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Final ideation before finish updates lua metaprogram before hello-cdrom

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ed
2026-08-21 00:23:28 -04:00
parent f1801343e2
commit b2858b3c73
8 changed files with 64 additions and 74 deletions
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code/duffle/gte.atom.c
+10 -10
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@@ -63,10 +63,10 @@ FI_ Slice_MipsCode ac_gte_store_f3(AtomBuilder_R ab, U4 r_primitive_cursor) atom
})
/* Words: 18; Translates indices to vertex addresses and pushes them to GTE */
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_(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)), LdSlot_ 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)), LdSlot_ 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)), LdSlot_ gte_mv_to_data_r(R_V0, C2_VXY2), gte_mv_to_data_r(R_V1, C2_VZ2),
I_ Slice_MipsCode ac_gte_load_tri_verts(AtomBuilder_R ab, Reg vbase, Reg v0, Reg v1, Reg v2) atom_dbg_skip MipsAtomComp_Proc_(ab, {
shift_lleft(R_AT, v0, v3s2_byteoff), add_u_self(R_AT, vbase), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), LdSlot_ gte_mv_to_data_r(R_V0, C2_VXY0), gte_mv_to_data_r(R_V1, C2_VZ0),
shift_lleft(R_AT, v1, v3s2_byteoff), add_u_self(R_AT, vbase), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), LdSlot_ gte_mv_to_data_r(R_V0, C2_VXY1), gte_mv_to_data_r(R_V1, C2_VZ1),
shift_lleft(R_AT, v2, v3s2_byteoff), add_u_self(R_AT, vbase), load_word(R_V0, R_AT, O_(V3_S2,x)), load_word(R_V1, R_AT, O_(V3_S2,z)), LdSlot_ gte_mv_to_data_r(R_V0, C2_VXY2), gte_mv_to_data_r(R_V1, C2_VZ2),
})
/* Words: 3; Stores the 3 transformed (V2_S2 screen) vertices of the
@@ -267,11 +267,11 @@ internal S2 const gte_normalize_sqr_tbl[192] align_(2) = {
0x0820, 0x081c, 0x0818, 0x0814, 0x0810, 0x080c, 0x0808, 0x0804,
};
typedef Struct_(Binds_NormalizeV3S4) {
typedef Struct_(Binds_normalize_v3s4) {
U2 src_offset; /* offset of src V3_S4 within the BIOS scratchpad */
U2 dst_offset; /* offset of dst V3_S4 within the BIOS scratchpad */
};
typedef Struct_(RegUse_build_normalize_v3s4) {
typedef Struct_(RegUse_normalize_v3s4) {
union { Reg_(V3_S4) res, src; };
union { Reg r0, src_ptr, mac2; };
union { Reg r1, dst_ptr; };
@@ -282,13 +282,13 @@ typedef Struct_(RegUse_build_normalize_v3s4) {
};
/* ─── Full normalize (all 4 stages inline) ───
* Generic 4-stage GTE normalize (SQR → sum+LZCR → align+sqrtbl → GPF+srav). */
internal MipsAtom* build_normalize_v3s4(AtomArena_R aa, RegUse_build_normalize_v3s4 r)
internal MipsAtom* normalize_v3s4(AtomArena_R aa, RegUse_normalize_v3s4 r)
MipsAtom_Proc_(aa, {
load_half(r.src_offset, R_TapePtr, O_(Binds_NormalizeV3S4, src_offset)),
load_half(r.dst_offset, R_TapePtr, O_(Binds_NormalizeV3S4, dst_offset)),
load_half(r.src_offset, R_TapePtr, O_(Binds_normalize_v3s4, src_offset)),
load_half(r.dst_offset, R_TapePtr, O_(Binds_normalize_v3s4, dst_offset)),
LdSlot_ add_u(r.src_ptr, R_ScratchBase, r.src_offset),
LdSlot_ add_u(r.dst_ptr, R_ScratchBase, r.dst_offset),
LdSlot_ add_ui_self(R_TapePtr, S_(Binds_NormalizeV3S4)),
LdSlot_ add_ui_self(R_TapePtr, S_(Binds_normalize_v3s4)),
mac_load_v3s4(r.src, r.src_ptr, 0),