mirror of
https://github.com/Ed94/pikuma_ps1.git
synced 2026-08-06 07:38:47 +00:00
WIP: still adjusting, deofuscating with annotation...
Problably will redesign the atom annotation DSL its too much curft rn, should be alot simpiler...
This commit is contained in:
+163
-28
@@ -23,6 +23,157 @@
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#pragma region Baked Atoms
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typedef Struct_(Binds_CubeTri) {
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U4 PrimCursor;
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U4 FaceCursor;
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U4 VertBase;
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U4 OtBase;
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};
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internal MipsAtom_(rbind_cube_tri) {
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/* Pop 4 arguments from the tape directly into the workspace registers */
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load_word(R_PrimCursor, R_TapePtr, O_(Binds_CubeTri,PrimCursor)),
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load_word(R_FaceCursor, R_TapePtr, O_(Binds_CubeTri,FaceCursor)),
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load_word(R_VertBase, R_TapePtr, O_(Binds_CubeTri,VertBase)),
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load_word(R_OtBase, R_TapePtr, O_(Binds_CubeTri,OtBase)),
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add_ui_1( R_TapePtr, S_(Binds_CubeTri)),
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// Note(Ed): This entire thing is argument shuffle?
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// TODO(Ed): Eliminate
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mac_yield()
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};
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/* ============================================================================
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* cube_tri — Draw one cube face (Gouraud-shaded quad) via the GTE tape pipeline
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* ============================================================================
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*
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* Reads 4 indices from R_FaceCur (V4_S2 = 8 bytes), loads 4 vertices into
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* the GTE, runs the PsyQ RotAverageNclip4 sequence, and renders a Poly_G4.
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*/
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atom_region (cube_tri, REGION_PRIM_ARENA)
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atom_group (cube_tri, GROUP_RENDER_PRIMS)
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atom_cadence (cube_tri, CADENCE_FRAME)
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atom_annot(cube_tri, phase_work,
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tape_regs(R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase),
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tape_regs(R_PrimCursor, R_FaceCursor))
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internal
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MipsAtom_(cube_tri) {
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/* ── 1. Load 4 face indices from R_FaceCur ──────────────────────────── */
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load_half_u(R_T0, R_FaceCursor, 0), /* T0 = face->x (vertex 0 index) */
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load_half_u(R_T1, R_FaceCursor, 2), /* T1 = face->y (vertex 1 index) */
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load_half_u(R_T2, R_FaceCursor, 4), /* T2 = face->z (vertex 2 index) */
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load_half_u(R_T3, R_FaceCursor, 6), /* T3 = face->w (vertex 3 index) */
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/* ── 2. Load V0, V1, V2 into GTE ────────────────────────────────────── */
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/* V0 = verts[face->x] */
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shift_ll(R_AT, R_T0, 3), add_u(R_AT, R_AT, R_VertBase),
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load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
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gte_mt(R_V0, C2_VXY0), gte_mt(R_V1, C2_VZ0),
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/* V1 = verts[face->y] */
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shift_ll(R_AT, R_T1, 3), add_u(R_AT, R_AT, R_VertBase),
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load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
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gte_mt(R_V0, C2_VXY1), gte_mt(R_V1, C2_VZ1),
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/* V2 = verts[face->z] */
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shift_ll(R_AT, R_T2, 3), add_u(R_AT, R_AT, R_VertBase),
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load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
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gte_mt(R_V0, C2_VXY2), gte_mt(R_V1, C2_VZ2),
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/* ── 3. RTPT — transforms V0/V1/V2 → SXY0/SXY1/SXY2 + SZ1/SZ2/SZ3 ─── */
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nop, nop, gte_cmdw_rtpt,
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/* ── 4. NCLIP — backface culling on SXY0/SXY1/SXY2 (p0,p1,p2) ──────── */
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/* MUST be done BEFORE RTPS overwrites SXY0 with p3! */
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nop, nop, gte_cmdw_nclip,
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nop, nop,
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/* ── 5. Cull check: skip format/insert if MAC0 ≤ 0 (backface) ───────── */
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gte_mf(R_T0, C2_MAC0),
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nop,
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branch_le_zero(R_T0, 49), /* Skip 49 if MAC0 ≤ 0 (backface) → cull */
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nop, /* BD slot */
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/* ── 6. Store p0,p1,p2 to primitive buffer (BEFORE RTPS overwrites) ─── */
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store_word(R_0, R_PrimCursor, 0),
