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Add comment above AppleClang workaround in FloatVectorOperations::setFpStatusRegister()

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ed 2021-10-07 12:32:54 +01:00
parent 051e0ed6d6
commit ca16bf44b8
1 changed files with 2 additions and 0 deletions
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modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
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@ -1051,6 +1051,8 @@ intptr_t JUCE_CALLTYPE FloatVectorOperations::getFpStatusRegister() noexcept
void JUCE_CALLTYPE FloatVectorOperations::setFpStatusRegister (intptr_t fpsr) noexcept
{
#if JUCE_INTEL && JUCE_USE_SSE_INTRINSICS
// the volatile keyword here is needed to workaround a bug in AppleClang 13.0
// which aggressively optimises away the variable otherwise
volatile auto fpsr_w = static_cast<uint32_t> (fpsr);
_mm_setcsr (fpsr_w);
#elif defined (__arm64__) || defined (__aarch64__) || JUCE_USE_ARM_NEON