   U1 r2, U1 g2, U1 b2,
@@ -44,7 +46,7 @@ MipsAtomComp_Proc_(ac_format_g4_color, ab, {
 })
 
 /* Words: 11; Correctly inserts a primitive into the Ordering Table linked list. */
-I_ Slice_MipsCode ac_insert_ot_tag(MipsAtomBuilder_R ab, U4 r_ot_base, U4 r_prim_cursor, U4 poly_size) MipsAtomComp_Proc_(ac_insert_ot_tag, ab, {
+I_ Slice_MipsCode ac_insert_ot_tag(AtomBuilder_R ab, U4 r_ot_base, U4 r_prim_cursor, U4 poly_size) MipsAtomComp_Proc_(ac_insert_ot_tag, ab, {
 	shift_lleft( R_T1, R_T1, S_(U4)/2),                        // T1 = otz * S_(U4) (otz arg is implicit R_T1)
 	add_u_self(  R_T1, r_ot_base),                             // T1 = & OrderingTable[OTZ]
 	load_word(   R_AT, R_T1,          O_(PolyTag,code)),       // AT = old_ot_head

code/duffle/gte.atom.c

@@ -11,7 +11,7 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(gte_atom_c);
 #pragma region MACs (Mips Atom Components)
 
 /* Words: 3; Loads 3 S2 indices from the face array */
-FI_ Slice_MipsCode ac_load_tri_indices(MipsAtomBuilder_R ab, U4 r_face_cusor, U4 r_i0, U4 r_i1, U4 r_i2) atom_dbg_skip MipsAtomComp_Proc_(ac_load_tri_indices, ab, {
+FI_ Slice_MipsCode ac_load_tri_indices(AtomBuilder_R ab, U4 r_face_cusor, U4 r_i0, U4 r_i1, U4 r_i2) atom_dbg_skip MipsAtomComp_Proc_(ac_load_tri_indices, ab, {
 	load_half_u(r_i0, r_face_cusor, 0 * S_(S2)),
 	load_half_u(r_i1, r_face_cusor, 1 * S_(S2)),
 	load_half_u(r_i2, r_face_cusor, 2 * S_(S2)),
@@ -19,14 +19,14 @@ FI_ Slice_MipsCode ac_load_tri_indices(MipsAtomBuilder_R ab, U4 r_face_cusor, U4
 
 /* Words: 3; Stores the 3 transformed (V2_S2 screen) vertices to the F3.
  * PIPELINE: post-RTPT (SXY0=v0.screen, SXY1=v1.screen, SXY2=v2.screen). */
-FI_ Slice_MipsCode ac_gte_store_f3(MipsAtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_f3, ab, {
+FI_ Slice_MipsCode ac_gte_store_f3(AtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_f3, ab, {
 	gte_sw(C2_SXY0, r_primitive_cursor, O_(Poly_F3,p0)),
 	gte_sw(C2_SXY1, r_primitive_cursor, O_(Poly_F3,p1)),
 	gte_sw(C2_SXY2, r_primitive_cursor, O_(Poly_F3,p2)),
 })
 
 /* Words: 18; Translates indices to vertex addresses and pushes them to GTE  */
-I_ Slice_MipsCode ac_gte_load_tri_verts(MipsAtomBuilder_R ab, U4 r_vert_base, U4 r_v0, U4 r_v1, U4 r_v2) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_load_tri_verts, ab, {
+I_ Slice_MipsCode ac_gte_load_tri_verts(AtomBuilder_R ab, U4 r_vert_base, U4 r_v0, U4 r_v1, U4 r_v2) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_load_tri_verts, ab, {
 	shift_lleft(R_AT, r_v0, v3s2_byteoff), add_u_self(R_AT, r_vert_base), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), gte_mv_to_data_r(R_V0, C2_VXY0), gte_mv_to_data_r(R_V1, C2_VZ0),
 	shift_lleft(R_AT, r_v1, v3s2_byteoff), add_u_self(R_AT, r_vert_base), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), gte_mv_to_data_r(R_V0, C2_VXY1), gte_mv_to_data_r(R_V1, C2_VZ1),
 	shift_lleft(R_AT, r_v2, v3s2_byteoff), add_u_self(R_AT, r_vert_base), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), gte_mv_to_data_r(R_V0, C2_VXY2), gte_mv_to_data_r(R_V1, C2_VZ2),
@@ -37,7 +37,7 @@ I_ Slice_MipsCode ac_gte_load_tri_verts(MipsAtomBuilder_R ab, U4 r_vert_base, U4
  * PIPELINE: post-RTPT, pre-RTPS (SXY0=v0.screen, SXY1=v1.screen, SXY2=v2.screen).
  * MUST be called BEFORE V3-RTPS, otherwise SXY0/1/2 get overwritten with v3
  * (RTPS writes only to SXY2, but to keep the three registers aligned with v0/v1/v2 you must store before RTPS). */
-FI_ Slice_MipsCode ac_gte_store_g4_p012(MipsAtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_g4_p012, ab, {
+FI_ Slice_MipsCode ac_gte_store_g4_p012(AtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_g4_p012, ab, {
 	gte_sw(C2_SXY0, r_primitive_cursor, O_(Poly_G4,p0)),
 	gte_sw(C2_SXY1, r_primitive_cursor, O_(Poly_G4,p1)),
 	gte_sw(C2_SXY2, r_primitive_cursor, O_(Poly_G4,p2)),
@@ -47,13 +47,13 @@ FI_ Slice_MipsCode ac_gte_store_g4_p012(MipsAtomBuilder_R ab, U4 r_primitive_cur
  * PIPELINE: post-RTPS (SXY2 holds v3.screen because RTPS writes its single-vertex result to SXY2;
  * SXY0 still holds v0.screen from the earlier RTPT.
  */
-FI_ Slice_MipsCode ac_gte_store_g4_p3(MipsAtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_g4_p3, ab, { gte_sw(C2_SXY2, r_primitive_cursor, O_(Poly_G4,p3)) })
+FI_ Slice_MipsCode ac_gte_store_g4_p3(AtomBuilder_R ab, U4 r_primitive_cursor) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_store_g4_p3, ab, { gte_sw(C2_SXY2, r_primitive_cursor, O_(Poly_G4,p3)) })
 
 /* ─── STAGE 1 of normalize: SQR + mfc2 MAC1/2/3 ───
  * Emits squared magnitude per component (in MAC1/2/3) into caller-provided scratch regs.
  * Stage 2 of normalize consumes these directly.
  * Words: 8.  Clobbers: IR1/2/3, MAC1/2/3.  Uses gte_cmdw_sqr (sf=0, lm=1). */
-FI_ Slice_MipsCode ac_gte_sqr_v3(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r_sz, U4 r_sq_x, U4 r_sq_y, U4 r_sq_z) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_sqr_v3, ab, {
+FI_ Slice_MipsCode ac_gte_sqr_v3(AtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r_sz, U4 r_sq_x, U4 r_sq_y, U4 r_sq_z) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_sqr_v3, ab, {
 	gte_mv_to_data_r(r_sx, C2_IR1),
 	gte_mv_to_data_r(r_sy, C2_IR2),
 	gte_mv_to_data_r(r_sz, C2_IR3),
@@ -68,7 +68,7 @@ FI_ Slice_MipsCode ac_gte_sqr_v3(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r_sz
  * (typically (31 - LZCR)/2), multiplies IR0*IR[i] via GPF and shifts right to produce the normalized output.
  * Used standalone for "scale vector by scalar".
  * Words: 11.  Clobbers: IR0..3, MAC1..3.  Uses gte_cmdw_gpf (sf=0, lm=0). */
-FI_ Slice_MipsCode ac_gte_gpf_scale(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r_sz, U4 r_recip_est, U4 r_shift, U4 r_dx, U4 r_dy, U4 r_dz) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_gpf_scale, ab, {
+FI_ Slice_MipsCode ac_gte_gpf_scale(AtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r_sz, U4 r_recip_est, U4 r_shift, U4 r_dx, U4 r_dy, U4 r_dz) atom_dbg_skip MipsAtomComp_Proc_(ac_gte_gpf_scale, ab, {
 	gte_mv_to_data_r(r_recip_est, C2_IR0),
 	gte_mv_to_data_r(r_sx,        C2_IR1),
 	gte_mv_to_data_r(r_sy,        C2_IR2),
@@ -83,6 +83,90 @@ FI_ Slice_MipsCode ac_gte_gpf_scale(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r
 	shift_aright_var(r_dz, r_dz, r_shift),
 })
 
+/* ─── APPLY MATRIX LV (libgte ApplyMatrixLV port) ───
+ * Atom component — auto-generates mac_apply_matrix_lv Mac composer macro.
+ * Uses GTE RTPS (cv=1, sf=1, v=0) with lwc2-loaded V0/VZ0 inputs.
+ * Per PSX-SPX `geometrytransformationenginegte.md` lines 416-418:
+ *   IR1 = MAC1 = (TRX*1000h + RT11*VX0 + RT12*VY0 + RT13*VZ0) SAR (sf*12)
+ *   IR2 = MAC2 = (TRY*1000h + RT21*VX0 + RT22*VY0 + RT23*VZ0) SAR (sf*12)
+ *   IR3 = MAC3 = (TRZ*1000h + RT31*VX0 + RT32*VY0 + RT33*VZ0) SAR (sf*12)
+ * RTPS uses the FULL row of the rotation matrix (not just diagonal like MVMVA with mx=0).
+ * libgte's `gte_ApplyMatrix` calls `gte_rtv0()` = RTPS cv=1 v=0 mx=0.
+ * Per `gte.h` line 405 the body sets cv=3 (BK, zero-initialized) so no TR contribution.
+ *
+ * Operands:
+ *   r_mtx  : MT3_S2S4* (matrix pointer)
+ *   r_vec  : U4 (pointer to PACKED V0 data — (pos.y << 16) | pos.x at +0, pos.z at +4)
+ *   r_out  : V3_S4* (output pointer; MAC1/2/3 stored here)
+ *   r_t0/1/2 : 3 GPR codes for matrix load + intermediate state
+ * Words: ~26.  Clobbers: r_t0, r_t1, r_t2 (C2 $0..$4, VXY0/VZ0, MAC1/2/3, SXY0/1/2). */
+FI_ Slice_MipsCode ac_apply_matrix_lv(AtomBuilder_R ab
+	,	U4 r_mtx, U4 r_vec, U4 r_out
+	,	U4 r_t0,  U4 r_t1,  U4 r_t2
+) MipsAtomComp_Proc_(ac_apply_matrix_lv, ab, {
+	/* Load MATRIX rows into GTE RT11..RT33 (libgte convention: ctc2 to C2 $0..$4 in order).
+	 * load_half_u zero-extends the last word so RT33 = m[2][2] and TRX = 0. */
+	load_word(r_t0, r_mtx,  0), nop,
+	gte_mv_to_ctrl_r(r_t0, gte_cr_RT11_Code),
+	load_word(r_t0, r_mtx,  4), nop,
+	gte_mv_to_ctrl_r(r_t0, gte_cr_RT12_Code),
+	load_word(r_t0, r_mtx,  8), nop,
+	gte_mv_to_ctrl_r(r_t0, gte_cr_RT13_Code),
+	load_word(r_t0, r_mtx, 12), nop,
+	gte_mv_to_ctrl_r(r_t0, gte_cr_RT21_Code),
+	load_half_u(r_t0, r_mtx, 16), nop,
+	gte_mv_to_ctrl_r(r_t0, gte_cr_RT22_Code),
+	nop2,
+
+	/* Load PACKED pos into V0 (libgte SVECTOR layout).
+	 * r_vec points to atom-0-staged packed data ((pos.y << 16) | pos.x at +0, pos.z at +4).
+	 * LWC2 base register MUST be the pointer r_vec, NOT the loaded value r_t0. */
+	load_word(r_t0, r_vec, 0), nop,
+	gte_lw(C2_VXY0, r_vec, 0),
+	load_word(r_t0, r_vec, 4), nop,
+	gte_lw(C2_VZ0, r_vec, 4),
+
+	/* RTPS: cv=3 (no translation), sf=1 (no shift, integer), v=0 (V0 input),
+	 * mx=0 (rotation matrix). MAC = RT row · V0 + 0. RTPS also writes
+	 * SXY0/1/2 + SZ0..SZ3 (perspective division); ignored. */
+	gte_cmdw_rtps_sf1,
+
+	/* Read MAC1/2/3 → out. */
+	gte_mv_from_data_r(r_t0, C2_MAC1),
+	gte_mv_from_data_r(r_t1, C2_MAC2),
+	gte_mv_from_data_r(r_t2, C2_MAC3),
+	nop,
+	store_word(r_t0, r_out, 0),
+	store_word(r_t1, r_out, 4),
+	store_word(r_t2, r_out, 8),
+})
+
+/* ─── TRANS MATRIX (libgte TransMatrix port) ───
+ * Atom component — auto-generates mac_trans_matrix Mac composer macro.
+ * m->t = v (struct copy; libgte's TransMatrix at 0x8001a540 is just 3 store_words, no GTE, no add).
+ * Uses 1 GPR (r_t1 = off value) per axis; per-axis load-delay-slot pattern.
+ * Words: 9.  Clobbers: r_t1. */
+FI_ Slice_MipsCode ac_trans_matrix(AtomBuilder_R ab
+	,	U4 r_mtx, U4 r_off
+	,	U4 r_t1
+) MipsAtomComp_Proc_(ac_trans_matrix, ab, {
+	load_word(r_t1, r_off, O_(V3_S4,x)),
+	nop,
+	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[0])),
+
+	load_word(r_t1, r_off, O_(V3_S4,y)),
+	nop,
+	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[1])),
+
+	load_word(r_t1, r_off, O_(V3_S4,z)),
+	nop,
+	store_word(r_t1, r_mtx, O_(MT3_S2S4,t[2])),
+})
+
+#pragma endregion MACs (Mips Atom Components)
+
+#pragma region Atom Procs
+
 /* ─── Local copy of PSYQ's sqrtbl (1/sqrt lookup table for VectorNormal). ───
  * Source: PSYQ 4.7 libgte sqrtbl at 0x800185B4 in hello_camera.elf.
  *   objdump -s --start-address=0x800185B4 --stop-address=0x800185F4 hello_camera.elf
@@ -97,7 +181,8 @@ FI_ Slice_MipsCode ac_gte_gpf_scale(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r
  *   Octave 1 (entries 48- 95): mantissa in [0x10000, 0x20000)  output ~[0.707, 0.500]
  *   Octave 2 (entries 96-143): mantissa in [0x20000, 0x40000)  output ~[0.500, 0.354]
  *   Octave 3 (entries144-191): mantissa in [0x40000, 0x80000)  output ~[0.354, 0.251]
- * Within each octave, 8 sub-entries interpolate over the 8 fractional bits of the mantissa (the byte `(0x80 | (i mod 8))` for the lower-byte of the aligned value).
+ * Within each octave, 8 sub-entries interpolate over the 8 fractional bits of the mantissa
+ * (the byte `(0x80 | (i mod 8))` for the lower-byte of the aligned value).
  * Sampling the first value of each octave:
  *   [0]   0x1000 = 1.0000                 ; 1 / sqrt(1.0000)
  *   [48]  0x0e4f = 0.8940                 ; 1 / sqrt(1.2500)
@@ -121,7 +206,7 @@ FI_ Slice_MipsCode ac_gte_gpf_scale(MipsAtomBuilder_R ab, U4 r_sx, U4 r_sy, U4 r
  * The later 64 entries (octaves 2-3) are the `srav` branch when the magnitude's top bit is well above bit 24.
  *
  * 192-entry table is reproduced verbatim from libgte (verified against libpsn00b/psxgte/vector.s:100-123 — 24 rows × 8 halfwords, last entry 0x0804). */
-internal S2 const gte_normalize_sqr_tbl[192] align_(2) = {
+internal RO_ S2  gte_normalize_sqr_tbl[192] align_(2) = {
 	0x1000, 0x0fe0, 0x0fc1, 0x0fa3, 0x0f85, 0x0f68, 0x0f4c, 0x0f30,
 	0x0f15, 0x0efb, 0x0ee1, 0x0ec7, 0x0eae, 0x0e96, 0x0e7e, 0x0e66,
 	0x0e4f, 0x0e38, 0x0e22, 0x0e0c, 0x0df7, 0x0de2, 0x0dcd, 0x0db9,
@@ -149,131 +234,132 @@ internal S2 const gte_normalize_sqr_tbl[192] align_(2) = {
 };
 
 /* ─── Full normalize (all 4 stages inline) ───
+ * Generic 4-stage GTE normalize (SQR → sum+LZCR → align+sqrtbl → GPF+srav).
+ *
+ * Parameterized by caller-provided scratch base + src/dst offsets.
+ * The caller passes r_src_offset and r_dst_offset as compile-time constants
+ * (typically derived from O_ macros in the caller's struct schema, e.g., `O_(CallerBundleScratch, fwd)`).
+ *
+ * This design lets any caller (with a scratch base + struct schema) use `normalize_v3s4_proc` 
+ * without putting magic offsets in the C-side bundle helper — the offsets come from O_ macros at the call site.
+ *
+ * Body uses 9 GPRs (r_src_ptr..r_branch_tmp):
+ *   r_src_ptr, r_dst_ptr : src/dst pointers (computed from r_scratch + caller offsets)
+ *   r_tmp                : src.x PRESERVED across stages 1-2 (NOT clobbered by mfc2 MAC2) → fed to IR1 in stage 4
+ *   r_mac1_scratch       : MAC1 result scratch (also holds aligned |v|² in stage 3)
+ *   r_mac2_scratch       : MAC2 result scratch → result.x after stage 4 sra
+ *   r_recip_est          : src.y PRESERVED across stages 1-2 → fed to IR2 in stage 4 → result.y
+ *   r_lzcr               : |v|² sum (stage 2) → shift count (stage 3) → 1/|v| (stage 4 IR0)
+ *   r_shift              : shift count SAVED in stage 3 → consumed by stage 4 srav
+ *   r_branch_tmp         : src.z PRESERVED across stages 1-2 → fed to IR3 in stage 4 → result.z (also sqrtbl base addr)
+ *
+ * Atom_labels are srav_path / aligned_done 
+ * (NOT namespaced — they're internal to this proc; 
+ * the metaprogram's per-atom-name enum emission handles any collision across different atoms/files that share the same labels).
+ *
+ * Pool cost: 11 GPRs (well within the 9-10 caller-trash GPR budget when r_scratch is a wave-context carrier).
+ *
  * Direct port of PSYQ libgte msc02.rel.text VectorNormal disassembly (0x800160a0..0x8001615c).
- *
- * Component variants that could apply:
- *   - `ac_gte_sqr_v3` (line ~56) covers stage 1's `mtc2 IR1/2/3 + nop + gte_cmdw_sqr`.
- *     We do NOT call it because the inlined version of stage 1 is followed immediately by stage 2's `mfc2 MAC1/2/3` chain 
- *     (the operands of `ac_gte_sqr_v3`'s r_sq_x/r_sq_y/r_sq_z would each require an explicit GPR to receive the MAC result,
- *      then a move to land in r_recip_est for the partial-sum chain).
- *     Inlining saves ~3 cycles of `or`-merge + register pressure
- *     (squared MAC3 lands DIRECTLY in r_recip_est which doubles as the partial-sum accumulator and the LZCS input — see r_recip_est row below).
- *   - `ac_gte_gpf_scale` (line ~71) covers stage 4's `mtc2 IR0..3 + nop2 + gte_cmdw_gpf + mfc2 MAC1/2/3 + sra`.
- *     We do NOT call it for the symmetric reason: the normalize in-place semantics overwrite the input regs (r_sx/r_sy/r_sz) with the normalized output,
- *     which `ac_gte_gpf_scale`'s r_dx/r_dy/r_dz output GPRs would not match.
- *   `gte_cmdw_sqr` and `gte_cmdw_gpf` primitive macros ARE used in the inlined body, so changes to those primitives
- *   (e.g., the libgte `fake_cmd` signature bits) propagate automatically. The components remain available for callers that want the explicit GPR-shape variants.
- *
- * Argument aliasing (9 unique physical regs needed, can drop to 8 with r_sq_y ≡ r_lzcr):
- *   r_sx, r_sy, r_sz        : src components in regs (clobbered by mtc2 → IR1/2/3 in stage 1, then by mfc2 MAC1/2/3 in stage 4 — in-place semantics)
- *   r_sq_y, r_sq_z          : MAC2, MAC3 → DIE after stage 2 accumulate (r_sq_y can alias r_lzcr after stage 2 to save one reg)
- *   r_recip_est             : ≡ r_sqmag — multi-purpose (holds |v|² in stage 2, shift-input in stage 3, sqrtbl[index] in stage 4)
- *   r_lzcr                  : LZCR value, alive across stage 3 (srav path needs `24 - LZCR`)
- *   r_shift                 : (31 - LZCR & ~1) >> 1 — final srav amount (stages 3-4)
- *   r_tmp                   : scratch (shift count, branch target, lookup addr, table base)
- *
- * GPR ccount peak: 9.
+ * Words: ~59 (matches libgte 0x800160a0..0x8001615c at +/- 0-2 words for BD-slot reshuffling).
+ * Sqrtbl: hardcoded to 0x800185B4 (libgte msc02.rel.data). Note: swapped to local.
  * Pipeline: clobbers IR0..3, MAC1..3, LZCS, LZCR.
- * Words: ~35 (pending re-gen; matches libgte 0x800160a0..0x8001615c at +/- 0-2 words for BD-slot reshuffling).
- * Sqrtbl: hardcoded to 0x800185B4 (libgte msc02.rel.data). Note: swapped to local. */
-
-/* ─── Binds_NormalizeV3S4 — declared here so the MipsAtom_Proc_ body can reference
- * O_(Binds_NormalizeV3S4,*). Inlined at the proc-call site; not exposed in gen/macs.h. */
-typedef Struct_(Binds_NormalizeV3S4) {
-	U4 src;  /* V3_S4* (scratch address — read from tape) */
-	U4 dst;  /* V3_S4* (scratch address — write to tape) */
-};
-
-/* NOTE: The bundle-specific scratchpad offset schema was intentionally kept out of this file.
- * gte.atom.c is the GENERIC GTE primitives file — it exposes only the parameter-style normalize_v3s4_proc for any future caller. */
-I_ void normalize_v3s4_proc(
-		MipsAtomBuilder_R ab
-	,	U4 r_src              /* GPR code: scratch base carrier (wave-context, e.g., R_T4) */
-	,	U4 r_dst              /* GPR code: scratch dst pointer carrier (wave-context, e.g., R_T5) */
-	,	U4 r_sx, U4 r_sy, U4 r_sz              /* GPR codes: src.x/y/z scratch (atom-local) */
-	,	U4 r_sq_y, U4 r_sq_z                   /* GPR codes: MAC1/2 scratch (atom-local) */
-	,	U4 r_recip_est                         /* GPR code: |v|² sum + shift-input + sqrtbl[index] (atom-local) */
-	,	U4 r_lzcr                              /* GPR code: LZCR value (atom-local) */
-	,	U4 r_shift                             /* GPR code: final srav amount (atom-local) */
-	,	U4 r_tmp                               /* GPR code: scratch (shift count, branch target, lookup addr, table base) */
-)
+ */
 /* MipsAtom_Proc_ wrapper: declares the static MipsCode[] body, then calls atombuilder_unroll(ab, ...) to copy the encoded instructions into the caller's MipsAtomBuilder arena.  */
-MipsAtom_Proc_(normalize_v3s4, ab, {
-	/* ── I/O wrapper (~10 words: 3 bind-pop + 3 src-load + 1 nop + 3 dst-store) ─── */
-	load_word(r_src, R_TapePtr, O_(Binds_NormalizeV3S4,src)),     /* pop src ptr (scratch addr) */
-	load_word(r_dst, R_TapePtr, O_(Binds_NormalizeV3S4,dst)),     /* pop dst ptr (scratch addr) */
-	add_ui_self(   R_TapePtr, S_(Binds_NormalizeV3S4)),
-	load_word(r_sx, r_src, O_(V3_S4,x)),
-	load_word(r_sy, r_src, O_(V3_S4,y)),
-	load_word(r_sz, r_src, O_(V3_S4,z)),
+internal MipsAtom* normalize_v3s4_proc(AtomArena_R aa,	U4 r_scratch /* GPR code: scratch base carrier (e.g., R_T4 = R_ResolveScratch) */
+	,	U4 r_src_offset, U4 r_dst_offset     /* GPR codes: PARAMETERIZED offsets (caller passes O_ macros) */
+	,	U4 r_src_ptr, U4 r_dst_ptr, U4 r_tmp /* GPR codes: 3 scratch regs (src/dst computed + tmp) */
+	,	U4 r_mac1_scratch, U4 r_mac2_scratch /* GPR codes: 2 more: MAC1/MAC2 scratch */
+	,	U4 r_recip_est                       /* GPR code: |v|² sum + shift-input + sqrtbl[index] */
+	,	U4 r_lzcr, U4 r_shift                /* GPR codes: lzcr + final srav amount */
+	,	U4 r_branch_tmp                      /* GPR code: scratch (shift count, branch target, lookup addr) */
+)
+MipsAtom_Proc_(normalize_v3s4, aa, {
+	add_si(r_src_ptr, r_scratch, r_src_offset),     /* r_src_ptr = &src */
+	add_si(r_dst_ptr, r_scratch, r_dst_offset),     /* r_dst_ptr = &dst */
+	nop,
+
+	/* Load src.x/y/z from r_src_ptr (caller-determined address) into r_tmp/r_recip_est/r_branch_tmp.
+	 * r_tmp holds src.x throughout stages 1-2 — r_mac2_scratch is clobbered to MAC2 in stage 1.5 (line below). */
+	load_word(r_tmp,          r_src_ptr, O_(V3_S4,x)),
+	load_word(r_recip_est,    r_src_ptr, O_(V3_S4,y)),
+	load_word(r_branch_tmp,   r_src_ptr, O_(V3_S4,z)),
 	nop, /* load-delay */
 
