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Add subfunc to CpuId for AVX and above

pull/461/head
Jeffrey Walton 2017-08-11 22:56:01 -04:00
parent f02503d08f
commit a84f568ee2
No known key found for this signature in database
GPG Key ID: B36AB348921B1838
1 changed files with 33 additions and 22 deletions
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55
cpu.cpp
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@ -28,11 +28,22 @@ extern "C" {
#ifdef CRYPTOPP_CPUID_AVAILABLE
#if _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
#if _MSC_VER >= 1500
bool CpuId(word32 input, word32 output[4])
static inline bool CpuId(word32 func, word32 subfunc, word32 output[4])
{
__cpuid((int *)output, input);
__cpuidex((int *)output, func, subfunc);
return true;
}
#elif _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
static inline bool CpuId(word32 func, word32 subfunc, word32 output[4])
{
if (subfunc != 0)
return false;
__cpuid((int *)output, func);
return true;
}
@ -55,15 +66,15 @@ extern "C"
}
#endif
bool CpuId(word32 input, word32 output[4])
static inline bool CpuId(word32 func, word32 subfunc, word32 output[4])
{
#if defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
__try
{
__asm
{
mov eax, input
mov ecx, 0
mov eax, func
mov ecx, subfunc
cpuid
mov edi, output
mov [edi], eax
@ -112,7 +123,7 @@ bool CpuId(word32 input, word32 output[4])
"push %%ebx; cpuid; mov %%ebx, %%edi; pop %%ebx"
# endif
: "=a" (output[0]), "=D" (output[1]), "=c" (output[2]), "=d" (output[3])
: "a" (input), "c" (0)
: "a" (func), "c" (subfunc)
: "cc"
);
}
@ -221,9 +232,9 @@ void DetectX86Features()
{
// Coverity finding CID 171239...
word32 cpuid0[4]={0}, cpuid1[4]={0}, cpuid2[4]={0};
if (!CpuId(0, cpuid0))
if (!CpuId(0, 0, cpuid0))
return;
if (!CpuId(1, cpuid1))
if (!CpuId(1, 0, cpuid1))
return;
if ((cpuid1[3] & (1 << 26)) != 0)
@ -244,9 +255,9 @@ void DetectX86Features()
g_cacheLineSize = 8 * GETBYTE(cpuid1[1], 1);
g_hasRDRAND = !!(cpuid1[2] /*ECX*/ & RDRAND_FLAG);
if (cpuid0[0] /*EAX*/ >= 7)
if (cpuid1[0] /*EAX*/ >= 7)
{
if (CpuId(7, cpuid2))
if (CpuId(7, 0, cpuid2))
{
g_hasRDSEED = !!(cpuid2[1] /*EBX*/ & RDSEED_FLAG);
g_hasSHA = !!(cpuid2[1] /*EBX*/ & SHA_FLAG);
@ -259,13 +270,13 @@ void DetectX86Features()
enum { RDSEED_FLAG = (1 << 18) };
enum { SHA_FLAG = (1 << 29) };
CpuId(0x80000005, cpuid2);
CpuId(0x80000005, 0, cpuid2);
g_cacheLineSize = GETBYTE(cpuid2[2], 0);
g_hasRDRAND = !!(cpuid1[2] /*ECX*/ & RDRAND_FLAG);
if (cpuid0[0] /*EAX*/ >= 7)
if (cpuid1[0] /*EAX*/ >= 7)
{
if (CpuId(7, cpuid2))
if (CpuId(7, 0, cpuid2))
{
g_hasRDSEED = !!(cpuid2[1] /*EBX*/ & RDSEED_FLAG);
g_hasSHA = !!(cpuid2[1] /*EBX*/ & SHA_FLAG);
@ -280,16 +291,16 @@ void DetectX86Features()
enum { PHE_FLAGS = (0x3 << 10) };
enum { PMM_FLAGS = (0x3 << 12) };
CpuId(0xC0000000, cpuid0);
if (cpuid0[0] >= 0xC0000001)
CpuId(0xC0000000, 0, cpuid2);
if (cpuid2[0] >= 0xC0000001)
{
// Extended features available
CpuId(0xC0000001, cpuid0);
g_hasPadlockRNG = !!(cpuid0[3] /*EDX*/ & RNG_FLAGS);
g_hasPadlockACE = !!(cpuid0[3] /*EDX*/ & ACE_FLAGS);
g_hasPadlockACE2 = !!(cpuid0[3] /*EDX*/ & ACE2_FLAGS);
g_hasPadlockPHE = !!(cpuid0[3] /*EDX*/ & PHE_FLAGS);
g_hasPadlockPMM = !!(cpuid0[3] /*EDX*/ & PMM_FLAGS);
CpuId(0xC0000001, 0, cpuid2);
g_hasPadlockRNG = !!(cpuid2[3] /*EDX*/ & RNG_FLAGS);
g_hasPadlockACE = !!(cpuid2[3] /*EDX*/ & ACE_FLAGS);
g_hasPadlockACE2 = !!(cpuid2[3] /*EDX*/ & ACE2_FLAGS);
g_hasPadlockPHE = !!(cpuid2[3] /*EDX*/ & PHE_FLAGS);
g_hasPadlockPMM = !!(cpuid2[3] /*EDX*/ & PMM_FLAGS);
}
}