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improving dsl: gte.

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This commit is contained in:
Edward R. Gonzalez
2026-07-08 00:37:27 -04:00
parent d0b1bae896
commit 10c8dcdc07
5 changed files with 183 additions and 45 deletions
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code/gte_hello/hello_gte_tape.c
+8 -8
View File
@@ -75,17 +75,17 @@ MipsAtom_(cube_tri) {
/* V0 = verts[face->x] */
shift_lleft(R_AT, R_T0, 3), add_u(R_AT, R_AT, R_VertBase),
load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
gte_mt(R_V0, C2_VXY0), gte_mt(R_V1, C2_VZ0),
gte_mv_to_data_r(R_V0, C2_VXY0), gte_mv_to_data_r(R_V1, C2_VZ0),
/* V1 = verts[face->y] */
shift_lleft(R_AT, R_T1, 3), add_u(R_AT, R_AT, R_VertBase),
load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
gte_mt(R_V0, C2_VXY1), gte_mt(R_V1, C2_VZ1),
gte_mv_to_data_r(R_V0, C2_VXY1), gte_mv_to_data_r(R_V1, C2_VZ1),
/* V2 = verts[face->z] */
shift_lleft(R_AT, R_T2, 3), add_u(R_AT, R_AT, R_VertBase),
load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
gte_mt(R_V0, C2_VXY2), gte_mt(R_V1, C2_VZ2),
gte_mv_to_data_r(R_V0, C2_VXY2), gte_mv_to_data_r(R_V1, C2_VZ2),
/* ── 3. RTPT — transforms V0/V1/V2 → SXY0/SXY1/SXY2 + SZ1/SZ2/SZ3 ─── */
nop, nop, gte_cmdw_rtpt,
@@ -96,7 +96,7 @@ MipsAtom_(cube_tri) {
nop, nop,
/* ── 5. Cull check: skip format/insert if MAC0 ≤ 0 (backface) ───────── */
gte_mf(R_T0, C2_MAC0),
gte_mv_from_data_r(R_T0, C2_MAC0),
nop,
branch_le_zero(R_T0, 49), /* Skip 49 if MAC0 ≤ 0 (backface) → cull */
nop, /* BD slot */
@@ -132,7 +132,7 @@ MipsAtom_(cube_tri) {
/* ── 7. Load V3 = verts[face->w] into V0 ─────────────────────────────── */
shift_lleft(R_AT, R_T3, 3), add_u(R_AT, R_AT, R_VertBase),
load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
gte_mt(R_V0, C2_VXY0), gte_mt(R_V1, C2_VZ0),
gte_mv_to_data_r(R_V0, C2_VXY0), gte_mv_to_data_r(R_V1, C2_VZ0),
/* ── 8. RTPS — transforms V0 (now V3) → SXY0 (p3) + SZ0 ─────────────── */
nop, nop, gte_cmdw_rtps,
@@ -143,7 +143,7 @@ MipsAtom_(cube_tri) {
/* ── 9. AVSZ4 — average Z from SZ0/SZ1/SZ2/SZ3 ────────────── */
nop, nop, gte_cmdw_avsz4,
nop, nop,
gte_mf(R_T1, C2_OTZ),
gte_mv_from_data_r(R_T1, C2_OTZ),
/* ── 10. Bounds check OTZ < 2048 ─────────────────────────────────────── */
add_ui( R_AT, R_0, 2048),
@@ -197,7 +197,7 @@ MipsAtom_(floor_tri) {
nop, nop, gte_cmdw_nclip,
nop, nop,
/* Culling (Branch forward if Backface) */
gte_mf(R_T0, C2_MAC0),
gte_mv_from_data_r(R_T0, C2_MAC0),
nop, branch_le_zero(R_T0, atom_offset(culling, floor_tri_exit)),
nop,
/* Format Primitive */
@@ -206,7 +206,7 @@ MipsAtom_(floor_tri) {
mac_gte_store_f3(),
/* Calculate Depth */
nop, nop, gte_avg_sort_z3,
nop, nop, gte_mf(R_T1, C2_OTZ),
nop, nop, gte_mv_from_data_r(R_T1, C2_OTZ),
/* Bounds Check OTZ < 2048 (Branch forward to skip insertion) */
add_ui( R_AT, R_0, OrderingTbl_Len),
set_lt_u( R_AT, R_T1, R_AT),
code/gte_hello/tape_atom.metadata.h
+4 -3
View File
@@ -35,9 +35,10 @@ WORD_COUNT(shift_lleft, 1)
WORD_COUNT(shift_lright, 1)
WORD_COUNT(shift_aright, 1)
WORD_COUNT(mask_upper, 2)
WORD_COUNT(gte_mf, 1)
WORD_COUNT(gte_mt, 1)
WORD_COUNT(gte_ct, 1)
WORD_COUNT(gte_mv_from_data_r, 1)
WORD_COUNT(gte_mv_from_ctrl_r, 1)
WORD_COUNT(gte_mv_to_data_r, 1)
WORD_COUNT(gte_mv_to_ctrl_r, 1)
WORD_COUNT(gte_sw, 1)
WORD_COUNT(gte_cmdw_rtpt, 1)
WORD_COUNT(gte_cmdw_nclip, 1)