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Merge pull request #8049 from kencooke/master

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Use shared CPUDetect.h for CPU detection
This commit is contained in:
Brad Hefta-Gaub 2016-06-10 08:25:27 -07:00 committed by GitHub
commit fda91677f8
2 changed files with 6 additions and 57 deletions
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61
libraries/audio/src/AudioHRTF.cpp
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@ -10,7 +10,6 @@
//
#include <math.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
@ -119,68 +118,18 @@ static void FIR_1x4_SSE(float* src, float* dst0, float* dst1, float* dst2, float
}
}
//
// Detect AVX/AVX2 support
//
#if defined(_MSC_VER)
#include <intrin.h>
static bool cpuSupportsAVX() {
int info[4];
int mask = (1 << 27) | (1 << 28); // OSXSAVE and AVX
__cpuidex(info, 0x1, 0);
bool result = false;
if ((info[2] & mask) == mask) {
if ((_xgetbv(_XCR_XFEATURE_ENABLED_MASK) & 0x6) == 0x6) {
result = true;
}
}
return result;
}
#elif defined(__GNUC__)
#include <cpuid.h>
static bool cpuSupportsAVX() {
unsigned int eax, ebx, ecx, edx;
unsigned int mask = (1 << 27) | (1 << 28); // OSXSAVE and AVX
bool result = false;
if (__get_cpuid(0x1, &eax, &ebx, &ecx, &edx) && ((ecx & mask) == mask)) {
__asm__("xgetbv" : "=a"(eax), "=d"(edx) : "c"(0));
if ((eax & 0x6) == 0x6) {
result = true;
}
}
return result;
}
#else
static bool cpuSupportsAVX() {
return false;
}
#endif
//
// Runtime CPU dispatch
//
typedef void FIR_1x4_t(float* src, float* dst0, float* dst1, float* dst2, float* dst3, float coef[4][HRTF_TAPS], int numFrames);
FIR_1x4_t FIR_1x4_AVX; // separate compilation with VEX-encoding enabled
#include "CPUDetect.h"
void FIR_1x4_AVX(float* src, float* dst0, float* dst1, float* dst2, float* dst3, float coef[4][HRTF_TAPS], int numFrames);
static void FIR_1x4(float* src, float* dst0, float* dst1, float* dst2, float* dst3, float coef[4][HRTF_TAPS], int numFrames) {
static FIR_1x4_t* f = cpuSupportsAVX() ? FIR_1x4_AVX : FIR_1x4_SSE; // init on first call
(*f)(src, dst0, dst1, dst2, dst3, coef, numFrames); // dispatch
static auto f = cpuSupportsAVX() ? FIR_1x4_AVX : FIR_1x4_SSE;
(*f)(src, dst0, dst1, dst2, dst3, coef, numFrames); // dispatch
}
// 4 channel planar to interleaved

2
libraries/audio/src/AudioHRTF.h
View file

@ -32,7 +32,7 @@ public:
// input: mono source
// output: interleaved stereo mix buffer (accumulates into existing output)
// index: HRTF subject index
// azimuth: clockwise panning angle [0, 360] in degrees
// azimuth: clockwise panning angle in radians
// gain: gain factor for distance attenuation
// numFrames: must be HRTF_BLOCK in this version
//