234 lines
5.2 KiB
Raku
234 lines
5.2 KiB
Raku
#!/usr/bin/env perl
|
||
#
|
||
# ====================================================================
|
||
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
|
||
# project. The module is, however, dual licensed under OpenSSL and
|
||
# CRYPTOGAMS licenses depending on where you obtain it. For further
|
||
# details see http://www.openssl.org/~appro/cryptogams/.
|
||
# ====================================================================
|
||
#
|
||
# GHASH for for PowerISA v2.07.
|
||
#
|
||
# July 2014
|
||
#
|
||
# Accurate performance measurements are problematic, because it's
|
||
# always virtualized setup with possibly throttled processor.
|
||
# Relative comparison is therefore more informative. This initial
|
||
# version is ~2.1x slower than hardware-assisted AES-128-CTR, ~12x
|
||
# faster than "4-bit" integer-only compiler-generated 64-bit code.
|
||
# "Initial version" means that there is room for futher improvement.
|
||
|
||
$flavour=shift;
|
||
$output =shift;
|
||
|
||
if ($flavour =~ /64/) {
|
||
$SIZE_T=8;
|
||
$LRSAVE=2*$SIZE_T;
|
||
$STU="stdu";
|
||
$POP="ld";
|
||
$PUSH="std";
|
||
} elsif ($flavour =~ /32/) {
|
||
$SIZE_T=4;
|
||
$LRSAVE=$SIZE_T;
|
||
$STU="stwu";
|
||
$POP="lwz";
|
||
$PUSH="stw";
|
||
} else { die "nonsense $flavour"; }
|
||
|
||
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
|
||
( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
|
||
( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
|
||
die "can't locate ppc-xlate.pl";
|
||
|
||
open STDOUT,"| $^X $xlate $flavour $output" || die "can't call $xlate: $!";
|
||
|
||
my ($Xip,$Htbl,$inp,$len)=map("r$_",(3..6)); # argument block
|
||
|
||
my ($Xl,$Xm,$Xh,$IN)=map("v$_",(0..3));
|
||
my ($zero,$t0,$t1,$t2,$xC2,$H,$Hh,$Hl,$lemask)=map("v$_",(4..12));
|
||
my $vrsave="r12";
|
||
|
||
$code=<<___;
|
||
.machine "any"
|
||
|
||
.text
|
||
|
||
.globl .gcm_init_p8
|
||
lis r0,0xfff0
|
||
li r8,0x10
|
||
mfspr $vrsave,256
|
||
li r9,0x20
|
||
mtspr 256,r0
|
||
li r10,0x30
|
||
lvx_u $H,0,r4 # load H
|
||
le?xor r7,r7,r7
|
||
le?addi r7,r7,0x8 # need a vperm start with 08
|
||
le?lvsr 5,0,r7
|
||
le?vspltisb 6,0x0f
|
||
le?vxor 5,5,6 # set a b-endian mask
|
||
le?vperm $H,$H,$H,5
|
||
|
||
vspltisb $xC2,-16 # 0xf0
|
||
vspltisb $t0,1 # one
|
||
vaddubm $xC2,$xC2,$xC2 # 0xe0
|
||
vxor $zero,$zero,$zero
|
||
vor $xC2,$xC2,$t0 # 0xe1
|
||
vsldoi $xC2,$xC2,$zero,15 # 0xe1...
|
||
vsldoi $t1,$zero,$t0,1 # ...1
|
||
vaddubm $xC2,$xC2,$xC2 # 0xc2...
|
||
vspltisb $t2,7
|
||
vor $xC2,$xC2,$t1 # 0xc2....01
|
||
vspltb $t1,$H,0 # most significant byte
|
||
vsl $H,$H,$t0 # H<<=1
|
||
vsrab $t1,$t1,$t2 # broadcast carry bit
|
||
vand $t1,$t1,$xC2
|
||
vxor $H,$H,$t1 # twisted H
|
||
|
||
vsldoi $H,$H,$H,8 # twist even more ...
