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dsp: add sse4.1 detection

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bit 19 in ecx
no targets or code

https://software.intel.com/en-us/articles/using-cpuid-to-detect-the-presence-of-sse-41-and-sse-42-instruction-sets

Change-Id: Ie61b004dd5b6a3639b30bd9d2a09e6d7359b8040
This commit is contained in:
James Zern 2015-03-18 19:15:45 -07:00
parent b8d706c8c2
commit cabf4bd2bc
2 changed files with 4 additions and 0 deletions
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3
src/dsp/cpu.c
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@ -87,6 +87,9 @@ static int x86CPUInfo(CPUFeature feature) {
if (feature == kSSE3) {
return 0 != (cpu_info[2] & 0x00000001);
}
if (feature == kSSE4_1) {
return 0 != (cpu_info[2] & 0x00080000);
}
if (feature == kAVX) {
// bits 27 (OSXSAVE) & 28 (256-bit AVX)
if ((cpu_info[2] & 0x18000000) == 0x18000000) {

1
src/dsp/dsp.h
View File

@ -102,6 +102,7 @@ extern "C" {
typedef enum {
kSSE2,
kSSE3,
kSSE4_1,
kAVX,
kAVX2,
kNEON,