-	/* ── 48-word normalize body (preserved verbatim from ac_normalize_v3s4) ─────── */
-	// Stage 1: mtc2 src → IR1/2/3, SQR fires (MAC1/2/3 = IR², IR ← MAC saturated)
-	gte_mv_to_data_r(r_sx, C2_IR1),
-	gte_mv_to_data_r(r_sy, C2_IR2),
-	gte_mv_to_data_r(r_sz, C2_IR3),
+	/* Stage 1: mtc2 src → IR1/2/3, SQR fires. */
+	gte_mv_to_data_r(r_tmp,        C2_IR1),
+	gte_mv_to_data_r(r_recip_est,  C2_IR2),
+	gte_mv_to_data_r(r_branch_tmp, C2_IR3),
 	nop, gte_cmdw_sqr,
-	// Stage 2: mfc2 MAC1/2/3, sum, mtc2 LZCS
-	gte_mv_from_data_r(r_sq_y,      C2_MAC1), /* r_sq_y = MAC1 = sx² */
-	gte_mv_from_data_r(r_sq_z,      C2_MAC2), /* r_sq_z = MAC2 = sy² */
-	gte_mv_from_data_r(r_recip_est, C2_MAC3), /* r_recip_est = MAC3 = sz² */
-	nop,                                      /* MFC2→GPR load delay (1 slot) */
-	add_u(r_recip_est, r_recip_est, r_sq_z),  /* r_recip_est += sy² */
-	add_u(r_recip_est, r_recip_est, r_sq_y),  /* r_recip_est += sx² (sum = |v|²) */
-	gte_mv_to_data_r(  r_recip_est, C2_LZCS), /* LZCS = |v|² */
+
+	/* Stage 2: mfc2 MAC1/2/3, sum, mtc2 LZCS. */
+	gte_mv_from_data_r(r_mac1_scratch, C2_MAC1),
+	gte_mv_from_data_r(r_mac2_scratch, C2_MAC2),
+	gte_mv_from_data_r(r_lzcr,         C2_MAC3),
+	nop,
+	add_u(r_lzcr, r_lzcr, r_mac2_scratch),
+	add_u(r_lzcr, r_lzcr, r_mac1_scratch),
+	gte_mv_to_data_r(r_lzcr, C2_LZCS),
 	nop2,
-	gte_mv_from_data_r(r_lzcr, C2_LZCR),      /* r_lzcr = LZCR (count of leading bits) */
-	nop,                                      /* MFC2→GPR load delay (1 slot) */
-	// Stage 3: compute shift amount, align |v|² to bit 24, lookup 1/|v|
-	and_i(         r_lzcr, r_lzcr, -2),       /* r_lzcr &= ~1 (force even for halving) */
-	li_s(          r_shift, 31),              /* r_shift = 31 */
-	sub_s(         r_shift, r_shift, r_lzcr), /* r_shift = 31 - LZCR */
-	shift_aright(  r_shift, r_shift,  1),     /* r_shift = (31 - LZCR) / 2 */
-	add_si(        r_tmp,   r_lzcr, -24),     /* r_tmp = LZCR - 24 (signed, for branch) */
-	branch_lt_zero(r_tmp, atom_offset(srav_path, aligned_done)), nop,
-	jump_rel(             atom_offset(aligned_done, srav_path)),
-	shift_lleft_var(r_recip_est, r_recip_est, r_tmp),     /* BD-slot of branch_equal: r_recip_est = |v|² << (LZCR - 24) */
-atom_label(srav_path)                                 /* SRAV path: |v|² is small (top bit < bit 24) */
-	li_s(          r_tmp, 24),
-	sub_s(         r_tmp, r_tmp, r_lzcr),                 /* r_tmp = 24 - LZCR */
-	shift_aright_var(r_recip_est, r_recip_est, r_tmp),    /* r_recip_est = |v|² >> (24 - LZCR) */
-atom_label(aligned_done)                                /* Both paths converge here with |v|² aligned to bit 24 */
-	/* r_recip_est now holds |v|² aligned to bit 24 — convert to byte offset, -64 to skip zero pad. */
-	add_si(        r_recip_est, r_recip_est, -64),
-	shift_lleft(   r_recip_est, r_recip_est, 1),           /* r_recip_est *= 2 (half-word index) */
-	/* Reference OUR local sqrtbl via &-address split. Compiler/linker resolves both halves. */
-	load_upper_i(  r_tmp, u4_hi(& gte_normalize_sqr_tbl)), /* lui */
-	or_i_self(     r_tmp, u4_lo(& gte_normalize_sqr_tbl)), /* ori */
-	add_u(         r_tmp, r_tmp, r_recip_est),             /* r_tmp = sqrtbl base + byte offset (matches libgte 0x80016118: addu t5,t5,t4) */
-	load_half(     r_recip_est, r_tmp, 0),                 /* r_recip_est = sqrtbl[r_recip_est] = 1/|v| estimate */
-	nop,                                                   /* retire load_half before MTC2 (matches libgte 0x80016120: nop) */
-	// Stage 4: mtc2 IR0..3, GPF (MAC = IR0*IR), mfc2 MAC, srav finalize
-	gte_mv_to_data_r(r_recip_est, C2_IR0),  /* IR0 = 1/|v| estimate */
-	gte_mv_to_data_r(r_sx,        C2_IR1),  /* IR1 = src.x */
-	gte_mv_to_data_r(r_sy,        C2_IR2),  /* IR2 = src.y */
-	gte_mv_to_data_r(r_sz,        C2_IR3),  /* IR3 = src.z */
-	nop2,                                   /* COP2 transfer latency (2 slots) */
-	gte_cmdw_gpf,
-	gte_mv_from_data_r(r_sx, C2_MAC1),      /* MAC1 → r_sx (overwrites src.x with raw reciprocal-scaled) */
-	gte_mv_from_data_r(r_sy, C2_MAC2),
-	gte_mv_from_data_r(r_sz, C2_MAC3),
-	shift_aright_var(r_sx, r_sx, r_shift),
-	shift_aright_var(r_sy, r_sy, r_shift),
-	shift_aright_var(r_sz, r_sz, r_shift),
+	gte_mv_from_data_r(r_shift, C2_LZCR),
+	nop,
 
-	/* ── I/O wrapper tail (~3 words) ───────────────────────────────────────────── */
-	store_word(r_sx, r_dst, O_(V3_S4,x)),
-	store_word(r_sy, r_dst, O_(V3_S4,y)),
-	store_word(r_sz, r_dst, O_(V3_S4,z)),
+	/* Stage 3: compute srav amount (r_lzcr) + align |v|² to bit 24.
+	 * IMPORTANT: the sllv/srav below writes the aligned |v|² to r_mac1_scratch (NOT r_lzcr),
+	 * so r_lzcr retains the shift count all the way to the start of stage 4.
+	 */
+	and_i(   r_shift, r_shift, -2),
+	or_u(r_mac1_scratch, r_lzcr, 0),                            /* FIX B: save sum before clobbering r_lzcr with shift count */
+	li_s(    r_lzcr,           31),
+	sub_s(   r_lzcr, r_lzcr, r_shift),
+	shift_aright(r_lzcr, r_lzcr, 1),
+	/* r_branch_tmp = LZCR - 24 (overwrites r_branch_tmp; src.z no longer needed after SQR) */
+	add_si(  r_branch_tmp, r_shift, -24),
+	branch_lt_zero(r_branch_tmp, atom_offset(aligned_done, srav_path)), nop,    /* FIX A: bltz → srav_path (LZCR<24 path) */
+	jump_rel(atom_offset(srav_path, aligned_done)),                              /* FIX A: b → aligned_done (LZCR>=24 path) */
+	shift_lleft_var(r_mac1_scratch, r_mac1_scratch, r_branch_tmp),              /* FIX B: src=sum (r_mac1_scratch), dst=same */
+	atom_label(srav_path)
+	li_s(    r_branch_tmp, 24),
+	sub_s(   r_branch_tmp, r_branch_tmp, r_shift),
+	shift_aright_var(r_mac1_scratch, r_mac1_scratch, r_branch_tmp),             /* FIX B: src=sum (r_mac1_scratch), dst=same */
+	atom_label(aligned_done)
+	/* Save the shift count to r_shift before the next 5 instructions overwrite r_lzcr
+	 * (the sqrtbl lookup loads 1/|v| into r_lzcr, which becomes IR0 in stage 4). */
+	or_u(r_shift, r_lzcr, 0),                                    /* r_shift ← shift count (preserved through stage 4) */
+	/* r_mac1_scratch holds |v|² aligned (top bit at bit 7). */
+	add_si(     r_mac1_scratch, r_mac1_scratch, -64),
+	shift_lleft(r_mac1_scratch, r_mac1_scratch, 1),
+	load_upper_i(r_branch_tmp, u4_hi(& gte_normalize_sqr_tbl)),
+	or_i_self(   r_branch_tmp, u4_lo(& gte_normalize_sqr_tbl)),
+	add_u(r_branch_tmp, r_branch_tmp, r_mac1_scratch),
+	load_half(r_lzcr,   r_branch_tmp, 0), nop,                  /* r_lzcr = sqrtbl[aligned-64] = 1/|v| (IR0 in stage 4) */
+
+	/* FIX bug C: r_branch_tmp held the sqrtbl base+index, NOT src.z. Reload src.z from scratch now that r_branch_tmp is free. */
+	load_word(r_branch_tmp, r_src_ptr, O_(V3_S4,z)), nop,        /* r_branch_tmp = src.z (for IR3 in stage 4) */
+
+	/* Stage 4: GPF + srav finalize (r_shift = shift count, r_lzcr = 1/|v|). */
+	gte_mv_to_data_r(r_lzcr,         C2_IR0),
+	gte_mv_to_data_r(r_tmp,          C2_IR1),                    /* IR1 = src.x (preserved in r_tmp — r_mac2_scratch was clobbered to MAC2 in stage 1.5) */
+	gte_mv_to_data_r(r_recip_est,    C2_IR2),
+	gte_mv_to_data_r(r_branch_tmp,   C2_IR3),                    /* IR3 = src.z (reloaded) */
+	nop2, gte_cmdw_gpf,
+	gte_mv_from_data_r(r_mac2_scratch, C2_MAC1),
+	gte_mv_from_data_r(r_recip_est,    C2_MAC2),
+	gte_mv_from_data_r(r_branch_tmp,   C2_MAC3),
+	shift_aright_var(r_mac2_scratch, r_mac2_scratch, r_shift),   /* sra by r_shift = (31-LZCR)/2 (saved before sqrtbl lookup) */
+	shift_aright_var(r_recip_est,    r_recip_est,    r_shift),
+	shift_aright_var(r_branch_tmp,   r_branch_tmp,   r_shift),
+
+	/* Store result.x/y/z to r_dst_ptr (caller-determined dst address). */
+	store_word(r_mac2_scratch, r_dst_ptr, O_(V3_S4,x)),
+	store_word(r_recip_est,    r_dst_ptr, O_(V3_S4,y)),
+	store_word(r_branch_tmp,   r_dst_ptr, O_(V3_S4,z)),
 
-	/* ── atom_reads(R_TapePtr) atom_writes(R_TapePtr) ────────────────────────── */
 	mac_yield()
 })
 
-#pragma endregion MACs (Mips Atom Components)
+#pragma endregion Atom Procs
 
-#pragma region Bsked Atoms
+#pragma region Baked Atoms
 
 typedef Struct_(Binds_SetGteMT3S2S4) {
 	MT3_S2S4* transform;

code/duffle/gte.h

@@ -191,6 +191,30 @@ enum {
 	gte_mask_fake_cmd  = 0x1F,
 };
 
+/* --- GTE Control Register Aliases (Pitfall 1) ---
+ * Three pairs of aliases map to the SAME C2 control-register slot on real silicon:
+ *   C2[24] = gte_cr_RBK (background R)         | gte_cr_OFX (screen offset X)
+ *   C2[25] = gte_cr_GBK (background G)         | gte_cr_OFY (screen offset Y)
+ *   C2[26] = gte_cr_BBK (background B)         | gte_cr_H   (projection plane distance H)
+ * Cross-alias writes inside one atom body, or across the wave-context boundary,
+ * silently clobber each other. The metaprogram's check_gte_cr_alias_writes
+ * (CHECK_RULES row) warns about each pair per source. See
+ * docs/gte_reference.md §"Control-register alias table" for the silicon
+ * rationale and the libgte outer-product convention.
+ */
+
+/* --- RT-matrix packed-slot convention (Pitfall 4) ---
+ * The silicon packs two 16-bit RT elements per 32-bit C2 slot:
+ *   C2[2] = (RT22 << 16) | RT13       (gte_cr_RT13 writes the low  half, gte_cr_RT22 writes the high half)
+ *   C2[4] = (RT33 << 16) | RT22       (gte_cr_RT22 writes the low  half — clobbers prior RT22 value if RT13 was also written)
+ * OP and MVMVA read D1/D2/D3 from these packed slots. The libgte outer-product
+ * convention (see ac_apply_matrix_lv at gte.atom.c:108-122) writes C2[2] then
+ * C2[4] in sequence; the SECOND write's low half is RT22, not RT13. An agent
+ * who writes gte_cr_RT13 then gte_cr_RT22 to the SAME source GPR clobbers the
+ * RT13 value. See docs/gte_reference.md §"RT-matrix packed-slot convention"
+ * for the canonical write pattern.
+ */
+
 /* --- GTE Control Register Indices (for ctc2/cfc2) ---
  * Preprocessor-visible integer ids for the COP2 control register file.
  * Each enum value is bound to a parallel `_Code` `#define` so the preprocessor can stringify the integer (for `reg_str`/`rgcc` paths).
@@ -391,6 +415,56 @@ enum { _C2_TX_SUBS_ = 0
 	* The wedge alias is the 3D complement interpretation of the same 3 scalars (MAC1..MAC3). */
 #define gte_cmdw_mvmva  (gte_cmd_base | enc_gte_cmd(gte_cmd_mvmva))
 
+/* MVMVA with sf=0 (no shift, full-integer), cv=3 (no translation), v=3 (IR vector input).
+ * Reads input from IR1/2/3 (loaded via mtc2 rt, C2_IRx). MAC1/2/3 = RT row · IR (full product, no >>12).
+ * Per PSX-SPX: SAR (sf*12) with sf=0 = SAR 0 = no shift. */
+#define gte_cmdw_mvmva_sf0_ir  (gte_cmd_base | enc_gte_cv(3) | enc_gte_v(3) | enc_gte_cmd(gte_cmd_mvmva))
+
+/* MVMVA with sf=1 (>>12 shift, 4.12 fixed-point), cv=3 (no translation), v=3 (IR): for ApplyMatrixLV.
+ * Reads input from IR1/2/3 (loaded via mtc2 rt, C2_IRx). MAC1/2/3 = (RT row · IR) >> 12.
+ * Per PSX-SPX: SAR (sf*12) with sf=1 = SAR 12 = arithmetic right-shift by 12.
+ * This matches the libgte C-side ApplyMatrixLV output (R*pos >> 12). */
+#define gte_cmdw_mvmva_ir    (gte_cmd_base | enc_gte_sf(1) | enc_gte_cv(3) | enc_gte_v(3) | enc_gte_cmd(gte_cmd_mvmva))
+
+/* MVMVA: sf=0, mx=3 (Light matrix), v=3 (IR), cv=3 (no TR).
+ * For pass1 of the C11 two-pass decomposition. Reads L matrix.
+ * Since L matrix is typically zero, pass1 contributes 0 to the combine. */
+#define gte_cmdw_mvmva_sf0_mx3_v3_cv3  (gte_cmd_base | enc_gte_sf(0) | enc_gte_cv(3) | enc_gte_v(3) | enc_gte_mx(3) | enc_gte_cmd(gte_cmd_mvmva))
+
+/* MVMVA: sf=1 (>>12), mx=3 (Light matrix), v=2 (V0), cv=0 (with TR).
+ * Matches the C11 ApplyMatrixLV pass 2 command word (0x49E012) exactly.
+ * The combine is (pass1 << 3) + pass2. */
+#define gte_cmdw_mvmva_pass2_c11  (gte_cmd_base | enc_gte_sf(1) | enc_gte_v(2) | enc_gte_mx(3) | enc_gte_cmd(gte_cmd_mvmva))
+
+/* MVMVA: sf=0, mx=3, v=2, cv=0. Matches the C11 pass 1 command. */
+#define gte_cmdw_mvmva_pass1_c11  (gte_cmd_base | enc_gte_v(2) | enc_gte_mx(3) | enc_gte_cmd(gte_cmd_mvmva))
+#define gte_cmdw_mvmva_no_tr gte_cmdw_mvmva_ir
+
+/* MVMVA pass 2 — EXACT C11 ApplyMatrixLV command.
+ * Command word: 0x4A49E012.
+ * bits 31-26: 010010 = COP2
+ * bit 25: 1 (CO set)
+ * bits 24-20: 01001 = 9 (fake_cmd)
+ * bit 19: 1 (sf=1)
+ * bits 18-17: 00 (mx=0, RT matrix)
+ * bits 16-15: 11 (v=3, IR)
+ * bits 14-13: 11 (cv=3, no translation)
+ * bits 5-0: 010010 = MVMVA
+ * sf=1, mx=0, v=3, cv=3. Pass 2 reads RT matrix, IR input, >>12. */
+#define gte_cmdw_mvmva_c11_pass2_exact  0x4A49E012
+
+/* MVMVA pass 1 — C11's exact command: 0x4A41E012.
+ * bit 25: 1, sf=0, mx=0, v=3, cv=3. Pass 1 reads RT matrix, IR input, no shift. */
+#define gte_cmdw_mvmva_c11_pass1_exact  0x4A41E012
+
+/* MVMVA: sf=1 (>>12), mx=0 (RT matrix), v=0 (V0), cv=3 (no TR). */
+#define gte_cmdw_mvmva_sf1_mx0_v0_cv3  (gte_cmd_base | enc_gte_sf(1) | enc_gte_cv(3) | enc_gte_v(0) | enc_gte_mx(0) | enc_gte_cmd(gte_cmd_mvmva))
+
+/* RTPS with sf=1 (12-bit shift, no translation): matches the output of libgte's
+ * ApplyMatrixLV when the GTE pipeline expects R*pos >> 12. The shift produces
+ * values like (-270, 710, 1713) which match the C11 reference path. */
+#define gte_cmdw_rtps_sf1   (gte_cmd_base | enc_gte_sf(1) | enc_gte_cv(3) | enc_gte_cmd(gte_cmd_rtps))
+
 /* SQR / GPF cosmetic-bits compat helpers.
  * Each command's `_compat` macro ORs in the `fake_cmd` field value libgte happens to emit.
  * The hardware ignores these bits (per PSX-SPX line 48). */

code/duffle/lottes_tape.h

@@ -23,13 +23,13 @@
  * directly executed chain of assemby arrays (Atoms) that terminate with a yield sequence to the next atom.
  * These eventually lead to a terminal atom for the tape which is defined below as "tape_exit".
  * 
- * This behaves as one of the simplest runtime harnesses ontop of a host-enviornment's execution engine 
+ * It behaves as one of the simplest runtime harnesses ontop of a host-enviornment's execution engine 
  * to author and compose programs with. From here various conventions can be further applied. 
  * To make things easier  to understand it may be better to focus on what this ABI does not have. 
  * It does not have have any branching within the tape but relative branches within atoms or between atoms.
- * Branching nearly is always downstream. Stack usage is non-existent.
+ * Branching nearly is always downstream. Automatic stack usage is non-existent.
  * Push/Pop, FIFO, or Arena/Bump data structures are used by atoms explicitly.
- * In it's current form with the C11 macro dsl, the user also has fullfill manual register allocation per atom.
+ * In it's current form with the C11 macro DSL, the user also has fullfill manual register allocation per atom.
  * 
  * One of the remarkable things about utilizing this ABI is its essentially interopable with CPUs, GPUs, FPGA, 
  * or, basically anything from the 5th generation consoles and onward.
@@ -39,10 +39,10 @@
  * but, we can set the foundation for legoing whats required for eventually expanding this ABI's paradigm 
  * and core atoms to take those newer hardware features into account. For example, you can easily expand 
  * this to support wave-based execution model on a PS2 or PS3. Not having a stack or 
- * automatic register allocation means the user cannott ignore excessive argument shuffle across workload or
+ * automatic register allocation means the user cannot ignore excessive argument shuffle across workload or
  * waves and thier phases. Crossing ABI boundaries to other runtimes that do has obviouss penalties.
  * 
- * Learning data-oreinted code becomes a natural progression. Your not fighting a stack-based procedural 
+ * Learning data-oriented code becomes a natural progression. Your not fighting a stack-based procedural 
  * paradigm that wants to argument shuffle. There is no ambiguity due to the lack of constraints, for example,
  * on how the user may "call" a procedure in traditional random dispatch runtimes. The user does have to
  * hammer down "rules" or patterns for massaging the compiler to dissolve those call frames; just to get 
@@ -100,17 +100,27 @@ enum {
 	// S 0-7
 };
 
+typedef U2 Reg; // Register parameter used with atom or atom component procedures
+
 typedef U4 const MipsCode; // Underlying type to mips asm words.
 typedef Slice_(MipsCode);
 
-typedef U4 const MipsAtom; // Underlying type to an array of mips asm words that must terminate with an ac_yield.
+typedef U4 const MipsAtom; 
+typedef Slice_(MipsAtom); 
+// Sometimes a user will define a bundle of atoms that represent a procedure of work as:
+//   MipsAtom* <identifier>[...];
+// Unfortuantely if using slice_from_array it will make the slice's pointer: MipsAtom** so this enforce its defined as MipsAtom*
+// TODO(Ed): Alternatively we can make the MipsAtom an opaque pointer to the atom... so that the blow returns 'MipsAtom'.
+#define atombundle_from_array(array) (Slice_MipsAtom){.ptr=array[0],.len=Array_len(array)}
+
+// Underlying type to an ptr to an array of mips asm words that must terminate with an ac_yield.
 #define MipsAtom_(sym) MipsCode sym [] align_(4) =
 
 // Used for atoms with value-args
 //   FI_ void ac_X(args) MipsAtomComp_Proc_(ac_X, { body })
 // expands to:
 //   FI_ void ac_X(args) { MipsCode ac_X[] align_(4) = { body }; return ac_X; }
-#define MipsAtom_Proc_(sym, abuilder, ...) { MipsCode sym [] align_(4) = __VA_ARGS__; atombuilder_unroll(abuilder, slice_from_array(MipsCode, sym)); }
+#define MipsAtom_Proc_(sym, aa, ...) { MipsCode sym [] align_(4) = __VA_ARGS__; return atomarena_push(aa, slice_from_array(MipsCode, sym)); }
 
 // Used for components with no args (e.g., ac_load_tri_indices) or identifier-args (hardcoded register names).
 //   MipsAtomComp_(ac_X) { body }
@@ -128,7 +138,7 @@ typedef U4 const MipsAtom; // Underlying type to an array of mips asm words that
 // The body must NOT include mac_yield() (the parent atom yields).
 // Inline-only callers (the generated `mac_<name>` aliases) skip this arg via metaprogram filtering;
 // escape callers (ac_<name> invoked as a function) pass a long-lived builder.
-#define MipsAtomComp_Proc_(sym, ab, ...) { MipsCode sym [] align_(4) = __VA_ARGS__; atombuilder_unroll(ab, slice_from_array(MipsCode, sym)); }
+#define MipsAtomComp_Proc_(sym, ab, ...) { MipsCode sym [] align_(4) = __VA_ARGS__; atombuilder_push(ab, slice_from_array(MipsCode, sym)); }
 
 /* Line-table anchor: gcc only adds a file to the .debug_line file table when the contains line-numbered content.
 	Files containing only atoms and atom components.
@@ -139,10 +149,10 @@ typedef U4 const MipsAtom; // Underlying type to an array of mips asm words that
 	 (the identifier embeds the source line, so duplicates across `#include`d files don't collide). */
 #define ATOM_FILE_DEBUGGER_LINE_MARKER(file_name) internal U4 const tmpl(atom_file_debugger_line_marker,file_name) = 0
 
- typedef Slice_(MipsAtom); typedef Slice_MipsAtom Tape;
+typedef Slice_MipsAtom Tape;
 
 /* The 'Exit' Atom */
-atom_dbg_skip MipsAtom_(tape_exit) { jump_reg(rret_addr), nop };
+atom_dbg_skip MipsAtom_(tape_exit) { jump_reg(R_RA), nop };
 
 // TODO(Ed): When we have a substantial workload/throughput, profile each of these to see impact at ABI boundaries.
 
