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ed
2026-07-06 13:08:16 -04:00
parent 352a8c9c25
commit ffcd43c1ea
6 changed files with 180 additions and 192 deletions
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code/gte_hello/hello_gte_tape.c
+15 -7
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@@ -5,7 +5,7 @@
# include "gen/hello_gte_tape.offsets.h"
#endif
#pragma region MACs
#pragma region MACs (Mips Atom components)
/* Words: 3; High: 0x20/B, Low: G/R */
#define mac_format_f3_color(color_hi, color_lo) \
@@ -24,17 +24,25 @@
internal MipsAtom_(floor_tri) {
// T0-T2 allocated
mac_load_tri_indices(R_T0, R_T1, R_T2),
mac_load_tri_verts( R_T0, R_T1, R_T2),
// mac_load_tri_indices(R_T0, R_T1, R_T2),
load_half_u(R_T0, R_FaceCur, 0 * S_(S2))
, load_half_u(R_T1, R_FaceCur, 1 * S_(S2))
, load_half_u(R_T2, R_FaceCur, 2 * S_(S2))
,
// mac_load_tri_verts( R_T0, R_T1, R_T2),
shift_ll(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)
, shift_ll(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)
, shift_ll(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)
,
/* 3. Execute Math */
nop, nop, gte_cmdw_rotate_translate_perspective_triple,
nop, nop, gte_cmdw_nclip,
nop, nop,
/* 4. Culling (Branch forward 29 instructions if Backface) */
/* 4. Culling (Branch forward if Backface) */
gte_mf(R_T0, C2_MAC0),
nop, branch_le_zero(R_T0, atom_offset(floor_tri_exit)),
nop, branch_le_zero(R_T0, atom_offset(culling, floor_tri_exit)),
nop,
/* 5. Format Primitive */
@@ -45,10 +53,10 @@ internal MipsAtom_(floor_tri) {
nop, nop, gte_avg_sort_z3,
nop, nop, gte_mf(R_T1, C2_OTZ),
/* 7. Bounds Check OTZ < 2048 (Branch forward 13 instructions to skip insertion) */
/* 7. Bounds Check OTZ < 2048 (Branch forward to skip insertion) */
add_ui( R_AT, R_0, OrderingTbl_Len),
slt_u( R_AT, R_T1, R_AT),
branch_equal(R_AT, R_0, 13),
branch_equal(R_AT, R_0, atom_offset(bounds_chk, floor_tri_exit)),
nop,
/* 8. Insert into Ordering Table Linked List */