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libFLAC/cpu.c: Fixes for MSVC

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MSVC is strange and perverse.
This commit is contained in:
Erik de Castro Lopo
2016-06-26 21:09:08 +10:00
parent 162a44923c
commit a08e90c425
1 changed files with 18 additions and 4 deletions
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22
src/libFLAC/cpu.c
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@@ -35,6 +35,7 @@
#endif
#include "private/cpu.h"
#include "share/compat.h"
#include <stdlib.h>
#include <memory.h>
@@ -453,6 +454,21 @@ void FLAC__cpu_info (FLAC__CPUInfo *info)
#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN
#if defined _MSC_VER || defined __INTEL_COMPILER
static inline void
cpu_id_ex (int *cpuinfo, int result)
{
// Stupid MSVC doesn't know how to optimise out:
// if (FLAC_AVC_SUPPORTER)
// __cpuidex(cpuinfo, level, 0); /* for AVX2 detection */
#if FLAC__AVX_SUPPORTED
__cpuidex(cpuinfo, result, 0); /* for AVX2 detection */
#else
__cpuid(cpuinfo, result); /* some old compilers don't support __cpuidex */
#endif
}
#endif
void FLAC__cpu_info_x86(FLAC__uint32 level, FLAC__uint32 *eax, FLAC__uint32 *ebx, FLAC__uint32 *ecx, FLAC__uint32 *edx)
{
#if defined _MSC_VER || defined __INTEL_COMPILER
@@ -463,10 +479,8 @@ void FLAC__cpu_info_x86(FLAC__uint32 level, FLAC__uint32 *eax, FLAC__uint32 *ebx
*eax = *ebx = *ecx = *edx = 0;
return;
}
if (FLAC__AVX_SUPPORTED)
__cpuidex(cpuinfo, level, 0); /* for AVX2 detection */
else
__cpuid(cpuinfo, level); /* some old compilers don't support __cpuidex */
cpu_id_ex (cpuinfo, ext);
*eax = cpuinfo[0]; *ebx = cpuinfo[1]; *ecx = cpuinfo[2]; *edx = cpuinfo[3];
#elif defined __GNUC__ && defined HAVE_CPUID_H