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https://github.com/Ed94/pikuma_ps1.git
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67 lines
3.2 KiB
C
67 lines
3.2 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# include "dsl.h"
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# include "gp.h"
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# include "lottes_tape.h"
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#endif
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ATOM_FILE_DEBUGGER_LINE_MARKER(gp_atom_c);
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#pragma region MACs (Mips Atom Components)
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FI_ Slice_MipsCode ac_gcmd_push(U4 cmd, U4 reg_transfer, U4 reg_base, U2 port)
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MipsAtomComp_Proc_(ac_gcmd_push, {
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load_upper_i(reg_transfer, cmd >> 16),
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or_i_self( reg_transfer, cmd & 0xFFFF),
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store_word( reg_transfer, reg_base, port),
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})
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FI_ Slice_MipsCode ac_store_rgb8(U1 rr, U1 rg, U1 rb, U4 base, U4 offset) atom_dbg_skip MipsAtomComp_Proc_(ac_store_rgb8, {
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store_byte(rr, base, offset + O_(RGB8,r)),
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store_byte(rg, base, offset + O_(RGB8,g)),
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store_byte(rb, base, offset + O_(RGB8,b)),
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})
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/* Words: 3; Emits one (cmd|color) word to R_PrimCursor at the given
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* byte offset. Internal helper used by the *_format_*_color macros. */
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FI_ Slice_MipsCode ac_pack_color_word(U4 r_base, U4 off, U4 cmd, U1 r, U1 g, U1 b)
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atom_dbg_skip MipsAtomComp_Proc_(ac_pack_color_word, {
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load_upper_i(R_AT, (cmd) << 8 | (b)),
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or_i_self( R_AT, ((g) << 8) | (r)),
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store_word( R_AT, r_base, (off)),
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})
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/* Words: 3; Emits the F3 command+color word (cmd byte | BLUE | GREEN | RED)
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* Args: _r, _g, _b are 8-bit RGB byte values (not raw 16-bit fields). */
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FI_ Slice_MipsCode ac_format_f3_color(U4 r_base, U1 r, U1 g, U1 b)
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atom_dbg_skip MipsAtomComp_Proc_(ac_format_f3_color, { mac_pack_color_word(r_base, O_(Poly_F3,color), gp0_cmd_poly_f3, r, g, b) })
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/* Words: 12; Emits the four (code|color) words of a Poly_G4.
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* Args: rN,gN,bN are 8-bit RGB byte values for each of the 4 vertices. */
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FI_ Slice_MipsCode ac_format_g4_color(U4 r_prim_cursor,
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U1 r0, U1 g0, U1 b0,
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U1 r1, U1 g1, U1 b1,
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U1 r2, U1 g2, U1 b2,
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U1 r3, U1 g3, U1 b3)
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MipsAtomComp_Proc_(ac_format_g4_color, {
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mac_pack_color_word(r_prim_cursor, O_(Poly_G4,c0), gp0_cmd_poly_g4, r0,g0,b0),
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mac_pack_color_word(r_prim_cursor, O_(Poly_G4,c1), 0, r1,g1,b1),
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mac_pack_color_word(r_prim_cursor, O_(Poly_G4,c2), 0, r2,g2,b2),
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mac_pack_color_word(r_prim_cursor, O_(Poly_G4,c3), 0, r3,g3,b3),
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})
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/* Words: 11; Correctly inserts a primitive into the Ordering Table linked list. */
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I_ Slice_MipsCode ac_insert_ot_tag(U4 r_ot_base, U4 r_prim_cursor, U4 poly_size) MipsAtomComp_Proc_(ac_insert_ot_tag, {
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shift_lleft( R_T1, R_T1, S_(U4)/2), // T1 = otz * S_(U4) (otz arg is implicit R_T1)
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add_u_self( R_T1, r_ot_base), // T1 = & OrderingTable[OTZ]
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load_word( R_AT, R_T1, O_(PolyTag,code)), // AT = old_ot_head
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load_upper_i(R_V0, (poly_size/S_(U4) - S_(PolyTag)/S_(U4)) << PolyTag_len_bits),
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mask_upper( R_AT, R_AT, S_(PolyTag_len_bits)), // Strip upper 8 bits (length from prev cell) → keep only low 24
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or_u( R_AT, R_AT, R_V0), // Merge length
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store_word( R_AT, r_prim_cursor, O_(PolyTag,code)), // prim->tag = packed(prim_length, old_addr)
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shift_lleft( R_AT, r_prim_cursor, S_(PolyTag_len_bits)), // AT = (prim_length << 24) | old_addr
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shift_lright(R_AT, R_AT, S_(PolyTag_len_bits)),
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store_word( R_AT, R_T1, O_(PolyTag,code)), // OrderingTable[OTZ] = PrimCursor
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})
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#pragma endregion MACs (Mips Atom Components)
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