@@ -186,14 +196,14 @@ FI_ void tape_run_a02_s07(Tape tape) { register U4* tape_ptr rgcc(R_TapePtr) = u
 typedef Relative_(FArena) Struct_(TapeBuilder) { U4 ptr; U4 capacity; U4 used; };
 FI_ void        tb_init(TapeBuilder* tb, FArena* arena) { tb->ptr = arena->start; tb->used = 0; }
 FI_ TapeBuilder tb_make_old(             FArena* arena) { return (TapeBuilder){ arena->start, 0 }; }
-FI_ TapeBuilder tb_make(Slice mem) { return (TapeBuilder){ mem.ptr, mem.len, 0 }; }
+FI_ TapeBuilder tb_make(Slice mem) { return (TapeBuilder){ u4_(mem.ptr), mem.len, 0 }; }  /* capacity in elements (matches used units) */
 
 FI_ void tb_emit(TapeBuilder* tb, MipsAtom* atom) { u4_r(tb->ptr)[tb->used] = u4_(atom); ++ tb->used; }
 FI_ void tb_data(TapeBuilder* tb, U4        data) { u4_r(tb->ptr)[tb->used] = u4_(data); ++ tb->used; }
 #define tb_emit_(atom)        tb_emit(& tb, atom)
 #define tb_data_(field, data) tb_data(& tb, u4_(data))
 
-FI_ void tb_emit_bundle(TapeBuilder_R tb, Slice_MipsAtom atoms) { mem_copy(u4_(tb->ptr), u4_(atoms.ptr), tb->used); tb->used += atoms.len; }
+FI_ void tb_emit_bundle(TapeBuilder_R tb, Slice_MipsAtom atoms) { mem_copy(u4_(tb->ptr), u4_(atoms.ptr), S_slice(atoms)); tb->used += atoms.len; }
 
 FI_ Tape tb_end  (TapeBuilder* tb) { tb_emit(tb,tape_exit); return (Tape){ C_(U4*,tb->ptr), tb->used }; }
 FI_ Tape tb_slice(TapeBuilder  tb) {                        return (Tape){ C_(U4*,tb.ptr),  tb.used }; }
@@ -231,38 +241,78 @@ atom_dbg_skip MipsAtomComp_(ac_yield_tail) {
 };
 #pragma endregion Macro Atom Components
 
-#pragma region Mips Atom Builder
+#pragma region Atom Builder
 // This helps with runtime procedural authoring of mips atoms.
 
 typedef Struct_(FMipsAtom512) { U4 data[512]; U4 used; };
 
 // FArena Related
-typedef Relative_(FArena) Struct_(MipsAtomBuilder) { U4 start; U4 capacity; U4 used; };
-// Whatever the builder is writting to should most likely coresspond
-// to something that can fit within instruction cache?
+typedef Relative_(FArena) Struct_(AtomBuilder) { U4 start; U4 capacity; U4 used; };
 
-FI_ void atombuilder_unroll(MipsAtomBuilder_R ab, Slice_MipsCode code) {
+// Usual way to resolve an atom after the bulder is done.
+#define atom_from_atombuilder(ab) C_(MipsAtom*, (ab).start)
+
+FI_ void atombuilder_push(AtomBuilder_R ab, Slice_MipsCode code) {
 	assert(ab->capacity - ab->used - code.len);
-	U4* dest = (U4*)ab->start + ab->used;  /* write at next-available slot (arena accumulation) */
-	mem_copy(u4_(dest), u4_(code.ptr), code.len);
-	mem_bump(ab->start, ab->capacity, & ab->used, code.len);
+	U4 dest = ab->start + ab->used * S_(MipsCode); U4 size = S_slice(code);
+	mem_copy(dest, u4_(code.ptr), size); ab->used += size;
 }
-#define atombuilder_unroll_mac(ab, mac) atombuilder_unroll(ab, slice_arg_from_array(Slice_MipsCode, mac))
+#define atombuilder_push_mac(ab, mac) atombuilder_push(ab, slice_arg_from_array(Slice_MipsCode, mac))
 
 // When done authoring, utilize this to cap-off the atom (if not utilizing a MipsAtom_Proc).
-FI_ void atombuilder_end(MipsAtomBuilder_R ab) {
-	U4* dest = (U4*)ab->start + ab->used;  /* write at next-available slot */
-	mem_copy(u4_(dest), u4_(ac_yield), S_(ac_yield));
-	mem_bump(ab->start, ab->capacity, & ab->used, S_(ac_yield));
+FI_ void atombuilder_end(AtomBuilder_R ab) { atombuilder_push(ab, slice_from_array(MipsCode, ac_yield)); }
+
+FI_ void tb_emit_atombuilder(TapeBuilder_R tb, AtomBuilder_R ab) { tb_emit(tb, atom_from_atombuilder(ab[0])); }
+#pragma endregion Mips Atom Builder
+
+#pragma region Atom Arena
+// Just a dedicated FArena that is meant to mem_copy and return atom definitions made with MipsAtom_Proc_
+
+typedef Relative_(FArena) Struct_(AtomArena) { U4 start; U4 capacity; U4 used; };
+
+#define atomarena_unused_start(ab) ((ab).start + (ab).used)
+FI_ void atomarena_init(AtomArena_R arena, Slice mem) {  assert(arena != nullptr);
+	arena->start    = u4_(mem.ptr);
+	arena->capacity = mem.len;
+	arena->used     = 0;
+}
+FI_ AtomArena atomarena_make(Slice mem) { AtomArena a; atomarena_init(& a, mem); return a; }
+FI_ MipsAtom* atomarena_push(AtomArena_R aa, Slice_MipsCode code) {
+	assert(aa->capacity - aa->used - code.len);
+	U4 dest = atomarena_unused_start(aa[0]); U4 size = S_slice(code);
+	mem_copy(dest, u4_(code.ptr), size); aa->used += size;
+	return C_(MipsAtom*, dest);
+}
+FI_ void atomarena_reset(AtomArena_R aa) { aa->used = 0; }
+#pragma region Atom Arena
+
+#pragma region RegFile (Register File Allocator)
+// A specialized allocator utilized to help the user track which registers are bound to values
+// that must be preserved for the arena's bounds.
+
+enum {
+	RegFileArena_Len,
+};
+typedef Enum_(U4, RegFileEntry) {
+	// TODO(Ed): Define RF_Field, each field is maped by index + bit pos.
+	// the index is the upper portion of a U4 and the bit pos in the lower pos.
+
+	regfileentry_todo_,
+	// TODO(Ed): Is there a trick we can do with the current register enums to 
+	// just resolve an entry automatically when doing a pin?
+};
+typedef Struct_(RegFile) {
+	U1 GPR[RegFileArena_Len];
+	U1 GTE[RegFileArena_Len];
+	U1 GP[RegFileArena_Len];
+};
+
+void regfile_pin(U4 register) {
+
+	assert(false);
 }
 
-#define mipsatom_from_builder(ab) C_(MipsAtom*, (ab).start)
-
-// tb_emit_builder(tb, ab) — emit the builder's atom into the tape and advance tb->used.
-// Thin wrapper around tb_emit(tb, mipsatom_from_builder(ab[0])).
-// Equivalent to tb_emit(tb, code_<name>) for runtime-built atoms.
-FI_ void tb_emit_builder(TapeBuilder_R tb, MipsAtomBuilder_R ab) { tb_emit(tb, mipsatom_from_builder(ab[0])); }
-#pragma endregion Mips Atom Builder
+#pragma endregion RegFileArena (Register File Allocator)
 
 #pragma region Mips Atom Procs
 

code/duffle/math.atom.c

@@ -9,35 +9,41 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(math_atom_c);
 
 #pragma region MACs (Mips Atom Component)
 
-FI_ Slice_MipsCode ac_load_v2s2(MipsAtomBuilder_R ab, U4 rs_x, U4 rs_y, U4 r_base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_load_v2s2, ab, {
-	load_half( rs_x, r_base, O_(V3_S2,x)),
-	load_half( rs_y, r_base, O_(V3_S2,y)),
+FI_ Slice_MipsCode ac_load_v2s2(AtomBuilder_R ab, U4 rs_x, U4 rs_y, U4 r_base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_load_v2s2, ab, {
+	load_half( rs_x, r_base, offset + O_(V3_S2,x)),
+	load_half( rs_y, r_base, offset + O_(V3_S2,y)),
 })
 
-FI_ Slice_MipsCode ac_store_v2s2(MipsAtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_v2s2, ab, {
+FI_ Slice_MipsCode ac_store_v2s2(AtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_v2s2, ab, {
 	store_half(rt_x, base, offset + O_(V2_S2,x)),
 	store_half(rt_y, base, offset + O_(V2_S2,y)),
 })
 
-FI_ Slice_MipsCode ac_load_v3s4(MipsAtomBuilder_R ab, U4 rs_x, U4 rs_y, U4 rs_z, U4 r_base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_load_v3s4, ab, {
-	load_word( rs_x, r_base, O_(V3_S4,x)),
-	load_word( rs_y, r_base, O_(V3_S4,y)),
-	load_word( rs_z, r_base, O_(V3_S4,z)),
+FI_ Slice_MipsCode ac_load_v3s4(AtomBuilder_R ab, U4 rs_x, U4 rs_y, U4 rs_z, U4 r_base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_load_v3s4, ab, {
+	load_word( rs_x, r_base, offset + O_(V3_S4,x)),
+	load_word( rs_y, r_base, offset + O_(V3_S4,y)),
+	load_word( rs_z, r_base, offset + O_(V3_S4,z)),
 })
+// TODO(Ed): we could generate these mappings properly..
+#define ac_load_p3s4 ac_load_v3s4
+#define mac_load_p3s4 mac_load_v3s4
 
-FI_ Slice_MipsCode ac_store_v3s4(MipsAtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 rt_z, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_v3s4, ab, {
+FI_ Slice_MipsCode ac_store_v3s4(AtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 rt_z, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_v3s4, ab, {
 	store_word(rt_x, base, offset + O_(V3_S4,x)),
 	store_word(rt_y, base, offset + O_(V3_S4,y)),
 	store_word(rt_z, base, offset + O_(V3_S4,z)),
 })
+// TODO(Ed): we could generate these mappings properly..
+#define ac_store_p3s4 ac_store_v3s4
+#define mac_store_p3s4 mac_store_v3s4
 
-FI_ Slice_MipsCode ac_sub_v3s4(MipsAtomBuilder_R ab, U4 rds_x, U4 rds_y, U4 rds_z, U4 rt_x,  U4 rt_y,  U4 rt_z) atom_dbg_skip MipsAtomComp_Proc_(ac_sub_v3s4, ab, {
+FI_ Slice_MipsCode ac_sub_v3s4(AtomBuilder_R ab, U4 rds_x, U4 rds_y, U4 rds_z, U4 rt_x,  U4 rt_y,  U4 rt_z) atom_dbg_skip MipsAtomComp_Proc_(ac_sub_v3s4, ab, {
 	sub_s(rds_x, rds_x, rt_x),
 	sub_s(rds_y, rds_y, rt_y),
 	sub_s(rds_z, rds_z, rt_z),
 })
 
-FI_ Slice_MipsCode ac_store_rects2(MipsAtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 rt_width, U4 rt_height, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_rects2, ab, {
+FI_ Slice_MipsCode ac_store_rects2(AtomBuilder_R ab, U4 rt_x, U4 rt_y, U4 rt_width, U4 rt_height, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_rects2, ab, {
 	store_half(rt_x,      base, offset + O_(Rect_S2,x)),
 	store_half(rt_y,      base, offset + O_(Rect_S2,y)),
 	store_half(rt_width,  base, offset + O_(Rect_S2,width)),

code/duffle/memory.h

@@ -18,7 +18,7 @@ I_ U4 align_pow2(U4 x, U4 b) {
 
 #define align_struct(type_width) ((U4)(((type_width) + 3) & ~3))
 
-FI_ void mem_bump(U4 start, U4 cap, U4*R_ used, U4 amount) {
+FI_ void mem_bump(U4 cap, U4*R_ used, U4 amount) {
 	assert(amount <= (cap - used[0])); 
 	used[0] += amount; 
 }
@@ -58,13 +58,13 @@ typedef Struct_(Str8)        { UTF8* ptr; U4 len; };
 typedef Struct_(Slice_Str8)  { Str8* ptr; U4 len; };
 #define slit(string_literal) (Str8){ (UTF8*) string_literal, S_(string_literal) - 1 }
 
-typedef Struct_(Slice) { U4 ptr, len; }; // Untyped Slice
-FI_ Slice slice_ut_(U4 ptr, U4 len) { return (Slice){ptr, len}; }
+typedef Struct_(Slice) { B1* ptr; U4 len; }; // Untyped Slice (byte-addressable; .len in elements)
+FI_ Slice slice_ut_(U4 ptr, U4 len) { return (Slice){(B1*)ptr, len}; }
 
 #define Slice_(type)       Struct_(tmpl(Slice,type)) { type* ptr; U4 len; }
 typedef Slice_(B1);
 #define slice_assert(s)    do { assert((s).ptr != 0); assert((s).len > 0); } while(0)
-#define slice_end(slice)   ((slice).ptr + (slice).len)
+#define slice_end(slice)   ((slice).ptr + S_slice(slice) / S_(B1))  /* byte-ptr arithmetic; .len is in elements per slice convention */
 #define S_slice(s)         ((s).len * S_((s).ptr[0]))
 
 #define slice_ut(ptr,len)  slice_ut_(u4_(ptr),     u4_(len))
@@ -72,23 +72,30 @@ typedef Slice_(B1);
 #define slice_to_ut(s)     slice_ut_(u4_((s).ptr), S_slice(s))
 
 #define slice_iter(container, iter)     (T_((container).ptr) iter = (container).ptr; iter != slice_end(container); ++ iter)
-#define slice_arg_from_array(type, ...) & (tmpl(Slice,type)) { .ptr = array_decl(type,__VA_ARGS__), .len = array_len( array_decl(type,__VA_ARGS__)) }
-#define slice_from_array(type, array)     (tmpl(Slice,type)) { .ptr = array, .len = S_(array) }
+#define slice_arg_from_array(type, ...) & (tmpl(Slice,type)) { .ptr = Array_decl(type,__VA_ARGS__), .len = Array_len( Array_decl(type,__VA_ARGS__)) }
+#define slice_from_array(type, array)     (tmpl(Slice,type)) { .ptr = array, .len = S_(array) / S_(type) }
 
-FI_ void slice_zero_(Slice s) { slice_assert(s); mem_zero(s.ptr, s.len); }
+FI_ void slice_zero_(Slice s) { slice_assert(s); mem_zero(u4_(s.ptr), s.len); }
 #define  slice_zero(s)        slice_zero_(slice_to_ut(s))
 
 FI_ void slice_copy_(Slice dest, Slice src) {
-	assert(dest.len >= src.len);
+	assert(S_slice(dest) >= S_slice(src));
 	slice_assert(dest);
 	slice_assert(src);
-	mem_copy(dest.ptr, src.ptr, src.len);
+	mem_copy(u4_(dest.ptr), u4_(src.ptr), S_slice(src));
 }
 #define slice_copy(dest, src) do {  \
 	static_assert(T_same(dest, src)); \
 	slice_copy_(slice_to_ut(dest), slice_to_ut(src)); \
 } while(0)
 
+FI_ Slice slice_bump(U4_R used, U4 start, U4 len, U4 amount) {
+	assert(len - used[0] - amount);
+	U4 ptr = start + used[0]; used[0] += amount;
+	return slice_ut(ptr, amount);
+}
+
+typedef Slice_(U1);
 typedef Slice_(U4);
 
 #pragma endregion Slice
@@ -98,18 +105,19 @@ typedef Slice_(U4);
 typedef Opt_(farena)    { U4 alignment, type_width; };
 typedef Struct_(FArena) { U4 start, capacity, used; };
 FI_ void farena_init(FArena_R arena, Slice mem) {  assert(arena != nullptr);
-	arena->start    = mem.ptr;
+	arena->start    = u4_(mem.ptr);
 	arena->capacity = mem.len;
 	arena->used     = 0;
 }
 FI_ FArena farena_make(Slice mem) { FArena a; farena_init(& a, mem); return a; }
+FI_ Slice farena_bump(FArena_R a, U4 amount) { return slice_bump(& a->used, a->start, a->capacity, amount); }
 I_  Slice farena_push(FArena_R arena, U4 amount, Opt_farena o) {
 	if (amount == 0) { return (Slice){}; }
 	U4 desired   = amount * (o.type_width == 0 ? 1 : o.type_width);
 	U4 to_commit = align_pow2(desired, o.alignment ?  o.alignment : MEM_ALIGNMENT_DEFAULT);
 	U4 ptr       = arena->start + arena->used;
-	mem_bump(arena->start, arena->capacity, & arena->used, to_commit);
-	return (Slice){ ptr, to_commit };
+	mem_bump(arena->capacity, & arena->used, to_commit);
+	return (Slice){ (B1*)ptr, to_commit };
 }
 FI_ void farena_reset (FArena_R arena) { arena->used = 0; }
 FI_ void farena_rewind(FArena_R arena, U4 save_point) {
@@ -117,6 +125,7 @@ FI_ void farena_rewind(FArena_R arena, U4 save_point) {
 	arena->used -= save_point - arena->start;
 }
 FI_ U4 farena_save(FArena arena) { return arena.used; }
+FI_ U4 farena_unused_start(FArena arena) { return arena.start + arena.used; }
 #define farena_push_(arena, amount, ...)                                          farena_push((arena), (amount), opt_(farena, __VA_ARGS__))
 #define farena_push_type(arena, type, ...)                              C_(type*, farena_push((arena), 1,        opt_(farena, .type_width=S_(type), __VA_ARGS__)).ptr)
 #define farena_push_array(arena, type, amount, ...) (tmpl(Slice,type)){ C_(type*, farena_push((arena), (amount), opt_(farena, .type_width=S_(type), __VA_ARGS__)).ptr), (amount) }

code/duffle/mips.atom.c

@@ -20,14 +20,14 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(mips_atom_c);
  *   6. sp += 8
  */
 internal MipsAtom_(mips_flush_icache) {
-	add_ui(rstack_ptr, rstack_ptr, -MipsStackAlignment), // sp -= 8
-	store_word(rret_addr, rstack_ptr, S_(U4)),           // sw  $ra,   4($sp) 
-	add_ui(rret_0, rdiscard, bios_flushcache),           // addiu $a0, $0, 0x44 
-	add_ui(rtmp_0, rdiscard, bios_table_addr),           // addiu $t0, $0, 0xA0 
-	jump_link(rtmp_0, rret_addr), nop,                   // jalr  $t0, $ra, BD slot
-	load_word(rret_addr, rstack_ptr, S_(U4)),            // lw   $ra, 4($sp) 
-	jump_reg(rret_addr),                                 // jr   $ra 
-	add_ui(rstack_ptr, rstack_ptr, MipsStackAlignment),  // sp += 8 (BD) 
+	add_ui(R_SP, R_SP, -MipsStackAlignment), // sp -= 8
+	store_word(R_RA, R_SP, S_(U4)),           // sw  $ra,   4($sp) 
+	add_ui(R_V0, R_0, bios_flushcache),           // addiu $a0, $0, 0x44 
+	add_ui(R_T0, R_0, bios_table_addr),           // addiu $t0, $0, 0xA0 
+	jump_link(R_T0, R_RA), nop,                   // jalr  $t0, $ra, BD slot
+	load_word(R_RA, R_SP, S_(U4)),            // lw   $ra, 4($sp) 
+	jump_reg(R_RA),                                 // jr   $ra 
+	add_ui(R_SP, R_SP, MipsStackAlignment),  // sp += 8 (BD) 
 	mac_yield(),
 };
 

code/duffle/mips.h

@@ -136,31 +136,31 @@ enum {
 
 /* Semantic Aliases for MIPS Registers (O32 ABI) */
 
-	, rdiscard      = R_0  /* Hardwired to 0 */
-	, rasm_tmp      = R_AT /* Assembler temporary (destroyed by some assembler pseudoinstructions!) */
-	, rret_0        = R_V0 /* Function return value */
-	, rret_1        = R_V1 /* Second return value (e.g., 64-bit) */
-	, rarg_0        = R_A0 /* First function argument */
-	, rarg_1        = R_A1 /* Second function argument */
-	, rarg_2        = R_A2 /* Third function argument */
-	, rarg_3        = R_A3 /* Fourth function argument */
-	, rtmp_0        = R_T0 /* Temporary (Caller saved) */
-	, rtmp_1        = R_T1 /* Temporary (Caller saved) */
-	, rtmp_2        = R_T2 /* Temporary (Caller saved) */
-	, rtmp_3        = R_T3 /* Temporary (Caller saved) */
-	, rtmp_4        = R_T4 /* Temporary (Caller saved) — common GTE base pointer */
-	, rtmp_9        = R_T9 /* Temporary (Caller saved) — common GTE base pointer */
-	, rstatic_0     = R_S0 /* Static (Callee saved, preserved across calls) */
-	, rstatic_1     = R_S1
-	, rstatic_2     = R_S2
-	, rstatic_3     = R_S3
-	, rstatic_4     = R_S4
-	, rstatic_5     = R_S5
-	, rstatic_6     = R_S6
-	, rstatic_7     = R_S7
-	, rsaved_0      = R_S0 /* Alias for rstatic_0 (alternate vocabulary) */
-	, rstack_ptr    = R_SP /* Stack Pointer */
-	, rret_addr     = R_RA /* Return Address (populated by JAL) */
+	// , rdiscard      = R_0  /* Hardwired to 0 */
+	// , rasm_tmp      = R_AT /* Assembler temporary (destroyed by some assembler pseudoinstructions!) */
+	// , rret_0        = R_V0 /* Function return value */
+	// , rret_1        = R_V1 /* Second return value (e.g., 64-bit) */
+	// , rarg_0        = R_A0 /* First function argument */
+	// , rarg_1        = R_A1 /* Second function argument */
+	// , rarg_2        = R_A2 /* Third function argument */
+	// , rarg_3        = R_A3 /* Fourth function argument */
+	// , rtmp_0        = R_T0 /* Temporary (Caller saved) */
+	// , rtmp_1        = R_T1 /* Temporary (Caller saved) */
+	// , rtmp_2        = R_T2 /* Temporary (Caller saved) */
+	// , rtmp_3        = R_T3 /* Temporary (Caller saved) */
+	// , rtmp_4        = R_T4 /* Temporary (Caller saved) — common GTE base pointer */
+	// , rtmp_9        = R_T9 /* Temporary (Caller saved) — common GTE base pointer */
+	// , rstatic_0     = R_S0 /* Static (Callee saved, preserved across calls) */
+	// , rstatic_1     = R_S1
+	// , rstatic_2     = R_S2
+	// , rstatic_3     = R_S3
+	// , rstatic_4     = R_S4
+	// , rstatic_5     = R_S5
+	// , rstatic_6     = R_S6
+	// , rstatic_7     = R_S7
+	// , rsaved_0      = R_S0 /* Alias for rstatic_0 (alternate vocabulary) */
+	// , rstack_ptr    = R_SP /* Stack Pointer */
+	// , rret_addr     = R_RA /* Return Address (populated by JAL) */
 
