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cpuid ifdefs fixed to remove some duplicate code cases.

Browse Source 
BUG=none
TESTED=local windows build
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/47619004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1332 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2015-03-16 20:02:04 +00:00
parent df90670aa5
commit 35f0add66d
1 changed files with 23 additions and 21 deletions
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44
source/cpu_id.cc
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@ -43,17 +43,17 @@ extern "C" {
#define SAFEBUFFERS
#endif
// Low level cpuid for X86. Returns zeros on other CPUs.
#if !defined(__pnacl__) && !defined(__CLR_VER) && \
(defined(_M_IX86) || defined(_M_X64) || \
defined(__i386__) || defined(__x86_64__))
// Low level cpuid for X86.
#if (defined(_M_IX86) || defined(_M_X64) || \
defined(__i386__) || defined(__x86_64__)) && \
!defined(__pnacl__) && !defined(__CLR_VER)
LIBYUV_API
void CpuId(uint32 info_eax, uint32 info_ecx, uint32* cpu_info) {
#if defined(_MSC_VER) && !defined(__clang__)
// Visual C version uses intrinsic or inline x86 assembly.
#if (_MSC_FULL_VER >= 160040219)
__cpuidex((int*)(cpu_info), info_eax, info_ecx);
#endif
#if defined(_M_IX86)
#elif defined(_M_IX86)
__asm {
mov eax, info_eax
mov ecx, info_ecx
@ -71,7 +71,8 @@ void CpuId(uint32 info_eax, uint32 info_ecx, uint32* cpu_info) {
cpu_info[3] = cpu_info[2] = cpu_info[1] = cpu_info[0] = 0;
}
#endif
#else // defined(_MSC_VER)
// GCC version uses inline x86 assembly.
#else // defined(_MSC_VER) && !defined(__clang__)
uint32 info_ebx, info_edx;
asm volatile ( // NOLINT
#if defined( __i386__) && defined(__PIC__)
@ -89,36 +90,37 @@ void CpuId(uint32 info_eax, uint32 info_ecx, uint32* cpu_info) {
cpu_info[1] = info_ebx;
cpu_info[2] = info_ecx;
cpu_info[3] = info_edx;
#endif // defined(_MSC_VER)
#endif // defined(_MSC_VER) && !defined(__clang__)
}
#else // (defined(_M_IX86) || defined(_M_X64) ...
LIBYUV_API
void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) {
cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
}
#endif
#if !defined(__native_client__)
// TODO(fbarchard): Enable xgetbv when validator supports it.
#if (defined(_M_IX86) || defined(_M_X64) || \
defined(__i386__) || defined(__x86_64__)) && \
!defined(__pnacl__) && !defined(__CLR_VER) && !defined(__native_client__)
#define HAS_XGETBV
// X86 CPUs have xgetbv to detect OS saves high parts of ymm registers.
int TestOsSaveYmm() {
uint32 xcr0 = 0u;
#if defined(_MSC_VER) && (_MSC_FULL_VER >= 160040219)
xcr0 = (uint32)(_xgetbv(0)); // VS2010 SP1 required.
#endif
#if defined(_M_IX86) && defined(_MSC_VER)
#elif defined(_M_IX86) && defined(_MSC_VER) && !defined(__clang__)
__asm {
xor ecx, ecx // xcr 0
_asm _emit 0x0f _asm _emit 0x01 _asm _emit 0xd0 // For VS2010 and earlier.
mov xcr0, eax
}
#endif
#if defined(__i386__) || defined(__x86_64__)
#elif defined(__i386__) || defined(__x86_64__)
asm(".byte 0x0f, 0x01, 0xd0" : "=a" (xcr0) : "c" (0) : "%edx");
#endif // defined(_MSC_VER)
#endif // defined(__i386__) || defined(__x86_64__)
return((xcr0 & 6) == 6); // Is ymm saved?
}
#endif // !defined(__native_client__)
#else
LIBYUV_API
void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) {
cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
}
#endif
#endif // defined(_M_IX86) || defined(_M_X64) ..
// based on libvpx arm_cpudetect.c
// For Arm, but public to allow testing on any CPU