diff options
| author | TellowKrinkle <tellowkrinkle@gmail.com> | 2022-11-13 23:26:09 -0600 |
|---|---|---|
| committer | TellowKrinkle <tellowkrinkle@gmail.com> | 2023-01-25 02:21:56 -0600 |
| commit | a0e6d7c173f79b553c21d87abcccf40549113600 (patch) | |
| tree | f39ecf67f45b5f41f3c659e7a96cc2b3de895c3b /Source/Core/VideoCommon/CPUCull.cpp | |
| parent | 1be0149146b23d65a52b5d74c4c073c016878bc9 (diff) | |
VideoCommon: Explicitly disable fp_contract for CPUCull
Diffstat (limited to 'Source/Core/VideoCommon/CPUCull.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/CPUCull.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Source/Core/VideoCommon/CPUCull.cpp b/Source/Core/VideoCommon/CPUCull.cpp index bb68376b09..92fdc81cc8 100644 --- a/Source/Core/VideoCommon/CPUCull.cpp +++ b/Source/Core/VideoCommon/CPUCull.cpp @@ -15,6 +15,20 @@ #include "VideoCommon/VideoConfig.h" #include "VideoCommon/XFMemory.h" +// We really want things like c.w * a.x - a.w * c.x to stay symmetric, so they cancel to zero on +// degenerate triangles. Make sure the compiler doesn't optimize in fmas where not requested. +#ifdef _MSC_VER +#pragma fp_contract(off) +#else +// GCC doesn't support any in-file way to turn off fp contract yet +// Not ideal, but worst case scenario its cpu cull is worse at detecting degenerate triangles +// (Most likely to happen on arm, as we don't compile the cull code for x86 fma) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wunknown-pragmas" +#pragma STDC FP_CONTRACT OFF +#pragma GCC diagnostic pop +#endif + #if defined(_M_X86) || defined(_M_X86_64) #define USE_SSE #elif defined(_M_ARM_64) |