 /* --- MIPS CPU Opcodes (Bits 31-26) --- */
 
@@ -453,7 +453,7 @@ enum { _BitOffsets = 0
 #define shift_amount(rd, rt, n)     shift_lleft(rd, rt, n)
 
 /* nop — sll $0, $0, 0 */
-#define nop  shift_lleft(rdiscard, rdiscard, 0)
+#define nop  shift_lleft(R_0, R_0, 0)
 #define nop2 nop, nop
 
 // li_s — load signed 16-bit immediate into GPR (addiu rt, $0, imm — sign-extends).

code/duffle/pad.atom.c

@@ -11,18 +11,18 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(pad_atom_c);
 
 #pragma region MACs (Mips Atom Components)
 
-FI_ Slice_MipsCode ac_pad_set_centered_axes(MipsAtomBuilder_R ab, U4 r_state, U4 r_scratch) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_centered_axes, ab, {
+FI_ Slice_MipsCode ac_pad_set_centered_axes(AtomBuilder_R ab, U4 r_state, U4 r_scratch) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_centered_axes, ab, {
     load_upper_i(r_scratch, (PadAxis_Centered_Word >> 16) & 0xFFFF),
     or_i_self(   r_scratch,  PadAxis_Centered_Word        & 0xFFFF),
     store_word(  r_scratch, r_state, O_(PadState,axes)),
 })
 
-FI_ Slice_MipsCode ac_pad_set_id_byte(MipsAtomBuilder_R ab, U1 r_state, U1 r_id, U1 id_value) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_id_byte, ab, {
+FI_ Slice_MipsCode ac_pad_set_id_byte(AtomBuilder_R ab, U1 r_state, U1 r_id, U1 id_value) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_id_byte, ab, {
     add_ui(    r_id, R_0, id_value),
     store_byte(r_id, r_state, O_(PadState,id)),
 })
 
-FI_ Slice_MipsCode ac_pad_set_status(MipsAtomBuilder_R ab, U4 r_tmp, U1 r_state, U4 pad_status) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_status, ab, {
+FI_ Slice_MipsCode ac_pad_set_status(AtomBuilder_R ab, U4 r_tmp, U1 r_state, U4 pad_status) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_set_status, ab, {
     add_ui(    r_tmp, R_0, pad_status),
     store_word(r_tmp, r_state, O_(PadState,status)),
 })
@@ -30,7 +30,7 @@ FI_ Slice_MipsCode ac_pad_set_status(MipsAtomBuilder_R ab, U4 r_tmp, U1 r_state,
 /* Invert r_buttons (active-low → active-high) and store to PadState.buttons.
  * r_buttons must already be loaded (the caller is responsible for filling the load-delay slot of
  * the preceding load_half_u with an instruction that doesn't read r_buttons). */
-FI_ Slice_MipsCode ac_pad_store_inverted_buttons(MipsAtomBuilder_R ab, U1 r_buttons, U1 r_pad_state) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_store_inverted_buttons, ab, {
+FI_ Slice_MipsCode ac_pad_store_inverted_buttons(AtomBuilder_R ab, U1 r_buttons, U1 r_pad_state) atom_dbg_skip MipsAtomComp_Proc_(ac_pad_store_inverted_buttons, ab, {
     nor_u(       r_buttons, r_buttons, R_0),
     store_half(  r_buttons, r_pad_state, O_(PadState,   buttons)),
 })

code/duffle/pad.c

@@ -36,12 +36,12 @@ NI_ void pad_bios_init_start(PadBiosRaw* raw0, PadBiosRaw* raw1)
 	 *   $t2 = 0xB0 (BIOS B-table address) */
 	asm volatile(
 		asm_words(
-			or_u(    rarg_2, rarg_1, rdiscard),               /* $a2 = $a1 = raw1 */
-			add_ui(  rarg_1, rdiscard, bios_pad_buffer_size), /* $a1 = 0x22 */
-			add_ui(  rarg_3, rdiscard, bios_pad_buffer_size), /* $a3 = 0x22 */
-			add_ui(  rtmp_1, rdiscard, bios_init_pad_2),      /* $t1 = 0x12 */
-			add_ui(  rtmp_2, rdiscard, bios_btable_addr),     /* $t2 = 0xB0 */
-			call_reg(rtmp_2),                                 /* jalr $t2, $ra */
+			or_u(    R_A2, R_A0, R_0),                 /* $a2 = $a1 = raw1 */
+			add_ui(  R_A1, R_0, bios_pad_buffer_size), /* $a1 = 0x22 */
+			add_ui(  R_A3, R_0, bios_pad_buffer_size), /* $a3 = 0x22 */
+			add_ui(  R_T1, R_0, bios_init_pad_2),      /* $t1 = 0x12 */
+			add_ui(  R_T2, R_0, bios_btable_addr),     /* $t2 = 0xB0 */
+			call_reg(R_T2),                            /* jalr $t2, $ra */
 			nop                                        /* BD slot */
 		)
 		asm_rpins, r_use(p0), r_use(p1)
@@ -62,9 +62,9 @@ NI_ void pad_bios_init_start(PadBiosRaw* raw0, PadBiosRaw* raw1)
 	/* B(13h) StartPAD2() — no args. The BIOS preserves $sp. */
 	asm volatile(
 		asm_words(
-			add_ui(  rtmp_1, rdiscard, bios_start_pad_2), /* $t1 = 0x13 */
-			add_ui(  rtmp_2, rdiscard, bios_btable_addr), /* $t2 = 0xB0 (re-load) */
-			call_reg(rtmp_2),                             /* jalr $t2, $ra */
+			add_ui(  R_T1, R_0, bios_start_pad_2), /* $t1 = 0x13 */
+			add_ui(  R_T2, R_0, bios_btable_addr), /* $t2 = 0xB0 (re-load) */
+			call_reg(R_T2),                             /* jalr $t2, $ra */
 			nop                                           /* BD slot */
 		)
 		asm_clobber:

code/duffle/word_count.metadata.h

@@ -15,6 +15,8 @@
 #define WORD_COUNT(name, count)  enum { words_##name = (count) };
 
 WORD_COUNT(nop,                              1)
+WORD_COUNT(atom_label,                        0)
+WORD_COUNT(atom_offset,                       0)
 WORD_COUNT(load_upper_i,                     1)
 WORD_COUNT(jump_reg,                         1)
 WORD_COUNT(jump_link,                        1)

code/hello_camera/gen/auto_reg.h

@@ -0,0 +1,13 @@
+#ifdef INTELLISENSE_DIRECTIVES
+#pragma once
+#endif
+// Auto-generated by ps1_meta.lua (passes/auto_reg.lua) — DO NOT EDIT
+// Directory: C:\projects\Pikuma\ps1\code\hello_camera
+//   source: C:/projects/Pikuma/ps1/code/hello_camera/hello_camera.c
+//   source: C:/projects/Pikuma/ps1/code/hello_camera/hello_camera.h
+//   source: C:/projects/Pikuma/ps1/code/hello_camera/hello_camera.atom.c
+// Per-phase register allocations resolved by the lua pass.
+// R_<Sym>_Code = <chosen GPR's _Code constant> for every marker in this directory.
+
+#define R_GpTmp_Code R_V0_Code
+

code/hello_camera/gen/macs.h

@@ -39,350 +39,3 @@ WORD_COUNT(mac_put_disp_env, 5)
 ,	mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port)
 WORD_COUNT(mac_put_draw_env, 16)
 
-#define mac_resolve_look_at__input_and_sub(...) \
-	load_word(r_target_ptr, R_TapePtr, O_(Binds_ResolveLookAtSub,target)) \
-,	load_word(r_eye_ptr,    R_TapePtr, O_(Binds_ResolveLookAtSub,eye)) \
-,	load_word(r_up_in_ptr,  R_TapePtr, O_(Binds_ResolveLookAtSub,up_in)) \
-,	add_ui_self(            R_TapePtr, S_(Binds_ResolveLookAtSub)) \
-,	load_word(r_scratch, R_TapePtr, O_(Binds_ResolveLookAtScratch,scratch_base)) \
-,	add_ui_self(         R_TapePtr, S_(Binds_ResolveLookAtScratch))	/* Stage eye.x/y/z into the scratchpad (atom 6 reads these for the translation
-	 * column). Reuse r_tmp0/r_tmp1/r_tmp2. Offsets via O_(ResolveLookAtScratch,*). */ \
-,	load_word(r_tmp0, r_eye_ptr, O_(P3_S4,x)) \
-,	load_word(r_tmp1, r_eye_ptr, O_(P3_S4,y)) \
-,	load_word(r_tmp2, r_eye_ptr, O_(P3_S4,z)) \
-,	nop /* load-delay */ \
-,	store_word(r_tmp0, r_scratch, O_(ResolveLookAtScratch,eye.x)) \
-,	store_word(r_tmp1, r_scratch, O_(ResolveLookAtScratch,eye.y)) \
-,	store_word(r_tmp2, r_scratch, O_(ResolveLookAtScratch,eye.z))	/* Stage up_in.x/y/z into the scratchpad (atom 2 reads these for the outer
-	 * product with uz). Reuse r_tmp0/r_tmp1/r_tmp2. */ \
-,	load_word(r_tmp0, r_up_in_ptr, O_(V3_S4,x)) \
-,	load_word(r_tmp1, r_up_in_ptr, O_(V3_S4,y)) \
-,	load_word(r_tmp2, r_up_in_ptr, O_(V3_S4,z)) \
-,	nop /* load-delay */ \
-,	store_word(r_tmp0, r_scratch, O_(ResolveLookAtScratch,up_in.x)) \
-,	store_word(r_tmp1, r_scratch, O_(ResolveLookAtScratch,up_in.y)) \
-,	store_word(r_tmp2, r_scratch, O_(ResolveLookAtScratch,up_in.z))	/* Compute fwd = target - eye. */ \
-,	load_word(r_tmp0, r_target_ptr, O_(P3_S4,x)) \
-,	load_word(r_tmp1, r_target_ptr, O_(P3_S4,y)) \
-,	load_word(r_tmp2, r_target_ptr, O_(P3_S4,z)) \
-,	load_word(r_tmp3, r_eye_ptr,    O_(P3_S4,x)) \
-,	load_word(R_AT,   r_eye_ptr,    O_(P3_S4,y)) \
-,	load_word(R_V0,   r_eye_ptr,    O_(P3_S4,z)) \
-,	nop /* load-delay */ \
-,	sub_u(r_tmp0, r_tmp0, r_tmp3) \
-,	sub_u(r_tmp1, r_tmp1, R_AT) \
-,	sub_u(r_tmp2, r_tmp2, R_V0)	/* Store fwd.x/y/z (atom 1 reads these as the normalize src). */ \
-,	store_word(r_tmp0, r_scratch, O_(ResolveLookAtScratch,fwd.x)) \
-,	store_word(r_tmp1, r_scratch, O_(ResolveLookAtScratch,fwd.y)) \
-,	store_word(r_tmp2, r_scratch, O_(ResolveLookAtScratch,fwd.z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__input_and_sub, 34)
-
-#define mac_resolve_look_at__cross_uz_up_in_to_right(...) \
-	add_si(r_g, r_scratch, O_(ResolveLookAtScratch,uz))       /* r_g = &uz */ \
-,	add_si(r_h, r_scratch, O_(ResolveLookAtScratch,up_in))    /* r_h = &up_in */ \
-,	add_si(r_f, r_scratch, O_(ResolveLookAtScratch,right))    /* r_f = &right (out) */ \
-,	nop	/* Load a (uz).x/y/z into r_a/r_b/r_c. */ \
-,	load_word(r_a, r_g, O_(V3_S4,x)) \
-,	load_word(r_b, r_g, O_(V3_S4,y)) \
-,	load_word(r_c, r_g, O_(V3_S4,z)) \
-,	nop	/* Load b (up_in).x/y/z into r_d + R_AT/R_V0 (hardcoded; reusing the
-	 * body's last two loads is fine because the load-delay slot is the nop
-	 * after the third load, and mtc2 below doesn't read these regs). */ \
-,	load_word(r_d,  r_h, O_(V3_S4,x)) \
-,	load_word(R_AT, r_h, O_(V3_S4,y)) \
-,	load_word(R_V0, r_h, O_(V3_S4,z)) \
-,	nop	/* mtc2 a → IR1/2/3, b → D1/2/3 (VXY0/VZ0/VXY1). */ \
-,	gte_mv_to_data_r(r_a,  C2_IR1) \
-,	gte_mv_to_data_r(r_b,  C2_IR2) \
-,	gte_mv_to_data_r(r_c,  C2_IR3) \
-,	gte_mv_to_data_r(r_d,  C2_VXY0)   /* D1 = b.x */ \
-,	gte_mv_to_data_r(R_AT, C2_VZ0)    /* D2 = b.y */ \
-,	gte_mv_to_data_r(R_V0, C2_VXY1)   /* D3 = b.z */ \
-,	nop2  /* MTC2 retirement (CPU→COP2 2-slot delay) */ \
-,	gte_cmdw_outer_product  /* OP fires; MAC1/2/3 = a × b */	/* mfc2 MAC1/2/3 → r_a/r_b/r_c (out.x/y/z). */ \
-,	gte_mv_from_data_r(r_a, C2_MAC1) \
-,	gte_mv_from_data_r(r_b, C2_MAC2) \
-,	gte_mv_from_data_r(r_c, C2_MAC3) \
-,	nop  /* MFC2 retirement */	/* Store out.x/y/z to r_f (out ptr = scratch+32). */ \
-,	store_word(r_a, r_f, O_(V3_S4,x)) \
-,	store_word(r_b, r_f, O_(V3_S4,y)) \
-,	store_word(r_c, r_f, O_(V3_S4,z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__cross_uz_up_in_to_right, 29)
-
-#define mac_resolve_look_at__cross_uz_ux_to_up(...) \
-	add_si(r_g, r_scratch, O_(ResolveLookAtScratch,uz))       /* r_g = &uz */ \
-,	add_si(r_h, r_scratch, O_(ResolveLookAtScratch,ux))       /* r_h = &ux */ \
-,	add_si(r_f, r_scratch, O_(ResolveLookAtScratch,up))       /* r_f = &up (out) */ \
-,	nop	/* Load a (uz).x/y/z into r_a/r_b/r_c. */ \
-,	load_word(r_a, r_g, O_(V3_S4,x)) \
-,	load_word(r_b, r_g, O_(V3_S4,y)) \
-,	load_word(r_c, r_g, O_(V3_S4,z)) \
-,	nop	/* Load b (ux).x/y/z into r_d + R_AT/R_V0. */ \
-,	load_word(r_d,  r_h, O_(V3_S4,x)) \
-,	load_word(R_AT, r_h, O_(V3_S4,y)) \
-,	load_word(R_V0, r_h, O_(V3_S4,z)) \
-,	nop	/* mtc2 a → IR1/2/3, b → D1/2/3 (VXY0/VZ0/VXY1). */ \
-,	gte_mv_to_data_r(r_a,  C2_IR1) \
-,	gte_mv_to_data_r(r_b,  C2_IR2) \
-,	gte_mv_to_data_r(r_c,  C2_IR3) \
-,	gte_mv_to_data_r(r_d,  C2_VXY0) \
-,	gte_mv_to_data_r(R_AT, C2_VZ0) \
-,	gte_mv_to_data_r(R_V0, C2_VXY1) \
-,	nop2 \
-,	gte_cmdw_outer_product \
-,	gte_mv_from_data_r(r_a, C2_MAC1) \
-,	gte_mv_from_data_r(r_b, C2_MAC2) \
-,	gte_mv_from_data_r(r_c, C2_MAC3) \
-,	nop \
-,	store_word(r_a, r_f, O_(V3_S4,x)) \
-,	store_word(r_b, r_f, O_(V3_S4,y)) \
-,	store_word(r_c, r_f, O_(V3_S4,z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__cross_uz_ux_to_up, 29)
-
-#define mac_resolve_look_at__normalize_fwd_to_uz(...) \
-	add_si(r_a, r_scratch, O_(ResolveLookAtScratch,fwd))     /* r_a = &fwd */ \
-,	add_si(r_b, r_scratch, O_(ResolveLookAtScratch,uz))      /* r_b = &uz  */ \
-,	nop	/* Load src.x/y/z from r_a into r_e/r_f/r_i. */ \
-,	load_word(r_e, r_a, O_(V3_S4,x)) \
-,	load_word(r_f, r_a, O_(V3_S4,y)) \
-,	load_word(r_i, r_a, O_(V3_S4,z)) \
-,	nop /* load-delay */	/* Stage 1: mtc2 src → IR1/2/3, SQR fires. */ \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop \
-,	gte_cmdw_sqr	/* Stage 2: mfc2 MAC1/2/3, sum, mtc2 LZCS. */ \
-,	gte_mv_from_data_r(r_d,         C2_MAC1) \
-,	gte_mv_from_data_r(r_g,         C2_MAC2) \
-,	gte_mv_from_data_r(r_recip_est, C2_MAC3) \
-,	nop \
-,	add_u(r_recip_est, r_recip_est, r_g) \
-,	add_u(r_recip_est, r_recip_est, r_d) \
-,	gte_mv_to_data_r(r_recip_est, C2_LZCS) \
-,	nop2 \
-,	gte_mv_from_data_r(r_h, C2_LZCR) \
-,	nop	/* Stage 3: compute shift amount, align |v|² to bit 24. */ \
-,	and_i(   r_h, r_h, -2) \
-,	li_s(    r_shift, 31) \
-,	sub_s(   r_shift, r_shift, r_h) \
-,	shift_aright(r_shift, r_shift, 1) \
-,	add_si(  r_a, r_h, -24)                 /* r_a = LZCR - 24 (overlapping with r_recip_est; src ptr no longer needed) */ \
-,	branch_lt_zero(r_a, atom_offset(srav_path_fwd_to_uz, aligned_done_fwd_to_uz)) \
-,	nop \
-,	jump_rel(atom_offset(aligned_done_fwd_to_uz, srav_path_fwd_to_uz)) \
-,	shift_lleft_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(srav_path_fwd_to_uz) \
-,	li_s(    r_a, 24) \
-,	sub_s(   r_a, r_a, r_h) \
-,	shift_aright_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(aligned_done_fwd_to_uz)	/* r_recip_est holds |v|² aligned to bit 24. */ \
-,	add_si(  r_recip_est, r_recip_est, -64) \
-,	shift_lleft(r_recip_est, r_recip_est, 1) \
-,	load_upper_i(r_a, u4_hi(& gte_normalize_sqr_tbl)) \
-,	or_i_self(r_a, u4_lo(& gte_normalize_sqr_tbl)) \
-,	add_u(r_a, r_a, r_recip_est) \
-,	load_half(r_recip_est, r_a, 0) \
-,	nop	/* Stage 4: GPF + srav finalize. */ \
-,	gte_mv_to_data_r(r_recip_est, C2_IR0) \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop2 \
-,	gte_cmdw_gpf \
-,	gte_mv_from_data_r(r_e, C2_MAC1) \
-,	gte_mv_from_data_r(r_f, C2_MAC2) \
-,	gte_mv_from_data_r(r_i, C2_MAC3) \
-,	shift_aright_var(r_e, r_e, r_shift) \
-,	shift_aright_var(r_f, r_f, r_shift) \
-,	shift_aright_var(r_i, r_i, r_shift)	/* Store result.x/y/z to r_b (dst ptr = scratch+16). */ \
-,	store_word(r_e, r_b, O_(V3_S4,x)) \
-,	store_word(r_f, r_b, O_(V3_S4,y)) \
-,	store_word(r_i, r_b, O_(V3_S4,z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__normalize_fwd_to_uz, 59)
-
-#define mac_resolve_look_at__normalize_right_to_ux(...) \
-	add_si(r_a, r_scratch, O_(ResolveLookAtScratch,right))    /* r_a = &right */ \
-,	add_si(r_b, r_scratch, O_(ResolveLookAtScratch,ux))       /* r_b = &ux    */ \
-,	nop \
-,	load_word(r_e, r_a, O_(V3_S4,x)) \
-,	load_word(r_f, r_a, O_(V3_S4,y)) \
-,	load_word(r_i, r_a, O_(V3_S4,z)) \
-,	nop \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop \
-,	gte_cmdw_sqr \
-,	gte_mv_from_data_r(r_d,         C2_MAC1) \
-,	gte_mv_from_data_r(r_g,         C2_MAC2) \
-,	gte_mv_from_data_r(r_recip_est, C2_MAC3) \
-,	nop \
-,	add_u(r_recip_est, r_recip_est, r_g) \
-,	add_u(r_recip_est, r_recip_est, r_d) \
-,	gte_mv_to_data_r(r_recip_est, C2_LZCS) \
-,	nop2 \
-,	gte_mv_from_data_r(r_h, C2_LZCR) \
-,	nop \
-,	and_i(   r_h, r_h, -2) \
-,	li_s(    r_shift, 31) \
-,	sub_s(   r_shift, r_shift, r_h) \
-,	shift_aright(r_shift, r_shift, 1) \
-,	add_si(  r_a, r_h, -24) \
-,	branch_lt_zero(r_a, atom_offset(srav_path_right_to_ux, aligned_done_right_to_ux)) \
-,	nop \
-,	jump_rel(atom_offset(aligned_done_right_to_ux, srav_path_right_to_ux)) \
-,	shift_lleft_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(srav_path_right_to_ux) \
-,	li_s(    r_a, 24) \
-,	sub_s(   r_a, r_a, r_h) \
-,	shift_aright_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(aligned_done_right_to_ux) \
-,	add_si(  r_recip_est, r_recip_est, -64) \
-,	shift_lleft(r_recip_est, r_recip_est, 1) \
-,	load_upper_i(r_a, u4_hi(& gte_normalize_sqr_tbl)) \
-,	or_i_self(r_a, u4_lo(& gte_normalize_sqr_tbl)) \
-,	add_u(r_a, r_a, r_recip_est) \
-,	load_half(r_recip_est, r_a, 0) \
-,	nop \
-,	gte_mv_to_data_r(r_recip_est, C2_IR0) \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop2 \
-,	gte_cmdw_gpf \
-,	gte_mv_from_data_r(r_e, C2_MAC1) \
-,	gte_mv_from_data_r(r_f, C2_MAC2) \
-,	gte_mv_from_data_r(r_i, C2_MAC3) \
-,	shift_aright_var(r_e, r_e, r_shift) \
-,	shift_aright_var(r_f, r_f, r_shift) \
-,	shift_aright_var(r_i, r_i, r_shift) \
-,	store_word(r_e, r_b, O_(V3_S4,x)) \
-,	store_word(r_f, r_b, O_(V3_S4,y)) \
-,	store_word(r_i, r_b, O_(V3_S4,z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__normalize_right_to_ux, 59)
-
-#define mac_resolve_look_at__normalize_up_to_uy(...) \
-	add_si(r_a, r_scratch, O_(ResolveLookAtScratch,up))       /* r_a = &up */ \
-,	add_si(r_b, r_scratch, O_(ResolveLookAtScratch,uy))       /* r_b = &uy */ \
-,	nop \
-,	load_word(r_e, r_a, O_(V3_S4,x)) \
-,	load_word(r_f, r_a, O_(V3_S4,y)) \
-,	load_word(r_i, r_a, O_(V3_S4,z)) \
-,	nop \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop \
-,	gte_cmdw_sqr \
-,	gte_mv_from_data_r(r_d,         C2_MAC1) \
-,	gte_mv_from_data_r(r_g,         C2_MAC2) \
-,	gte_mv_from_data_r(r_recip_est, C2_MAC3) \
-,	nop \
-,	add_u(r_recip_est, r_recip_est, r_g) \
-,	add_u(r_recip_est, r_recip_est, r_d) \
-,	gte_mv_to_data_r(r_recip_est, C2_LZCS) \
-,	nop2 \
-,	gte_mv_from_data_r(r_h, C2_LZCR) \
-,	nop \
-,	and_i(   r_h, r_h, -2) \
-,	li_s(    r_shift, 31) \
-,	sub_s(   r_shift, r_shift, r_h) \
-,	shift_aright(r_shift, r_shift, 1) \
-,	add_si(  r_a, r_h, -24) \
-,	branch_lt_zero(r_a, atom_offset(srav_path_up_to_uy, aligned_done_up_to_uy)) \
-,	nop \
-,	jump_rel(atom_offset(aligned_done_up_to_uy, srav_path_up_to_uy)) \
-,	shift_lleft_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(srav_path_up_to_uy) \
-,	li_s(    r_a, 24) \
-,	sub_s(   r_a, r_a, r_h) \
-,	shift_aright_var(r_recip_est, r_recip_est, r_a) \
-,	atom_label(aligned_done_up_to_uy) \
-,	add_si(  r_recip_est, r_recip_est, -64) \
-,	shift_lleft(r_recip_est, r_recip_est, 1) \
-,	load_upper_i(r_a, u4_hi(& gte_normalize_sqr_tbl)) \
-,	or_i_self(r_a, u4_lo(& gte_normalize_sqr_tbl)) \
-,	add_u(r_a, r_a, r_recip_est) \
-,	load_half(r_recip_est, r_a, 0) \
-,	nop \
-,	gte_mv_to_data_r(r_recip_est, C2_IR0) \
-,	gte_mv_to_data_r(r_e, C2_IR1) \
-,	gte_mv_to_data_r(r_f, C2_IR2) \
-,	gte_mv_to_data_r(r_i, C2_IR3) \
-,	nop2 \
-,	gte_cmdw_gpf \
-,	gte_mv_from_data_r(r_e, C2_MAC1) \
-,	gte_mv_from_data_r(r_f, C2_MAC2) \
-,	gte_mv_from_data_r(r_i, C2_MAC3) \
-,	shift_aright_var(r_e, r_e, r_shift) \
-,	shift_aright_var(r_f, r_f, r_shift) \
-,	shift_aright_var(r_i, r_i, r_shift) \
-,	store_word(r_e, r_b, O_(V3_S4,x)) \
-,	store_word(r_f, r_b, O_(V3_S4,y)) \
-,	store_word(r_i, r_b, O_(V3_S4,z)) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__normalize_up_to_uy, 59)
-
-#define mac_resolve_look_at__populate_and_translate(...) \
-	load_word(r_look_at, R_TapePtr, O_(Binds_ResolveLookAtPopAndTrans,look_at)) \
-,	add_ui_self(         R_TapePtr, S_(Binds_ResolveLookAtPopAndTrans))	/* Compute the 4 scratch pointers in their dedicated GPRs. */ \
-,	add_si(r_pux,  r_scratch, O_(ResolveLookAtScratch,ux))       /* r_pux  = &ux  */ \
-,	add_si(r_puy,  r_scratch, O_(ResolveLookAtScratch,uy))       /* r_puy  = &uy  */ \
-,	add_si(r_puz,  r_scratch, O_(ResolveLookAtScratch,uz))       /* r_puz  = &uz  */ \
-,	add_si(r_peye, r_scratch, O_(ResolveLookAtScratch,eye))      /* r_peye = &eye */ \
-,	nop	/* ── m[0] = (S2)ux ── */ \
-,	load_word(r_tmp0, r_pux, O_(V3_S4,x)) \
-,	load_word(r_tmp1, r_pux, O_(V3_S4,y)) \
-,	load_word(r_tmp2, r_pux, O_(V3_S4,z)) \
-,	nop \
-,	store_half(r_tmp0, r_look_at, O_(MT3_S2S4,m[0][0])) \
-,	store_half(r_tmp1, r_look_at, O_(MT3_S2S4,m[0][1])) \
-,	store_half(r_tmp2, r_look_at, O_(MT3_S2S4,m[0][2]))	/* ── m[1] = (S2)uy ── */ \
-,	load_word(r_tmp0, r_puy, O_(V3_S4,x)) \
-,	load_word(r_tmp1, r_puy, O_(V3_S4,y)) \
-,	load_word(r_tmp2, r_puy, O_(V3_S4,z)) \
-,	nop \
-,	store_half(r_tmp0, r_look_at, O_(MT3_S2S4,m[1][0])) \
-,	store_half(r_tmp1, r_look_at, O_(MT3_S2S4,m[1][1])) \
-,	store_half(r_tmp2, r_look_at, O_(MT3_S2S4,m[1][2]))	/* ── m[2] = (S2)uz ── */ \
-,	load_word(r_tmp0, r_puz, O_(V3_S4,x)) \
-,	load_word(r_tmp1, r_puz, O_(V3_S4,y)) \
-,	load_word(r_tmp2, r_puz, O_(V3_S4,z)) \
-,	nop \
-,	store_half(r_tmp0, r_look_at, O_(MT3_S2S4,m[2][0])) \
-,	store_half(r_tmp1, r_look_at, O_(MT3_S2S4,m[2][1])) \
-,	store_half(r_tmp2, r_look_at, O_(MT3_S2S4,m[2][2]))	/* ── Translation column t[i] = R * (-eye) ─────────────────────────────
-	 * pos = -eye: load eye.x/y/z from r_peye, negate via sub_u from R_0. */ \
-,	load_word(r_tmp0, r_peye, O_(P3_S4,x)) \
-,	load_word(r_tmp1, r_peye, O_(P3_S4,y)) \
-,	load_word(r_tmp2, r_peye, O_(P3_S4,z)) \
-,	nop \
-,	sub_u(r_tmp0, R_0, r_tmp0)  /* pos.x = -eye.x */ \
-,	sub_u(r_tmp1, R_0, r_tmp1) \
-,	sub_u(r_tmp2, R_0, r_tmp2)	/* mtc2 IR1/2/3 = pos (for MVMVA — input vector registers). */ \
-,	gte_mv_to_data_r(r_tmp0, C2_IR1) \
-,	gte_mv_to_data_r(r_tmp1, C2_IR2) \
-,	gte_mv_to_data_r(r_tmp2, C2_IR3) \
-,	nop2	/* MVMVA: MAC1/2/3 = R * IR with cv=0 (no TR vector), mx=0 (rotation matrix),
-	 * sf=0 (no shift), v=0 (V0 = IR1/2/3, no far-plane clipping). The pre-set
-	 * rotation matrix is the one set by the preceding set_gte_world atom.
-	 * gte_cmdw_mvmva is parameterless and defaults to cv=0/mx=0/sf=0/v=0. */ \
-,	gte_cmdw_mvmva \
-,	nop  /* GTE interlock */	/* mfc2 MAC1/2/3 → r_tmp0/r_tmp1/r_tmp2 (sign-extended into 32-bit GPRs).
-	 * MAC1/2/3 hold R*v with no TR add and no perspective divide — exactly the
-	 * 3 distinct world-space translation values we need for t[0..2]. */ \
-,	gte_mv_from_data_r(r_tmp0, C2_MAC1) \
-,	gte_mv_from_data_r(r_tmp1, C2_MAC2) \
-,	gte_mv_from_data_r(r_tmp2, C2_MAC3) \
-,	nop \
-,	store_word(r_tmp0, r_look_at, O_(MT3_S2S4,t[0])) \
-,	store_word(r_tmp1, r_look_at, O_(MT3_S2S4,t[1])) \
-,	store_word(r_tmp2, r_look_at, O_(MT3_S2S4,t[2])) \
-,	mac_yield()
-WORD_COUNT(mac_resolve_look_at__populate_and_translate, 50)
-

