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>
# "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
########################################################################
SYM_FUNC_START(sha512_transform_ssse3)
- cmp $0, msglen
+ test msglen, msglen
je nowork
# Allocate Stack Space