Matthew Stanley
2b5ad88dc6
feat(timing): ruler #2 foundation — cycle micro-benchmark test ROM + universal block observe
...
Ruler #2 (the in-tree cycle-model integration-test ecosystem):
- tools/cycle_testrom/gen_testrom.py: hand-encoded MIPS PS-X EXE of cycle-
isolation loops (baseline/alu/load/load2/div/div_spaced/mult). Each loop top is
a block leader, so a cyc_watch single-anchor Δ = one iteration; baseline
subtraction isolates each component (overhead + fetch cancel). Encoding
validated by a clean recompile (divu -> gpr[10]/gpr[11], etc.).
- game.toml/seeds.txt/README.md; .gitignore for the regenerable EXE/json/generated.
Universal per-block-leader observe:
- Added debug_server_cyc_observe at every block leader in the GAME emitter
(code_generator.cpp) to match the BIOS emitter, so ANY recompiled code (game,
BIOS, overlay) is anchorable on both backends — not just function entries.
#ifndef PSX_NO_DEBUG_TOOLS so prod = zero overhead.
Regression-checked: regen Tomba 2 + rebuild, FMV still streams (i_stat 0x8D), no
visual regression. Builds clean.
Remaining for ruler #2 : native test-runtime delivery (boot->entry handoff) +
Beetle .exe sideload + the per-component compare harness (see README TODO).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com >
2026-06-26 22:30:14 -07:00
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