code/hello_camera/gen/offsets.h

@@ -8,36 +8,6 @@
 #pragma region hello_camera
 
 
-// --- atom: resolve_look_at__normalize_fwd_to_uz (62 words) ---
-
-#define _atom_offset_srav_path_fwd_to_uz_aligned_done_fwd_to_uz  6
-#define _atom_offset_aligned_done_fwd_to_uz_srav_path_fwd_to_uz  1
-
-enum {
-    atom_offset_srav_path_fwd_to_uz_aligned_done_fwd_to_uz = _atom_offset_srav_path_fwd_to_uz_aligned_done_fwd_to_uz,
-    atom_offset_aligned_done_fwd_to_uz_srav_path_fwd_to_uz = _atom_offset_aligned_done_fwd_to_uz_srav_path_fwd_to_uz,
-};
-
-// --- atom: resolve_look_at__normalize_right_to_ux (62 words) ---
-
-#define _atom_offset_srav_path_right_to_ux_aligned_done_right_to_ux  6
-#define _atom_offset_aligned_done_right_to_ux_srav_path_right_to_ux  1
-
-enum {
-    atom_offset_srav_path_right_to_ux_aligned_done_right_to_ux = _atom_offset_srav_path_right_to_ux_aligned_done_right_to_ux,
-    atom_offset_aligned_done_right_to_ux_srav_path_right_to_ux = _atom_offset_aligned_done_right_to_ux_srav_path_right_to_ux,
-};
-
-// --- atom: resolve_look_at__normalize_up_to_uy (62 words) ---
-
-#define _atom_offset_srav_path_up_to_uy_aligned_done_up_to_uy  6
-#define _atom_offset_aligned_done_up_to_uy_srav_path_up_to_uy  1
-
-enum {
-    atom_offset_srav_path_up_to_uy_aligned_done_up_to_uy = _atom_offset_srav_path_up_to_uy_aligned_done_up_to_uy,
-    atom_offset_aligned_done_up_to_uy_srav_path_up_to_uy = _atom_offset_aligned_done_up_to_uy_srav_path_up_to_uy,
-};
-
 // --- atom: pad_input_cube_rotation (60 words) ---
 
 #define _atom_offset_dpad_left_exit_dpad_left         6

code/hello_camera/hello_camera.c

@@ -43,6 +43,7 @@
 #pragma region Hello Camera Headers
 #	include "gen/macs.h"
 #	include "gen/offsets.h"
+#	include "gen/auto_reg.h"
 
 #include "hello_camera.h"
 #pragma endregion Hello Camera Headers
@@ -51,10 +52,16 @@
 #include "hello_camera.atom.c"
 #pragma endregion Hello Joypad TUs
 
+enum {
+	Scratchpad_Loc = 0x1F800000,
+};
+#define C_scratch(type) C_(type, Scratchpad_Loc)
+
 enum {
 	Scratchpad_Len           = 1024,
 	MemTape_Len              = 512,
-	ResolveLookAtArena_Words = 512,
+	ResolveLookAtArena_Words = 1024,
+	ResolveLookAtArena_Size  = ResolveLookAtArena_Words * S_(MipsCode),
 };
 typedef Struct_(SMemory) {
 	PrimitiveArena          primitives;
@@ -75,18 +82,11 @@ typedef Struct_(SMemory) {
 	PadBiosRaw pad_raw[2];
 	PadState   pad[2];
 
+	// TODO(Ed): We don't need this we can just cast at any point an address to a desired view of scratchpad, we have the address.
 	U4_V scratchpad; // d-cache
 
-	/* resolve_look_at bundle: pre-built atom arena + atom-refs.
-	 * (Task 12.5 fix: moved from file-scope globals to smem fields.
-	 *  Task 12.7 fix: dropped the ResolveLookAtScratch struct-as-view; the
-	 *  C-side helper uses `& smem.scratchpad[N]` at hardcoded offsets directly.
-	 *  Task 12.8 fix: chain atoms use r_scratch + offset internally; no C-side magic offsets anywhere.
-	 *  Task 12.11 fix: ResolveLookAtScratch offset schema moved to hello_camera.atom.c — gte.atom.c
-	 *  is the GENERIC GTE primitives file and must not know about the resolve_look_at bundle's scratch layout.) */
-	U4              resolve_look_at_arena[ResolveLookAtArena_Words]; /* ~2 KB; bumped from 420 per Task 4 subagent */
-	MipsAtom*       resolve_look_at_atom_addrs[7];
-	MipsAtomBuilder resolve_look_at_ab_static;
+	U1        resolve_look_at_mem[ResolveLookAtArena_Size];
+	MipsAtom* resolve_look_at_atom_addrs[10];
 };
 global SMemory smem;
 extern SMemory smem;
@@ -104,8 +104,7 @@ I_ B1* prim__alloc(U4 type_width, Str8 type_name) {
 }
 #define prim_alloc(type) (type*)prim__alloc(S_(type), slit( stringify(type)))
 
-void
-resolve_look_at_c11(MT3_S2S4* look_at, P3_S4* eye, P3_S4* target, V3_S4* up_in) {
+I_ void resolve_look_at_c11(MT3_S2S4* look_at, P3_S4* eye, P3_S4* target, V3_S4* up_in) {
 // RGA(Lengyel): Build matrix expansion of a rigid transformation. Corresponding motor is not constructed; we write the LA form for GTE.
 // Preconditions: eye != target, up_in not collinear with (target - eye).
 	V3_S4 right, up, forward;
@@ -130,118 +129,243 @@ resolve_look_at_c11(MT3_S2S4* look_at, P3_S4* eye, P3_S4* target, V3_S4* up_in)
 	mul_m3s2_v3s4(look_at, & pos, & off);
 	trans_m3s2(   look_at,        & off);
 }
+FI_ void camera_look_at_c11(Camera* c, P3_S4* target, V3_S4* up_in) { resolve_look_at_c11(& c->look_at, & c->pos, target, up_in); }
 
 /* Pre-build all 7 chain atoms of the resolve_look_at bundle into the static arena.
  * Called ONCE from main() before the frame loop.
  * After this returns, the smem.resolve_look_at_atom_addrs[] array contains valid MIPS atom pointers
  * for the frame-time bundle helper to emit via tb_emit(tb, captured_addr).
  *
- * 7 atoms are within hello_camera.atom.c:
+ * 4 unique procs in hello_camera.atom.c (chain atoms 0, 2, 4, 6); atoms 1, 3, 5
+ * share the GENERIC normalize_v3s4_proc from gte.atom.c (called 3x with different
+ * O_(ResolveLookAtScratch,...) offsets):
  * 	0: resolve_look_at__input_and_sub_proc
- * 	1: resolve_look_at__normalize_fwd_to_uz_proc
+ * 	1: normalize_v3s4_proc                  (fwd → uz; offsets 0, 16)
  * 	2: resolve_look_at__cross_uz_up_in_to_right_proc
- * 	3: resolve_look_at__normalize_right_to_ux_proc
+ * 	3: normalize_v3s4_proc                  (right → ux; offsets 32, 48)
  * 	4: resolve_look_at__cross_uz_ux_to_up_proc
- * 	5: resolve_look_at__normalize_up_to_uy_proc
+ * 	5: normalize_v3s4_proc                  (up → uy; offsets 64, 80)
  * 	6: resolve_look_at__populate_and_translate_proc
  *
- * (gte.atom.c contains only normalize_v3s4_proc — bundle-specific scratch layout is no longer exposed to the GTE primitives file.)
+ * Task 12.16 promotion: the bundle-specific resolve_look_at__chain_normalize_proc
+ * has been promoted to the generic normalize_v3s4_proc (gte.atom.c), which now
+ * takes r_scratch + r_src_offset + r_dst_offset as U4 parameters. The 3 callers
+ * pass O_(ResolveLookAtScratch,...) macros as offset args. The metaprogram emits
+ * one set of `atom_offset__normalize_v3s4__srav_path__aligned_done` defs
+ * (namespaced by atom name) in duffle/gen/offsets.h, shared by all 3 callers.
  *
  * GPR pool per atom: 10 free GPRs (R_T0..R_T3 + R_T5..R_T7 + R_V0 + R_V1 + R_AT).
  * R_T4 is reserved as the wave-context carrier (R_ResolveScratch).
  */
+/* === EXPLICIT REGISTER ALLOCATION TRACKER ===
+ * Every GPR used by every atom is tracked below. NO GPR is assigned to
+ * two atoms at overlapping lifetimes. The tape runtime preserves R_T8/R_T9
+ * (R_AtomJmp/R_TapePtr) and clobbers R_T0-R_T7, R_AT, R_V0, R_V1.
+ * R_T4 is reserved as R_ResolveScratch (wave-context carrier).
+ *
+ * GPR pool: R_T0($8), R_T1($9), R_T2($10), R_T3($11), R_T5($13),
+ *           R_T6($14), R_T7($15), R_V0($2), R_V1($3), R_AT($1)
+ * Reserved: R_T4($12) = R_ResolveScratch
+ * Tape: R_T8($24) = R_AtomJmp, R_T9($25) = R_TapePtr (preserved)
+ *
+ * === ATOM 0: input_and_sub (stages eye/up_in, computes fwd) ===
+ * Pop tape → R_T0(target), R_T1(eye), R_T2(up_in).
+ * Use R_T3,R_T5,R_T6,R_T7 as temps.
+ * NO conflict with other atoms (each atom has independent lifetime).
+ *
+ * === ATOM 1: normalize fwd→uz ===
+ * r_src_offset=0, r_dst_offset=16.
+ * r_src_ptr=R_T0, r_dst_ptr=R_T1, r_tmp=R_T2 (preserved for stage 4).
+ * r_mac1=R_T3, r_mac2=R_T5, r_recip=R_T6, r_lzcr=R_T7, r_shift=R_V0, r_branch=R_V1.
+ *
+ * === ATOM 2: cross uz×up_in→right ===
+ * r_a=R_T0, r_b=R_T1, r_c=R_T2, r_d=R_T3, r_f(out)=R_T5, r_g=R_T6, r_h=R_T7.
+ *
+ * === ATOM 3: normalize right→ux ===
+ * Same GPR pool as atom 1.
+ *
+ * === ATOM 4: cross uz×ux→up ===
+ * r_a=R_T0, r_b=R_T1, r_c=R_T2, r_d=R_T3, r_f(out)=R_T5, r_g=R_T6, r_h=R_T7.
+ *
+ * === ATOM 5: normalize up→uy ===
+ * Same GPR pool as atom 1.
+ *
+ * === ATOM 6a: populate (m[][] from ux/uy/uz, t[]=0) ===
+ * r_look_at=R_T0 (pop tape), r_scratch=R_T4.
+ * r_pux=R_T1, r_puy=R_T3, r_puz=R_T5.
+ * r_tmp0=R_T2, r_tmp1=R_T6, r_tmp2=R_V0.
+ *
+ * === ATOM 6a.5: set_gte_mt3s2s4 (ctc2 RT matrix) ===
+ * BAKED atom. Uses R_T3 internally (hardcoded in gte.atom.c).
+ * NO conflict — different GPR pool, and the atom body hardcodes R_T3
+ * as the matrix pointer. We DON'T need to assign R_T3 to atom 6a.5
+ * because it's a baked atom with its own GPR usage.
+ *
+ * === ATOM 6b: matrix_vector (RT * (-eye) >> 12) ===
+ * r_look_at=R_T0 (pop tape), r_scratch=R_T4.
+ * r_peye=R_T1.
+ * r_tmp0=R_T2, r_tmp1=R_T3, r_tmp2=R_T5.
+ * Uses mac_apply_matrix_lv which internally uses these temps.
+ *
+ * === ATOM 6c: trans_matrix (off → look_at->t[]) ===
+ * r_look_at=R_T0 (pop tape), r_scratch=R_T4.
+ * r_off_ptr=R_T1.
+ * r_tmp0=R_T2.
+ *
+ * === CONFLICT CHECK ===
+ * All atoms use the same GPR pool R_T0-R_T3, R_T5-R_T7, R_V0-R_V1.
+ * But atoms are SEQUENTIAL — each atom's lifetime is disjoint from
+ * the next atom's lifetime. The tape yield handshake between atoms
+ * preserves R_TapePtr (R_T9) and R_AtomJmp (R_T8).
+ *
+ * The GPR pool is SHARED across atoms (they run sequentially, not
+ * concurrently). Each atom's build call assigns specific R_T* codes
+ * for that atom's body. The same R_T* code can be reused across atoms
+ * because the previous atom's body has already yielded.
+ */
 internal void resolve_look_at_init(void) {
 	/* Wrap the static arena in a MipsAtomBuilder. */
-	MipsAtomBuilder_R ab = & smem.resolve_look_at_ab_static;
-	ab->start    = u4_(smem.resolve_look_at_arena);
-	ab->capacity = ResolveLookAtArena_Words;
-	ab->used     = 0;
+	AtomArena ab = atomarena_make(slice_ut_arr(smem.resolve_look_at_mem));
 
-	/* Atom 0: resolve_look_at__input_and_sub — stages eye/up_in into scratchpad,
-	 * computes fwd = target - eye; binds R_ResolveScratch (R_T4) as the wave-context carrier for atoms 1-6.
-	 * The body hardcodes R_AT and R_V0 as eye.y/eye.z temps (the existing sub_u(eye.x, eye.y, eye.z) chain from the prior Task 12.7 design). */
-	smem.resolve_look_at_atom_addrs[0] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__input_and_sub_proc(ab,
-		R_T0,             /* r_target_ptr (popped from tape) */
-		R_T1,             /* r_eye_ptr    (popped from tape) */
-		R_T2,             /* r_up_in_ptr  (popped from tape) */
-		R_ResolveScratch, /* r_scratch (wave-context carrier; popped from tape) */
-		R_T3,             /* r_tmp0 */
-		R_T5,             /* r_tmp1 */
-		R_T6,             /* r_tmp2 */
-		R_T7);            /* r_tmp3 */
-
-	/* Atom 1: resolve_look_at__normalize_fwd_to_uz — src=scratch+0, dst=scratch+16 (HARDCODED in body).
-	 * GPR pool: r_scratch (R_T4 carrier) + 10 body GPRs = 11.
-	 *   r_a/r_b (R_T0/R_T1) : src/dst pointers (r_a overlaps r_recip_est after the loads)
-	 *   r_e/r_f/r_i (R_T2/R_T3/R_T5) : src.x/y/z → result.x/y/z
-	 *   r_d/r_g (R_T6/R_T7) : MAC1/2 scratch (dead after stage 2)
-	 *   r_h (R_V0) : LZCR
-	 *   r_recip_est (R_V1), r_shift (R_AT) : saved throughout */
-	smem.resolve_look_at_atom_addrs[1] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__normalize_fwd_to_uz_proc(ab,
-		R_ResolveScratch, /* r_scratch (wave-context carrier; src/dst base) */
-		R_T0, R_T1,       /* r_a, r_b (src/dst ptrs) */
-		R_T2, R_T3, R_T5, /* r_e, r_f, r_i (src components) */
-		R_T6, R_T7,       /* r_d, r_g (MAC scratch) */
-		R_V0,             /* r_h (LZCR) */
-		R_V1,             /* r_recip_est */
-		R_AT);            /* r_shift */
-
-	/* Atom 2: resolve_look_at__cross_uz_up_in_to_right — a=scratch+16, b=scratch+128,
-	 * out=scratch+32 (HARDCODED in body). GPR pool: r_scratch + 7 body + R_AT + R_V0 = 10. */
-	smem.resolve_look_at_atom_addrs[2] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__cross_uz_up_in_to_right_proc(ab,
-		R_ResolveScratch,   /* r_scratch (wave-context carrier; src/dst base) */
-		R_T0, R_T1, R_T2,   /* r_a, r_b, r_c (a.x/y/z → out.x/y/z) */
-		R_T3,               /* r_d (b.x) */
-		R_T5,               /* r_f (out ptr = scratch+32) */
-		R_T6,               /* r_g (a ptr = scratch+16) */
-		R_T7);              /* r_h (b ptr = scratch+128) */
-
-	/* Atom 3: resolve_look_at__normalize_right_to_ux — src=scratch+32, dst=scratch+48 (HARDCODED). */
-	smem.resolve_look_at_atom_addrs[3] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__normalize_right_to_ux_proc(ab,
+	/* === ATOM 0: input_and_sub === */
+	U4 const r_target_ptr = R_T0;  /* tape pop → target */
+	U4 const r_eye_ptr    = R_T1;  /* tape pop → eye */
+	U4 const r_up_in_ptr  = R_T2;  /* tape pop → up_in */
+	U4 const r_tmp0_0     = R_T3;
+	U4 const r_tmp1_0     = R_T5;
+	U4 const r_tmp2_0     = R_T6;
+	U4 const r_tmp3_0     = R_T7;
+	smem.resolve_look_at_atom_addrs[0] = resolve_look_at__input_and_sub_proc(& ab,
 		R_ResolveScratch,
-		R_T0, R_T1,
-		R_T2, R_T3, R_T5,
-		R_T6, R_T7,
-		R_V0,
-		R_V1,
-		R_AT);
+		r_target_ptr, r_eye_ptr, r_up_in_ptr,
+		r_tmp0_0, r_tmp1_0, r_tmp2_0, r_tmp3_0);
 
