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CPUDetect x86: Detect FMA support

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This commit is contained in:
Henrik Rydgård 2013-11-13 10:46:49 +01:00
parent 836820b41e
commit a0c6b18134
2 changed files with 15 additions and 13 deletions
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13
Common/CPUDetect.cpp
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@ -45,8 +45,7 @@
#include <machine/cpufunc.h>
#elif !defined(MIPS)
void __cpuidex(int regs[4], int cpuid_leaf, int ecxval)
{
void __cpuidex(int regs[4], int cpuid_leaf, int ecxval) {
#ifdef ANDROID
// Use the /dev/cpu/%i/cpuid interface
int f = open("/dev/cpu/0/cpuid", O_RDONLY);
@ -90,8 +89,7 @@ CPUInfo::CPUInfo() {
}
// Detects the various cpu features
void CPUInfo::Detect()
{
void CPUInfo::Detect() {
memset(this, 0, sizeof(*this));
#ifdef _M_IX86
Mode64bit = false;
@ -154,7 +152,11 @@ void CPUInfo::Detect()
if ((cpu_id[2] >> 9) & 1) bSSSE3 = true;
if ((cpu_id[2] >> 19) & 1) bSSE4_1 = true;
if ((cpu_id[2] >> 20) & 1) bSSE4_2 = true;
if ((cpu_id[2] >> 28) & 1) bAVX = true;
if ((cpu_id[2] >> 28) & 1) {
bAVX = true;
if ((cpu_id[2] >> 12) & 1)
bFMA = true;
}
if ((cpu_id[2] >> 25) & 1) bAES = true;
}
if (max_ex_fn >= 0x80000004) {
@ -231,6 +233,7 @@ std::string CPUInfo::Summarize()
if (bSSE4_2) sum += ", SSE4.2";
if (HTT) sum += ", HTT";
if (bAVX) sum += ", AVX";
if (bAVX) sum += ", FMA";
if (bAES) sum += ", AES";
if (bLongMode) sum += ", 64-bit support";
return sum;

15
Common/CPUDetect.h
View File

@ -21,24 +21,22 @@
#include <string>
enum CPUVendor
{
enum CPUVendor {
VENDOR_INTEL = 0,
VENDOR_AMD = 1,
VENDOR_ARM = 2,
VENDOR_OTHER = 3,
};
struct CPUInfo
{
struct CPUInfo {
CPUVendor vendor;
char cpu_string[0x21];
char brand_string[0x41];
bool OS64bit;
bool CPU64bit;
bool Mode64bit;
bool HTT;
int num_cores;
int logical_cpu_count;
@ -53,10 +51,11 @@ struct CPUInfo
bool bLZCNT;
bool bSSE4A;
bool bAVX;
bool bFMA;
bool bAES;
bool bLAHFSAHF64;
bool bLongMode;
// ARM specific CPUInfo
bool bSwp;
bool bHalf;
@ -79,7 +78,7 @@ struct CPUInfo
// Call Detect()
explicit CPUInfo();
// Turn the cpu info into a string we can show
std::string Summarize();