diff options
| author | Andy Polyakov <appro@openssl.org> | 2016-05-15 17:01:15 +0200 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2016-05-19 22:33:00 +0200 |
| commit | e33826f01bd78af76e0135c8dfab3387927a82bb (patch) | |
| tree | a44459e3859610fe7ce35bc4923d8af6d6110e09 /crypto/x86_64cpuid.pl | |
| parent | 2e6d7799ffc47604d06e0465afeb84b91aff8006 (diff) | |
Add assembly CRYPTO_memcmp.
GH: #102
Reviewed-by: Richard Levitte <levitte@openssl.org>
Diffstat (limited to 'crypto/x86_64cpuid.pl')
| -rw-r--r-- | crypto/x86_64cpuid.pl | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/crypto/x86_64cpuid.pl b/crypto/x86_64cpuid.pl index 450550bfb5..4946688d92 100644 --- a/crypto/x86_64cpuid.pl +++ b/crypto/x86_64cpuid.pl @@ -224,6 +224,28 @@ OPENSSL_cleanse: jne .Little ret .size OPENSSL_cleanse,.-OPENSSL_cleanse + +.globl CRYPTO_memcmp +.type CRYPTO_memcmp,\@abi-omnipotent +.align 16 +CRYPTO_memcmp: + xor %rax,%rax + xor %r10,%r10 + cmp \$0,$arg3 + je .Lno_data +.Loop_cmp: + mov ($arg1),%r10b + lea 1($arg1),$arg1 + xor ($arg2),%r10b + lea 1($arg2),$arg2 + or %r10b,%al + dec $arg3 + jnz .Loop_cmp + neg %rax + shr \$63,%rax +.Lno_data: + ret +.size CRYPTO_memcmp,.-CRYPTO_memcmp ___ print<<___ if (!$win64); |