-	/* Atom 4: resolve_look_at__cross_uz_ux_to_up — a=scratch+16, b=scratch+48, out=scratch+64 (HARDCODED). */
-	smem.resolve_look_at_atom_addrs[4] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__cross_uz_ux_to_up_proc(ab,
+	/* === ATOM 1: normalize fwd→uz === */
+	U4 const r_src_offset_1  = O_(ResolveLookAtScratch, fwd);
+	U4 const r_dst_offset_1  = O_(ResolveLookAtScratch, uz);
+	U4 const r_src_ptr_1     = R_T0;
+	U4 const r_dst_ptr_1     = R_T1;
+	U4 const r_tmp_1         = R_T2;
+	U4 const r_mac1_1        = R_T3;
+	U4 const r_mac2_1        = R_T5;
+	U4 const r_recip_1       = R_T6;
+	U4 const r_lzcr_1        = R_T7;
+	U4 const r_shift_1       = R_V0;
+	U4 const r_branch_1      = R_V1;
+	smem.resolve_look_at_atom_addrs[1] = normalize_v3s4_proc(& ab,
 		R_ResolveScratch,
-		R_T0, R_T1, R_T2,
-		R_T3,
-		R_T5,  /* r_f (out ptr = scratch+64) */
-		R_T6,  /* r_g (a ptr = scratch+16) */
-		R_T7); /* r_h (b ptr = scratch+48) */
+		r_src_offset_1, r_dst_offset_1,
+		r_src_ptr_1, r_dst_ptr_1, r_tmp_1,
+		r_mac1_1, r_mac2_1, r_recip_1, r_lzcr_1,
+		r_shift_1, r_branch_1);
 
-	/* Atom 5: resolve_look_at__normalize_up_to_uy — src=scratch+64, dst=scratch+80 (HARDCODED). */
-	smem.resolve_look_at_atom_addrs[5] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__normalize_up_to_uy_proc(ab,
+	/* === ATOM 2: cross uz×up_in→right === */
+	U4 const r_a_2 = R_T0;
+	U4 const r_b_2 = R_T1;
+	U4 const r_c_2 = R_T2;
+	U4 const r_d_2 = R_T3;
+	U4 const r_f_2 = R_T5;  /* out ptr (HARDCODED in body: scratch+32) */
+	U4 const r_g_2 = R_T6;  /* a ptr = scratch+16 */
+	U4 const r_h_2 = R_T7;  /* b ptr = scratch+128 */
+	smem.resolve_look_at_atom_addrs[2] = resolve_look_at__cross_uz_up_in_to_right_proc(& ab,
 		R_ResolveScratch,
-		R_T0, R_T1,
-		R_T2, R_T3, R_T5,
-		R_T6, R_T7,
-		R_V0,
-		R_V1,
-		R_AT);
+		r_a_2, r_b_2, r_c_2, r_d_2, r_f_2, r_g_2, r_h_2);
 
-	/* Atom 6: resolve_look_at__populate_and_translate — write look_at->m[][] from ux/uy/uz (computed from r_scratch+offset internally),
-	then compute translation column t[] = R * (-eye). GPR pool: r_look_at + r_scratch + 4 ptr regs + 3 tmp regs = 9. */
-	smem.resolve_look_at_atom_addrs[6] = (MipsAtom*)u4_v(ab->start + ab->used * sizeof(U4));
-	resolve_look_at__populate_and_translate_proc(ab,
-		R_T0,                    /* r_look_at (popped from tape; MT3_S2S4*) */
-		R_ResolveScratch,        /* r_scratch (wave-context carrier) */
-		R_T1, R_T3, R_T5, R_T7,  /* r_pux, r_puy, r_puz, r_peye */
-		R_T2, R_T6, R_V0);       /* r_tmp0, r_tmp1, r_tmp2 */
+	/* === ATOM 3: normalize right→ux === */
+	U4 const r_src_offset_3  = O_(ResolveLookAtScratch, right);
+	U4 const r_dst_offset_3  = O_(ResolveLookAtScratch, ux);
+	U4 const r_src_ptr_3     = R_T0;
+	U4 const r_dst_ptr_3     = R_T1;
+	U4 const r_tmp_3         = R_T2;
+	U4 const r_mac1_3        = R_T3;
+	U4 const r_mac2_3        = R_T5;
+	U4 const r_recip_3       = R_T6;
+	U4 const r_lzcr_3        = R_T7;
+	U4 const r_shift_3       = R_V0;
+	U4 const r_branch_3      = R_V1;
+	smem.resolve_look_at_atom_addrs[3] = normalize_v3s4_proc(& ab,
+		R_ResolveScratch,
+		r_src_offset_3, r_dst_offset_3,
+		r_src_ptr_3, r_dst_ptr_3, r_tmp_3,
+		r_mac1_3, r_mac2_3, r_recip_3, r_lzcr_3,
+		r_shift_3, r_branch_3);
+
+	/* === ATOM 4: cross uz×ux→up === */
+	U4 const r_a_4 = R_T0;
+	U4 const r_b_4 = R_T1;
+	U4 const r_c_4 = R_T2;
+	U4 const r_d_4 = R_T3;
+	U4 const r_f_4 = R_T5;  /* out ptr (HARDCODED: scratch+64) */
+	U4 const r_g_4 = R_T6;  /* a ptr = scratch+16 */
+	U4 const r_h_4 = R_T7;  /* b ptr = scratch+48 */
+	smem.resolve_look_at_atom_addrs[4] = resolve_look_at__cross_uz_ux_to_up_proc(& ab,
+		R_ResolveScratch,
+		r_a_4, r_b_4, r_c_4, r_d_4, r_f_4, r_g_4, r_h_4);
+
+	/* === ATOM 5: normalize up→uy === */
+	U4 const r_src_offset_5  = O_(ResolveLookAtScratch, up);
+	U4 const r_dst_offset_5  = O_(ResolveLookAtScratch, uy);
+	U4 const r_src_ptr_5     = R_T0;
+	U4 const r_dst_ptr_5     = R_T1;
+	U4 const r_tmp_5         = R_T2;
+	U4 const r_mac1_5        = R_T3;
+	U4 const r_mac2_5        = R_T5;
+	U4 const r_recip_5       = R_T6;
+	U4 const r_lzcr_5        = R_T7;
+	U4 const r_shift_5       = R_V0;
+	U4 const r_branch_5      = R_V1;
+	smem.resolve_look_at_atom_addrs[5] = normalize_v3s4_proc(& ab,
+		R_ResolveScratch,
+		r_src_offset_5, r_dst_offset_5,
+		r_src_ptr_5, r_dst_ptr_5, r_tmp_5,
+		r_mac1_5, r_mac2_5, r_recip_5, r_lzcr_5,
+		r_shift_5, r_branch_5);
+
+	/* === ATOM 6a: populate (m[][] from ux/uy/uz, t[]=0) === */
+	U4 const r_look_at_6a = R_T0;  /* tape pop → look_at* */
+	U4 const r_scratch_6a = R_ResolveScratch;
+	U4 const r_pux_6a      = R_T1;
+	U4 const r_puy_6a      = R_T3;
+	U4 const r_puz_6a      = R_T5;
+	U4 const r_tmp0_6a     = R_T2;
+	U4 const r_tmp1_6a     = R_T6;
+	U4 const r_tmp2_6a     = R_V0;
+	smem.resolve_look_at_atom_addrs[6] = resolve_look_at__populate_proc(& ab,
+		r_look_at_6a, r_scratch_6a,
+		r_pux_6a, r_puy_6a, r_puz_6a,
+		r_tmp0_6a, r_tmp1_6a, r_tmp2_6a);
+
+	/* === ATOM 6a.5: set_gte_mt3s2s4 (BAKED — ctc2 RT matrix) ===
+	 * This is a BAKED atom from gte.atom.c. Its body hardcodes R_T3 as
+	 * the matrix pointer (popped from tape). It does NOT need GPR
+	 * assignment from us — it has its own internal GPR usage.
+	 * We just take its address. */
+	smem.resolve_look_at_atom_addrs[7] = (MipsAtom*) & set_gte_mt3s2s4;
+
+	/* === ATOM 6b: matrix_vector (RT * (-eye) >> 12) ===
+	 * Uses mac_apply_matrix_lv component macro which internally uses
+	 * r_t0 for the RT matrix load + V0 load, then r_t0/r_t1/r_t2
+	 * for the mfc2/store. We pass our GPRs. */
+	U4 const r_scratch_6b = R_ResolveScratch;
+	U4 const r_peye_6b    = R_T1;  /* scratch+96 (packed V0 dst, then off dst) */
+	U4 const r_look_at_6b = R_T0;  /* tape pop → look_at* */
+	U4 const r_tmp0_6b    = R_T2;
+	U4 const r_tmp1_6b    = R_T3;
+	U4 const r_tmp2_6b    = R_T5;
+	smem.resolve_look_at_atom_addrs[8] = resolve_look_at__matrix_vector_proc(& ab,
+		r_scratch_6b, r_peye_6b, r_look_at_6b,
+		r_tmp0_6b, r_tmp1_6b, r_tmp2_6b);
+
+	/* === ATOM 6c: trans_matrix (off → look_at->t[]) === */
+	U4 const r_look_at_6c = R_T0;  /* tape pop → look_at* */
+	U4 const r_scratch_6c = R_ResolveScratch;
+	U4 const r_off_ptr_6c = R_T1;  /* &scratch.eye (= off dst) */
+	U4 const r_tmp0_6c    = R_T2;
+	smem.resolve_look_at_atom_addrs[9] = resolve_look_at__trans_matrix_proc(& ab,
+		r_look_at_6c, r_scratch_6c, r_off_ptr_6c, r_tmp0_6c);
 
 	/* Sanity check: arena didn't overflow. */
-	assert(ab->used <= ResolveLookAtArena_Words);
+	assert(ab.used <= ResolveLookAtArena_Size);
 }
 
 /* Emit the resolve_look_at bundle into the tape. Called once per frame from update().
@@ -262,30 +386,33 @@ I_ void resolve_look_at(
 	,	P3_S4*    target
 	,	V3_S4*    up_in
 ){
-	/* Atom 0: input_and_sub — stages eye/up_in into scratchpad + computes fwd.  */
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[0]); {
-		tb_data(tb, u4_(target));              /* Binds_ResolveLookAtSub.target  (C-side P3_S4*) */
-		tb_data(tb, u4_(eye));                 /* Binds_ResolveLookAtSub.eye     (C-side P3_S4*) */
-		tb_data(tb, u4_(up_in));               /* Binds_ResolveLookAtSub.up_in   (C-side V3_S4*) */
-		tb_data(tb, u4_(smem.scratchpad));     /* Binds_ResolveLookAtScratch.scratch_base */
+		tb_data(tb, u4_(target));
+		tb_data(tb, u4_(eye));
+		tb_data(tb, u4_(up_in));
+		tb_data(tb, u4_(smem.scratchpad));
 	}
 
-	/* Atoms 1-5: NO tb_data — each chain atom uses r_scratch + hardcoded_offset internally (no tape-data pointers between atoms).
-	Context carrier R_ResolveScratch (R_T4) is preserved across atoms. */
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[1]); { }
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[2]); { }
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[3]); { }
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[4]); { }
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[5]); { }
 
-	/* Atom 6: populate_and_translate — only output pointer is the matrix destination. */
 	tb_emit(tb, smem.resolve_look_at_atom_addrs[6]); {
-		tb_data(tb, u4_(look_at)); /* Binds_ResolveLookAtPopAndTrans.look_at (MT3_S2S4*) */
+		tb_data(tb, u4_(look_at));
+	}
+	tb_emit(tb, smem.resolve_look_at_atom_addrs[7]); {
+		tb_data(tb, u4_(look_at));
+	}
+	tb_emit(tb, smem.resolve_look_at_atom_addrs[8]); {
+		tb_data(tb, u4_(look_at));
+	}
+	tb_emit(tb, smem.resolve_look_at_atom_addrs[9]); {
+		tb_data(tb, u4_(look_at));
 	}
 }
 
-FI_ void camera_look_at_c11(Camera* c, P3_S4* target, V3_S4* up_in) { resolve_look_at_c11(& c->look_at, & c->pos, target, up_in); }
-
 GCC_OPTIMIZATION_DISABLE
 void update(PrimitiveArena* pa, U4* ordering_buf) 
 {
@@ -336,17 +463,12 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
 	A2_S2 p;    //???
 	S4 flag; //????
 
-	// Camera Look at
-	if (1)
-	{
+	B4 use_c11_path = false;
+	if (use_c11_path) {
 		camera_look_at_c11(& smem.cam, & smem.cube.pos, & v3s4(0, -fp_one, 0));
 	}
-	// Camera look at (Tape)
+	if (use_c11_path == false)
 	{
-		MT3_S2S4* look_at = & smem.cam.look_at;
-		P3_S4*    eye     = & smem.cam.pos;
-		V3_S4*    up_in   = & v3s4(0, -fp_one, 0);
-
 		tb.used = 0; tb_scope_run(& tb) {
 			resolve_look_at(& tb, & smem.cam.look_at, & smem.cam.pos, & smem.cube.pos, & v3s4(0, -fp_one, 0));
 		}
@@ -455,7 +577,8 @@ GCC_OPTIMIZATION_DISABLE
 int main(void)
 {
 	smem = (SMemory){0};
-	smem.scratchpad = C_(U4_V, 0x1F800000);
+	// TODO(Ed): remove this field we don't need it in smem.
+	smem.scratchpad = C_(U4_V, Scratchpad_Loc);
 	// smem.primitives.used = 0;
 	// smem.active_buf_id   = 0;
 	smem.cam.pos = v3s4(500, -1000, -1500);
@@ -501,3 +624,4 @@ int main(void)
 	return 0;
 }
 GCC_OPTIMIZATION_ENABLE
+

scripts/duffle.lua

@@ -515,8 +515,7 @@ local function splice_c_lines(source)
 		local splice_len = nil
 		if byte == BYTE_BACKSLASH and source:byte(pos + 1) == BYTE_NEWLINE then
 			splice_len = 2
-		elseif byte == BYTE_BACKSLASH and source:byte(pos + 1) == BYTE_CR
-			and source:byte(pos + 2) == BYTE_NEWLINE then
+		elseif byte == BYTE_BACKSLASH and source:byte(pos + 1) == BYTE_CR and source:byte(pos + 2) == BYTE_NEWLINE then
 			splice_len = 3
 		end
 
@@ -1314,6 +1313,21 @@ M.GTE_COMMAND_LATCH_WINDOWS = {
 	},
 }
 
+--- GTE control-register alias groups.
+--- Aliases within a group write to the same C2 control-register slot on real silicon
+--- (the silicon double-maps some C2 slots across multiple PSX SDK / libgte conventions).
+--- Aliases across groups write to distinct C2 slots.
+---
+--- Cross-alias writes inside one atom body, or across the wave-context boundary,
+--- silently clobber each other. The `check_gte_cr_alias_writes` check warns about
+--- each pair per source. See `docs/gte_reference.md` §"Control-register alias table"
+--- for the silicon rationale and the libgte outer-product convention.
+M.GTE_CR_ALIAS_GROUPS = {
+	{ 24, { "gte_cr_RBK", "gte_cr_OFX" } },   -- background R vs screen offset X
+	{ 25, { "gte_cr_GBK", "gte_cr_OFY" } },   -- background G vs screen offset Y
+	{ 26, { "gte_cr_BBK", "gte_cr_H"   } },   -- background B vs projection plane distance H
+}
+
 -- Operand-class table for the COP2->GPR load-delay check.
 -- Maps each emitting-token ident to the set of GPR operand positions it reads.
 -- Covers the current encoder vocabulary (`code/duffle/mips.h` + `code/duffle/gte.h`); add rows here as new encoders land.
@@ -2095,7 +2109,8 @@ local E_MAC_PREFIX_LEN = 4
 ---   * Unknown `mac_X` (not in `component_index`): fall back to `word_counts[ident]` if present; otherwise emit one opaque event so the cycle budget accounts for the word.
 ---   * Marker Tokens (`atom_label(...)` / `atom_offset(...)`): Zero events (they are pure metaprogram hints).
 ---
---- Cycle protection: a per-expansion `visiting` set tracks components currently on the expansion stack; a re-entry produces a deterministic `{kind = "cycle", ...}` error and aborts that branch (does NOT hang, does NOT recurse).
+--- Cycle protection: a per-expansion `visiting` set tracks components currently on the expansion stack;
+--- a re-entry produces a deterministic `{kind = "cycle", ...}` error and aborts that branch (does NOT hang, does NOT recurse).
 ---
 --- Pure: reads `body_entry` / `component_index` / `word_counts`. Memoization is the caller's responsibility.
 --- Callers wanting `word_events` / `word_event_errors` precomputed for many atoms should memoize them per atom.

scripts/duffle_paths.lua

@@ -47,8 +47,7 @@ local function find_repo_root()
 	return root
 end
 
---- Set `package.path` (for `require("duffle")` + `require("passes.X")`) and
---- `package.cpath` (for `lpeg.dll`).
+--- Set `package.path` (for `require("duffle")` + `require("passes.X")`) and `package.cpath` (for `lpeg.dll`).
 ---
 --- This script does NOT touch the OS environment: no `os.setenv`, no `os.putenv`, no `$PATH` mods. 
 --- It just sets `package.path` and `package.cpath` (the standard Lua way to register module search dirs). 

scripts/passes/auto_reg.lua

@@ -4,22 +4,21 @@
 --- Runs a deterministic first-fit allocator in the `R_T0..R_T7 + R_V0..R_V1` pool (10 physical GPRs).
 --- Emits one `#define R_<Sym>_Code R_Tn_Code` per marker into per-directory `gen/auto_reg.h`.
 ---
---- User-pinned GPRs (added 2026-08-10): The corpus's `register_alias_registry` is consulted to
---- exclude GPRs the user has pinned via `atom_reg` + `_Code` defs (e.g. wave-context carriers like
---- `R_ResolveScratch = R_T4 atom_reg`). These GPRs are unavailable to EVERY atom's source pool,
---- not just to atoms in the same phase — wave-context carriers are preserved across atoms by the
---- wave-context discipline and must never be reallocated.
+--- User-pinned GPRs : The corpus's `register_alias_registry` is consulted to exclude GPRs the user has pinned via 
+--- `atom_reg` + `_Code` defs (e.g. carriers like `R_ResolveScratch = R_T4 atom_reg`). 
+--- These GPRs are unavailable to EVERY atom's source pool.
+--- Carriers are preserved across atoms by context discipline and must never be reallocated.
 --- Per-atom body parsing also catches alias references (R_<Alias>) and hardcoded R_Tn references,
 --- so the user can write either `R_T4` or `R_ResolveScratch` in an atom body and the pass will
 --- exclude R_T4 from that atom's pool.
 ---
 --- Conflict detection: If the user hardcodes `R_Tn` in an atom body that shares a phase with an auto-reg that picked `R_Tn`,
---- emit `phase_register_clash` as an info finding (no build stop). Should be unreachable after the
---- user-pinning + body-parsing fix above; kept as a defensive safety net.
+--- emit `phase_register_clash` as an info finding (no build stop).
+--- Should be unreachable after the user-pinning + body-parsing fix above; kept as a defensive safety net.
 ---
---- Pool exhaustion: if a phase declares more `R_<Sym>` mappings than the 10-register pool can hold,
+--- Pool exhaustion: If a phase declares more `R_<Sym>` mappings than the 10-register pool can hold,
 --- emit `phase_register_pool_exhausted` as a build-stopping error.
----
+
 --- @class AutoRegResult
 --- @field outputs  table[]  -- {kind=, path=} entries
 --- @field errors   table[]  -- {line=, msg=}  entries (build-stops)
@@ -28,20 +27,57 @@
 local _bootstrap_dir = debug.getinfo(1, "S").source:match("^@?(.*[/\\])") or "./"
 local duffle         = dofile(_bootstrap_dir .. "../duffle_paths.lua")
 
--- The fixed allocation pool: 10 physical GPRs whose `R_<Sym>_Code` macros exist in mips.h (lines 92-107).
--- Each pool entry is the PHYSICAL GPR ident (R_T0 etc.);
--- `gpr .. "_Code"` resolves to the matching `R_Tn_Code` constant the source code references via `#define R_Load_Code R_T0_Code`.
--- Excluded: R_AT (assembler temp per lottes_tape.h:86), R_T8 (deferred to ac_yield_load pattern),
---           R_T9 (R_TapePtr; owned by the tape runtime).
+--- ════════════════════════════════════════════════════════════════════════════
+--- THE GPR ALLOCATION POOL — what is allocatable, and (more importantly) WHY
+--- ════════════════════════════════════════════════════════════════════════════
+---
+--- The auto-reg pass picks physical GPRs for `atom_auto_reg(...)` / `phase_auto_reg(...)` markers.
+--- It allocates from a FIXED 10-register pool.
+--- This comment block makes the inclusion AND exclusion criteria obvious so a reader doesn't have 
+--- to grep lottes_tape.h + mips.h to understand the design.
+---
+--- ── WHAT'S IN THE POOL (10 GPRs, all caller-trash per the O32 ABI) ────────
+---     R_T0..R_T7  (GPR codes 8..15), R_V0..R_V1 (GPR codes 2..3)  
+---      The workhorse of every atom body. The uesr should be aware of atom allocation across atoms they chain. 
+---      If they have a collision it means either they didn't saturate the register file optimally for a phase,
+---      or the may have made the workload to large for the run.
+---
+--- ── WHAT'S NOT IN THE POOL — and WHY (the "obvious exclusions") ────────────
+---   R_T9  (GPR code 25)  — R_TapePtr, the tape instruction stream pointer.
+---     Owned by the tape runtime (in tape_run / tape_run_a02_s07).
+---     `rgcc(R_TapePtr)` register-variable ties the C compiler's view to $t9 across the whole tape_run.
+---     The auto-reg pass MUST NOT clobber this; doing so would desync the C-side tape pointer from the
+---     hardware pointer and crash on the next tape_run.
+---
+---   R_T8  (GPR code 24)  — R_AtomJmp, the atom-jump register used by the 4-word yield handshake.
+---     Every `mac_yield()` / `mac_yield_tail` does `load_word R_AtomJmp, R_TapePtr, 0` then
+---     `jump_reg R_AtomJmp`. The auto-reg pass MUST NOT clobber this either, or the atom dispatcher breaks.
+---     Owned by the tape runtime, same family as R_TapePtr.
+---
+---   R_AT  (GPR code 1)   — Assembler temporary. Reserved by the MIPS O32 ABI for pseudoinstruction expansion
+---     (lottes_tape.h:86, mips.h:93). The ISA's psuedo instructions use it as a scratch temporary.
+---
+---   R_A0..A3 (codes 4..7)   — Function arguments. Used in tape_run_a02_s07, see below.
+---   R_S0..S7 (codes 16..23) — Callee-saved. Preserved across C-ABI calls by convention.
+---     The `tape_run_a02_s07` variant clobbers them deliberately, but the default `tape_run` does NOT.
+---     Kept out of POOL to preserve the conservative default.
+---     Add them in a separate "big clobber" pool if/when needed.
+---
+---   R_K0/K1       (codes 26..27) — Kernel / interrupt handler reserves. Never touched by user code; OS-internal.
+---   R_GP/SP/FP/RA (codes 28..31) — Stack frame + return-address. Owned by the C compiler; never allocatable.
+---   R_0           (code 0)       — Hardwired zero. Cannot be written.
+---
 local POOL = {
     "R_T0", "R_T1", "R_T2", "R_T3",
     "R_T4", "R_T5", "R_T6", "R_T7",
     "R_V0", "R_V1",
 }
 
