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Add Hygon Dhyana support to enable RDRAND/RDSEED/ADX/AVX2 Feature (PR #765) 

Hugh, interesting.

Thank you very much.

Ping @randombit. Botan may want or need this, too.
pull/766/head
hygonsoc 2018-12-21 06:33:16 +08:00 committed by Jeffrey Walton
parent 398964b87d
commit 6dfb428f10
1 changed files with 9 additions and 1 deletions
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10
cpu.cpp
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@ -280,6 +280,14 @@ static inline bool IsAMD(const word32 output[4])
(output[3] /*EDX*/ == 0x69746E65); (output[3] /*EDX*/ == 0x69746E65);
} }
static inline bool IsHygon(const word32 output[4])
{
// This is the "HygonGenuine" string.
return (output[1] /*EBX*/ == 0x6f677948) &&
(output[2] /*ECX*/ == 0x656e6975) &&
(output[3] /*EDX*/ == 0x6e65476e);
}
static inline bool IsVIA(const word32 output[4]) static inline bool IsVIA(const word32 output[4])
{ {
// This is the "CentaurHauls" string. Some non-PadLock's can return "VIA VIA VIA " // This is the "CentaurHauls" string. Some non-PadLock's can return "VIA VIA VIA "
@ -383,7 +391,7 @@ void DetectX86Features()
} }
} }
} }
else if (IsAMD(cpuid0)) else if (IsAMD(cpuid0) || IsHygon(cpuid0))
{ {
CRYPTOPP_CONSTANT(RDRAND_FLAG = (1 << 30)) CRYPTOPP_CONSTANT(RDRAND_FLAG = (1 << 30))
CRYPTOPP_CONSTANT(RDSEED_FLAG = (1 << 18)) CRYPTOPP_CONSTANT(RDSEED_FLAG = (1 << 18))