diff options
| author | Andy Polyakov <appro@openssl.org> | 2007-04-01 17:28:08 +0000 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2007-04-01 17:28:08 +0000 |
| commit | 162f677def843739f4984d674b4ad33eb726e7ea (patch) | |
| tree | 73897035de9fdcf42991bb2530f488a6ca1663df /crypto/x86cpuid.pl | |
| parent | 287546242539e686ef1233d0a7c57c935fb61c3f (diff) | |
Update x86cpuid.pl to correctly detect shared cache and to support new
RC4_set_key.
Diffstat (limited to 'crypto/x86cpuid.pl')
| -rw-r--r-- | crypto/x86cpuid.pl | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl index c53c9bc998..7d924a60b7 100644 --- a/crypto/x86cpuid.pl +++ b/crypto/x86cpuid.pl @@ -20,12 +20,36 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } &xor ("ecx","eax"); &bt ("ecx",21); &jnc (&label("nocpuid")); + &xor ("eax","eax"); + &cpuid (); + &xor ("eax","eax"); + &cmp ("ebx",0x756e6547); # "Genu" + &setne (&LB("eax")); + &mov ("ebp","eax"); + &cmp ("edx",0x49656e69); # "ineI" + &setne (&LB("eax")); + &or ("ebp","eax"); + &cmp ("ecx",0x6c65746e); # "ntel" + &setne (&LB("eax")); + &or ("ebp","eax"); &mov ("eax",1); &cpuid (); + &bt ("edx",28); # test hyper-threading bit + &jnc (&label("nocpuid")); + &cmp ("ebp",0); + &jne (&label("notintel")); + &or ("edx",1<<20); # use reserved bit to engage RC4_CHAR +&set_label("notintel"); + &shr ("ebx",16); + &cmp (&LB("ebx"),1); # see if cache is shared(*) + &ja (&label("nocpuid")); + &and ("edx",~(1<<28)); # clear hyper-threading bit if not &set_label("nocpuid"); &mov ("eax","edx"); &mov ("edx","ecx"); &function_end("OPENSSL_ia32_cpuid"); +# (*) on Core2 this value is set to 2 denoting the fact that L2 +# cache is shared between cores. &external_label("OPENSSL_ia32cap_P"); |