|
||
vsldoi $xC2,$zero,$xC2,8 # 0xc2.0
|
||
vsldoi $Hl,$zero,$H,8 # ... and split
|
||
vsldoi $Hh,$H,$zero,8
|
||
|
||
stvx_u $xC2,0,r3 # save pre-computed table
|
||
stvx_u $Hl,r8,r3
|
||
stvx_u $H, r9,r3
|
||
stvx_u $Hh,r10,r3
|
||
|
||
mtspr 256,$vrsave
|
||
blr
|
||
.long 0
|
||
.byte 0,12,0x14,0,0,0,2,0
|
||
.long 0
|
||
.size .gcm_init_p8,.-.gcm_init_p8
|
||
|
||
.globl .gcm_gmult_p8
|
||
lis r0,0xfff8
|
||
li r8,0x10
|
||
mfspr $vrsave,256
|
||
li r9,0x20
|
||
mtspr 256,r0
|
||
li r10,0x30
|
||
lvx_u $IN,0,$Xip # load Xi
|
||
|
||
lvx_u $Hl,r8,$Htbl # load pre-computed table
|
||
le?lvsl $lemask,r0,r0
|
||
lvx_u $H, r9,$Htbl
|
||
le?vspltisb $t0,0x07
|
||
lvx_u $Hh,r10,$Htbl
|
||
le?vxor $lemask,$lemask,$t0
|
||
lvx_u $xC2,0,$Htbl
|
||
le?vperm $IN,$IN,$IN,$lemask
|
||
vxor $zero,$zero,$zero
|
||
|
||
vpmsumd $Xl,$IN,$Hl # H.lo<6C>Xi.lo
|
||
vpmsumd $Xm,$IN,$H # H.hi<68>Xi.lo+H.lo<6C>Xi.hi
|
||
vpmsumd $Xh,$IN,$Hh # H.hi<68>Xi.hi
|
||
|
||
vpmsumd $t2,$Xl,$xC2 # 1st phase
|
||
|
||
vsldoi $t0,$Xm,$zero,8
|
||
vsldoi $t1,$zero,$Xm,8
|
||
vxor $Xl,$Xl,$t0
|
||
vxor $Xh,$Xh,$t1
|
||
|
||
vsldoi $Xl,$Xl,$Xl,8
|
||
vxor $Xl,$Xl,$t2
|
||
|
||
vsldoi $t1,$Xl,$Xl,8 # 2nd phase
|
||
vpmsumd $Xl,$Xl,$xC2
|
||
vxor $t1,$t1,$Xh
|
||
vxor $Xl,$Xl,$t1
|
||
|
||
le?vperm $Xl,$Xl,$Xl,$lemask
|
||
stvx_u $Xl,0,$Xip # write out Xi
|
||
|
||
mtspr 256,$vrsave
|
||
blr
|
||
.long 0
|
||
.byte 0,12,0x14,0,0,0,2,0
|
||
.long 0
|
||
.size .gcm_gmult_p8,.-.gcm_gmult_p8
|
||
|
||
.globl .gcm_ghash_p8
|
||
lis r0,0xfff8
|
||
li r8,0x10
|
||
mfspr $vrsave,256
|
||
li r9,0x20
|
||
mtspr 256,r0
|
||
li r10,0x30
|
||
lvx_u $Xl,0,$Xip # load Xi
|
||
|
||
lvx_u $Hl,r8,$Htbl # load pre-computed table
|
||
le?lvsl $lemask,r0,r0
|
||
lvx_u $H, r9,$Htbl
|
||
le?vspltisb $t0,0x07
|
||
lvx_u $Hh,r10,$Htbl
|
||
le?vxor $lemask,$lemask,$t0
|
||
lvx_u $xC2,0,$Htbl
|
||
le?vperm $Xl,$Xl,$Xl,$lemask
|
||
vxor $zero,$zero,$zero
|
||
|
||
lvx_u $IN,0,$inp
|
||
addi $inp,$inp,16
|
||
subi $len,$len,16
|
||
le?vperm $IN,$IN,$IN,$lemask
|
||
vxor $IN,$IN,$Xl
|
||
b Loop
|
||
|
||
.align 5
|
||
Loop:
|
||
subic $len,$len,16
|
||
vpmsumd $Xl,$IN,$Hl # H.lo<6C>Xi.lo
|
||
subfe. r0,r0,r0 # borrow?-1:0
|
||
vpmsumd $Xm,$IN,$H # H.hi<68>Xi.lo+H.lo<6C>Xi.hi
|
||
and r0,r0,$len
|
||
vpmsumd $Xh,$IN,$Hh # H.hi<68>Xi.hi
|
||
add $inp,$inp,r0
|
||
|
||
vpmsumd $t2,$Xl,$xC2 # 1st phase
|
||
|
||
vsldoi $t0,$Xm,$zero,8
|
||
vsldoi $t1,$zero,$Xm,8
|
||
vxor $Xl,$Xl,$t0
|
||
vxor $Xh,$Xh,$t1
|
||
|
||
vsldoi $Xl,$Xl,$Xl,8
|
||
vxor $Xl,$Xl,$t2
|
||
lvx_u $IN,0,$inp
|
||
addi $inp,$inp,16
|
||
|
||
vsldoi $t1,$Xl,$Xl,8 # 2nd phase
|
||
vpmsumd $Xl,$Xl,$xC2
|
||
le?vperm $IN,$IN,$IN,$lemask
|
||
vxor $t1,$t1,$Xh
|
||
vxor $IN,$IN,$t1
|
||
vxor $IN,$IN,$Xl
|
||
beq Loop # did $len-=16 borrow?
|
||
|
||
vxor $Xl,$Xl,$t1
|
||
le?vperm $Xl,$Xl,$Xl,$lemask
|
||
stvx_u $Xl,0,$Xip # write out Xi
|
||
|
||
mtspr 256,$vrsave
|
||
blr
|
||
.long 0
|
||
.byte 0,12,0x14,0,0,0,4,0
|
||
.long 0
|
||
.size .gcm_ghash_p8,.-.gcm_ghash_p8
|
||
|
||
.asciz "GHASH for PowerISA 2.07, CRYPTOGAMS by <appro\@openssl.org>"
|
||
.align 2
|
||
___
|
||
|
||
foreach (split("\n",$code)) {
|
||
if ($flavour =~ /le$/o) { # little-endian
|
||
s/le\?//o or
|
||
s/be\?/#be#/o;
|
||
} else {
|
||
s/le\?/#le#/o or
|
||
s/be\?//o;
|
||
}
|
||
print $_,"\n";
|
||
}
|
||
|
||
close STDOUT; # enforce flush
|