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Still learning/de-obfuscating

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ed
2026-07-08 21:17:16 -04:00
parent 74f390c3b1
commit 602a0b46d8
5 changed files with 70 additions and 41 deletions
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code/gte_hello/hello_gte_tape.c
+7 -14
View File
@@ -12,13 +12,6 @@
* (mac_format_f3_color takes _r, _g, _b byte values rather than raw
* 16-bit half-words). */
enum fack {
ah = gp0_cmd_poly_f3 << 8 | 0xFF,
};
void fk() {
(void*)ah;
}
#pragma endregion MACs
#pragma region Baked Atoms
@@ -143,7 +136,7 @@ MipsAtom_(cube_tri) {
nop, /* BD slot */
/* ── 11. Insert into Ordering Table (length = 8 for Poly_G4) ─────────── */
mac_insert_ot_tag(R_T1, 0x0800), /* 0x0800 = 8 << 8 = length 8 in tag */
mac_insert_ot_tag(R_T1, Poly_G4), /* 0x0800 = 8 << 8 = length 8 in tag */
/* ── 12. Advance cursors & yield ─────────────────────────────────────── */
add_ui(R_PrimCursor, R_PrimCursor, 36), /* 9 words × 4 bytes */
@@ -184,9 +177,9 @@ internal
MipsAtom_(floor_tri) {
mac_load_tri_indices(R_T0, R_T1, R_T2),
mac_load_tri_verts( R_T0, R_T1, R_T2),
nop, nop, gte_cmdw_rotate_translate_perspective_triple,
nop, nop, gte_cmdw_nclip,
nop, nop,
nop2, gte_cmdw_rotate_translate_perspective_triple,
nop2, gte_cmdw_nclip,
nop2,
/* Culling (Branch forward if Backface) */
gte_mv_from_data_r(R_T0, C2_MAC0),
nop, branch_le_zero(R_T0, atom_offset(culling, floor_tri_exit)),
@@ -197,15 +190,15 @@ MipsAtom_(floor_tri) {
mac_gte_store_f3(),
/* Calculate Depth */
nop, nop, gte_avg_sort_z3,
nop, nop, gte_mv_from_data_r(R_T1, C2_OTZ),
nop2, gte_avg_sort_z3,
nop2, 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),
branch_equal(R_AT, R_0, atom_offset(bounds_chk, floor_tri_exit)),
nop,
/* Insert into Ordering Table Linked List */
mac_insert_ot_tag(R_T1, 0x0400),
mac_insert_ot_tag(R_T1, Poly_F3),
add_ui_self(R_PrimCursor, S_(Poly_F3)), /* Advance Prim Cursor (5 words) */
// Note(Ed): No bounds checking, should be checked before atom runs.
code/gte_hello/tape_atom.metadata.h
+3 -1
View File
@@ -22,7 +22,6 @@ WORD_COUNT(set_lt_u, 1)
WORD_COUNT(set_lt_s, 1)
WORD_COUNT(set_lt_si, 1)
WORD_COUNT(set_lt_ui, 1)
WORD_COUNT(load_ui, 1)
WORD_COUNT(load_word, 1)
WORD_COUNT(load_half_u, 1)
WORD_COUNT(store_word, 1)
@@ -30,8 +29,11 @@ WORD_COUNT(add_ui_self, 1)
WORD_COUNT(add_u_self, 1)
WORD_COUNT(add_u, 1)
WORD_COUNT(or_i, 1)
WORD_COUNT(or_i_self, 1)
WORD_COUNT(or_u, 1)
WORD_COUNT(or_u_self, 1)
WORD_COUNT(shift_lleft, 1)
WORD_COUNT(shift_lleft_self, 1)
WORD_COUNT(shift_lright, 1)
WORD_COUNT(shift_aright, 1)
WORD_COUNT(mask_upper, 2)