xenia-rs

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MechaCat02 4194ed77a3 [iterate-4C] JIT Phase 4a: native FP + 64-bit loads/stores

Native lfs/lfsx/lfd/lfdx/stfs/stfsx/stfd/stfdx and ld/ldx. FP goes through
dedicated helpers (jit_read_f32_as_f64/read_f64/store_f32/store_f64) that
call the EXACT interpreter mem methods + as-casts, so the f32<->f64
conversion is bit-identical by construction (no hand-written cvtss2sd /
NaN-payload risk); FP stores replicate the reservation-invalidation.
emit_ea_x (indexed EA), emit_fp_load/store, emit_int_load64 helpers; fpr
offset added. Differential test fp_loadstore_matches (2000 seeds, FPR
edge patterns 0/-0/inf/NaN/denormal/rounding, asserts fpr-by-bits + mem).
Golden n200m BYTE-IDENTICAL with XENIA_JIT (14 tests green).

Measured (XENIA_JIT_STATS): total fallback execs 29.7M->13.5M (-55%);
throughput ratio vs interp 1.16->1.10. Remaining fallback now FP-arith-
dominated: fmadds 20% + fmuls 16% + fadds 8% (~44%).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-04 20:20:55 +02:00

xenia-analysis

[iterate-4A] Milestone-2: XMA audio decoder + RE tooling (dispatch recorder, analyzer vtable-fix, non-perturbing probes)

2026-06-21 21:38:19 +02:00

xenia-app

[iterate-4C] JIT: gated fallback-opcode histogram (XENIA_JIT_STATS)

2026-07-04 20:14:46 +02:00

xenia-apu

[iterate-4A] Milestone-2: XMA audio decoder + RE tooling (dispatch recorder, analyzer vtable-fix, non-perturbing probes)

2026-06-21 21:38:19 +02:00

xenia-cpu

[iterate-4C] JIT Phase 0: dynasm skeleton (all-fallback, golden byte-identical)