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ed
2026-08-12 20:24:13 -04:00
parent 2e07665920
commit 77f19321cd
3 changed files with 28 additions and 31 deletions
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code/duffle/gte.atom.c
+12 -15
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@@ -126,12 +126,14 @@ FI_ Slice_MipsCode ac_apply_matrix_lv(AtomBuilder_R ab
load_word(r_t0, r_vec, 4), nop,
gte_lw(C2_VZ0, r_vec, 4),
/* RTPS cv=1 (no translation accumulation; BK is zero-initialized), sf=0, v=0, mx=0.
/* RTPS cv=3 (no translation contribution: TRX/TRY/TRZ are zeroed, BK is zero-initialized),
* sf=1 (integer, no shift = full 32-bit R*pos product), v=0 (uses V0 input), mx=0 (rotation matrix).
* MAC1 = RT11*V0.x + RT12*V0.y + RT13*V0.z + 0
* MAC2 = RT21*V0.x + RT22*V0.y + RT23*V0.z + 0
* MAC3 = RT31*V0.x + RT32*V0.y + RT33*V0.z + 0
* Side effect: RTPS also writes SXY0/1/2 and SZ0..SZ3 (perspective projection). Ignored. */
// gte_cmdw_rtps_no_tr,
* Side effect: RTPS also writes SXY0/1/2 and SZ0..SZ3 (perspective projection). Ignored.
* Note: gte_cmdw_rtps_no_tr (the cv=3 alias) was removed from gte.h. Use gte_cmdw_rtps_sf1. */
gte_cmdw_rtps_sf1,
/* Read MAC1/2/3 → out. */
gte_mv_from_data_r(r_t0, C2_MAC1),
@@ -145,26 +147,21 @@ FI_ Slice_MipsCode ac_apply_matrix_lv(AtomBuilder_R ab
/* ─── TRANS MATRIX (libgte TransMatrix port) ───
* Atom component — auto-generates mac_trans_matrix Mac composer macro.
* m->t += off. Uses 2 GPRs via per-axis load-delay-slot pattern.
* Words: 12. Clobbers: r_t0, r_t1. */
* 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_t0, U4 r_t1
, U4 r_t1
) MipsAtomComp_Proc_(ac_trans_matrix, ab, {
load_word(r_t0, r_mtx, O_(MT3_S2S4,t[0])),
load_word(r_t1, r_off, O_(V3_S4,x)),
add_u(r_t0, r_t0, r_t1),
store_word(r_t0, r_mtx, O_(MT3_S2S4,t[0])),
store_word(r_t1, r_mtx, O_(MT3_S2S4,t[0])),
load_word(r_t0, r_mtx, O_(MT3_S2S4,t[1])),
load_word(r_t1, r_off, O_(V3_S4,y)),
add_u(r_t0, r_t0, r_t1),
store_word(r_t0, r_mtx, O_(MT3_S2S4,t[1])),
store_word(r_t1, r_mtx, O_(MT3_S2S4,t[1])),
load_word(r_t0, r_mtx, O_(MT3_S2S4,t[2])),
load_word(r_t1, r_off, O_(V3_S4,z)),
add_u(r_t0, r_t0, r_t1),
store_word(r_t0, r_mtx, O_(MT3_S2S4,t[2])),
store_word(r_t1, r_mtx, O_(MT3_S2S4,t[2])),
})
#pragma endregion MACs (Mips Atom Components)