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/* Word 1: c0 (BGR) + code = 0x38FF00FF (magenta, opcode 0x38) */
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load_ui(R_AT, 0x38FF), or_i(R_AT, R_AT, 0x00FF),
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store_word(R_AT, R_PrimCursor, 4),
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/* Word 2: p0 = SXY0 (stored BEFORE RTPS overwrites it) */
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gte_sw(C2_SXY0, R_PrimCursor, 8),
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/* Word 3: c1 (BGR) + pad = 0x0000FFFF (yellow) */
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load_ui(R_AT, 0x0000), or_i(R_AT, R_AT, 0xFFFF),
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store_word(R_AT, R_PrimCursor, 12),
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/* Word 4: p1 = SXY1 */
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gte_sw(C2_SXY1, R_PrimCursor, 16),
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/* Word 5: c2 (BGR) + pad = 0x00FFFF00 (cyan) */
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load_ui(R_AT, 0x00FF), or_i(R_AT, R_AT, 0xFF00),
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store_word(R_AT, R_PrimCursor, 20),
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/* Word 6: p2 = SXY2 */
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gte_sw(C2_SXY2, R_PrimCursor, 24),
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/* Word 7: c3 (BGR) + pad = 0x0000FF00 (green) */
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load_ui(R_AT, 0x0000), or_i(R_AT, R_AT, 0xFF00),
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store_word(R_AT, R_PrimCursor, 28),
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/* ── 7. Load V3 = verts[face->w] into V0 ─────────────────────────────── */
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shift_ll(R_AT, R_T3, 3), add_u(R_AT, R_AT, R_VertBase),
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load_word(R_V0, R_AT, 0), load_word(R_V1, R_AT, 4),
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gte_mt(R_V0, C2_VXY0), gte_mt(R_V1, C2_VZ0),
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/* ── 8. RTPS — transforms V0 (now V3) → SXY0 (p3) + SZ0 ─────────────── */
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nop, nop, gte_cmdw_rtps,
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/* Word 8: p3 = SXY0 (written AFTER RTPS with V3's screen coords) */
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gte_sw(C2_SXY0, R_PrimCursor, 32),
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/* ── 9. AVSZ4 — average Z from SZ0/SZ1/SZ2/SZ3 ────────────── */
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nop, nop, gte_cmdw_avsz4,
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nop, nop,
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gte_mf(R_T1, C2_OTZ),
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/* ── 10. Bounds check OTZ < 2048 ─────────────────────────────────────── */
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add_ui( R_AT, R_0, 2048),
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slt_u( R_AT, R_T1, R_AT),
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branch_equal(R_AT, R_0, 13), /* Skip 13 → land at add_ui(R_FaceCur,...) */
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nop, /* BD slot */
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/* ── 11. Insert into Ordering Table (length = 8 for Poly_G4) ─────────── */
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mac_insert_ot_tag(R_T1, 0x0800), /* 0x0800 = 8 << 8 = length 8 in tag */
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/* ── 12. Advance cursors & yield ─────────────────────────────────────── */
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add_ui(R_PrimCursor, R_PrimCursor, 36), /* 9 words × 4 bytes */
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add_ui(R_FaceCursor, R_FaceCursor, 8), /* 4 × S2 = 8 bytes */
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mac_yield()
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};
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typedef Struct_(Binds_FloorTri) {
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U4 PrimCursor;
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U4 FaceCursor;
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U4 VertBase;
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U4 OtBase;
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};
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atom_region(rbind_floor_tri, REGION_PRIM_ARENA)
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atom_group(rbind_floor_tri, GROUP_RENDER_FLOOR)
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atom_cadence(rbind_floor_tri, CADENCE_FRAME)
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atom_annot(rbind_floor_tri, phase_bind
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, atom_reads()
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, atom_writes(R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase))
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internal
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MipsAtom_(rbind_floor_tri) {
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/* Pop 4 arguments from the tape directly into the workspace registers */
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load_word(R_PrimCursor, R_TapePtr, O_(Binds_FloorTri,PrimCursor)),
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load_word(R_FaceCursor, R_TapePtr, O_(Binds_FloorTri,FaceCursor)),
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load_word(R_VertBase, R_TapePtr, O_(Binds_FloorTri,VertBase)),
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load_word(R_OtBase, R_TapePtr, O_(Binds_FloorTri,OtBase)),
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add_ui_1( R_TapePtr, S_(Binds_FloorTri)),
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mac_yield()
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};
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atom_region( floor_tri, REGION_PRIM_ARENA)
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atom_group( floor_tri, GROUP_RENDER_FLOOR)
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atom_cadence(floor_tri, CADENCE_FRAME)
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@@ -31,54 +182,38 @@
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atom_writes(R_PrimCursor, R_FaceCursor))
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internal
