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libretroadmin
fb5bc4f338
Two dlsym'd test entry points (ps2_audit_vu_prep / ps2_audit_vu_exec) that run an arbitrary micro program through the actual recompiler or the actual ps2float interpreter and expose the full architectural state -- the foundation for the per-op correctness audit of the VU recompilers. Never a mirror of either engine: prep resets the chosen provider and loads the program; exec sets VF/VI/ACC/Q/P, runs from PC 0 to the E-bit end, and reads everything back. Program loads are separated from data runs so operand grids execute without paying a recompiler reset per case. Three run-semantics details the direct entry has to own, each found by the rig's own integrity checks: VPU_STAT lives in VU0's VI for both units (setting it on VU1's own VI gates both engines into running nothing -- the outputs-equal-inputs failure mode that a files-identical check catches); the dispatcher's FPCR-update elision assumes EE-side context, so the export forces the unit's MXCSR around recompiled runs and restores the host's (without it, FMAX plus FMAX produced a raw infinity under the host's round-nearest); and the interpreter computes in ps2float integer code, indifferent to MXCSR. An env-gated trace (PS2_AUDIT_TRACE) prints provider identity and before/after state for rig debugging. First results, VADD register form, VU1, 4768 cases in two batteries (operand-class grid; exponent-distance sweep with sign combinations): default recompiler diverges from the interpreter oracle on 18.1% and 28.4% of lanes respectively -- the expected mask-class, chop-of-sum vs discard-then-add, classic borrow-driven one-ulp examples -- and with accurate add/sub enabled the divergence is 0 of 19072 lanes: the masked composite emission is bit-exact against the true oracle through the actual JIT, the first validation of that path that does not go through a C mirror. Flag-column comparison is recorded but not yet conclusive pending the recompiler's lazy status-flag sync discipline in this entry path. Emitter gate: 35 TUs, 0 failing.
8 lines
143 B
Perl
8 lines
143 B
Perl
{
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global: retro_*;
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ps2_audit_*;
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pcsx2_jithash_dump; /* JIT emission oracle; see pcsx2/x86/JitHash.cpp */
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local: *;
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};
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