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Use SSE intrinsics to set FTZ and DAZ

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This commit is contained in:
Chris Robinson 2019-03-18 20:14:40 -07:00
parent 6a0b2ed0ca
commit 2de1d17bc6
2 changed files with 18 additions and 3 deletions
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2
Alc/fpu_modes.h
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@ -2,7 +2,7 @@
#define FPU_MODES_H
class FPUCtl {
#if defined(__GNUC__) && defined(HAVE_SSE)
#if defined(HAVE_SSE_INTRINSICS) || (defined(__GNUC__) && defined(HAVE_SSE))
unsigned int sse_state{};
#elif defined(HAVE___CONTROL87_2)
unsigned int state{};

19
Alc/helpers.cpp
View File

@ -89,6 +89,9 @@ DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_GUID, 0x1da5d803, 0xd492, 0x4edd, 0x8c, 0x
#ifdef HAVE_CPUID_H
#include <cpuid.h>
#endif
#ifdef HAVE_SSE_INTRINSICS
#include <xmmintrin.h>
#endif
#ifdef HAVE_SYS_SYSCONF_H
#include <sys/sysconf.h>
#endif
@ -261,7 +264,15 @@ void FillCPUCaps(int capfilter)
FPUCtl::FPUCtl() noexcept
{
#if defined(__GNUC__) && defined(HAVE_SSE)
#if defined(HAVE_SSE_INTRINSICS)
this->sse_state = _mm_getcsr();
unsigned int sseState = this->sse_state;
sseState |= 0x8000; /* set flush-to-zero */
sseState |= 0x0040; /* set denormals-are-zero */
_mm_setcsr(sseState);
#elif defined(__GNUC__) && defined(HAVE_SSE)
if((CPUCapFlags&CPU_CAP_SSE))
{
__asm__ __volatile__("stmxcsr %0" : "=m" (*&this->sse_state));
@ -290,7 +301,11 @@ void FPUCtl::leave() noexcept
{
if(!this->in_mode) return;
#if defined(__GNUC__) && defined(HAVE_SSE)
#if defined(HAVE_SSE_INTRINSICS)
_mm_setcsr(this->sse_state);
#elif defined(__GNUC__) && defined(HAVE_SSE)
if((CPUCapFlags&CPU_CAP_SSE))
__asm__ __volatile__("ldmxcsr %0" : : "m" (*&this->sse_state));