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Fixed an issue where ScopedNoDenormals would do nothing on all platforms and added arm implementation

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This commit is contained in:
hogliux 2017-10-02 18:23:51 +01:00
parent 777f498c56
commit 3cbf0791cc
5 changed files with 119 additions and 45 deletions
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84
modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
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@ -1028,20 +1028,98 @@ double JUCE_CALLTYPE FloatVectorOperations::findMaximum (const double* src, int
#endif
}
intptr_t JUCE_CALLTYPE FloatVectorOperations::getFpStatusRegister() noexcept
{
intptr_t fpsr = 0;
#if JUCE_INTEL && JUCE_USE_SSE_INTRINSICS
fpsr = static_cast<intptr_t> (_mm_getcsr());
#elif defined (__arm64__) || defined (__aarch64__) || JUCE_USE_ARM_NEON
#if defined (__arm64__) || defined (__aarch64__)
asm volatile("mrs %0, fpcr" : "=r" (fpsr));
#elif JUCE_USE_ARM_NEON
asm volatile("vmrs %0, fpscr" : "=r" (fpsr));
#endif
#else
#if ! (defined (JUCE_INTEL) || defined (JUCE_ARM))
jassertfalse; // No support for getting the floating point status register for your platform
#endif
#endif
return fpsr;
}
void JUCE_CALLTYPE FloatVectorOperations::setFpStatusRegister (intptr_t fpsr) noexcept
{
#if JUCE_INTEL && JUCE_USE_SSE_INTRINSICS
auto fpsr_w = static_cast<uint32_t> (fpsr);
_mm_setcsr (fpsr_w);
#elif defined (__arm64__) || defined (__aarch64__) || JUCE_USE_ARM_NEON
#if defined (__arm64__) || defined (__aarch64__)
asm volatile("msr fpcr, %0" : : "ri" (fpsr));
#elif JUCE_USE_ARM_NEON
asm volatile("vmsr fpscr, %0" : : "ri" (fpsr));
#endif
#else
#if ! (defined (JUCE_INTEL) || defined (JUCE_ARM))
jassertfalse; // No support for getting the floating point status register for your platform
#endif
ignoreUnused (fpsr);
#endif
}
void JUCE_CALLTYPE FloatVectorOperations::enableFlushToZeroMode (bool shouldEnable) noexcept
{
#if JUCE_USE_SSE_INTRINSICS || (JUCE_USE_ARM_NEON || defined (__arm64__) || defined (__aarch64__))
#if JUCE_USE_SSE_INTRINSICS
_MM_SET_FLUSH_ZERO_MODE (shouldEnable ? _MM_FLUSH_ZERO_ON : _MM_FLUSH_ZERO_OFF);
intptr_t mask = _MM_FLUSH_ZERO_MASK;
#else /*JUCE_USE_ARM_NEON*/
intptr_t mask = (1 << 24 /* FZ */);
#endif
setFpStatusRegister ((getFpStatusRegister() & (~mask)) | (shouldEnable ? mask : 0));
#else
#if ! (defined (JUCE_INTEL) || defined (JUCE_ARM))
jassertfalse; // No support for flush to zero mode on your platform
#endif
ignoreUnused (shouldEnable);
#endif
}
void JUCE_CALLTYPE FloatVectorOperations::disableDenormalisedNumberSupport() noexcept
{
#if JUCE_USE_SSE_INTRINSICS || (JUCE_USE_ARM_NEON || defined (__arm64__) || defined (__aarch64__))
#if JUCE_USE_SSE_INTRINSICS
const unsigned int mxcsr = _mm_getcsr();
_mm_setcsr (mxcsr | 0x8040); // add the DAZ and FZ bits
intptr_t mask = 0x8040;
#else /*JUCE_USE_ARM_NEON*/
intptr_t mask = (1 << 24 /* FZ */) | (1 << 23 /* RMODE_1 */) | (1 << 22 /* RMODE_0 */);
#endif
setFpStatusRegister (getFpStatusRegister() | mask);
#else
#if ! (defined (JUCE_INTEL) || defined (JUCE_ARM))
jassertfalse; // No support for disable denormals mode on your platform
#endif
#endif
}
ScopedNoDenormals::ScopedNoDenormals() noexcept
{
#if JUCE_USE_SSE_INTRINSICS || (JUCE_USE_ARM_NEON || defined (__arm64__) || defined (__aarch64__))
#if JUCE_USE_SSE_INTRINSICS
intptr_t mask = 0x8040;
#else /*JUCE_USE_ARM_NEON*/
intptr_t mask = (1 << 24 /* FZ */) | (1 << 23 /* RMODE_1 */) | (1 << 22 /* RMODE_0 */);
#endif
fpsr = FloatVectorOperations::getFpStatusRegister();
FloatVectorOperations::setFpStatusRegister (fpsr | mask);
#endif
}
ScopedNoDenormals::~ScopedNoDenormals() noexcept
{
#if JUCE_USE_SSE_INTRINSICS || (JUCE_USE_ARM_NEON || defined (__arm64__) || defined (__aarch64__))
FloatVectorOperations::setFpStatusRegister (fpsr);
#endif
}
//==============================================================================