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/armv4cpuid.pl | |
| parent | 2e6d7799ffc47604d06e0465afeb84b91aff8006 (diff) | |
Add assembly CRYPTO_memcmp.
GH: #102
Reviewed-by: Richard Levitte <levitte@openssl.org>
Diffstat (limited to 'crypto/armv4cpuid.pl')
| -rw-r--r-- | crypto/armv4cpuid.pl | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/crypto/armv4cpuid.pl b/crypto/armv4cpuid.pl index 2c02f08c74..33c893d0e4 100644 --- a/crypto/armv4cpuid.pl +++ b/crypto/armv4cpuid.pl @@ -105,6 +105,36 @@ OPENSSL_cleanse: #endif .size OPENSSL_cleanse,.-OPENSSL_cleanse +.global CRYPTO_memcmp +.type CRYPTO_memcmp,%function +.align 4 +CRYPTO_memcmp: + eor ip,ip,ip + cmp r2,#0 + beq .Lno_data + stmdb sp!,{r4,r5} + +.Loop_cmp: + ldrb r4,[r0],#1 + ldrb r5,[r1],#1 + eor r4,r4,r5 + orr ip,ip,r4 + subs r2,r2,#1 + bne .Loop_cmp + + ldmia sp!,{r4,r5} +.Lno_data: + neg r0,ip + mov r0,r0,lsr#31 +#if __ARM_ARCH__>=5 + bx lr +#else + tst lr,#1 + moveq pc,lr + .word 0xe12fff1e @ bx lr +#endif +.size CRYPTO_memcmp,.-CRYPTO_memcmp + #if __ARM_MAX_ARCH__>=7 .arch armv7-a .fpu neon |