"Eric Biggers" <ebiggers@xxxxxxxxxx> wrote:
> +.macro do_4rounds i, m0, m1, m2, m3
> +.if \i < 16
> + movdqu \i*4(DATA_PTR), MSG
> + pshufb SHUF_MASK, MSG
> + movdqa MSG, \m0
> +.else
> + movdqa \m0, MSG
> +.endif
> + paddd \i*4(SHA256CONSTANTS), MSG
To load the round constant independent from and parallel to the previous
instructions which use \m0 I recommend to change the first lines of the
do_4rounds macro as follows (this might save 1+ cycle per macro invocation,
and most obviously 2 lines):
.macro do_4rounds i, m0, m1, m2, m3
.if \i < 16
movdqu \i*4(DATA_PTR), \m0
pshufb SHUF_MASK, \m0
.endif
movdqa \i*4(SHA256CONSTANTS), MSG
paddd \m0, MSG
...
regards
Stefan
