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crypto/cast/asm/cast-586.pl: +5% on PIII and remove obsolete readme.

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Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Andy Polyakov 2014-10-01 23:55:54 +02:00
parent df8c39d522
commit ae4af7a067
2 changed files with 6 additions and 10 deletions
crypto/cast/asm
cast-586.plreadme

9
crypto/cast/asm/cast-586.pl

@ -1,6 +1,9 @@
#!/usr/local/bin/perl
# define for pentium pro friendly version
# This flag makes the inner loop one cycle longer, but generates
# code that runs %30 faster on the pentium pro/II, 44% faster
# of PIII, while only %7 slower on the pentium.
# By default, this flag is on.
$ppro=1;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
@ -140,11 +143,11 @@ sub E_CAST {
&rotl( $tmp4, &LB($tmp1));
if ($ppro) {
&mov( $tmp2, $tmp4); # B
&xor( $tmp1, $tmp1);
&mov( $tmp2, 0xff);
&movb( &LB($tmp1), &HB($tmp4)); # A
&and( $tmp2, 0xff);
&and( $tmp2, $tmp4);
&shr( $tmp4, 16); #
&xor( $tmp3, $tmp3);

7
crypto/cast/asm/readme

@ -1,7 +0,0 @@
There is a ppro flag in cast-586 which turns on/off
generation of pentium pro/II friendly code
This flag makes the inner loop one cycle longer, but generates
code that runs %30 faster on the pentium pro/II, while only %7 slower
on the pentium. By default, this flag is on.