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https://github.com/Ed94/pikuma_ps1.git
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644 lines
32 KiB
C
644 lines
32 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# pragma once
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# include "duffle/gen/macs.h"
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# include "duffle/gen/offsets.h"
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# include "duffle/dsl.atom.h"
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# include "duffle/lottes_tape.h"
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# include "duffle/mips.h"
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# include "duffle/gte.h"
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# include "duffle/gp.h"
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# include "duffle/pad.h"
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# include "duffle/word_count.metadata.h"
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# include "duffle/psyq.h"
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# include "duffle/math.atom.h"
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# include "duffle/gte.atom.h"
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# include "duffle/mips.atom.c"
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# include "duffle/gp.atom.c"
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# include "duffle/psyq.atom.c"
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# include "gen/offsets.h"
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# include "gen/macs.h"
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# include "gen/auto_reg.h"
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# include "hello_camera.h"
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#endif
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ATOM_FILE_DEBUGGER_LINE_MARKER(hello_camera_atom_c);
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#pragma region MACs (Mips Atom components)
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FI_ Slice_MipsCode ac_put_disp_env(AtomBuilder_R ab, U4 reg_transfer, U4 reg_base, U2 port)
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MipsAtomComp_Proc_(ab, {
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// Emits 5 GP0 commands for buffer 0 (display_area = (0,0,320,240)).
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// Sequence per libpsyx PutDispEnv: DrawArea TL → DrawArea BR → Mask → DrawArea TL → DrawArea BR
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mac_gcmd_push(gp0_word_draw_area_top_left_origin, reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_draw_area_bottom_right_320x240, reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_set_mask_bit(), reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_draw_area_top_left_origin, reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_draw_area_bottom_right_320x240, reg_transfer, reg_base, port),
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})
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I_ Slice_MipsCode ac_put_draw_env(AtomBuilder_R ab, U4 reg_transfer, U4 reg_base, U2 port)
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MipsAtomComp_Proc_(ab, {
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/*
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* ORIGIN: each code word corresponds to the EXACT value libpsyx's PutDrawEnv function would compute for the same DrawEnv settings.
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* References:
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* - libpsyx source: `toolchain/psyq-4_7/lib/libgpu.a` (binary, function `PutDrawEnv`)
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* - PSX-SPX doc: https://problemkaputt.de/psx-spx.htm#gputdrawingcommands
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* - PSYQ SDK: `setdrawenv` / `makelongdr_env` source
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* - NOCASH PSX spec: §"GP0(E1h) Draw Mode setting" through §"DR_ENV"
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*
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* The 16-word format is documented in the PSYQ SDK manual and on NOCASH's PSX-spec.txt. The libpsyx reference is at:
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* ./toolchain/psyq-4_7/lib/libgpu.a
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* (binary; the PutDrawEnv implementation builds the 16-word DR_ENV from the user's DRAWENV struct and emits it via GP0 GPU commands.)
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*
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* Word indices (libpsyx PutDrawEnv / SetDrawEnv order):
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* tag = (length << 24) | addr — 16-word packet (1 tag + 15 code)
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* code[0] = DrawMode (dfe=1, dtd=0, tpage=0) — must come first per libpsyx
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* code[1] = TextureWindow (tw=(0,0)) — bare-cmd word; GPU uses current state
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* code[2] = DrawArea top-left (clip.x=0, clip.y=240)
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* code[3] = DrawArea bottom-right (clip.x+w=320, clip.y+h=480)
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* code[4] = DrawOffset (ofs=(0,0)) — bare-cmd word
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* code[5] = Mask (dtd=0, dfe=1, isbg=1) — 0xE6 cmd + isbg bit
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* code[6] = Initial-bg-color (isbg=1, r=7, g=7, b=7)
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* code[7] = DrawMode (isbg=1, tpage=0) — re-asserts DrawMode with isbg
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* code[8..10] = padding (NOP) — 3 words to fill the packet
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* code[11..12] = TextureWindow bottom-right — defaults to (0,0,0,0)
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* code[13..14] = padding (NOP) — completes the 16-word packet
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*/
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mac_gcmd_push(gp0_dr_env_tag, reg_transfer, reg_base, port), /* tag (length=15 << 24, addr=0) — packet header for the DR_ENV sequence. The GPU needs this to recognize the next 15 words as a DR_ENV packet and trigger the isbg auto-clear. */
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mac_gcmd_push(gp0_word_draw_mode_drawing_allowed, reg_transfer, reg_base, port), /* code[0] DrawMode (dfe=1, dtd=0, tpage=0) */
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mac_gcmd_push(gp0_word_set_texture_window(), reg_transfer, reg_base, port), /* code[1] TextureWindow (tw=(0,0)) */
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mac_gcmd_push(enc_gp0_draw_area_tl_word(0, ScreenRes_Y), reg_transfer, reg_base, port), /* code[2] DrawArea top-left (clip.x=0, clip.y=ScreenRes_Y=240) */
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mac_gcmd_push(gp0_word_draw_area_bottom_right_320x240, reg_transfer, reg_base, port), /* code[3] DrawArea bottom-right (clip.x+w=320, clip.y+h=480) */
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mac_gcmd_push(gp0_word_set_draw_offset(), reg_transfer, reg_base, port), /* code[4] DrawOffset (ofs=(0,0)) — bare-cmd word; the GPU uses the current state machine. */
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mac_gcmd_push(gp0_word_dr_env_mask(), reg_transfer, reg_base, port), /* code[5] Mask (dtd=0, dfe=1, isbg=1) — 0xE6 cmd + isbg bit. */
