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[scsynth][supernova] fix Windows not guarding denormals #4504

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merged 2 commits into from
Feb 15, 2020
Merged

[scsynth][supernova] fix Windows not guarding denormals #4504

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18e51ef
[scsynth] use boost.predef for checking SIMD
jrsurge Aug 4, 2019
ff2c03d
[supernova] use boost.predef for checking SIMD
jrsurge Aug 4, 2019
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24 changes: 8 additions & 16 deletions server/scsynth/SC_World.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,12 @@

#include "malloc_aligned.hpp"

#include <boost/predef/hardware.h>

#ifdef BOOST_HW_SIMD_AVAILABLE >= BOOST_HW_SIMD_X86_SSE_VERSION
# include <xmmintrin.h>
#endif

// undefine the shadowed scfft functions
#undef scfft_create
#undef scfft_dofft
Expand Down Expand Up @@ -148,26 +154,12 @@ void zfree(void* ptr) { return free_alig(ptr); }
////////////////////////////////////////////////////////////////////////////////

// Set denormal FTZ mode on CPUs that need/support it.
void sc_SetDenormalFlags();

#ifdef __SSE2__
# include <xmmintrin.h>

void sc_SetDenormalFlags() {
#if BOOST_HW_SIMD_X86 >= BOOST_HW_SIMD_X86_SSE_VERSION
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
_mm_setcsr(_mm_getcsr() | 0x40); // DAZ
}

#elif defined(__SSE__)
# include <xmmintrin.h>

void sc_SetDenormalFlags() { _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON); }

#else

void sc_SetDenormalFlags() {}

#endif
}

////////////////////////////////////////////////////////////////////////////////

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4 changes: 3 additions & 1 deletion server/supernova/server/server.cpp
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Expand Up @@ -36,6 +36,8 @@
# include <CoreAudio/CoreAudioTypes.h>
#endif

#include <boost/predef/hardware.h>

namespace nova {

class nova_server* instance = nullptr;
Expand Down Expand Up @@ -207,7 +209,7 @@ static void name_current_thread(int thread_index) {
}

static void set_daz_ftz(void) {
#ifdef __SSE__
#if BOOST_HW_SIMD_X86 >= BOOST_X86_SSE_VERSION
/* denormal handling */
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
_mm_setcsr(_mm_getcsr() | 0x40);
Expand Down