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| author | James Zern <jzern@google.com> | 2015-01-12 17:58:57 -0800 |
|---|---|---|
| committer | James Zern <jzern@google.com> | 2015-03-03 17:53:41 -0800 |
| commit | 8508ab99a7df1b77278f0fc305ec2a6307c76928 (patch) | |
| tree | 352ec30a089ca03c56b759602412f0225fe018f3 | |
| parent | 5769623b6f5e3ea9c4946f198781723807d6bd83 (diff) | |
| download | libwebp-8508ab99a7df1b77278f0fc305ec2a6307c76928.tar.gz | |
cpu: fix AVX2 detection for gcc/clang targets
ecx needs to be set to 0; the visual studio builds were already doing
this.
https://software.intel.com/en-us/articles/how-to-detect-new-instruction-support-in-the-4th-generation-intel-core-processor-family
(cherry picked from commit d7c4b02a57bcab6a42ee5b6277c3da39a404e2a7)
Change-Id: I95efb115b4d50bbdb6b14fca2aa63d0a24974e55
| -rw-r--r-- | src/dsp/cpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/dsp/cpu.c b/src/dsp/cpu.c index 8754f874..3557ae02 100644 --- a/src/dsp/cpu.c +++ b/src/dsp/cpu.c @@ -29,14 +29,14 @@ static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { "cpuid\n" "xchg %%edi, %%ebx\n" : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) - : "a"(info_type)); + : "a"(info_type), "c"(0)); } #elif defined(__i386__) || defined(__x86_64__) static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { __asm__ volatile ( "cpuid\n" : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) - : "a"(info_type)); + : "a"(info_type), "c"(0)); } #elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729 // >= VS2008 SP1 #define GetCPUInfo(info, type) __cpuidex(info, type, 0) // set ecx=0 |