mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
2ba74f3b4b
The G1.2/G1.3 mechanism: per-word RAM/scratchpad + per-GPR + per-GTE-reg shadows carrying sub-pixel projections BY PROVENANCE, validated against the actual guest word on every read (never guessed from rounded position - the measured 93.1%-ambiguous G1.4 dead end). Clean-room from psx-spx + public design docs; vendored duckstation (CC BY-NC-ND) and beetle-psx (GPL) trees remain black-box oracles only - no code ported. - runtime/src/pgxp.cpp + pgxp.h: engine, per-vertex GetPreciseVertex (dataflow -> ambiguity-gated position cache -> native) with truncation agreement + tolerance safeguards; stats; test accessors. - pgxp_hooks.h: 5-entry hook funnel; PGXP_*() macros no-op unless -DPSX_PGXP=1 (codegen-time gate over ONE generated tree); appended PGXPHooks* table member in OverlayCallbacks (ABI bump ships with the Phase-2 emitter change). - Both interpreters wired: loads/stores/COP2 + precision-carrying arithmetic (moves, add/sub, or-merge, 16-bit shifts, LUI, HI/LO). - gte.cpp: RTPS feeds the GTE reg shadows; retired s_precise_sxy FIFO, hashed s_precision_store, and plain-store invalidation (redundant under validate-on-read; store hot path gets 3 calls back). - gpu.c: prepare_precise_triangle rewritten per-vertex; perspective UVs share the same provenance and compose per triangle. - [video] pgxp_cpu_mode / pgxp_tolerance keys; TCP pgxp verb live- toggles geometry/texture/cpu_mode/tolerance; geom_correction census grew the pgxp dataflow counters (G1.9 gate metric). - tests: new pgxp_test (registered); gte_register_access_test updated to precise invalidation contract. 33/33 enabled tests green. Also fixed while landing (both broke a fresh master tree): - runtime.cmake: once-only psx_game_version.txt stamp (multi-target file(GENERATE) collision broke every fresh single-config configure). - test_overlay_capture_retry: SDL3 rot (SDL_SetMainReady gone, inverted SDL_Init check) -> psx_sdl_init. Tracked as beads-eio.3.48; postmortem + this landing: ENHANCEMENTS.md G1-G1.10. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
94 lines
4.6 KiB
C
94 lines
4.6 KiB
C
#ifndef PGXP_HOOKS_H
|
|
#define PGXP_HOOKS_H
|
|
|
|
/* PGXP dataflow-shadowing hook surface (ENHANCEMENTS.md G1.2/G1.3).
|
|
*
|
|
* The runtime keeps a host-only "shadow" of sub-pixel GTE projection results
|
|
* and follows them BY PROVENANCE as the game moves them through registers and
|
|
* RAM into a GP0 packet (pgxp.cpp). Generated code participates by calling
|
|
* these hooks after the guest operation completes.
|
|
*
|
|
* Gating model (the G1.3 decision): the emitter writes PGXP_*() macro
|
|
* invocations unconditionally; this header expands them to real calls only
|
|
* when the translation unit is compiled with -DPSX_PGXP=1 (the pgxp build
|
|
* variant). In the base variant the macros expand to ((void)0), so base
|
|
* objects compile to exactly the pre-feature code — the feature costs nothing
|
|
* unless a title links the pgxp target.
|
|
*
|
|
* RULES for emit sites:
|
|
* - Macro arguments MUST be side-effect free (they vanish in base builds).
|
|
* - Hooks run AFTER the guest architectural effect (value = what actually
|
|
* loaded/stored/resulted), so the shadow can validate against reality.
|
|
* - `cpu` must be in scope at every emit site (it always is in generated C).
|
|
*
|
|
* The interpreters (dirty_ram_interp.c, psx_interpreter.c) call the
|
|
* psx_pgxp_* functions directly — they are runtime code compiled once, and
|
|
* every hook early-outs on a single global when the feature is off.
|
|
*
|
|
* Overlay DLLs cannot link runtime symbols directly; they forward through the
|
|
* PGXPHooks table below (OverlayCallbacks.pgxp, overlay_api.h). A NULL table
|
|
* no-ops every hook — precision shadowing is a visual enhancement, never
|
|
* load-bearing.