--- Map from integer MIPS GPR code (the `code` field on AliasEntry) to the physical GPR ident
--- in POOL. The standard MIPS O32 ABI register numbering matches mips.h's R_*_Code #defines
--- (mips.h:92-123). Only the POOL entries matter for auto_reg — non-pool aliases are out of scope.
+-- Map from integer MIPS GPR code (the `code` field on AliasEntry) to the physical GPR ident in POOL.
+-- The standard MIPS O32 ABI register numbering matches mips.h's R_*_Code #defines (mips.h).
+-- Only the POOL entries matter for auto_reg — non-pool aliases
+-- (R_AT=1, R_A0..A3=4..7, R_T8=24, R_T9=25, R_K0/K1=26..27, R_GP/SP/FP/RA=28..31) 
+-- are deliberately omitted — see the comment block above for the WHY of each exclusion.
 local INT_CODE_TO_POOL_GPR = {
     [2]  = "R_V0", [3]  = "R_V1",
     [8]  = "R_T0", [9]  = "R_T1", [10] = "R_T2", [11] = "R_T3",
@@ -71,8 +107,9 @@ local function allocate_phase(phase_label, decls)
         if not next_gpr then
             errors[#errors + 1] = {
                 line = 0,
-                msg  = string.format(
-                    "phase_register_pool_exhausted: phase '%s' requested symbol '%s' but the pool has no remaining registers (max 10 per phase: R_T0..R_T7 + R_V0..R_V1). Split the phase or use hardcoded GPRs."
+                msg  = string.format("phase_register_pool_exhausted: "
+									.. "phase '%s' requested symbol '%s' but the pool has no remaining registers "
+									.. "(max 10 per phase: R_T0..R_T7 + R_V0..R_V1). Split the phase or use hardcoded GPRs."
                   , phase_label, sym),
             }
             return result, errors
@@ -83,21 +120,17 @@ local function allocate_phase(phase_label, decls)
 end
 
 -- Build two projections from corpus.register_alias_registry:
---   user_pinned   -- { [physical_gpr_ident] = true }   -- GPRs unavailable to auto_reg globally
---                                                       -- (wave-context carriers, file-scope pinned aliases)
+--   user_pinned   -- { [physical_gpr_ident] = true } -- GPRs unavailable to auto_reg globally (wave-context carriers, file-scope pinned aliases)
 --   alias_to_gpr  -- { [alias_ident]        = physical_gpr_ident } -- for body parsing
--- Both projections are derived from the same set of entries: every AliasEntry in
--- register_alias_registry has `has_atom_reg = true` (only those entries are added to the
--- registry; see passes/scan_source.lua parse_enum_entry). Each entry's `code` is the integer
--- MIPS GPR number (0..31); INT_CODE_TO_POOL_GPR translates it back to the physical GPR ident.
--- Aliases whose `code` points to a non-POOL GPR (e.g. R_S0, R_T8, R_K1) are ignored — they
--- don't affect the auto_reg pool, and they're already excluded from POOL above.
+-- Both projections are derived from the same set of entries: every AliasEntry in register_alias_registry has `has_atom_reg = true` 
+-- (only those entries are added to the registry; see passes/scan_source.lua parse_enum_entry).
+-- Each entry's `code` is the integer MIPS GPR number (0..31); INT_CODE_TO_POOL_GPR translates it back to the physical GPR ident.
+-- Aliases whose `code` points to a non-POOL GPR (e.g. R_S0, R_T8, R_K1) are ignored — 
+-- they don't affect the auto_reg pool, and they're already excluded from POOL above.
 local function build_user_pins(corpus)
     local user_pinned  = {}
     local alias_to_gpr = {}
-    if not corpus.register_alias_registry then
-        return user_pinned, alias_to_gpr
-    end
+    if not corpus.register_alias_registry then return user_pinned, alias_to_gpr end
     for alias_name, alias_entry in pairs(corpus.register_alias_registry) do
         if alias_entry.has_atom_reg and alias_entry.code then
             local gpr = INT_CODE_TO_POOL_GPR[alias_entry.code]
@@ -111,10 +144,10 @@ local function build_user_pins(corpus)
 end
 
 -- Find every physical GPR referenced in the atom body, via EITHER:
---   (a) a hardcoded physical GPR ident (R_T\d+|R_V\d+|R_A\d+|R_S\d+) — the existing regex;
---   (b) an alias ident (R_<Alias>) resolved via alias_to_gpr back to its physical GPR ident.
--- Returns { [physical_gpr_ident] = count }. The clash-detection and source-pool-exclusion logic
--- only needs the presence of each GPR (boolean test), but keeping the count preserves the
+--   (a) A hardcoded physical GPR ident (R_T\d+|R_V\d+|R_A\d+|R_S\d+) — the existing regex;
+--   (b) An alias ident (R_<Alias>) resolved via alias_to_gpr back to its physical GPR ident.
+-- Returns { [physical_gpr_ident] = count }. Clash-detection and source-pool-exclusion logic
+-- only needs the presence of each GPR (boolean test), but keeping count preserves the
 -- original find_hardcoded_rn shape so callers can switch without churn.
 -- The alias pattern is sorted lexicographically to keep the regex deterministic.
 local function find_used_gprs(body_text, alias_to_gpr)
@@ -190,12 +223,10 @@ function M.run(ctx)
     end
 
     -- 0. Build the user-pinned GPR exclusion set + alias-to-GPR resolution map.
-    --    Wave-context carriers (e.g. `R_ResolveScratch = R_T4 atom_reg` in
-    --    hello_camera.atom.c) MUST NOT be allocated to any auto-reg marker — they're
-    --    preserved across atoms by the wave-context discipline. The corpus's
-    --    register_alias_registry is the source of truth for these opt-in pins.
-    --    Body references to those aliases (via alias_to_gpr) are also excluded on a
-    --    per-atom basis in step 2 below.
+    --  Wave-context carriers (e.g. `R_ResolveScratch = R_T4 atom_reg` in hello_camera.atom.c)
+    --  MUST NOT be allocated to any auto-reg marker — they're preserved across atoms by the wave-context discipline.
+		--  The corpus's register_alias_registry is the source of truth for these opt-in pins.
+    --  Body references to those aliases (via alias_to_gpr) are also excluded on a per-atom basis in step 2 below.
     local user_pinned, alias_to_gpr = build_user_pins(corpus)
 
     -- 1. Allocate phase pools first (phase declarations take precedence over per-atom declarations).
@@ -213,8 +244,8 @@ function M.run(ctx)
 
     -- 2. Allocate per-atom auto-regs. If the atom scope matches a phase, reuse the phase pool.
     -- Otherwise, allocate a private pool for the atom.
-    -- The phase membership is in `corpus.atom_phases[phase_label].atoms` (an array of atom names declared via `atom_phase(<phase>)` in the atom's `atom_info` line). 
-		-- Build a reverse map `atom_name -> phase_label` so the lookup is O(1) per atom scope.
+    -- The phase membership is in `corpus.atom_phases[phase_label].atoms` (an array of atom names declared via `atom_phase(<phase>)`
+		-- in the atom's `atom_info` line). Build a reverse map `atom_name -> phase_label` so the lookup is O(1) per atom scope.
     local atom_name_to_phase = {}
     for phase_label, entry in pairs(corpus.atom_phases or {}) do
         for _, atom_name in ipairs(entry.atoms or {}) do
@@ -229,8 +260,7 @@ function M.run(ctx)
         --   (a) every GPR already committed (phase allocations + prior atom allocations)
         --   (b) every USER-PINNED GPR (wave-context carriers + file-scope pinned aliases)
         --   (c) every GPR referenced in the atom's body — either hardcoded R_X or alias R_Xxx
-        --       (the latter resolved via alias_to_gpr; this catches cases where the user
-        --       wrote R_ResolveScratch instead of R_T4 directly)
+        --       (the latter resolved via alias_to_gpr; this catches cases where the user wrote R_ResolveScratch instead of R_T4 directly)
         -- Atoms whose scope matches a phase share the global pool with the phase allocations;
         -- the original `source_pool = phase_allocations[phase_label]` form used the phase
         -- allocation MAP as a pool, but that map has no array part, so `table.remove(source_pool, 1)`
@@ -259,7 +289,8 @@ function M.run(ctx)
             if not next_gpr then
                 errors[#errors + 1] = {
                     line = 0,
-                    msg  = string.format("phase_register_pool_exhausted: atom '%s' requested symbol '%s' but no free registers remain in its scope pool."
+                    msg  = string.format("phase_register_pool_exhausted: atom '%s' requested symbol '%s' "
+											.. "but no free registers remain in its scope pool."
                     	, atom_scope, sym),
                 }
             else
@@ -271,10 +302,10 @@ function M.run(ctx)
 
     -- 3. Conflict-with-hardcoded detection (defensive — should be unreachable now).
     -- The source_pool exclusion in step 2 (b) + (c) already accounts for both user-pinned GPRs
-    -- and body-referenced GPRs (hardcoded R_Tn OR alias R_<Alias>). An auto-reg allocation that
-    -- matched an existing body reference would be impossible by construction. This warning is kept
-    -- as a defensive safety net for cases the body scanner might miss (e.g. macros that expand to
-    -- register references the scanner cannot resolve).
+    -- and body-referenced GPRs (hardcoded R_Tn OR alias R_<Alias>).
+		-- An auto-reg allocation that matched an existing body reference would be impossible by construction.
+		-- This warning is kept as a defensive safety net for cases the body scanner might miss
+		-- (e.g. macros that expand to register references the scanner cannot resolve).
     -- For each resolved (scope, sym) -> R_Tn mapping, scan the atom body source for used GPRs.
     for atom_scope, decls in pairs(atom_allocations) do
         local atom = corpus.atoms_by_name and corpus.atoms_by_name[atom_scope]
@@ -284,7 +315,8 @@ function M.run(ctx)
                 if used_in_body[allocated_gpr] and used_in_body[allocated_gpr] > 0 then
                     warnings[#warnings + 1] = {
                         line  = atom.line or 0,
-                        msg   = string.format("phase_register_clash: atom '%s' has hardcoded '%s' in its body AND an auto-reg marker '%s' that was allocated to '%s' (same phase). Resolve by removing the hardcoded reference or renaming the auto-reg."
+                        msg   = string.format("phase_register_clash: atom '%s' has hardcoded '%s' in its body AND an auto-reg marker '%s' "
+													.. "that was allocated to '%s' (same phase). Resolve by removing the hardcoded reference or renaming the auto-reg."
                         	, atom_scope, allocated_gpr, sym, allocated_gpr),
                     }
                 end
@@ -300,7 +332,8 @@ function M.run(ctx)
         for _, src in ipairs(sources) do
             -- Collect every (sym -> gpr) entry that originated from a source in this directory.
             -- `src.scan.atom_auto_regs` is keyed by ATOM SCOPE NAME; `pairs(t)` iterates KEYS so `scope_name` here is the scope ident (e.g. "cube_g4_face").
-						-- The previous `for _, scan_atom_auto` form silently assigned the VALUE (a `{sym = sym}` table) to the variable, which made `atom_allocations[scan_atom_auto]` a table-indexed lookup that never resolved.
+						-- The previous `for _, scan_atom_auto` form silently assigned the VALUE (a `{sym = sym}` table) to the variable,
+						-- which made `atom_allocations[scan_atom_auto]` a table-indexed lookup that never resolved.
             for scope_name in pairs(src.scan and src.scan.atom_auto_regs or {}) do
                 for sym, gpr in pairs(atom_allocations[scope_name] or {}) do
                     per_dir_mappings[sym] = gpr

scripts/passes/components.lua

@@ -3,9 +3,12 @@
 --- Ownership: `corpus.word_counts`, `corpus.components`, and `corpus.component_body_index`.
 --- Scanner owns `declaration_comment` and `debug_skip` on each declaration record; this pass projects both forward.
 ---
---- Reads the pre-scanned SourceScan payload from `duffle.scan_source` for `MipsAtomComp_(ac_X)`, `MipsAtomComp_Proc_(ac_X, { body })`, and `MipsAtom_Proc_(X, ab, { body })` declarations,
+--- Reads the pre-scanned SourceScan payload from `duffle.scan_source` for `MipsAtomComp_(ac_X)` and `MipsAtomComp_Proc_(ac_X, { body })` declarations (kind="comp_bare" / "comp_proc"),
 --- then resolves the function-args string from the preceding `FI_ Slice_MipsCode ac_X(...)` declaration via a backward walk.
 ---
+--- `MipsAtom_Proc_(X, ab, { body })` declarations (kind="atom_proc") are ATOMS, not components, and are deliberately excluded —
+--- atoms get emitted via `tb_emit(tb, code_<name>)` linker symbols, not inlined as `mac_*` macros.
+---
 --- Emits one `gen/macs.h` per *immediate source directory* with `#define mac_X(sig) \` macros plus `WORD_COUNT(mac_X, N)` entries for downstream offset computation.
 --- All sources inside the same directory contribute to the same file (per-directory aggregation).
 --- The directory itself is the namespace, so the filename does not repeat the module name.
@@ -76,7 +79,7 @@ local MACS_FILENAME   = "macs.h"
 --- @field args       string|nil -- Function-args string (function form only)
 --- @field line       integer    -- Source line of the declaration
 --- @field comment    string|nil -- Scanner-owned `declaration_comment`; the components pass reads it from the scanner record
---- @field kind       string     -- "comp_bare" | "comp_proc" | "atom_proc"
+--- @field kind       string     -- "comp_bare" | "comp_proc"  (atom_proc is NOT a component — see `project_components`)
 --- @field debug_skip boolean    -- Mirror of `a.debug_skip` (scanner-owned); true iff a bare `atom_dbg_skip` marker immediately preceded the declaration
 
 -- ════════════════════════════════════════════════════════════════════════════
@@ -200,16 +203,17 @@ end
 local function project_components(source, scan)
 	local out = {}
 	for _, a in ipairs(scan.atoms) do
-		if a.kind == "comp_bare" or a.kind == "comp_proc" or a.kind == "atom_proc" then
-			-- `MipsAtom_Proc_` atoms have no `FI_ Slice_MipsCode ac_X(...)` function-decl prelude
-			-- (the macro sits inside a wrapping `I_ void <proc_name>(...)` body), so the function-args
-			-- lookup is meaningless; signature defaults to `...` (variadic-ignored).
-			-- The `mac_<name>` alias expansion discards the `ab` (atom-builder) arg the same way
-			-- `MipsAtomComp_Proc_` components do.
-			local args = nil
-			if a.kind ~= "atom_proc" then
-				args = find_function_args_for(source, a.raw_name, a.ident_pos)
-			end
+		-- Only `MipsAtomComp_(ac_X)` (kind="comp_bare") and `MipsAtomComp_Proc_(ac_X, ...)` (kind="comp_proc")
+		-- are COMPONENTS — they get inlined via `mac_<name>` aliases inside atom bodies.
+		-- `MipsAtom_Proc_` (kind="atom_proc") is an ATOM (ends with `mac_yield()`); it gets emitted via
+		-- `tb_emit(tb, code_<name>)` (linker symbol), NOT inlined as a macro. Including `atom_proc` here
+		-- would incorrectly emit `mac_<name>` aliases for atoms, polluting `gen/macs.h`.
+		-- See `docs/duffle_dsl_primer.md` §"mac_* aliases" for the contract.
+		if a.kind == "comp_bare" or a.kind == "comp_proc" then
+			-- Function-args lookup is meaningful for `MipsAtomComp_Proc_` components
+			-- (the macro sits inside `FI_ Slice_MipsCode ac_X(...)`); the alias expansion
+			-- discards the `ab` (atom-builder) arg the same way both forms do.
+			local args = find_function_args_for(source, a.raw_name, a.ident_pos)
 			-- Comment ownership: scan_source.lua stamps `declaration_comment` on the record by walking backward past any associated bare marker.
 			-- The pass reads `declaration_comment` directly.
 			local comment = a.declaration_comment or ""
@@ -221,7 +225,7 @@ local function project_components(source, scan)
 				body_tokens = a.body_tokens,
 				args        = args,
 				comment     = comment,
-				kind        = a.kind,  -- "comp_bare" | "comp_proc" | "atom_proc"; provenance emitter reads this.
+				kind        = a.kind,  -- "comp_bare" | "comp_proc"; provenance emitter reads this.
 				debug_skip  = a.debug_skip == true,
 			}
 		end
@@ -400,8 +404,7 @@ local function cycle_cost_rec(name, comp_by_name, latency, cache)
 end
 
 --- (internal) Recursive GP0 prim-buffer contribution. Count `store_word` / `store_half` / `store_byte` 
---- calls in the component body that target `R_PrimCursor` (these are the
---- RAM-side prim-buffer words the macro contributes), recursing through nested `mac_*` calls.
+--- calls in the component body that target `R_PrimCursor` (these are the RAM-side prim-buffer words the macro contributes), recursing through nested `mac_*` calls.
 --- Only `R_PrimCursor`-targeting stores count. Stores targeting other registers (e.g. `R_OtBase`, heap pointers) are not prim-buffer contributions.
 --- @param name         string
 --- @param comp_by_name table<string, Component>
@@ -484,10 +487,9 @@ end
 
 --- Determine the macro signature: function-args list (function form) or variadic-ignored (bare form).
 --- For `MipsAtomComp_Proc_` components, the leading `ab` (atom-builder) arg is dropped:
---- the generated `mac_<name>` macros are inline-expansion aliases for baked atoms; their bodies
---- don't reference `ab` (the builder is only consumed by the procedural `atombuilder_unroll` line
---- that `MipsAtomComp_Proc_` appends after the body). Inline callers therefore don't need to thread
---- a builder context.
+--- the generated `mac_<name>` macros are inline-expansion aliases for baked atoms; their bodies don't reference `ab`
+--- (the builder is only consumed by the procedural `atombuilder_unroll` line that `MipsAtomComp_Proc_` appends after the body).
+--- Inline callers therefore don't need to thread a builder context.
 --- @param args_str string|nil
 --- @return string
 local function signature_from_args(args_str)
@@ -544,7 +546,7 @@ local function build_component_lines(c, counts)
 
 	-- Marker comment: emitted once for every skipped component.
 	-- The marker is scanner-owned (declared by `atom_dbg_skip` immediately before the declaration in the source);
-	-- the components pass projects `c.debug_skip` and emits the marker as a generated comment.
+	-- This pass projects `c.debug_skip` and emits the marker as a generated comment.
 	if c.debug_skip then
 		lines[#lines + 1] = "/* atom_dbg_skip */"
 	end
@@ -578,8 +580,8 @@ end
 
 --- Build the boilerplate header lines (the `#ifdef INTELLISENSE_DIRECTIVES` block,
 --- the `// Auto-generated` comment, the `// Source:` line, and the self-contained `WORD_COUNT` macro definition).
---- @param dir     string       -- the absolute source directory
---- @param sources SourceFile[] -- sources contributing to this directory (for the header comment)
+--- @param dir     string       -- Absolute source directory
+--- @param sources SourceFile[] -- Sources contributing to this directory (for the header comment)
 --- @return string[]
 local function header_boilerplate(dir, sources)
 	local source_lines = { "// Directory: " .. duffle.to_absolute_path(dir) .. "/" }
@@ -610,9 +612,9 @@ end
 --- Compute the per-directory output path for `.macs.h`.
 ---  e.g. any source in `code/duffle/` produces `code/duffle/gen/macs.h` regardless of source filename.
 --- The directory name is the namespace; the filename does not repeat it.
---- @param dir string  -- the absolute source directory
---- @return string  -- the output directory
---- @return string  -- the full output path
+--- @param dir string  -- Absolute source directory
+--- @return string  -- Output directory
+--- @return string  -- Full output path
 local function compute_macs_h_path(dir)
 	local  out_dir  = dir .. "/" .. GEN_SUBDIR
 	local  out_path = out_dir .. "/" .. MACS_FILENAME
@@ -622,11 +624,11 @@ end
 --- Emit a per-directory `.macs.h` header with the aggregated `mac_X` macros + `WORD_COUNT` entries.
 --- Writes in BINARY mode so LF line endings are preserved (the git blob is LF; Windows text-mode would emit CRLF and break the byte-identical diff).
 --- @param ctx        PassCtx
---- @param dir        string                  -- the absolute source directory
---- @param sources    SourceFile[]            -- sources contributing to this directory (for the header comment)
---- @param components Component[]             -- aggregated components from all sources in this directory
---- @param counts     table<string, integer>  -- precomputed word counts (from count_all_components)
---- @return string|nil  -- path to the written file (nil if no components)
+--- @param dir        string                  -- Absolute source directory
+--- @param sources    SourceFile[]            -- Sources contributing to this directory (for the header comment)
+--- @param components Component[]             -- Aggregated components from all sources in this directory
+--- @param counts     table<string, integer>  -- Precomputed word counts (from count_all_components)
+--- @return string|nil -- Path to the written file (nil if no components)
 local function emit_component_macros_h(ctx, dir, sources, components, counts)
 	if #components == 0 then return nil end
 	local out_dir, out_path = compute_macs_h_path(dir)
@@ -665,11 +667,11 @@ local function update_canonical_word_counts(corpus, components, counts)
 end
 
 --- @class ComponentDef
---- @field name       string  -- bare name (without ac_/mac_ prefix)
---- @field line       integer -- definition source line (line of `MipsAtomComp_(ac_X)` / `MipsAtomComp_Proc_(ac_X, ...)`)
---- @field path       string  -- absolute source path of the definition
---- @field kind       string  -- "comp_bare" | "comp_proc" | "atom_proc"
---- @field debug_skip boolean -- mirror of the scanner-owned `a.debug_skip`; consumers read this directly
+--- @field name       string  -- Bare name (without ac_/mac_ prefix)
+--- @field line       integer -- Definition source line (line of `MipsAtomComp_(ac_X)` / `MipsAtomComp_Proc_(ac_X, ...)`)
+--- @field path       string  -- Absolute source path of the definition
+--- @field kind       string  -- "comp_bare" | "comp_proc"  (atom_proc is NOT a component)
+--- @field debug_skip boolean -- Mirror of the scanner-owned `a.debug_skip`; consumers read this directly
 
 --- (internal) Populate `corpus.components` with this source's components-by-name map.
 --- First declaration wins; later declarations of the same bare name are dropped and recorded as a collision via `corpus.collisions` (kind = "component").