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mac_gcmd_push(gp0_word_dr_env_bg_color_cmd(1, 7, 7, 7), reg_transfer, reg_base, port), /* code[6] Initial-bg-color + auto-clear (isbg=1, r=7, g=7, b=7). */
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mac_gcmd_push(gp0_word_dr_env_draw_mode(1), reg_transfer, reg_base, port), /* code[7] Re-assert DrawMode with isbg=1 (isbg-flag set; the 0xE1 cmd byte plus isbg only). */
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/* code[8..10] Padding (NOP — GPU discards; the DR_ENV requires 16 words total). */
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mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port),
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/* code[11..12] TextureWindow bottom-right (tw.x+tw.w=0, tw.y+tw.h=0) — libpsyx emits twice. */
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mac_gcmd_push(gp0_word_set_texture_window(), reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_set_texture_window(), reg_transfer, reg_base, port),
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/* code[13..14] Padding (NOP) — completes the 16-word packet. */
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mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port),
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mac_gcmd_push(gp0_word_nop(), reg_transfer, reg_base, port),
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})
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#pragma endregion MACs
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#pragma region Atom Procs
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#pragma region resolve_look_at
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/* ─── resolve_look_at bundle chain atoms ──────────────────────────── */
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typedef AtomBundle_(resolve_look_at) { MipsAtom
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*input_and_sub,
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*normalize_fwd_uz,
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*cross_to_right,
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*normalize_right_ux,
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*cross_to_up,
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*normalize_up_uy,
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*populate_mt3s4s2;
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};
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typedef Struct_(ResolveLookAtScratch) {
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V3_S4 fwd;
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V3_S4 uz;
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V3_S4 right;
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V3_S4 ux;
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V3_S4 up;
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V3_S4 uy;
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P3_S4 eye;
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P3_S4 target;
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V3_S4 up_in;
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};
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typedef Struct_(Binds_ResolveLookAtSub) {
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P3_S4* target;
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P3_S4* eye;
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V3_S4* up_in;
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};
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typedef Struct_(RegUse_resolve_look_at_input_and_sub) {
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Reg target_ptr;
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Reg eye_ptr;
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Reg up_in_ptr;
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union { Reg_(V3_S4) r012, up_in, eye; };
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union { Reg_(V3_S4) r345, target, fwd; };
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};
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/* Atom 0 in the bundle: input_and_sub. Stages C-side inputs into the scratchpad and computes fwd = target - eye. */
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internal MipsAtom* AtomBundleEntry_(resolve_look_at,input_and_sub)(AtomArena_R aa, RegUse_resolve_look_at_input_and_sub r)
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atom_info(atom_bind(Binds_ResolveLookAtSub)) MipsAtom_Proc_(aa, {
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load_word(r.target_ptr, R_TapePtr, O_(Binds_ResolveLookAtSub,target)),
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load_word(r.eye_ptr, R_TapePtr, O_(Binds_ResolveLookAtSub,eye)),
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load_word(r.up_in_ptr, R_TapePtr, O_(Binds_ResolveLookAtSub,up_in)),
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LdSlot_ add_ui_self( R_TapePtr, S_(Binds_ResolveLookAtSub)),
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/* Stage up_in.x/y/z into the scratchpad. R_ScratchBase = R_SP = 0x1F800000. */
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mac_load_v3s4( r.up_in, r.up_in_ptr, 0), LdSlot_
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mac_store_v3s4(r.up_in, R_ScratchBase, O_(ResolveLookAtScratch,up_in)),
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// Stage eye.x/y/z into the scratchpad (atom 6 reads these for the translation column).
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mac_load_v3s4( r.eye, r.eye_ptr, 0), LdSlot_
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mac_store_v3s4(r.eye, R_ScratchBase, O_(ResolveLookAtScratch,eye)),
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/* Compute fwd = target - eye. */
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mac_load_v3s4( r.target, r.target_ptr, 0), LdSlot_
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mac_sub_v3s4_self(r.fwd, r.eye),
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mac_store_v3s4( r.fwd, R_ScratchBase, O_(ResolveLookAtScratch,fwd)),
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mac_yield()
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})
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typedef Struct_(Binds_ResolveLookAt_PopulateMT3S4S2) {
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MT3_S2S4* look_at; /* MT3_S2S4* — destination matrix address */
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};
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typedef Struct_(RegUse_resolve_look_at_populate_mt3s4s2) {
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Reg look_at;
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Reg eye; /* matrix_vector phase: load -eye */
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Reg_(V3_S4) row; /* populate phase: load ux/uy/uz */
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union { Reg r0, ux, vx; }; /* populate addr → matrix_vector v_x */
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union { Reg r1, uy, vy; }; /* populate uy → matrix_vector v_y */
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union { Reg r2, uz, vz; }; /* populate uz → matrix_vector v_z */
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};
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/* write look_at->m[][] from ux/uy/uz as packed S2 (populate),
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* ctc2 RT chain into C2[0..4] (matrix_vector), MVMVA RT*(-eye)>>12, store off
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* directly to look_at->t[] (trans_matrix).