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MipsAtom_(floor_tri) {
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// T0-T2 allocated
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mac_load_tri_indices(R_T0, R_T1, R_T2),
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// load_half_u(R_T0, R_FaceCur, 0 * S_(S2))
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// , load_half_u(R_T1, R_FaceCur, 1 * S_(S2))
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// , load_half_u(R_T2, R_FaceCur, 2 * S_(S2))
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// ,
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mac_load_tri_verts( R_T0, R_T1, R_T2),
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// 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)
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// , 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)
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// , 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)
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// ,
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/* 3. Execute Math */
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nop, nop, gte_cmdw_rotate_translate_perspective_triple,
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nop, nop, gte_cmdw_nclip,
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nop, nop,
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/* 4. Culling (Branch forward if Backface) */
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/* Culling (Branch forward if Backface) */
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gte_mf(R_T0, C2_MAC0),
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nop, branch_le_zero(R_T0, atom_offset(culling, floor_tri_exit)),
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nop,
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/* 5. Format Primitive */
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/* Format Primitive */
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mac_format_f3_color(0x20FF, 0xFFFF),
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mac_gte_store_f3(),
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/* 6. Calculate Depth */
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/* Calculate Depth */
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nop, nop, gte_avg_sort_z3,
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nop, nop, gte_mf(R_T1, C2_OTZ),
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/* 7. Bounds Check OTZ < 2048 (Branch forward to skip insertion) */
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/* Bounds Check OTZ < 2048 (Branch forward to skip insertion) */
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add_ui( R_AT, R_0, OrderingTbl_Len),
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slt_u( R_AT, R_T1, R_AT),
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branch_equal(R_AT, R_0, atom_offset(bounds_chk, floor_tri_exit)),
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nop,
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/* 8. Insert into Ordering Table Linked List */
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/* Insert into Ordering Table Linked List */
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mac_insert_ot_tag(R_T1, 0x0400),
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add_ui_1(R_PrimCursor, S_(Poly_F3)), /* Advance Prim Cursor (5 words) */
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// Note(Ed): No bounds checking, should be checked before atom runs.
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// Note(Ed): No bounds checking, should be checked before atom runs.
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/* 9. Advance Input Cursor & Yield (Both branch targets land here) */
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atom_label(floor_tri_exit)
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/* Advance Input Cursor & Yield (Both branch targets land here) */
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atom_label(floor_tri_exit)
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add_ui_1(R_FaceCursor, S_(S2) * 4), /* Advance Face Cursor (4 * S2 = 8 bytes) */
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mac_yield()
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};
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typedef Struct_(Binds_SyncPrimitiveArena) { U4 PrimtiveArena_Used; U4 PrimtiveBase; };
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typedef Struct_(Binds_SyncPrimitiveArena) { U4 used; U4 cursor; };
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atom_region( sync_primitive_arena, REGION_PRIM_ARENA)
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atom_group( sync_primitive_arena, GROUP_RENDER_FLOOR)
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atom_cadence(sync_primitive_arena, CADENCE_FRAME)
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@@ -86,11 +221,11 @@ typedef Struct_(Binds_SyncPrimitiveArena) { U4 PrimtiveArena_Used; U4 PrimtiveBa
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atom_reads( R_TapePtr, R_PrimCursor),
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atom_writes(R_TapePtr))
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internal MipsAtom_(sync_primitive_arena) {
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load_word(R_AT, R_TapePtr, O_(Binds_SyncPrimitiveArena,PrimtiveArena_Used)),
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load_word(R_T0, R_TapePtr, O_(Binds_SyncPrimitiveArena,PrimtiveBase)),
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load_word(R_AT, R_TapePtr, O_(Binds_SyncPrimitiveArena,used)),
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load_word(R_T0, R_TapePtr, O_(Binds_SyncPrimitiveArena,cursor)),
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add_ui_1( R_TapePtr, S_(Binds_SyncPrimitiveArena)),
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/* Calculate byte offset and store directly back to RAM */
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sub_u( R_T0, R_PrimCursor, R_T0), // R_T0 = R_PrimCursor - prim-base
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sub_u( R_T0, R_PrimCursor, R_T0), // R_T0 = R_PrimCursor - binds.cursor
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store_word(R_T0, R_AT, 0), // R_AT[0] = R_T0
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mac_yield()
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};
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