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| author | Uros Bizjak <ubizjak@gmail.com> | 2020-11-27 10:59:43 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-12-04 18:13:15 +1100 |
| commit | 0b837f1ef8822a8df880ffba6778ba42f707b83d (patch) | |
| tree | 9beacab75a609c0e294fe52bd5d3a822f1c4d121 /arch/x86/crypto | |
| parent | 032d049ea0f45b45c21f3f02b542aa18bc6b6428 (diff) | |
| download | linux-0b837f1ef8822a8df880ffba6778ba42f707b83d.tar.bz2 | |
crypto: x86/sha512 - Use TEST %reg,%reg instead of CMP $0,%reg
CMP $0,%reg can't set overflow flag, so we can use shorter TEST %reg,%reg
instruction when only zero and sign flags are checked (E,L,LE,G,GE conditions).
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/sha512-avx-asm.S | 2 | ||||
| -rw-r--r-- | arch/x86/crypto/sha512-ssse3-asm.S | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/crypto/sha512-avx-asm.S b/arch/x86/crypto/sha512-avx-asm.S index 63470fd6ae32..684d58c8bc4f 100644 --- a/arch/x86/crypto/sha512-avx-asm.S +++ b/arch/x86/crypto/sha512-avx-asm.S @@ -278,7 +278,7 @@ frame_size = frame_GPRSAVE + GPRSAVE_SIZE # "blocks" is the message length in SHA512 blocks ######################################################################## SYM_FUNC_START(sha512_transform_avx) - cmp $0, msglen + test msglen, msglen je nowork # Allocate Stack Space diff --git a/arch/x86/crypto/sha512-ssse3-asm.S b/arch/x86/crypto/sha512-ssse3-asm.S index 7946a1bee85b..50812af0b083 100644 --- a/arch/x86/crypto/sha512-ssse3-asm.S +++ b/arch/x86/crypto/sha512-ssse3-asm.S @@ -280,7 +280,7 @@ frame_size = frame_GPRSAVE + GPRSAVE_SIZE ######################################################################## SYM_FUNC_START(sha512_transform_ssse3) - cmp $0, msglen + test msglen, msglen je nowork # Allocate Stack Space |