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cpuid for older vc

Browse Source 
BUG=263
TEST=none
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/3189004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@835 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2013-10-31 19:15:12 +00:00
parent 11a0d48e45
commit bcccd6b78d
3 changed files with 42 additions and 17 deletions
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2
README.chromium
View File

@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 834
Version: 835
License: BSD
License File: LICENSE

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT
#define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 834
#define LIBYUV_VERSION 835
#endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT

55
source/cpu_id.cc
View File

@ -37,27 +37,46 @@ extern "C" {
#if !defined(__CLR_VER) && (defined(_M_IX86) || defined(_M_X64) || \
defined(__i386__) || defined(__x86_64__))
LIBYUV_API
void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) {
void CpuId(uint32 info_eax, uint32 info_ecx, uint32* cpu_info) {
#if defined(_MSC_VER)
__cpuidex(reinterpret_cast<int*>(cpu_info), eax, ecx);
#if (_MSC_FULL_VER >= 160040219)
__cpuidex(reinterpret_cast<int*>(cpu_info), info_eax, info_ecx);
#elif defined(_M_IX86)
__asm {
mov eax, info_eax
mov ecx, info_ecx
mov edi, cpu_info
cpuid
mov [edi], eax
mov [edi + 4], ebx
mov [edi + 8], ecx
mov [edi + 12], edx
}
#else
uint32 ebx, edx;
if (info_ecx == 0) {
__cpuid(reinterpret_cast<int*>(cpu_info), info_eax);
} else {
cpu_info[3] = cpu_info[2] = cpu_info[1] = cpu_info[0] = 0;
}
#endif
#else // defined(_MSC_VER)
uint32 info_ebx, info_edx;
asm volatile ( // NOLINT
#if defined( __i386__) && defined(__PIC__)
// Preserve ebx for fpic 32 bit.
"mov %%ebx, %%edi \n"
"cpuid \n"
"xchg %%edi, %%ebx \n"
: "=D" (ebx),
: "=D" (info_ebx),
#else
"cpuid \n"
: "=b" (ebx),
: "=b" (info_ebx),
#endif // defined( __i386__) && defined(__PIC__)
"+a" (eax), "+c" (ecx), "=d" (edx));
cpu_info[0] = eax;
cpu_info[1] = ebx;
cpu_info[2] = ecx;
cpu_info[3] = edx;
"+a" (info_eax), "+c" (info_ecx), "=d" (info_edx));
cpu_info[0] = info_eax;
cpu_info[1] = info_ebx;
cpu_info[2] = info_ecx;
cpu_info[3] = info_edx;
#endif // defined(_MSC_VER)
}
@ -89,14 +108,17 @@ void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) {
// based on libvpx arm_cpudetect.c
// For Arm, but public to allow testing on any CPU
#if defined(_MSC_VER)
__declspec(safebuffers)
#endif
LIBYUV_API
int ArmCpuCaps(const char* cpuinfo_name) {
FILE* f = fopen(cpuinfo_name, "r");
if (f) {
char buf[512];
while (fgets(buf, 511, f)) {
if (memcmp(buf, "Features", 8) == 0) {
char* p = strstr(buf, " neon");
char cpuinfo_line[512];
while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f)) {
if (memcmp(cpuinfo_line, "Features", 8) == 0) {
char* p = strstr(cpuinfo_line, " neon");
if (p && (p[5] == ' ' || p[5] == '\n')) {
fclose(f);
return kCpuHasNEON;
@ -114,7 +136,7 @@ static int MipsCpuCaps(const char* search_string) {
char cpuinfo_line[256];
FILE* f = NULL;
if ((f = fopen(file_name, "r")) != NULL) {
while (fgets(cpuinfo_line, sizeof(cpuinfo_line), f) != NULL) {
while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f) != NULL) {
if (strstr(cpuinfo_line, search_string) != NULL) {
fclose(f);
return kCpuHasMIPS_DSP;
@ -149,6 +171,9 @@ static bool TestEnv(const char*) {
}
#endif
#if defined(_MSC_VER)
__declspec(safebuffers)
#endif
LIBYUV_API
int InitCpuFlags(void) {
#if !defined(__CLR_VER) && defined(CPU_X86)