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10% performance tweak in 64-bit mode.

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This commit is contained in:
Andy Polyakov 2007-09-27 06:19:25 +00:00
parent 67c8e7f414
commit d7e915616d
1 changed files with 71 additions and 0 deletions
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71
crypto/aes/asm/aes-ppc.pl
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@ -880,6 +880,12 @@ Lppc_AES_decrypt_compact:
addi $key,$key,16
ori $mask80,$mask80,0x8080
ori $mask1b,$mask1b,0x1b1b
___
$code.=<<___ if ($SIZE_T==8);
insrdi $mask80,$mask80,32,0
insrdi $mask1b,$mask1b,32,0
___
$code.=<<___;
mtctr $acc00
.align 4
Ldec_compact_loop:
@ -942,7 +948,70 @@ Ldec_compact_loop:
addi $key,$key,16
bdz Ldec_compact_done
___
$code.=<<___ if ($SIZE_T==8);
# vectorized permutation improves decrypt performance by 10%
insrdi $s0,$s1,32,0
insrdi $s2,$s3,32,0
and $acc00,$s0,$mask80 # r1=r0&0x80808080
and $acc02,$s2,$mask80
srdi $acc04,$acc00,7 # r1>>7
srdi $acc06,$acc02,7
andc $acc08,$s0,$mask80 # r0&0x7f7f7f7f
andc $acc10,$s2,$mask80
sub $acc00,$acc00,$acc04 # r1-(r1>>7)
sub $acc02,$acc02,$acc06
add $acc08,$acc08,$acc08 # (r0&0x7f7f7f7f)<<1
add $acc10,$acc10,$acc10
and $acc00,$acc00,$mask1b # (r1-(r1>>7))&0x1b1b1b1b
and $acc02,$acc02,$mask1b
xor $acc00,$acc00,$acc08 # r2
xor $acc02,$acc02,$acc10
and $acc04,$acc00,$mask80 # r1=r2&0x80808080
and $acc06,$acc02,$mask80
srdi $acc08,$acc04,7 # r1>>7
srdi $acc10,$acc06,7
andc $acc12,$acc00,$mask80 # r2&0x7f7f7f7f
andc $acc14,$acc02,$mask80
sub $acc04,$acc04,$acc08 # r1-(r1>>7)
sub $acc06,$acc06,$acc10
add $acc12,$acc12,$acc12 # (r2&0x7f7f7f7f)<<1
add $acc14,$acc14,$acc14
and $acc04,$acc04,$mask1b # (r1-(r1>>7))&0x1b1b1b1b
and $acc06,$acc06,$mask1b
xor $acc04,$acc04,$acc12 # r4
xor $acc06,$acc06,$acc14
and $acc08,$acc04,$mask80 # r1=r4&0x80808080
and $acc10,$acc06,$mask80
srdi $acc12,$acc08,7 # r1>>7
srdi $acc14,$acc10,7
sub $acc08,$acc08,$acc12 # r1-(r1>>7)
sub $acc10,$acc10,$acc14
andc $acc12,$acc04,$mask80 # r4&0x7f7f7f7f
andc $acc14,$acc06,$mask80
add $acc12,$acc12,$acc12 # (r4&0x7f7f7f7f)<<1
add $acc14,$acc14,$acc14
and $acc08,$acc08,$mask1b # (r1-(r1>>7))&0x1b1b1b1b
and $acc10,$acc10,$mask1b
xor $acc08,$acc08,$acc12 # r8
xor $acc10,$acc10,$acc14
xor $acc00,$acc00,$s0 # r2^r0
xor $acc02,$acc02,$s2
xor $acc04,$acc04,$s0 # r4^r0
xor $acc06,$acc06,$s2
extrdi $acc01,$acc00,0,32
extrdi $acc03,$acc02,0,32
extrdi $acc05,$acc04,0,32
extrdi $acc07,$acc06,0,32
extrdi $acc09,$acc08,0,32
extrdi $acc11,$acc10,0,32
___
$code.=<<___ if ($SIZE_T==4);
and $acc00,$s0,$mask80 # r1=r0&0x80808080
and $acc01,$s1,$mask80
and $acc02,$s2,$mask80
@ -1038,6 +1107,8 @@ Ldec_compact_loop:
xor $acc05,$acc05,$s1
xor $acc06,$acc06,$s2
xor $acc07,$acc07,$s3
___
$code.=<<___;
rotrwi $s0,$s0,8 # = ROTATE(r0,8)
rotrwi $s1,$s1,8
rotrwi $s2,$s2,8