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>