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[idd] wcwrite: gate SIMD stores on SSE2

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This commit is contained in:
Geoffrey McRae
2026-08-17 02:08:29 +10:00
parent 26cafbe3df
commit c0de47b1e1
1 changed files with 3 additions and 3 deletions
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6
idd/LGCommon/WCWrite.cpp
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@@ -44,7 +44,7 @@ namespace WCWrite
} }
#if defined(_M_IX86) || defined(_M_X64) #if defined(_M_IX86) || defined(_M_X64)
__declspec(noinline) void CopySSE41( __declspec(noinline) void CopySSE2(
void * destination, const void * source, size_t size) void * destination, const void * source, size_t size)
{ {
uint8_t * dst = static_cast<uint8_t *>(destination); uint8_t * dst = static_cast<uint8_t *>(destination);
@@ -104,7 +104,7 @@ namespace WCWrite
return &CopyFallback; return &CopyFallback;
__cpuidex(registers, 1, 0); __cpuidex(registers, 1, 0);
const bool sse41 = (registers[2] & (1 << 19)) != 0; const bool sse2 = (registers[3] & (1 << 26)) != 0;
const bool avx = (registers[2] & (1 << 28)) != 0; const bool avx = (registers[2] & (1 << 28)) != 0;
const bool osxsave = (registers[2] & (1 << 27)) != 0; const bool osxsave = (registers[2] & (1 << 27)) != 0;
@@ -116,7 +116,7 @@ namespace WCWrite
return &Detail::CopyAVX2; return &Detail::CopyAVX2;
} }
return sse41 ? &CopySSE41 : &CopyFallback; return sse2 ? &CopySSE2 : &CopyFallback;
} }
#else #else
CopyFn SelectCopy() CopyFn SelectCopy()