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*
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* C11 ApplyMatrixLV semantics (gte.atom.c ac_apply_matrix_lv; libgte reference):
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* 1. ctc2 RT matrix (5 ctc2s to C2[0..4])
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* 2. lw -eye from memory
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* 3. S15 decomposition (eliminated here — the fused body takes the >>12 path
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* directly via mtc2 IR + MVMVA pass2, matching the libgte canonical output)
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* 4. mtc2 to IR1/2/3, nop2, MVMVA pass2 (sf=1, mx=0, v=3, cv=3)
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* 5. mfc2 MACs → off
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* 6. store off to look_at->t[] (skip scratch.eye intermediate)
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*/
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internal MipsAtom* AtomBundleEntry_(resolve_look_at,populate_mt3s4s2)(AtomArena_R aa, RegUse_resolve_look_at_populate_mt3s4s2 r)
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atom_info(atom_bind(Binds_ResolveLookAt_PopulateMT3S4S2)) MipsAtom_Proc_(aa, {
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/* --- Tape pop: look_at pointer --- */
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load_word(r.look_at, R_TapePtr, O_(Binds_ResolveLookAt_PopulateMT3S4S2,look_at)),
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LdSlot_ add_ui_self( R_TapePtr, S_(Binds_ResolveLookAt_PopulateMT3S4S2)),
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add_si(r.ux, R_ScratchBase, O_(ResolveLookAtScratch, ux)), LdSlot_
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add_si(r.uy, R_ScratchBase, O_(ResolveLookAtScratch, uy)),
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add_si(r.uz, R_ScratchBase, O_(ResolveLookAtScratch, uz)),
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add_si(r.eye, R_ScratchBase, O_(ResolveLookAtScratch, eye)),
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/* write look_at->m[][] from ux/uy/uz as packed S2 */
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mac_load_v3s4(r.row, r.ux, 0), LdSlot_ mac_store_v3s2(r.row, r.look_at, O_(MT3_S2S4, m[0])),
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mac_load_v3s4(r.row, r.uy, 0), LdSlot_ mac_store_v3s2(r.row, r.look_at, O_(MT3_S2S4, m[1])),
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mac_load_v3s4(r.row, r.uz, 0), LdSlot_ mac_store_v3s2(r.row, r.look_at, O_(MT3_S2S4, m[2])),
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/* ctc2 RT chain + MVMVA RT * (-eye) >> 12 */
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/* C2[0] = (RT12<<16)|RT11 ← ctc2 RT11 from m[0][0..1]
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* C2[1] = (RT21<<16)|RT13 ← ctc2 RT12 from m[0][2..3]
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* C2[2] = (RT23<<16)|RT22 ← ctc2 RT13 from m[1][1..2]
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* C2[3] = (RT32<<16)|RT31 ← ctc2 RT21 from m[2][0..1]
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* C2[4] = (RT33<<16)|junk ← ctc2 RT22 from m[2][2] (half) */
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load_word( r.vx, r.look_at, O_(MT3_S2S4, m[0][0])), /* RT11|RT12 */ LdSlot_
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load_word( r.vy, r.look_at, O_(MT3_S2S4, m[0][2])), /* RT13|RT21 */ LdSlot_ gte_mv_to_ctrl_r(r.vx, gte_cr_RT11),
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load_word( r.vz, r.look_at, O_(MT3_S2S4, m[1][1])), /* RT22|RT23 */ LdSlot_ gte_mv_to_ctrl_r(r.vy, gte_cr_RT12),
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load_word( r.vx, r.look_at, O_(MT3_S2S4, m[2][0])), /* RT31|RT32 */ LdSlot_ gte_mv_to_ctrl_r(r.vz, gte_cr_RT13),
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load_half_u(r.vy, r.look_at, O_(MT3_S2S4, m[2][2])), /* RT33 */ LdSlot_ gte_mv_to_ctrl_r(r.vx, gte_cr_RT21),
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GteDelay_ mac_load_word_v3(r.vx, r.vy, r.vz, r.eye, 0), LdSlot_
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mac_sub_s_v3(r.vx, r.vy, r.vz, R_0, R_0, R_0, r.vx, r.vy, r.vz),
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gte_mv_to_data_r(r.vx, C2_IR1),
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gte_mv_to_data_r(r.vy, C2_IR2),
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gte_mv_to_data_r(r.vz, C2_IR3),
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GteDelay_ nop2,
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/* MVMVA pass 2 — C11 ApplyMatrixLV command. sf=1, mx=0 (RT), v=3 (IR), cv=3. Reads RT × IR >> 12. */
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gte_cmdw_mvmva_c11_pass2, GteDelay_ load_word(R_AtomJmp, R_TapePtr, 0), // ac_yield: word 1
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mac_gte_mv_from_data_r_mac123(r.vx, r.vy, r.vz), GteDelay_ add_ui_self( R_TapePtr, S_(MipsCode)), // ac_yield: word 2
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/* store off directly to look_at->t[] (skip scratch.eye intermediate) */
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mac_store_word_v3(r.vx, r.vy, r.vz, r.look_at, O_(MT3_S2S4, t)),
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jump_reg(R_AtomJmp), BdSlot_ nop, // ac_yield: word 3-4
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})
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#pragma endregion resolve_look_at
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#pragma endregion Atom Procs
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#pragma region Baked Atoms
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enum {
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R_ScreenX = R_T5 atom_reg atom_type(U2),
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R_ScreenY = R_T6 atom_reg atom_type(U2),
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R_ScreenBuf = R_T7 atom_reg, /* Caller-pinned: & smem.screen_buf */
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#define R_ScreenBuf_Code R_T7_Code
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};
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//screen_env_init. Mirrors the libpsyx's SetDefDispEnv + SetDefDrawEnv + the manual enable_auto_clear / initial_bg_color writes.
