Commit 0b837f1e authored by Uros Bizjak's avatar Uros Bizjak Committed by Herbert Xu
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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: default avatarUros 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: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 032d049e

arch/x86/crypto/sha512-avx-asm.S

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/x86/crypto/sha512-ssse3-asm.S

+1 −1
Original line number Diff line number Diff line
@@ -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