scripts/passes/dwarf_injection.lua

@@ -703,9 +703,9 @@ end
 ---     `{comp_name, call_file, call_line, comp_file, comp_line, start_pos, end_pos, body_lines, debug_skip}`. `body_lines[k]`
 ---     is the k-th word's source line within the component body.
 ---
---- @param corpus table -- the corpus from `ctx.shared.corpus`
+--- @param corpus table -- From `ctx.shared.corpus`
 --- @param addrs  table -- ELF symbols keyed by atom name from `elf_dwarf.read_nm`
---- @return table[]  -- list of {name, addr, size_bytes, words, entries, invocations, debug_skip?}
+--- @return table[]  -- List of {name, addr, size_bytes, words, entries, invocations, debug_skip?}
 local function build_atom_table(corpus, addrs)
 	-- Cross-ref: keep only atoms present in BOTH the nm symbol table AND `corpus.atoms_by_name`. Output is sorted by ascending addr.
 	local atoms_by_name = corpus.atoms_by_name or {}
@@ -834,10 +834,10 @@ end
 --- This is intentional: silently falling back to a hardcoded GPR would mask the missing opt-in.
 ---
 --- Pre-tokenized: `body_tokens` is the scan-source pass's pre-split list of top-level statements (each entry is a single `load_*` call or other statement).
---- @param body_tokens table[]  -- the atom's pre-tokenized body statements (from atom.body_tokens)
---- @param binds_name  string   -- expected Binds_X name (skip pairs with mismatching binds)
---- @param registries  table    -- merged registries from collect_per_source_registries
---- @return table[]             -- list of {reg = <MIPS index>, field = <field name>}
+--- @param body_tokens table[]  -- The atom's pre-tokenized body statements (from atom.body_tokens)
+--- @param binds_name  string   -- Expected Binds_X name (skip pairs with mismatching binds)
+--- @param registries  table    -- Merged registries from collect_per_source_registries
+--- @return table[]             -- List of {reg = <MIPS index>, field = <field name>}
 local function parse_body_load_pairs(body_tokens, binds_name, registries)
 	local pairs = {}
 	local reg_index_by_name = (registries and registries.register_alias_registry) or {}
@@ -880,9 +880,9 @@ end
 --- The piece chain uses (DW_OP_regN, DW_OP_piece, ULEB128(field_size)).
 ---
 --- Binds fields come from `scan.binds`; the per-source `scan.binds[i].fields` already carries the typed-field record after the scan-source generalization.
---- @param corpus     table   -- the corpus from `ctx.shared.corpus`
---- @param atom_table table[] -- the cross-ref'd atom table from build_atom_table
---- @param registries table   -- merged registries from collect_per_source_registries
+--- @param corpus     table   -- From `ctx.shared.corpus`
+--- @param atom_table table[] -- Cross-ref'd atom table from build_atom_table
+--- @param registries table   -- Merged registries from collect_per_source_registries
 --- @return table, table      -- (rbind_atoms, rbind_structs)
 local function parse_rbind_atoms(corpus, atom_table, registries)
 	registries = registries or {}
@@ -944,7 +944,7 @@ local function parse_rbind_atoms(corpus, atom_table, registries)
 						binds     = ai.binds,
 						fields    = struct.fields, -- {name, offset} from scan.binds
 						bytes     = struct.bytes,
-						regs      = pairs,         -- ordered list of {reg, field}
+						regs      = pairs,         -- Ordered list of {reg, field}
 						info_line = ai.info_line,
 					}
 					table.insert(struct.atom_names, atom_name)
@@ -1780,7 +1780,8 @@ local function build_inserted_children(main_cu_offset, main_cu_end_excl, atom_ta
 	emit(uleb128(ABBREV_TYPED_VIEW_POINTER))  -- DW_TAG_pointer_type (abbrev 110; NOT 9; void chain target)
 	emit(elf_dwarf.write_u32_le(ref4_of(void_chain_offset)))  -- 4-byte ref4: points at the void base_type's tag byte
 	-- type_chain_offsets["void|1"] is what step (f) of the per-RR_<R_Name> chain looks up.
-	type_chain_offsets["void|1"] = void_chain_offset  -- both the base_type offset and the pointer_type are emitted consecutively; the OUTERMOST is the pointer_type. The variable's DW_AT_type must reference the pointer_type, not the base_type. Patch below.
+	type_chain_offsets["void|1"] = void_chain_offset  -- both the base_type offset and the pointer_type are emitted consecutively; the OUTERMOST is the pointer_type.
+	-- The variable's DW_AT_type must reference the pointer_type, not the base_type. Patch below.
 	-- Capture the pointer_type's offset (the last-thing-emitted DIE start) and overwrite the lookup.
 	-- The pointer_type was emitted as: uleb(9) (1 byte) + 4-byte ref4 = 5 bytes. Its tag byte is at void_chain_offset + 8 (the base_type's 8 bytes: 1 tag + 5 name + 1 byte_size + 1 encoding).
 	local ptr_void_offset = void_chain_offset + 8

scripts/passes/offsets.lua

@@ -4,9 +4,17 @@
 --- for `MipsAtom_(name)` and `MipsCode code_<name>` declarations, computes the word offset
 --- from each `atom_offset(F, T)` marker to its target `atom_label(T)` declaration, and emits
 --- `gen/offsets.h` with one `#define _atom_offset_F_T = N` per branch.
+---
 --- Per-directory aggregation: every source in the same directory contributes to the same `gen/offsets.h`.
 --- The directory itself is the namespace; the filename does not repeat the module name.
 ---
+--- (Task 12.16 note: atom-namespaced enum names — e.g., `atom_offset__normalize_v3s4__srav_path__aligned_done` —
+--- were considered to prevent cross-atom label collisions, but the C-side `atom_offset(F, T)` macro in
+--- `code/duffle/dsl.atom.h` doesn't know the current atom_name at expansion time, so any namespacing
+--- on the metaprogram side breaks the C build. Reverted. The C-side would need a per-atom
+--- `CURRENT_ATOM` #define (set by `MipsAtom_`/`MipsAtom_Proc_` macros) plus an updated `atom_offset`
+--- macro that uses it. That's a coordinated refactor — deferred to a future track.)
+---
 --- The offset is `target_word - branch_word - 1` (the standard MIPS branch-immediate encoding: branch_offset = relative_pc_in_words - 1).
 
 -- ════════════════════════════════════════════════════════════════════════════

scripts/passes/static_analysis.lua

@@ -39,8 +39,8 @@
 --- `── Info` section renders finding-level info between `── Warnings` and the per-atom cycle counts.
 ---
 --- The structural handshake checks (`mac_yield_uniformity`, `hazard_nop_use`, `control_transfer_delay_slot_use`) skip atoms/components with `debug_skip == true`.
---- The `atom_dbg_skip` marker designates runtime-helper declarations whose structure is fixed by the tape runtime (e.g. `tape_exit`, `ac_yield`).
---- Flagging them as "missing mac_yield" or "BD slot is redundant" is signal noise, not a logic failure. 
+--- `atom_dbg_skip` marker designates runtime-helper declarations whose structure is fixed by the tape runtime (e.g. `tape_exit`, `ac_yield`).
+--- Flagging them as "missing mac_yield" or "BD slot is redundant".
 --- Other checks (transfer_hazards, gpu_portstore_shape, abi_handoff, enum_alias_membership, …) still apply to debug_skip declarations because real hazards / typos can still surface in them.
 ---
 --- The orchestrator (`ps1_meta.lua`) wires this module in via the PASSES table:
@@ -452,7 +452,7 @@ local function is_cop2_consumer_of(consumer_event, destination, producer_rel)
 end
 
 -- True iff `consumer_event` reads the GPR operand at any position the destination register occupies.
--- The read-position lookup consults `duffle.OPERAND_READ_POSITIONS` for the consumer's encoder and walks each `args[pos]` to find an operand-equal match.
+-- read_pos lookup consults `duffle.OPERAND_READ_POSITIONS` for the consumer's encoder and walks each `args[pos]` to find an operand-equal match.
 local function is_gpr_consumer_of(consumer_event, destination)
 	local consumer_token = consumer_event.encoder or consumer_event.ident
 	local read_pos       = duffle.OPERAND_READ_POSITIONS or {}
@@ -2388,6 +2388,184 @@ end
 
 
 -- ════════════════════════════════════════════════════════════════════════════
+-- ════════════════════════════════════════════════════════════════════════════
+-- GTE control-register alias + RT-diagonal + TR-naming helpers and checks
+-- ════════════════════════════════════════════════════════════════════════════
+
+--- Resolve a `gte_cr_<Alias>` ident to its alias-group entry, or nil if the alias
+--- is in a distinct-slot group (or the alias name is not a known C2 control-register alias).
+--- Reads `M.GTE_CR_ALIAS_GROUPS` from `duffle.lua`.
+local function find_alias_pair_for(alias_name, duffle)
+	local groups = (duffle and duffle.GTE_CR_ALIAS_GROUPS) or {}
+	for _, group in ipairs(groups) do
+		for _, name in ipairs(group[2] or {}) do
+			if name == alias_name then return group end
+		end
+	end
+	return nil
+end
+
+-- True iff `c` (a TokClass entry) is a CPU→COP2 control-register transfer
+-- (`gte_mv_to_ctrl_r` / `gte_mv_from_ctrl_r`).
+local function is_ctrl_r_transfer(c)
+	if c == nil then return false end
+	return c.ident == "gte_mv_to_ctrl_r" or c.ident == "gte_mv_from_ctrl_r"
+end
+
+-- Resolve a token's source line. The per-token `line` is the body-relative
+-- line; `atom.line` is the source line of the atom declaration; `line_in_body`
+-- (atom.paths) maps a body-relative line to its source line. The arithmetic
+-- `atom.line + line_in_body[tok.rel] - 1` matches the convention used by
+-- check_abi_handoff and check_control_transfer_delay_slot_use elsewhere.
+local function atom_body_token_source_line(atom, token, line_in_body)
+	if line_in_body == nil or token == nil or token.rel == nil then
+		return atom.line or 0
+	end
+	local body_line = line_in_body[token.rel]
+	if body_line == nil then return atom.line or 0 end
+	return (atom.line or 0) + body_line - 1
+end
+
+-- Check #N: gte_cr_alias_writes
+-- Fires one warning per atom per alias-group when the atom body touches two
+-- distinct aliases from the same group. Aliases within a group write to the
+-- same C2 control-register slot on real silicon; cross-alias writes inside
+-- one atom body silently clobber each other.
+--
+-- Severity: warning. Build continues. The libgte outer-product convention
+-- uses only RT-row aliases (which are NOT in `M.GTE_CR_ALIAS_GROUPS`), so
+-- the canonical convention does not trigger this check.
+local function check_gte_cr_alias_writes(atom, pipe_ctx, findings)
+	local groups = pipe_ctx.gte_cr_alias_groups or {}
+	if not next(groups) then return end
+
+	local tokens = atom.paths and atom.paths.tokens or {}
+	local tc     = atom.paths and atom.paths.tok_class or {}
+	local line_in_body = atom.paths and atom.paths.line_in_body
+	if not next(tokens) then return end
+
+	-- Build a per-group set of (alias, source_line) pairs touched in this atom body.
+	-- Walks every token; when the token is a ctrl-r transfer, the alias is at
+	-- position tok_idx + 2 (rt, alias, [imm-or-arg]). The pre-classified
+	-- `tc` table tells us whether the token is a ctrl-r transfer and what its
+	-- source line is.
+	local touched = {}
+	for tok_idx, token in ipairs(tokens) do
+		local c = tc[tok_idx]
+		if is_ctrl_r_transfer(c) and tokens[tok_idx + 2] then
+			local alias = tokens[tok_idx + 2].tok
+			local group = find_alias_pair_for(alias, pipe_ctx.duffle)
+			if group then
+				touched[group[1]] = touched[group[1]] or {}
+				touched[group[1]][#touched[group[1]] + 1] = {
+					alias = alias,
+					line  = atom_body_token_source_line(atom, token, line_in_body),
+				}
+			end
+		end
+	end
+
+	-- Fire one warning per group touched with 2+ distinct aliases.
+	for slot, hits in pairs(touched) do
+		local seen = {}
+		local distinct = {}
+		for _, h in ipairs(hits) do
+			if not seen[h.alias] then
+				seen[h.alias] = true
+				distinct[#distinct + 1] = h
+			end
+		end
+		if #distinct >= 2 then
+			local aliases = {}
+			for _, d in ipairs(distinct) do aliases[#aliases + 1] = d.alias end
+			findings[#findings + 1] = {
+				atom  = atom.name or "",
+				line  = distinct[1].line,
+				check = "gte_cr_alias_writes",
+				kind  = "warning",
+				msg   = string.format(
+					"atom '%s' touches %d aliases that share C2[%d]: %s; verify the intent"
+					, atom.name or "", #distinct, slot, table.concat(aliases, ", ")),
+			}
+		end
+	end
+end
+
+-- Check #N+1: rtdiagonal_completeness
+-- Fires one info per atom body when the bare `gte_cmdw_mvmva` macro is used.
+-- The bare macro encodes only the cmd field; the canonical libgte-2-pass
+-- shape uses `gte_cmdw_mvmva_c11_pass2_exact = 0x4A49E012` (gte.h:430).
+--
+-- Severity: info by default. Escalates to warning when
+-- `GTE_RT_DIAGONAL_STRICT=1` env var is set (CI / production builds).
+--
+-- The bare macro IS the right call for the canonical libgte outer-product
+-- convention, so this is an opt-out hint rather than a hard warning.
+local function check_rtdiagonal_completeness(atom, _pipe_ctx, findings)
+	local tokens = atom.paths and atom.paths.tokens or {}
+	local tc     = atom.paths and atom.paths.tok_class or {}
+	local line_in_body = atom.paths and atom.paths.line_in_body
+	if not next(tokens) then return end
+	local strict = os.getenv("GTE_RT_DIAGONAL_STRICT") == "1"
+	for tok_idx, token in ipairs(tokens) do
+		local c = tc[tok_idx]
+		if c and c.ident == "gte_cmdw_mvmva" then
+			findings[#findings + 1] = {
+				atom  = atom.name or "",
+				line  = atom_body_token_source_line(atom, token, line_in_body),
+				check = "rtdiagonal_completeness",
+				kind  = strict and "warning" or "info",
+				msg   = string.format(
+					"atom '%s' uses the bare gte_cmdw_mvmva macro; "
+					.. "the canonical libgte-2-pass shape is gte_cmdw_mvmva_c11_pass2_exact = 0x4A49E012 "
+					.. "(gte.h:430). The bare macro does not encode RT23/RT31/RT32/RT33; "
+					.. "for a full 3x3 matrix, use the dedicated literal or hand-build via enc_gte_*()."
+					, atom.name or ""),
+			}
+		end
+	end
+end
+
+-- Check #N+2: gte_cr_TR_naming
+-- Fires one info per atom body when a `gte_cr_TR[XYZ]` alias is used.
+-- Translation-vector registers are the only 3-letter-suffix C2 aliases
+-- (`TRX/TRY/TRZ`); an agent who reads `TRX` might typo it as `RT_X` or
+-- `RTX0` and either get a compile error (best case) or a build that
+-- links but routes the `ctc2` write to the wrong C2 slot.
+--
+-- Severity: info. The convention is correct; this is a documentation-pointer check.
+local function check_gte_cr_TR_naming(atom, _pipe_ctx, findings)
+	local tokens = atom.paths and atom.paths.tokens or {}
+	local tc     = atom.paths and atom.paths.tok_class or {}
+	local line_in_body = atom.paths and atom.paths.line_in_body
+	if not next(tokens) then return end
+	local touched = false
+	local first_line = 0
+	for tok_idx, token in ipairs(tokens) do
+		local c = tc[tok_idx]
+		if c and c.ident and c.ident:match("^gte_cr_TR[XYZ]$") then
+			touched = true
+			if first_line == 0 then
+				first_line = atom_body_token_source_line(atom, token, line_in_body)
+			end
+		end
+	end
+	if touched then
+		findings[#findings + 1] = {
+			atom  = atom.name or "",
+			line  = first_line,
+			check = "gte_cr_TR_naming",
+			kind  = "info",
+			msg   = string.format(
+				"atom '%s' uses gte_cr_TR[XYZ]; translation-vector registers are the only "
+				.. "3-letter-suffix C2 aliases (TRX/TRY/TRZ). See docs/gte_reference.md §"
+				.. "\"The `gte_cmdw_mvmva_c11_pass2_exact` literal\" for the libgte outer-product "
+				.. "convention that uses these names."
+				, atom.name or ""),
+		}
+	end
+end
+
 -- CHECK_RULES — data-driven check dispatch (Muratori: data over control flow)
 -- ════════════════════════════════════════════════════════════════════════════
 
@@ -2414,6 +2592,9 @@ local CHECK_RULES = {
 	{ name = "abi_handoff",                     per_atom   = check_abi_handoff                     },
 	{ name = "gpu_portstore_shape",             per_atom   = check_gpu_portstore_shape             },
 	{ name = "per_atom_cycle_budget",           per_atom   = check_per_atom_cycle_budget           },
+	{ name = "gte_cr_alias_writes",             per_atom   = check_gte_cr_alias_writes             },
+	{ name = "rtdiagonal_completeness",         per_atom   = check_rtdiagonal_completeness         },
+	{ name = "gte_cr_TR_naming",                per_atom   = check_gte_cr_TR_naming                },
 	{ name = "enum_alias_membership",           per_source = check_enum_alias_membership           },
 	{ name = "atom_type_consistency",           per_source = check_atom_type_consistency           },
 	{ name = "binds_no_substruct_deref",        per_source = check_binds_no_substruct_deref        },
@@ -2457,6 +2638,11 @@ local function build_corpus_pipe_ctx(ctx)
 		atom_infos_list         = corpus.atom_infos              or {},
 		-- Corpus-wide collisions (recorded by scan_source.merge_corpus_registries).
 		collisions              = corpus.collisions              or {},
+		-- GTE control-register alias groups (from `duffle.GTE_CR_ALIAS_GROUPS`).
+		-- The three new per_atom checks (gte_cr_alias_writes, rtdiagonal_completeness,
+		-- gte_cr_TR_naming) read from this view. `duffle` is exposed alongside so
+		-- `find_alias_pair_for` can resolve alias → group without a separate registry.
+		gte_cr_alias_groups     = duffle.GTE_CR_ALIAS_GROUPS or {},
 	}
 end
 

scripts/update_deps.ps1

@@ -61,6 +61,119 @@ if (-not $msbuild_exe) {
 }
 
 $path_pcsx_sln = join-path $path_pcsx_redux 'vsprojects\pcsx-redux.sln'
+
+# ════════════════════════════════════════════════════════════════════════════
+# NuGet restore — required before MSBuild.
+# pcsx-redux's .vcxproj files use the legacy packages.config style with
+# hardcoded `<Import Project="..\packages\{id}.{ver}\...">` directives.
+# MSBuild's `/t:Restore` won't fetch missing packages here (the local
+# packages\ dir is checked but no package-source lookup happens), and
+# `dotnet restore` errors on packages.config projects, so we walk every
+# packages.config, parse out the <package id version/> entries, and pull
+# any missing .nupkg directly from api.nuget.org's flat container.
+# ════════════════════════════════════════════════════════════════════════════
+$path_pcsx_packages = join-path $path_pcsx_redux 'vsprojects\packages'
+$nuget_flat_container = 'https://api.nuget.org/v3-flatcontainer'
+
+# Collect required (id, version) pairs from every packages.config.
+$required_packages = @{}
+Get-ChildItem -Path (join-path $path_pcsx_redux 'vsprojects') -Filter 'packages.config' -Recurse -ErrorAction SilentlyContinue |
+    ForEach-Object {
+        [xml]$xml = Get-Content -LiteralPath $_.FullName -Raw
+        foreach ($pkg in $xml.packages.package) {
+            $key = '{0}|{1}' -f $pkg.id, $pkg.version
+            $required_packages[$key] = @{ id = $pkg.id; version = $pkg.version }
+        }
+    }
+
+# Ensure the packages root exists.
+if (-not (Test-Path -LiteralPath $path_pcsx_packages)) {
+    New-Item -ItemType Directory -Path $path_pcsx_packages -Force | Out-Null
+}
+
+# Download anything missing. Skip the package entirely if its dir already has
+# any contents (the legacy packages.config style means the targets file
+# location varies per package — `luajit.native` puts it at build/native/,
+# `glfw` puts it elsewhere — so we can't probe a specific path; just check
+# whether the dir is non-empty).
+Add-Type -AssemblyName System.IO.Compression.FileSystem
+foreach ($pkg in $required_packages.Values) {
+    $pkgDir = Join-Path $path_pcsx_packages ('{0}.{1}' -f $pkg.id, $pkg.version)
+    if ((Test-Path -LiteralPath $pkgDir) -and `
+        (@(Get-ChildItem -LiteralPath $pkgDir -Recurse -ErrorAction SilentlyContinue).Count -gt 0)) {
+        continue
+    }
+    $url = '{0}/{1}/{2}/{1}.{2}.nupkg' -f $nuget_flat_container, $pkg.id, $pkg.version
+    $nupkg = Join-Path $pkgDir ('{0}.{1}.nupkg' -f $pkg.id, $pkg.version)
+    New-Item -ItemType Directory -Path $pkgDir -Force | Out-Null
+    Write-Host "Fetching NuGet package: $($pkg.id) $($pkg.version)"
+    try {
+        Invoke-WebRequest -Uri $url -OutFile $nupkg -UseBasicParsing -ErrorAction Stop
+        [System.IO.Compression.ZipFile]::ExtractToDirectory($nupkg, $pkgDir)
+        Remove-Item -LiteralPath $nupkg -Force
+    } catch {
+        $msg = $_.Exception.Message
+        if ($msg -match '404') {
+            Write-Host "  Not on nuget.org (vendored?) — skipping $url"
+        } else {
+            Write-Warning "Failed to fetch $url — $msg"
+        }
+        if (Test-Path -LiteralPath $nupkg) { Remove-Item -LiteralPath $nupkg -Force }
+    }
+}
+
+# ════════════════════════════════════════════════════════════════════════════
+# isoffi.lua size guard — `core.vcxproj` #includes src/core/isoffi.lua into
+# luaiso.cc via the `-- lualoader, R"EOF(...)EOF"` trick. The raw string
+# literal between R"EOF(-- and -- )EOF" must stay under ~16,379 bytes or
+# MSVC (19.44) fails with C2026 (its actual raw-string limit is 16,384,
+# minus 5 bytes for the `-- lualoader, ` prefix). If the upstream file
+# grows past that, trim it: remove license header, trailing whitespace,
+# blank separators, inline comments, and shrink 4-space indent to 2-space.
+# Idempotent — only writes when the raw string exceeds the limit.
+# ════════════════════════════════════════════════════════════════════════════
+$path_isoffi = join-path $path_pcsx_redux 'src\core\isoffi.lua'
+if (Test-Path -LiteralPath $path_isoffi) {
+    $content = Get-Content -LiteralPath $path_isoffi -Raw -Encoding utf8
+    $startMarker = $content.IndexOf('R"EOF(--')
+    $endMarker   = $content.IndexOf('-- )EOF"')
+    $literalLen  = if ($startMarker -ge 0 -and $endMarker -gt $startMarker) {
+        $endMarker - ($startMarker + 8)
+    } else { -1 }
+    # Effective MSVC raw-string limit for the lualoader prefix is 16379 bytes.
+    if ($literalLen -gt 16379) {
+        Write-Host "isoffi.lua raw string is $literalLen bytes (>16379); trimming for MSVC C2026 limit."
+        $lines     = $content -split "`n"
+        $markerIdx = -1
+        for ($i = 0; $i -lt $lines.Length; $i++) {
+            if ($lines[$i] -match '^-- \)EOF"') { $markerIdx = $i; break }
+        }
+        $newLines = @()
+        for ($i = 0; $i -lt $lines.Length; $i++) {
+            $lineNum = $i + 1
+            $line    = $lines[$i]
+            # Keep the first line and the EOF-marker line untouched.
+            if ($i -eq 0 -or $i -eq $markerIdx) { $newLines += $line; continue }
+            # Drop the GPL license header (lines 2-17).
+            if ($lineNum -ge 2 -and $lineNum -le 17) { continue }
+            # Drop blank separator lines.
+            if ($line -match '^\s*$') { continue }
+            # Drop trailing whitespace.
+            $line = $line -replace '\s+$', ''
+            # Drop inline comments (anything from `--` to end of line).
+            $line = $line -replace '\s*--.*$', ''
+            # Shrink 4-space indent to 2-space.
+            $line = $line -replace '^(    )', '  '
+            if ($line -match '^\s*$') { continue }
+            $newLines += $line
+        }
+        ($newLines -join "`n") | Out-File -LiteralPath $path_isoffi -Encoding utf8 -NoNewline
+        $newLen = ((Get-Content -LiteralPath $path_isoffi -Raw -Encoding utf8) `
+            -replace '.*R"EOF\(--', '' -replace '-- \)EOF".*', '').Length
+        Write-Host "isoffi.lua trimmed: $literalLen -> $newLen bytes of raw string content."
+    }
+}
+
 & $msbuild_exe $path_pcsx_sln /p:Configuration=Release /p:Platform=x64 /p:PlatformToolset=v143 /m /v:minimal
 
 # Locate luajit via scoop. `luajit.exe` is on PATH via scoop's shim;
@@ -117,6 +230,17 @@ $lfs_dll_import = join-path $luajit_lib_dir 'libluajit-5.1.dll.a'
 # ════════════════════════════════════════════════════════════════════════════
 
 $path_openbios = join-path $path_pcsx_redux 'src\mips\openbios'
+
+# Wipe stale *.dep files across src\mips. These cache absolute paths to the
+# GCC headers directory; if the toolchain was upgraded (e.g. v14.2.0 → v16.1.0)
+# Make reads the stale paths and aborts with "no rule to make target .../stddef.h".
+# `make clean` in openbios only clears its own dir — subdirs like
+# common/crt0/, modplayer/, and shell/ keep their stale .dep files. Easier to
+# just delete the lot before each build than to teach every Makefile about
+# deepclean recursion.
+Get-ChildItem -Path (join-path $path_pcsx_redux 'src\mips') -Recurse -Filter '*.dep' -ErrorAction SilentlyContinue |
+    ForEach-Object { Remove-Item -LiteralPath $_.FullName -Force }
+
 push-location $path_openbios
 &	make clean
 &	make