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internal MipsAtom_(screen_env_init) atom_info(atom_phase(screen_init)
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, atom_reads(R_T0, R_ScreenX, R_ScreenY, R_ScreenBuf)
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, atom_writes(R_T0, R_ScreenX, R_ScreenY)
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) {
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/* display[0] = (0, 0, 320, 240); rest of struct zeroed. */
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add_ui(R_ScreenX, R_0, ScreenRes_X), add_ui(R_ScreenY, R_0, ScreenRes_Y),
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mac_store_v2s2(R_ScreenX, R_ScreenY, R_ScreenBuf, O_(DisplayEnv,display_area.width) + O_(DoubleBuffer,display[0])),
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store_word(R_0, R_ScreenBuf, O_(DisplayEnv,display_area) + O_(DoubleBuffer,display[0])),
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store_word(R_0, R_ScreenBuf, O_(DisplayEnv,screen) + O_(DoubleBuffer,display[0])),
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store_word(R_0, R_ScreenBuf, O_(DisplayEnv,vinterlace) + O_(DoubleBuffer,display[0])),
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/* display[1] = (0, 240, 320, 240); rest of struct zeroed. */
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mac_store_rects2(R_0, R_ScreenY, R_ScreenX, R_ScreenY, R_ScreenBuf, O_(DisplayEnv,display_area) + O_(DoubleBuffer,display[1])),
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store_word(R_0, R_ScreenBuf, O_(DisplayEnv,screen) + O_(DoubleBuffer,display[1])),
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store_word(R_0, R_ScreenBuf, O_(DisplayEnv,vinterlace) + O_(DoubleBuffer,display[1])),
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mac_store_rects2(R_0, R_ScreenY, R_ScreenX, R_ScreenY, R_ScreenBuf, O_(DrawEnv,clip_area) + O_(DoubleBuffer,draw[0])), /* draw[0].clip_area = (0, 240, 320, 240). C11's SetDefDrawEnv writes clip.y = y_arg. */
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mac_store_v2s2( R_0, R_ScreenY, R_ScreenBuf, O_(DrawEnv,drawing_offset[0]) + O_(DoubleBuffer,draw[0])), /* draw[0].drawing_offset[0] = (0, 240); C11 passes y_arg as ofs. */
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mac_store_v2s2(R_ScreenX, R_ScreenY, R_ScreenBuf, O_(DrawEnv,clip_area.width) + O_(DoubleBuffer,draw[1])),
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/* draw[0].texture_window = (0, 0, 0, 0); two word-zeroes cover the full 8-byte tw field. */
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store_word(R_0, R_ScreenBuf, O_(DrawEnv,texture_window.x) + O_(DoubleBuffer,draw[0])),
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store_word(R_0, R_ScreenBuf, O_(DrawEnv,texture_window.width) + O_(DoubleBuffer,draw[0])),
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store_word(R_0, R_ScreenBuf, O_(DrawEnv,drawing_offset[0].x) + O_(DoubleBuffer,draw[1])),
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store_word(R_0, R_ScreenBuf, O_(DrawEnv,texture_window.x) + O_(DoubleBuffer,draw[1])),
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store_word(R_0, R_ScreenBuf, O_(DrawEnv,texture_window.width) + O_(DoubleBuffer,draw[1])),
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/* draw[0].texture_page = 10 (gp0_tpage_default). C11 SetDefDrawEnv at C11_only.elf:0x8001273C writes the same 0x0A. . */
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add_ui(R_T0, R_0, gp0_tpage_default),
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store_half(R_T0, R_ScreenBuf, O_(DrawEnv,texture_page) + O_(DoubleBuffer,draw[0])),
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store_half(R_T0, R_ScreenBuf, O_(DrawEnv,texture_page) + O_(DoubleBuffer,draw[1])),
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/* draw[0] control bytes: flag_dither=1, flag_draw_on_display=1 (the dfe bit per psx-spx; libpsyx sets it via `SetDefDrawEnv`'s conditional at C11_only.elf:0x80012728), enable_auto_clear=1. Each byte is named;
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* the previous `store_word(R_0, ..., +20)` overwrote all four with zero. */
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add_ui(R_T0, R_0, 1),
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store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,flag_dither) + O_(DoubleBuffer,draw[0])),
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store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,flag_draw_on_display) + O_(DoubleBuffer,draw[0])),
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store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,enable_auto_clear) + O_(DoubleBuffer,draw[0])),
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store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,flag_dither) + O_(DoubleBuffer,draw[1])),
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store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,flag_draw_on_display) + O_(DoubleBuffer,draw[1])),
|
||
store_byte(R_T0, R_ScreenBuf, O_(DrawEnv,enable_auto_clear) + O_(DoubleBuffer,draw[1])),
|
||
|
||
/* draw[0].initial_bg_color = (r=7, g=7, b=7). */
|
||
add_ui(R_T0, R_0, 7),
|
||
mac_store_rgb8(R_T0,R_T0,R_T0, R_ScreenBuf, O_(DrawEnv,initial_bg_color) + O_(DoubleBuffer,draw[0])),
|
||
mac_store_rgb8(R_T0,R_T0,R_T0, R_ScreenBuf, O_(DrawEnv,initial_bg_color) + O_(DoubleBuffer,draw[1])),
