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Merge pull request #122 from volvet/core_number_detect_fix

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Core number detect fix
This commit is contained in:
Ethan Hugg 2014-01-11 11:29:45 -08:00
commit 4a8a9aabc1
2 changed files with 26 additions and 7 deletions
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25
codec/common/cpu.cpp
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@ -55,6 +55,7 @@ uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors) {
uint32_t uiFeatureA = 0, uiFeatureB = 0, uiFeatureC = 0, uiFeatureD = 0;
int32_t CacheLineSize = 0;
int8_t chVenderName[16] = { 0 };
uint32_t uiMaxCpuidLevel = 0;
if (!WelsCPUIdVerify()) {
/* cpuid is not supported in cpu */
@ -62,7 +63,8 @@ uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors) {
}
WelsCPUId (0, &uiFeatureA, (uint32_t*)&chVenderName[0], (uint32_t*)&chVenderName[8], (uint32_t*)&chVenderName[4]);
if (uiFeatureA == 0) {
uiMaxCpuidLevel = uiFeatureA;
if (uiMaxCpuidLevel == 0) {
/* maximum input value for basic cpuid information */
return 0;
}
@ -90,7 +92,8 @@ uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors) {
/* CMOV instruction checking */
uiCPU |= WELS_CPU_CMOV;
}
if (!strcmp ((const str_t*)chVenderName, CPU_Vender_INTEL)) { // confirmed_safe_unsafe_usage
if ((!strcmp ((const str_t*)chVenderName, CPU_Vender_INTEL)) ||
(!strcmp((const str_t*)chVenderName, CPU_Vender_AMD)) ) { // confirmed_safe_unsafe_usage
if (uiFeatureD & 0x10000000) {
/* Multi-Threading checking: contains of multiple logic processors */
uiCPU |= WELS_CPU_HTT;
@ -130,9 +133,21 @@ uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors) {
uiCPU |= WELS_CPU_MOVBE;
}
if (pNumberOfLogicProcessors != NULL) {
// HTT enabled on chip
*pNumberOfLogicProcessors = (uiFeatureB & 0x00ff0000) >> 16; // feature bits: 23-16 on returned EBX
if( pNumberOfLogicProcessors != NULL ){
if( uiCPU & WELS_CPU_HTT){
*pNumberOfLogicProcessors = (uiFeatureB & 0x00ff0000) >> 16; // feature bits: 23-16 on returned EBX
} else {
*pNumberOfLogicProcessors = 1;
}
if( !strcmp((const str_t*)chVenderName, CPU_Vender_INTEL) ){
if( uiMaxCpuidLevel >= 4 ){
uiFeatureC = 0;
WelsCPUId(0x4, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
if( uiFeatureA != 0 ){
*pNumberOfLogicProcessors = ((uiFeatureA&0xfc000000)>>26) + 1;
}
}
}
}
WelsCPUId (0x80000000, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);

4
codec/common/cpuid.asm
View File

@ -85,6 +85,7 @@ WelsCPUId:
push rdx
mov eax, ecx
mov rcx, [r9]
cpuid
mov [r9], ecx
mov [r8], ebx
@ -103,6 +104,7 @@ WelsCPUId:
push rdx
mov eax, edi
mov rcx, [rcx]
cpuid
mov [r8], edx
pop rdx
@ -121,6 +123,8 @@ WelsCPUId:
push edi
mov eax, [esp+12] ; operating index
mov edi, [esp+24]
mov ecx, [edi]
cpuid ; cpuid
; processing various information return