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GPU: give Metal a column in the tuning parameter table #15886

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GPU: give Metal a column in the tuning parameter table #15886

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GPU: refuse deterministic mode on Metal
ktf Oct 1, 2026
10b5bd3
GPU: give Metal a column in the tuning parameter table
ktf Oct 1, 2026
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8 changes: 8 additions & 0 deletions GPU/Common/GPUCommonDef.h
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,14 @@
#define GPUCA_RTC_CONSTEXPR
#endif

#if defined(GPUCA_DETERMINISTIC_MODE) && defined(__METAL__)
// The deterministic paths compute the transcendentals in double (see
// GPUCommonMath::SinCos). The emulated double is bit-exact for + - * / but
// its sin and cos are within 2 ulp of libm, not identical to it, so the
// results could not match the other backends.
#error "GPUCA_DETERMINISTIC_MODE is not supported on Metal"
#endif

#ifndef GPUCA_DETERMINISTIC_CODE
#ifdef GPUCA_DETERMINISTIC_MODE
#define GPUCA_DETERMINISTIC_CODE(det, indet) det // In deterministic mode, take deterministic code path
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