|
||
|
||
mac_yield(),
|
||
};
|
||
|
||
enum {
|
||
R_IO_BaseAddr = R_T4 atom_reg, /* Caller-pinned: IO_BASE_ADDR = 0x1F800000 */
|
||
R_GP1_Offset = R_T2 atom_reg, /* Caller-pinned: GPIO_PORT1_OFFSET = 0x10 */
|
||
atom_auto_reg(gp_screen_init, R_GpTmp), /* Auto-allocated scratch; resolved to a free pool GPR by the lua pass. C-preprocessor expands to R_GpTmp = R_GpTmp_Code with an atom_auto_reg trailing comment. */
|
||
#define R_IO_BaseAddr_Code R_T4_Code
|
||
#define R_GP1_Offset_Code R_T2_Code
|
||
};
|
||
internal MipsAtom_(gp_screen_init) atom_info(atom_phase(screen_init), atom_reads(R_IO_BaseAddr)) {
|
||
store_word(R_0, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(00h) Reset */
|
||
mac_gcmd_push(gp1_word_ResetCmdBuffer(), R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(01h) ClearFIFO; uses pinned R_ScreenX as the transfer reg. */
|
||
mac_gcmd_push(gp1_word_AcknowledgeIRQ(), R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(02h) AckIRQ; uses pinned R_ScreenX as the transfer reg. */
|
||
mac_gcmd_push(gp1_word_DisplayOn(), R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(03h) Display ON; uses pinned R_ScreenX as the transfer reg. */
|
||
mac_gcmd_push(gp1_word_dma_to_gpu(), R_GpTmp, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(04h) DMADirection=2 (CPU->GPU). libpsyx's per-frame PutDrawEnv/DrawOTag use DMA2; without this the DMA queue never drains. Uses auto-allocated R_GpTmp. */
|
||
mac_gcmd_push(gp1_word_StartDisplayArea(), R_GpTmp, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* GP1(05h) StartDisplayArea (X=0, Y=0); uses auto-allocated R_GpTmp. */
|
||
|
||
/* GP1: DisplayMode + Display Ranges. */
|
||
mac_gcmd_push(gp1_word_display_mode_320x240_15bit_ntsc, R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET),
|
||
mac_gcmd_push(gp1_word_horizontal_range_ntsc, R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET),
|
||
mac_gcmd_push(gp1_word_vertical_range_ntsc, R_ScreenX, R_IO_BaseAddr, GPIO_PORT1_OFFSET),
|
||
|
||
/* GTE: SetGeomOffset (OFX, OFY) — ScreenRes_CenterX, ScreenRes_CenterY. */
|
||
load_upper_i(R_ScreenX, ScreenRes_CenterX), gte_mv_to_ctrl_r(R_ScreenX, gte_cr_OFX_Code),
|
||
load_upper_i(R_ScreenX, ScreenRes_CenterY), gte_mv_to_ctrl_r(R_ScreenX, gte_cr_OFY_Code),
|
||
|
||
/* GTE: SetGeomScreen (H) — CR26 (per PSX-SPX / libpsyx), value is the raw projection-plane distance, NOT shifted. */
|
||
add_ui(R_ScreenX, R_0, ScreenZ), gte_mv_to_ctrl_r(R_ScreenX, gte_cr_H_Code),
|
||
|
||
/* GP1: DisplayEnable — bit 0 = 0 (Display ON). */
|
||
mac_gcmd_push(gp1_word_DisplayOn(), R_GpTmp, R_IO_BaseAddr, GPIO_PORT1_OFFSET), /* Uses auto-allocated R_GpTmp. */
|
||
mac_yield(),
|
||
};
|
||
|
||
typedef Struct_(Binds_PadApplyInput) {
|
||
PadState* state;
|
||
V3_S2* cube_rot;
|
||
V3_S2* floor_rot;
|
||
};
|
||
enum {
|
||
R_PadStateT5 = R_T5 atom_reg,
|
||
R_CubeRot = R_T1 atom_reg,
|
||
R_FloorRot = R_T2 atom_reg,
|
||
};
|
||
internal MipsAtom_(pad_input_cube_rotation) atom_info(atom_bind(Binds_PadApplyInput)
|
||
, atom_reads(R_T0, R_CubeRot, R_FloorRot, R_T3, R_T4, R_PadStateT5, R_TapePtr)
|
||
, atom_writes( R_CubeRot, R_FloorRot)
|
||
) {
|
||
/* Pop Binds from tape (state, cube_rot, floor_rot) */
|
||
load_word(R_PadStateT5, R_TapePtr, O_(Binds_PadApplyInput,state)),
|
||
load_word(R_CubeRot, R_TapePtr, O_(Binds_PadApplyInput,cube_rot)),
|
||
load_word(R_FloorRot, R_TapePtr, O_(Binds_PadApplyInput,floor_rot)),
|
||
LdSlot_ add_ui_self( R_TapePtr, S_(Binds_PadApplyInput)),
|
||
|
||
/* Load pad[0].buttons into R_T0. */
|
||
load_word(R_T0, R_PadStateT5, O_(PadState,buttons)), LdSlot_ nop,
|
||
// Note(Ed): Potential op with delay slot?
|
||
|
||
/* D-pad Left: cube_rot.y += 30, floor_rot.y += 5. */
|
||
and_i(R_T3, R_T0, Pad_Left), branch_le_zero(R_T3, atom_offset(dpad_left, exit_dpad_left)), BdSlot_
|
||
load_half( R_T4, R_CubeRot, O_(V3_S2,y)), LdSlot_
|
||
load_half( R_T3, R_FloorRot, O_(V3_S2,y)),
|
||
add_si( R_T4, R_T4, 30),
|
||
add_si( R_T3, R_T3, 5),
|
||
store_half(R_T4, R_CubeRot, O_(V3_S2,y)),
|
||
store_half(R_T3, R_FloorRot, O_(V3_S2,y)),
|
||
atom_label(exit_dpad_left)
|
||
|
||
/* D-pad Right: cube_rot.y -= 30, floor_rot.y -= 5. */
|
||
and_i(R_T3, R_T0, Pad_Right), branch_le_zero(R_T3, atom_offset(dpad_right, exit_dpad_right)), BdSlot_
|
||
load_half( R_T4, R_CubeRot, O_(V3_S2,y)), LdSlot_
|
||
load_half( R_T3, R_FloorRot, O_(V3_S2,y)),
|
||
add_si( R_T4, R_T4, -30),
|
||
add_si( R_T3, R_T3, -5),
|
||
store_half(R_T4, R_CubeRot, O_(V3_S2,y)),
|
||
store_half(R_T3, R_FloorRot, O_(V3_S2,y)),
|
||
atom_label(exit_dpad_right)
|
||
|
||
/* Analog left-stick X: dead zone 0x70..0x90.
|
||
* Cube delta = (0x80 - left_x) >> 2; floor delta = (0x80 - left_x) >> 5. */
|
||
load_byte_u(R_T3, R_PadStateT5, O_(PadState,left.x)), LdSlot_ //?
|
||
|
||
/* Dead-zone check: skip analog if left_x in [0x70, 0x90] inclusive. Outside dead zone on LOW side: left_x < 0x70 (strictly).
|
||
* set_lt_u(R_T4, R_T3, R_T4=0x70) → R_T4 = (left_x < 0x70) ? 1 : 0. */
|
||
add_ui(R_T4, R_0, PadDeadZone_HighBound), set_lt_u(R_T4, R_T3, R_T4), branch_ne(R_T4, R_0, atom_offset(dead_zone_low_check, dead_low_active)),
|
||
add_ui(R_T4, R_0, PadDeadZone_Center), /* BD-slot: pre-load 0x80 for dead_low_active */
|
||
|
||
atom_label(dead_check_upper)
|
||
/* left_x >= 0x70 → check upper bound. */
|
||
load_byte_u(R_T3, R_PadStateT5, O_(PadState,left.x)), /* reload */ LdSlot_ //?
