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added check for AMD processor to asm.c

This commit is contained in:
Tim Parrish 2018-06-07 10:35:54 -06:00
parent 59067825fc
commit c6e2585fbc
1 changed files with 15 additions and 5 deletions
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20
wolfcrypt/src/asm.c
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@ -81,17 +81,27 @@ static word32 cpuid_check = 0 ;
static word32 cpuid_flags = 0 ;
static word32 cpuid_flag(word32 leaf, word32 sub, word32 num, word32 bit) {
int got_intel_cpu=0;
int got_intel_cpu = 0;
int got_amd_cpu = 0;
unsigned int reg[5];
reg[4] = '\0' ;
cpuid(reg, 0, 0);
if(memcmp((char *)&(reg[EBX]), "Genu", 4) == 0 &&
memcmp((char *)&(reg[EDX]), "ineI", 4) == 0 &&
memcmp((char *)&(reg[ECX]), "ntel", 4) == 0) {
/* check for intel cpu */
if( memcmp((char *)&(reg[EBX]), "Genu", 4) == 0 &&
memcmp((char *)&(reg[EDX]), "ineI", 4) == 0 &&
memcmp((char *)&(reg[ECX]), "ntel", 4) == 0) {
got_intel_cpu = 1;
}
if (got_intel_cpu) {
/* check for AMD cpu */
if( memcmp((char *)&(reg[EBX]), "Auth", 4) == 0 &&
memcmp((char *)&(reg[EDX]), "enti", 4) == 0 &&
memcmp((char *)&(reg[ECX]), "cAMD", 4) == 0) {
got_amd_cpu = 1;
}
if (got_intel_cpu || got_amd_cpu) {
cpuid(reg, leaf, sub);
return((reg[num]>>bit)&0x1) ;
}