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| #! /usr/bin/env perl
| # Copyright 2014-2020 The OpenSSL Project Authors. All Rights Reserved.
| #
| # Licensed under the OpenSSL license (the "License"). You may not use
| # this file except in compliance with the License. You can obtain a copy
| # in the file LICENSE in the source distribution or at
| # https://www.openssl.org/source/license.html
|
| #
| # ====================================================================
| # 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 further improvement.
|
| # May 2016
| #
| # 2x aggregated reduction improves performance by 50% (resulting
| # performance on POWER8 is 1 cycle per processed byte), and 4x
| # aggregated reduction - by 170% or 2.7x (resulting in 0.55 cpb).
| # POWER9 delivers 0.51 cpb.
|
| $flavour=shift;
| $output =shift;
|
| if ($flavour =~ /64/) {
| $SIZE_T=8;
| $LRSAVE=2*$SIZE_T;
| $STU="stdu";
| $POP="ld";
| $PUSH="std";
| $UCMP="cmpld";
| $SHRI="srdi";
| } elsif ($flavour =~ /32/) {
| $SIZE_T=4;
| $LRSAVE=$SIZE_T;
| $STU="stwu";
| $POP="lwz";
| $PUSH="stw";
| $UCMP="cmplw";
| $SHRI="srwi";
| } else { die "nonsense $flavour"; }
|
| $sp="r1";
| $FRAME=6*$SIZE_T+13*16; # 13*16 is for v20-v31 offload
|
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $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$_",(4..12));
| my ($Xl1,$Xm1,$Xh1,$IN1,$H2,$H2h,$H2l)=map("v$_",(13..19));
| my $vrsave="r12";
|
| $code=<<___;
| .machine "any"
|
| .text
|
| .globl .gcm_init_p8
| .align 5
| .gcm_init_p8:
| li r0,-4096
| li r8,0x10
| mfspr $vrsave,256
| li r9,0x20
| mtspr 256,r0
| li r10,0x30
| lvx_u $H,0,r4 # load H
|
| 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 $IN,$H,$t1 # twisted H
|
| vsldoi $H,$IN,$IN,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
| li r8,0x40
| stvx_u $H, r9,r3
| li r9,0x50
| stvx_u $Hh,r10,r3
| li r10,0x60
|
| vpmsumd $Xl,$IN,$Hl # H.lo·H.lo
| vpmsumd $Xm,$IN,$H # H.hi·H.lo+H.lo·H.hi
| vpmsumd $Xh,$IN,$Hh # H.hi·H.hi
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction 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 reduction phase
| vpmsumd $Xl,$Xl,$xC2
| vxor $t1,$t1,$Xh
| vxor $IN1,$Xl,$t1
|
| vsldoi $H2,$IN1,$IN1,8
| vsldoi $H2l,$zero,$H2,8
| vsldoi $H2h,$H2,$zero,8
|
| stvx_u $H2l,r8,r3 # save H^2
| li r8,0x70
| stvx_u $H2,r9,r3
| li r9,0x80
| stvx_u $H2h,r10,r3
| li r10,0x90
| ___
| {
| my ($t4,$t5,$t6) = ($Hl,$H,$Hh);
| $code.=<<___;
| vpmsumd $Xl,$IN,$H2l # H.lo·H^2.lo
| vpmsumd $Xl1,$IN1,$H2l # H^2.lo·H^2.lo
| vpmsumd $Xm,$IN,$H2 # H.hi·H^2.lo+H.lo·H^2.hi
| vpmsumd $Xm1,$IN1,$H2 # H^2.hi·H^2.lo+H^2.lo·H^2.hi
| vpmsumd $Xh,$IN,$H2h # H.hi·H^2.hi
| vpmsumd $Xh1,$IN1,$H2h # H^2.hi·H^2.hi
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction phase
| vpmsumd $t6,$Xl1,$xC2 # 1st reduction phase
|
| vsldoi $t0,$Xm,$zero,8
| vsldoi $t1,$zero,$Xm,8