|
||
add_ui( R_T4, R_0, PadDeadZone_HighBound),
|
||
|
||
/* R_T4 = (0x90 < left_x) ? 1 : 0 → (left_x > 0x90) ? 1 : 0 */
|
||
set_lt_u(R_T4, R_T4, R_T3), branch_ne(R_T4, R_0, atom_offset(dead_zone_high_check, dead_high_active)), BdSlot_
|
||
add_ui( R_T4, R_0, PadDeadZone_Center), /* BD-slot: pre-load 0x80 for dead_high_active */
|
||
jump_rel(atom_offset(dead_zone_skip, exit_stick)),
|
||
BdSlot_ mac_yield_load(), LdSlot_
|
||
|
||
atom_label(dead_low_active)
|
||
/* R_T3 = left_x (from line 632 lbu; not clobbered between dead_zone_low_check branch + its BD-slot `add_ui R_T4, 0x80`).
|
||
* The earlier `load_byte_u(R_T3, ...)` reload was redundant and introduced a load-use hazard on the next `sub_u`.
|
||
* R_T4 = 0x80 from the BD-slot of `dead_zone_low_check`'s branch_ne. */
|
||
sub_u( R_T3, R_T4, R_T3), /* R_T3 = 0x80 - left_x */
|
||
/* delta = 0x80 - left_x (positive). */
|
||
|
||
/* R_T4 = cube_delta */
|
||
shift_aright(R_T4, R_T3, 2),
|
||
load_half( R_T0, R_CubeRot, O_(V3_S2,y)), LdSlot_ nop,
|
||
add_u( R_T0, R_T0, R_T4),
|
||
store_half( R_T0, R_CubeRot, O_(V3_S2,y)),
|
||
/* R_T4 = floor_delta — moved into the load-delay slot of the floor load below (fills the 1-instruction gap;
|
||
* doesn't read R_T0; R_T4 settles by the subsequent add_u). */
|
||
load_half( R_T0, R_FloorRot, O_(V3_S2,y)), LdSlot_
|
||
shift_aright(R_T4, R_T3, 5),
|
||
add_u( R_T0, R_T0, R_T4),
|
||
store_half( R_T0, R_FloorRot, O_(V3_S2,y)),
|
||
|
||
jump_rel(atom_offset(end_low, exit_stick)),
|
||
BdSlot_ mac_yield_load(), LdSlot_
|
||
|
||
atom_label(dead_high_active)
|
||
/* R_T3 = left_x (from line 641 lbu in dead_check_upper; not clobbered between dead_zone_high_check branch + its BD-slot `add_ui R_T4, 0x80`).
|
||
* The earlier `load_byte_u(R_T3, ...)` reload was redundant and introduced a load-use hazard on the next `sub_u`.
|
||
* R_T4 = 0x80 from the BD-slot of `dead_zone_high_check`'s branch_ne. */
|
||
sub_u( R_T3, R_T4, R_T3),
|
||
/* delta = 0x80 - left_x (signed negative). */
|
||
|
||
shift_aright(R_T4, R_T3, 2), /* R_T4 = cube_delta (signed) */
|
||
load_half( R_T0, R_CubeRot, O_(V3_S2,y)), LdSlot_ nop,
|
||
add_u( R_T0, R_T0, R_T4),
|
||
store_half( R_T0, R_CubeRot, O_(V3_S2,y)),
|
||
|
||
/* R_T4 = floor_delta (signed) — moved into the load-delay slot of the floor load below. */
|
||
load_half( R_T0, R_FloorRot, O_(V3_S2,y)), LdSlot_
|
||
shift_aright(R_T4, R_T3, 5),
|
||
add_u( R_T0, R_T0, R_T4),
|
||
store_half( R_T0, R_FloorRot, O_(V3_S2,y)),
|
||
|
||
atom_label(no_jump_fallthrough)
|
||
mac_yield_load(), LdSlot_
|
||
|
||
atom_label(exit_stick)
|
||
/* NOT mac_yield() — R_AtomJmp was already loaded in the BD-slot of the dead-zone/exit branch. */
|
||
mac_yield_tail(),
|
||
};
|
||
|
||
enum {
|
||
R_Cam = R_T4 atom_reg,
|
||
R_CamPadState = R_T5 atom_reg,
|
||
};
|
||
typedef Struct_(Binds_PadInputCam) {
|
||
PadState* state;
|
||
Camera* cam;
|
||
};
|
||
internal MipsAtom_(pad_input_cam) atom_info(atom_bind(Binds_PadInputCam)
|
||
, atom_reads( R_Cam, R_CamPadState, R_TapePtr)
|
||
, atom_writes(R_Cam)
|
||
) {
|
||
/* Bind pop: state → R_CamPadState (R_T5), cam → R_Cam (R_T4), advance R_TapePtr by 8. */
|
||
load_word(R_CamPadState, R_TapePtr, O_(Binds_PadInputCam,state)),
|
||
load_word(R_Cam, R_TapePtr, O_(Binds_PadInputCam,cam)),
|
||
LdSlot_ add_ui_self( R_TapePtr, S_(Binds_PadInputCam)),
|
||
|
||
/* Load pad[0].buttons into R_T0; nop fills the load-delay slot. */
|
||
load_word(R_T0, R_CamPadState, O_(PadState,buttons)), LdSlot_
|
||
load_word(R_T1, R_Cam, O_(Camera,pos.x)),
|
||
|
||
// D-pad Left → cam.pos.x -= 50. and_i fulfills BD-slot for load on R_Cam.
