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dsp/cpu: (msvs) add include for __cpuidex

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and only use it on x86 / x64 where it's available.
has the side-effect of quieting a msvs /analyze warning:
C6001: Using uninitialized memory 'cpu_info'.

(cherry picked from commit 0de5f33e31)

Change-Id: Iae51be3b22b2ee949cfc473eeea9fd9fb6b3c2cb
This commit is contained in:
James Zern 2015-01-16 16:14:49 -08:00
parent 39aa055529
commit df1081bb82
1 changed files with 3 additions and 1 deletions
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4
src/dsp/cpu.c
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@ -38,7 +38,9 @@ static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) {
: "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
: "a"(info_type), "c"(0));
}
#elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729 // >= VS2008 SP1
#elif (defined(_M_X64) || defined(_M_IX86)) && \
defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729 // >= VS2008 SP1
#include <intrin.h>
#define GetCPUInfo(info, type) __cpuidex(info, type, 0) // set ecx=0
#elif defined(WEBP_MSC_SSE2)
#define GetCPUInfo __cpuid