| vsldoi $t4,$Xm1,$zero,8
| vsldoi $t5,$zero,$Xm1,8
| vxor $Xl,$Xl,$t0
| vxor $Xh,$Xh,$t1
| vxor $Xl1,$Xl1,$t4
| vxor $Xh1,$Xh1,$t5
|
| vsldoi $Xl,$Xl,$Xl,8
| vsldoi $Xl1,$Xl1,$Xl1,8
| vxor $Xl,$Xl,$t2
| vxor $Xl1,$Xl1,$t6
|
| vsldoi $t1,$Xl,$Xl,8 # 2nd reduction phase
| vsldoi $t5,$Xl1,$Xl1,8 # 2nd reduction phase
| vpmsumd $Xl,$Xl,$xC2
| vpmsumd $Xl1,$Xl1,$xC2
| vxor $t1,$t1,$Xh
| vxor $t5,$t5,$Xh1
| vxor $Xl,$Xl,$t1
| vxor $Xl1,$Xl1,$t5
|
| vsldoi $H,$Xl,$Xl,8
| vsldoi $H2,$Xl1,$Xl1,8
| vsldoi $Hl,$zero,$H,8
| vsldoi $Hh,$H,$zero,8
| vsldoi $H2l,$zero,$H2,8
| vsldoi $H2h,$H2,$zero,8
|
| stvx_u $Hl,r8,r3 # save H^3
| li r8,0xa0
| stvx_u $H,r9,r3
| li r9,0xb0
| stvx_u $Hh,r10,r3
| li r10,0xc0
| stvx_u $H2l,r8,r3 # save H^4
| stvx_u $H2,r9,r3
| stvx_u $H2h,r10,r3
|
| mtspr 256,$vrsave
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,2,0
| .long 0
| .size .gcm_init_p8,.-.gcm_init_p8
| ___
| }
| $code.=<<___;
| .globl .gcm_gmult_p8
| .align 5
| .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·Xi.lo
| vpmsumd $Xm,$IN,$H # H.hi·Xi.lo+H.lo·Xi.hi
| vpmsumd $Xh,$IN,$Hh # H.hi·Xi.hi
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction 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 reduction 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
| .align 5
| .gcm_ghash_p8:
| li r0,-4096
| 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
| li r8,0x40
| le?lvsl $lemask,r0,r0
| lvx_u $H, r9,$Htbl
| li r9,0x50
| le?vspltisb $t0,0x07
| lvx_u $Hh,r10,$Htbl
| li r10,0x60
| le?vxor $lemask,$lemask,$t0
| lvx_u $xC2,0,$Htbl
| le?vperm $Xl,$Xl,$Xl,$lemask
| vxor $zero,$zero,$zero
|
| ${UCMP}i $len,64
| bge Lgcm_ghash_p8_4x
|
| lvx_u $IN,0,$inp
| addi $inp,$inp,16
| subic. $len,$len,16
| le?vperm $IN,$IN,$IN,$lemask
| vxor $IN,$IN,$Xl
| beq Lshort
|
| lvx_u $H2l,r8,$Htbl # load H^2
| li r8,16
| lvx_u $H2, r9,$Htbl
| add r9,$inp,$len # end of input
| lvx_u $H2h,r10,$Htbl
| be?b Loop_2x
|
| .align 5
| Loop_2x:
| lvx_u $IN1,0,$inp
| le?vperm $IN1,$IN1,$IN1,$lemask
|
| subic $len,$len,32
| vpmsumd $Xl,$IN,$H2l # H^2.lo·Xi.lo
| vpmsumd $Xl1,$IN1,$Hl # H.lo·Xi+1.lo
| subfe r0,r0,r0 # borrow?-1:0
| vpmsumd $Xm,$IN,$H2 # H^2.hi·Xi.lo+H^2.lo·Xi.hi
| vpmsumd $Xm1,$IN1,$H # H.hi·Xi+1.lo+H.lo·Xi+1.hi
| and r0,r0,$len
| vpmsumd $Xh,$IN,$H2h # H^2.hi·Xi.hi
| vpmsumd $Xh1,$IN1,$Hh # H.hi·Xi+1.hi
| add $inp,$inp,r0
|
| vxor $Xl,$Xl,$Xl1
| vxor $Xm,$Xm,$Xm1
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction phase
|
| vsldoi $t0,$Xm,$zero,8
| vsldoi $t1,$zero,$Xm,8
| vxor $Xh,$Xh,$Xh1
| vxor $Xl,$Xl,$t0
| vxor $Xh,$Xh,$t1
|
| vsldoi $Xl,$Xl,$Xl,8
| vxor $Xl,$Xl,$t2
| lvx_u $IN,r8,$inp
| addi $inp,$inp,32
|
| vsldoi $t1,$Xl,$Xl,8 # 2nd reduction phase
| vpmsumd $Xl,$Xl,$xC2
| le?vperm $IN,$IN,$IN,$lemask
| vxor $t1,$t1,$Xh
| vxor $IN,$IN,$t1
| vxor $IN,$IN,$Xl
| $UCMP r9,$inp
| bgt Loop_2x # done yet?