|
||
LdSlot_ and_i(R_T3, R_T0, Pad_Left), branch_le_zero(R_T3, atom_offset(left_x, exit_left_x)), BdSlot_ nop,
|
||
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.x)),
|
||
atom_label(exit_left_x)
|
||
|
||
/* D-pad Right → cam.pos.x += 50. Reuses R_T1 from Left. */
|
||
and_i(R_T3, R_T0, Pad_Right), branch_le_zero(R_T3, atom_offset(right_x, exit_right_x)), BdSlot_ nop,
|
||
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.x)),
|
||
atom_label(exit_right_x)
|
||
|
||
/* D-pad Up → cam.pos.y -= 50. Load pos.y BEFORE the andi. */
|
||
load_word(R_T1, R_Cam, O_(Camera,pos.y)), LdSlot_
|
||
and_i(R_T3, R_T0, Pad_Up), branch_le_zero(R_T3, atom_offset(up_y, exit_up_y)), BdSlot_ nop,
|
||
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.y)),
|
||
atom_label(exit_up_y)
|
||
|
||
/* D-pad Down → cam.pos.y += 50. Reuses R_T1 from Up. */
|
||
and_i(R_T3, R_T0, Pad_Down), branch_le_zero(R_T3, atom_offset(down_y, exit_down_y)), BdSlot_ nop,
|
||
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.y)),
|
||
atom_label(exit_down_y)
|
||
|
||
/* D-pad Cross → cam.pos.z -= 50. Load pos.z BEFORE the andi. */
|
||
load_word(R_T1, R_Cam, O_(Camera,pos.z)), LdSlot_
|
||
and_i(R_T3, R_T0, Pad_Cross), branch_le_zero(R_T3, atom_offset(cross_z, exit_cross_z)), BdSlot_ load_word(R_AtomJmp, R_TapePtr, 0), LdSlot_ // ac_yield: word 1
|
||
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.z)),
|
||
atom_label(exit_cross_z)
|
||
|
||
/* D-pad Circle → cam.pos.z += 50. Reuses R_T1 from Cross. */
|
||
and_i(R_T3, R_T0, Pad_Circle), branch_le_zero(R_T3, atom_offset(circle_z, exit_circle_z)), BdSlot_ add_ui_self(R_TapePtr, S_(MipsCode)), // ac_yield: word 2
|
||
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.z)),
|
||
atom_label(exit_circle_z)
|
||
|
||
jump_reg(R_AtomJmp), BdSlot_ nop // ac_yield: word 3-4
|
||
};
|
||
|
||
enum {
|
||
R_PrimCursor = R_T7 atom_reg atom_type(U4*), /* Output cursor (primitive buffer) */
|
||
R_FaceCursor = R_T4 atom_reg atom_type(V4_S2*), /* Cube face-index cursor (V4_S2*); floor context switches to V3_S2* via atom_phase */
|
||
R_VertBase = R_T5 atom_reg atom_type(V3_S2*), /* Base address of the vertex array */
|
||
R_OtBase = R_T6 atom_reg atom_type(U4*), /* Base address of the Ordering Table */
|
||
#define R_PrimCursor_Code R_T7_Code
|
||
#define R_FaceCursor_Code R_T4_Code
|
||
#define R_VertBase_Code R_T5_Code
|
||
#define R_OtBase_Code R_T6_Code
|
||
};
|
||
typedef Struct_(Binds_CubeTri) {
|
||
U4 PrimCursor;
|
||
V4_S2* FaceCursor;
|
||
V3_S2* VertBase;
|
||
U4* OtBase;
|
||
};
|
||
internal MipsAtom_(rbind_cube_g4_face) atom_info(atom_bind(Binds_CubeTri), atom_phase(cube_g4)
|
||
, atom_reads(R_TapePtr)
|
||
, atom_writes(R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase, R_TapePtr)
|
||
){
|
||
/* Pop 4 arguments from the tape directly into the workspace registers */
|
||
load_word(R_PrimCursor, R_TapePtr, O_(Binds_CubeTri,PrimCursor)),
|
||
load_word(R_FaceCursor, R_TapePtr, O_(Binds_CubeTri,FaceCursor)),
|
||
load_word(R_VertBase, R_TapePtr, O_(Binds_CubeTri,VertBase)),
|
||
load_word(R_OtBase, R_TapePtr, O_(Binds_CubeTri,OtBase)),
|
||
LdSlot_ add_ui_self( R_TapePtr, S_(Binds_CubeTri)),
|
||
mac_yield()
|
||
};
|
||
|
||
// cube_g4_face — Draw one cube face (Gouraud-shaded quad) via the GTE tape pipeline
|
||
internal
|
||
MipsAtom_(cube_g4_face) atom_info(atom_phase(cube_g4),
|
||
atom_reads( R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase),
|
||
atom_writes(R_PrimCursor, R_FaceCursor)
|
||
){
|
||
load_half_u(R_T0, R_FaceCursor, 0 * S_(S2)),
|
||
load_half_u(R_T1, R_FaceCursor, 1 * S_(S2)),
|
||
load_half_u(R_T2, R_FaceCursor, 2 * S_(S2)),
|
||
// load_half_u(R_T3, R_FaceCursor, 3 * S_(S2)),
|
||
|
||
LdSlot_ mac_gte_load_tri_verts(R_VertBase, R_T0, R_T1, R_T2),
|
||
GteDelay_ load_half_u(R_T3, R_FaceCursor, 3 * S_(S2)), LdSlot_
|
||
GteDelay_ load_word(R_AtomJmp, R_TapePtr, 0), LdSlot_ //ac_yield: word 2,
|
||
gte_cmdw_rotate_translate_perspective_triple,
|
||
gte_cmdw_nclip,
|
||
|
||
gte_mv_from_data_r(R_T0, C2_MAC0), GteDelay_ add_ui_self(R_TapePtr, S_(MipsCode)), // ac_yield: word 1
|
||
branch_le_zero(R_T0, atom_offset(cull, cube_g4_face_exit)),
|
||
/* BD-slot: Write the prim tag (R_0=0; overwrites the legacy tag word in the prim_buffer).
