ed/pikuma_ps1
1
0
Fork 0
mirror of https://github.com/Ed94/pikuma_ps1.git synced 2026-07-12 20:31:25 -07:00
Code Issues Packages Projects Releases Wiki Activity

more intiution...

Browse Source
This commit is contained in:
Edward R. Gonzalez
2026-07-09 13:30:13 -04:00
parent 4d177bc34d
commit ccdf1b832b
5 changed files with 64 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files
code/duffle/gte.h
+4 -1
View File
@@ -1,4 +1,4 @@
/* ============================================================================
/* ============================================================================
* duffle DSL Suffix Conventions
* ============================================================================
*
@@ -442,6 +442,7 @@ enum { _C2_TX_SUBS_ = 0
#define gte_cmdw_op (gte_cmd_base | enc_gte_cmd(gte_cmd_op ))
#define gte_cmdw_mvmva (gte_cmd_base | enc_gte_cmd(gte_cmd_mvmva))
#define gte_cmdw_rotate_translate_perspective_single gte_cmdw_rtps
#define gte_cmdw_rotate_translate_perspective_triple gte_cmdw_rtpt
/* PsyQ compatibility bits for AVSZ3 (Bits 20, 22, 24 must be set) */
@@ -457,6 +458,8 @@ enum { _C2_TX_SUBS_ = 0
#define gte_cmd_avsz4 0x2E
#define gte_cmdw_avsz4 (gte_cmd_base | enc_gte_cmd(gte_cmd_avsz4) | gte_cmdw_psyq_avsz3_compat)
#define gte_cmdw_avg_sort_z4 gte_cmdw_avsz4
/**
* @brief Loads a single SVECTOR to GTE vector register V0
*
code/duffle/lottes_tape.h
+31 -13
View File
@@ -124,8 +124,8 @@ FI_ Slice_U4 tb_slice(TapeBuilder tb) { return (Sli
* Args: off = U4 byte offset, code = GP0 cmd byte (0 for c1/c2/c3 of
* a Poly_G4), r/g/b = 8-bit RGB byte values. */
#define mac_pack_color_word(off, code, r,g,b) \
load_upper_i(R_AT, (code) << 8 | (b)) \
, or_i_self( R_AT, ((g) << 8) | (r)) \
load_upper_i(R_AT, (code) << 8 | (b)) \
, or_i_self( R_AT, ((g) << 8) | (r)) \
, store_word( R_AT, R_PrimCursor, (off))
/* Words: 3; Emits the F3 command+color word (cmd byte | BLUE | GREEN | RED)
@@ -134,8 +134,11 @@ FI_ Slice_U4 tb_slice(TapeBuilder tb) { return (Sli
* convention. */
#define mac_format_f3_color(r,g,b) mac_pack_color_word(O_(Poly_F3,color), gp0_cmd_poly_f3, r,g,b)
/* Words: 3; Stores the 3 transformed (V2_S2 screen) vertices to the F3 */
#define mac_gte_store_f3() \
/* 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).
* The macro name declares the pipeline position; check #6 (GTE state-
* machine validation) verifies the call site matches the declaration. */
#define mac_gte_store_f3_post_rtpt() \
gte_sw(C2_SXY0, R_PrimCursor, O_(Poly_F3,p0)) \
, gte_sw(C2_SXY1, R_PrimCursor, O_(Poly_F3,p1)) \
, gte_sw(C2_SXY2, R_PrimCursor, O_(Poly_F3,p2))
@@ -149,17 +152,32 @@ FI_ Slice_U4 tb_slice(TapeBuilder tb) { return (Sli
, mac_pack_color_word(O_(Poly_G4,c3), 0, r3,g3,b3)
/* Words: 3; Stores the 3 transformed (V2_S2 screen) vertices of the
* G4 triangle portion to p0/p1/p2. Call BEFORE the V3-RTPS, otherwise
* SXY0/SXY1/SXY2 get overwritten by the perspective transform. */
#define mac_gte_store_g4_tri() \
gte_sw(C2_SXY0, R_PrimCursor, O_(Poly_G4,p0)) \
, gte_sw(C2_SXY1, R_PrimCursor, O_(Poly_G4,p1)) \
* G4 triangle portion to p0/p1/p2.
* 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).
* The macro name declares the pipeline position; check #6 (GTE state-
* machine validation) verifies the call site matches the declaration. */
#define mac_gte_store_g4_p012_post_rtpt_pre_rtps() \
gte_sw(C2_SXY0, R_PrimCursor, O_(Poly_G4,p0)) \
, gte_sw(C2_SXY1, R_PrimCursor, O_(Poly_G4,p1)) \
, gte_sw(C2_SXY2, R_PrimCursor, O_(Poly_G4,p2))
/* Words: 1; Stores the V3 screen coord (now in SXY2 after V3-RTPS — RTPS
* writes its result into SXY2, not SXY0) to the G4's p3 slot.
* Call AFTER the V3-RTPS. */
#define mac_gte_store_g4_p3() gte_sw(C2_SXY2, R_PrimCursor, O_(Poly_G4,p3))
/* Words: 1; Stores the V3 screen coord to the G4's p3 slot.
* 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 — DO NOT read SXY0 here, that's the bug this name
* prevents).
* The macro name declares the pipeline position; check #6 (GTE state-
* machine validation) verifies the call site matches the declaration.
*
* History: this macro was named `mac_gte_store_g4_p3` until 2026-07-09
* when it was discovered to be reading C2_SXY0 (which held v0.screen)
* instead of C2_SXY2 (which holds v3.screen after RTPS). The rename
* encodes the pipeline position in the name so the next bug of this
* class is impossible. */
#define mac_gte_store_g4_p3_post_rtps() gte_sw(C2_SXY2, R_PrimCursor, O_(Poly_G4,p3))
#pragma endregion Macro Atom Components