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gp.h improvements

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ed
2026-07-08 10:21:31 -04:00
parent 10c8dcdc07
commit 5375478044
9 changed files with 725 additions and 334 deletions
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code/duffle/lottes_tape.h
+19 -4
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@@ -112,13 +112,28 @@ FI_ Slice_U4 tb_slice(TapeBuilder tb) { return (Sli
, add_u( R_T1, R_T1, R_OtBase) /* T1 = & OrderingTable[OTZ] */ \
, load_word( R_AT, R_T1, O_(PolyTag,bf_addr_len)) /* AT = old_ot_head */ \
, load_upper_i(R_V0, prim_length) /* V0 = prim_length << 16 (high 16 bits of a tag) */ \
, mask_upper( R_AT, R_AT, S_(PolyTag_len_bits)) /* Strip upper 8 bits (length from prev cell) → keep only low 24 */ \
, mask_upper( R_AT, R_AT, S_(polytag_len_bits)) /* Strip upper 8 bits (length from prev cell) → keep only low 24 */ \
, or_u( R_AT, R_AT, R_V0) /* Merge length */ \
, store_word( R_AT, R_PrimCursor, O_(PolyTag,bf_addr_len)) /* prim->tag = packed(prim_length, old_addr) */ \
, shift_lleft( R_AT, R_PrimCursor, S_(PolyTag_len_bits)) /* AT = (prim_length << 24) | old_addr */ \
, shift_lright(R_AT, R_AT, S_(PolyTag_len_bits)) \
, shift_lleft( R_AT, R_PrimCursor, S_(polytag_len_bits)) /* AT = (prim_length << 24) | old_addr */ \
, shift_lright(R_AT, R_AT, S_(polytag_len_bits)) \
, store_word( R_AT, R_T1, O_(PolyTag,bf_addr_len)) /* OrderingTable[OTZ] = PrimCursor */
/* Words: 3; Emits the F3 command+color word (cmd byte | BLUE | GREEN | RED)
* Args: _r, _g, _b are 8-bit RGB byte values (not raw 16-bit fields).
* Migrated from hello_gte_tape.c; takes RGB form per the Phase 3
* convention. */
#define mac_format_f3_color(_r, _g, _b) \
load_upper_i( R_AT, gp0_cmd_poly_f3 << 8 | (_b)) \
, or_i( R_AT, R_AT, ((_g) << 8) | (_r)) \
, store_word(R_AT, R_PrimCursor, O_(Poly_F3,color))
/* Words: 3; Stores the 3 transformed (V2_S2 screen) vertices to the F3 */
#define mac_gte_store_f3() \
gte_sw(C2_SXY0, R_PrimCursor, O_(Poly_F3,p0)) \
, gte_sw(C2_SXY1, R_PrimCursor, O_(Poly_F3,p1)) \
, gte_sw(C2_SXY2, R_PrimCursor, O_(Poly_F3,p2))
#pragma endregion Macro Atom Components
#pragma region Mips Atom Builder
@@ -212,7 +227,7 @@ internal MipsAtom_(diag_yield) { mac_yield() };
/* DIAGNOSTIC 2: Pure memory test (No GTE). Draws a fixed cyan triangle. */
internal MipsAtom_(diag_color) {
store_word( R_0, R_T7, 0),
load_upper_i(R_AT, gcmd_poly_f3 << 8 | 0xFF), /* High: MipsCode Poly_F3(0x20) + Color B:FF */
load_upper_i(R_AT, gp0_cmd_poly_f3 << 8 | 0xFF), /* High: MipsCode Poly_F3(0x20) + Color B:FF */
or_i( R_AT, R_AT, 0xFF00), /* Low: Color G:FF, R:00 (Cyan) */
store_word( R_AT, R_T7, 4),