|
|
*
|
|
* LICENSING: this is a clean-room implementation of the publicly documented
|
|
* PGXP technique (psx-spx, public design write-ups). Do NOT port code from
|
|
* the vendored duckstation/ (CC BY-NC-ND) or beetle-psx/ (GPL) trees; they
|
|
* are black-box behavioral oracles only. See ENHANCEMENTS.md G1.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct CPUState;
|
|
|
|
/* Funnel entry points (implemented in runtime/src/pgxp.cpp). The raw
|
|
* instruction word carries the op/rs/rt/rd/imm decode so the emitted call is
|
|
* uniform per class; `value` is the architectural result of the operation.
|
|
*
|
|
* load: rt <- [addr]; value = loaded word/half/byte (post-extension)
|
|
* store: [addr] <- rt; value = the stored word/half/byte
|
|
* alu: rd/rt <- op(s1, s2); result = the written value (also LUI, HILO
|
|
* moves and MOVE idioms — the body decodes the class from instr)
|
|
* muldiv: HI/LO <- op(s1, s2)
|
|
* cop2: MFC2/CFC2/MTC2/CTC2 (addr = 0) and LWC2/SWC2 (addr = guest addr);
|
|
* value = the transferred word
|
|
*/
|
|
void psx_pgxp_load (struct CPUState *cpu, uint32_t instr, uint32_t addr, uint32_t value);
|
|
void psx_pgxp_store (struct CPUState *cpu, uint32_t instr, uint32_t addr, uint32_t value);
|
|
void psx_pgxp_alu (struct CPUState *cpu, uint32_t instr, uint32_t result, uint32_t s1, uint32_t s2);
|
|
void psx_pgxp_muldiv(struct CPUState *cpu, uint32_t instr, uint32_t hi, uint32_t lo, uint32_t s1, uint32_t s2);
|
|
void psx_pgxp_cop2 (struct CPUState *cpu, uint32_t instr, uint32_t value, uint32_t addr);
|
|
|
|
/* Forwarder table for overlay DLLs (OverlayCallbacks.pgxp). Appended-last
|
|
* member semantics apply: a NULL pointer (older host) means "no shadowing". */
|
|
typedef struct PGXPHooks {
|
|
void (*load) (struct CPUState *cpu, uint32_t instr, uint32_t addr, uint32_t value);
|
|
void (*store) (struct CPUState *cpu, uint32_t instr, uint32_t addr, uint32_t value);
|
|
void (*alu) (struct CPUState *cpu, uint32_t instr, uint32_t result, uint32_t s1, uint32_t s2);
|
|
void (*muldiv)(struct CPUState *cpu, uint32_t instr, uint32_t hi, uint32_t lo, uint32_t s1, uint32_t s2);
|
|
void (*cop2) (struct CPUState *cpu, uint32_t instr, uint32_t value, uint32_t addr);
|
|
} PGXPHooks;
|
|
|
|
#if defined(PSX_PGXP) && PSX_PGXP
|
|
#define PGXP_LOAD(instr, addr, val) psx_pgxp_load(cpu, (instr), (addr), (val))
|
|
#define PGXP_STORE(instr, addr, val) psx_pgxp_store(cpu, (instr), (addr), (val))
|
|
#define PGXP_ALU(instr, res, s1, s2) psx_pgxp_alu(cpu, (instr), (res), (s1), (s2))
|
|
#define PGXP_MULDIV(instr, hi, lo, s1, s2) psx_pgxp_muldiv(cpu, (instr), (hi), (lo), (s1), (s2))
|
|
#define PGXP_COP2(instr, val, addr) psx_pgxp_cop2(cpu, (instr), (val), (addr))
|
|
#else
|
|
#define PGXP_LOAD(instr, addr, val) ((void)0)
|
|
#define PGXP_STORE(instr, addr, val) ((void)0)
|
|
#define PGXP_ALU(instr, res, s1, s2) ((void)0)
|
|
#define PGXP_MULDIV(instr, hi, lo, s1, s2) ((void)0)
|
|
#define PGXP_COP2(instr, val, addr) ((void)0)
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* PGXP_HOOKS_H */
|