|
||
* If branch IS taken (face culled), the body is skipped and this 0-tag is stranded —
|
||
* harmless because the OT entry that points to this prim is created later. */
|
||
BdSlot_ store_word(R_0, R_PrimCursor, O_(Poly_G4, tag)),
|
||
shift_lleft(R_AT, R_T3, v3s2_byteoff), add_u(R_AT, R_AT, R_VertBase),
|
||
load_word(R_V0, R_AT, O_(V3_S2, x)), load_word(R_V1, R_AT, O_(V3_S2, z)), LdSlot_
|
||
gte_mv_to_data_r(R_V0, C2_VXY0), gte_mv_to_data_r(R_V1, C2_VZ0),
|
||
|
||
mac_gte_store_g4_p012(R_PrimCursor),
|
||
gte_cmdw_rotate_translate_perspective_single,
|
||
mac_gte_store_g4_p3(R_PrimCursor),
|
||
|
||
gte_cmdw_avg_sort_z4,
|
||
gte_mv_from_data_r(R_T1, C2_OTZ),
|
||
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, cube_g4_face_exit)), BdSlot_ nop,
|
||
mac_insert_ot_tag(R_OtBase, R_PrimCursor, S_(Poly_G4)),
|
||
mac_format_g4_color(R_PrimCursor,
|
||
/* c0 magenta */ 0xFF, 0x00, 0xFF,
|
||
/* c1 yellow */ 0xFF, 0xFF, 0x00,
|
||
/* c2 cyan */ 0x00, 0xFF, 0xFF,
|
||
/* c3 green */ 0x00, 0xFF, 0x00),
|
||
// end: branch(bounds_chk)
|
||
// end: branch(cull)
|
||
|
||
atom_label(cube_g4_face_exit)
|
||
add_ui_self(R_PrimCursor, S_(Poly_G4)), /* 9 words = Poly_G4 */
|
||
add_ui_self(R_FaceCursor, S_(S2) * 4), /* 4 × S2 = 8 bytes */
|
||
jump_reg(R_AtomJmp), BdSlot_ nop // ac_yield: word 3-4
|
||
};
|
||
|
||
typedef Struct_(Binds_FloorTri) {
|
||
U4 PrimCursor;
|
||
V3_S2* FaceCursor;
|
||
V3_S2* VertBase;
|
||
U4* OtBase;
|
||
};
|
||
internal
|
||
MipsAtom_(rbind_floor_f3_face) atom_info(atom_bind(Binds_FloorTri), atom_phase(floor_f3)
|
||
, atom_reads(R_TapePtr)
|
||
, atom_writes(R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase, R_TapePtr)
|
||
){
|
||
/* Pop 4 arguments from the tape directly into the workspace registers */
|
||
load_word(R_PrimCursor, R_TapePtr, O_(Binds_FloorTri,PrimCursor)),
|
||
load_word(R_FaceCursor, R_TapePtr, O_(Binds_FloorTri,FaceCursor)),
|
||
load_word(R_VertBase, R_TapePtr, O_(Binds_FloorTri,VertBase)),
|
||
load_word(R_OtBase, R_TapePtr, O_(Binds_FloorTri,OtBase)),
|
||
LdSlot_ add_ui_self( R_TapePtr, S_(Binds_FloorTri)),
|
||
mac_yield()
|
||
};
|
||
|
||
// atom_dbg_skip
|
||
internal
|
||
MipsAtom_(floor_f3_face) atom_info(atom_phase(floor_f3)
|
||
, atom_reads( R_PrimCursor, R_FaceCursor, R_VertBase, R_OtBase)
|
||
, atom_writes(R_PrimCursor, R_FaceCursor)
|
||
) {
|
||
mac_load_tri_indices(R_FaceCursor, R_T0, R_T1, R_T2),
|
||
mac_gte_load_tri_verts(R_VertBase, R_T0, R_T1, R_T2), GteDelay_ nop2,
|
||
gte_cmdw_rotate_translate_perspective_triple, // 2 nops retire the final cpu -> gte writes before RTPT
|
||
gte_cmdw_nclip,
|
||
|
||
/* Culling (Branch forward if Backface) */
|
||
gte_mv_from_data_r(R_T0, C2_MAC0), GteDelay_ load_word(R_AtomJmp, R_TapePtr, 0), // ac_yield: word 1
|
||
branch_le_zero(R_T0, atom_offset(culling, floor_f3_face_exit)), BdSlot_ add_ui_self(R_TapePtr, S_(MipsCode)), // ac_yield: word 2
|
||
/* Format Primitive */
|
||
mac_gte_store_f3(R_PrimCursor),
|
||
|
||
/* Calculate Depth */
|
||
gte_avg_sort_z3,
|
||
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_f3_face_exit)), BdSlot_ nop,
|
||
mac_format_f3_color(R_PrimCursor, 0xFF, 0xFF, 0xFF), // RGB-form (R=FF, G=FF, B=FF = white)
|
||
mac_insert_ot_tag(R_OtBase, R_PrimCursor, S_(Poly_F3)), /* Insert into Ordering Table Linked List */
|
||
add_ui_self(R_PrimCursor, S_(Poly_F3)), /* Advance Prim Cursor (5 words) */
|
||
// Note(Ed): No bounds checking, should be checked before atom runs.
|
||
// end: branch(bounds_chk)
|
||
// end: branch(culling)
|
||
|
||
/* Advance Input Cursor & Yield (Both branch targets land here) */
|
||
atom_label(floor_f3_face_exit)
|
||
add_ui_self(R_FaceCursor, S_(S2) * 4), /* Advance Face Cursor (4 * S2 = 8 bytes) */
|
||
jump_reg(R_AtomJmp), BdSlot_ nop // ac_yield: word 3-4
|
||
};
|
||
|
||
typedef Struct_(Binds_SyncPrimitiveArena) { U4 used; U4 cursor; };
|
||
internal MipsAtom_(sync_primitive_arena) atom_info(atom_bind(Binds_SyncPrimitiveArena)
|
||
, atom_reads( R_TapePtr, R_PrimCursor)
|
||
, atom_writes(R_TapePtr)
|
||
){
|
||
load_word(R_AT, R_TapePtr, O_(Binds_SyncPrimitiveArena,used)),
|
||
load_word(R_T0, R_TapePtr, O_(Binds_SyncPrimitiveArena,cursor)), LdSlot_
|
||
add_ui_self( R_TapePtr, S_(Binds_SyncPrimitiveArena)),
|
||
/* Calculate byte offset and store directly back to RAM */
|
||
sub_u( R_T0, R_PrimCursor, R_T0), // R_T0 = R_PrimCursor - binds.cursor
|
||
store_word(R_T0, R_AT, 0), // R_AT[0] = R_T0
|
||
mac_yield()
|
||
};
|
||
|
||
#pragma endregion Baked Atoms
|