mirror of
https://github.com/Ed94/pikuma_ps1.git
synced 2026-07-28 02:10:11 +00:00
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# include "duffle/lottes_tape.h"
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# include "hello_gte.h"
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#endif
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#pragma region MACs
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/* Words: 3; High: 0x20/B, Low: G/R */
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#define mac_format_f3_color(color_hi, color_lo) \
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load_ui(R_AT, color_hi), or_i(R_AT, R_AT, color_lo) \
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, store_word(R_AT, R_PrimCur, O_(Poly_F3,color)) \
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/* Words: 3 */
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#define mac_gte_store_f3() \
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gte_sw(C2_SXY0, R_PrimCur, O_(Poly_F3,p0)) \
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, gte_sw(C2_SXY1, R_PrimCur, O_(Poly_F3,p1)) \
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, gte_sw(C2_SXY2, R_PrimCur, O_(Poly_F3,p2))
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#pragma endregion MACs
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#pragma region Baked Atoms
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internal 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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mac_load_tri_verts( R_T0, R_T1, R_T2),
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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 29 instructions if Backface) */
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gte_mf(R_T0, C2_MAC0),
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nop, branch_le_zero(R_T0, 29),
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nop,
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/* 5. 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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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 13 instructions 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, 13),
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nop,
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/* 8. Insert into Ordering Table Linked List */
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mac_insert_ot_tag(R_T1, 0x0400),
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add_ui(R_PrimCur, R_PrimCur, S_(Poly_F3)), /* Advance Prim Cursor (5 words) */
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/* 9. Advance Input Cursor & Yield (Both branch targets land here) */
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add_ui(R_FaceCur, R_FaceCur, S_(S2) * 4), /* Advance Face Cursor (4 * S2 = 8 bytes) */
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mac_yield()
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};
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#pragma endregion Baked Atoms
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