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crypto: curve25519-x86_64 - Use XORL r32,32
authorUros Bizjak <ubizjak@gmail.com>
Thu, 27 Aug 2020 17:30:58 +0000 (19:30 +0200)
committerHerbert Xu <herbert@gondor.apana.org.au>
Fri, 11 Sep 2020 04:39:13 +0000 (14:39 +1000)
commitdb719539fd3889836900bf912755aa30a5985e9a
tree1bb6a97142119ddb59b9305770f12caea2cabb48tree | snapshot
parent17bce37e1b5eca95f9da783a07930b6d608c1389commit | diff
crypto: curve25519-x86_64 - Use XORL r32,32

x86_64 zero extends 32bit operations, so for 64bit operands,
XORL r32,r32 is functionally equal to XORL r64,r64, but avoids
a REX prefix byte when legacy registers are used.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
arch/x86/crypto/curve25519-x86_64.c diff | blob | history
Domain: System / Kernel;