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Add detection of AVX2

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This commit is contained in:
brly 2015-05-10 20:03:41 +09:00
parent f1d1af0d34
commit b7fb9414c5
2 changed files with 10 additions and 0 deletions
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1
codec/common/inc/cpu_core.h
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@ -67,6 +67,7 @@
#define WELS_CPU_MOVBE 0x00008000 /* MOVBE instruction */
#define WELS_CPU_AES 0x00010000 /* AES instruction extensions */
#define WELS_CPU_FMA 0x00020000 /* AVX VEX FMA instruction sets */
#define WELS_CPU_AVX2 0x00040000 /* AVX2 */
#define WELS_CPU_CACHELINE_16 0x10000000 /* CacheLine Size 16 */
#define WELS_CPU_CACHELINE_32 0x20000000 /* CacheLine Size 32 */

9
codec/common/src/cpu.cpp
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@ -136,6 +136,15 @@ uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors) {
uiCPU |= WELS_CPU_MOVBE;
}
if (uiMaxCpuidLevel >= 7) {
uiFeatureC = 0;
WelsCPUId (7, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
if ((uiCPU & WELS_CPU_AVX) && (uiFeatureB & 0x00000020)) {
/* AVX2 supported */
uiCPU |= WELS_CPU_AVX2;
}
}
if (pNumberOfLogicProcessors != NULL) {
if (uiCPU & WELS_CPU_HTT) {
*pNumberOfLogicProcessors = (uiFeatureB & 0x00ff0000) >> 16; // feature bits: 23-16 on returned EBX