|
| cmplwi $len,0
| bne Leven
|
| Lshort:
| vpmsumd $Xl,$IN,$Hl # H.lo·Xi.lo
| vpmsumd $Xm,$IN,$H # H.hi·Xi.lo+H.lo·Xi.hi
| vpmsumd $Xh,$IN,$Hh # H.hi·Xi.hi
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction 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 reduction phase
| vpmsumd $Xl,$Xl,$xC2
| vxor $t1,$t1,$Xh
|
| Leven:
| vxor $Xl,$Xl,$t1
| le?vperm $Xl,$Xl,$Xl,$lemask
| stvx_u $Xl,0,$Xip # write out Xi
|
| mtspr 256,$vrsave
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,4,0
| .long 0
| ___
| {
| my ($Xl3,$Xm2,$IN2,$H3l,$H3,$H3h,
| $Xh3,$Xm3,$IN3,$H4l,$H4,$H4h) = map("v$_",(20..31));
| my $IN0=$IN;
| my ($H21l,$H21h,$loperm,$hiperm) = ($Hl,$Hh,$H2l,$H2h);
|
| $code.=<<___;
| .align 5
| .gcm_ghash_p8_4x:
| Lgcm_ghash_p8_4x:
| $STU $sp,-$FRAME($sp)
| li r10,`15+6*$SIZE_T`
| li r11,`31+6*$SIZE_T`
| stvx v20,r10,$sp
| addi r10,r10,32
| stvx v21,r11,$sp
| addi r11,r11,32
| stvx v22,r10,$sp
| addi r10,r10,32
| stvx v23,r11,$sp
| addi r11,r11,32
| stvx v24,r10,$sp
| addi r10,r10,32
| stvx v25,r11,$sp
| addi r11,r11,32
| stvx v26,r10,$sp
| addi r10,r10,32
| stvx v27,r11,$sp
| addi r11,r11,32
| stvx v28,r10,$sp
| addi r10,r10,32
| stvx v29,r11,$sp
| addi r11,r11,32
| stvx v30,r10,$sp
| li r10,0x60
| stvx v31,r11,$sp
| li r0,-1
| stw $vrsave,`$FRAME-4`($sp) # save vrsave
| mtspr 256,r0 # preserve all AltiVec registers
|
| lvsl $t0,0,r8 # 0x0001..0e0f
| #lvx_u $H2l,r8,$Htbl # load H^2
| li r8,0x70
| lvx_u $H2, r9,$Htbl
| li r9,0x80
| vspltisb $t1,8 # 0x0808..0808
| #lvx_u $H2h,r10,$Htbl
| li r10,0x90
| lvx_u $H3l,r8,$Htbl # load H^3
| li r8,0xa0
| lvx_u $H3, r9,$Htbl
| li r9,0xb0
| lvx_u $H3h,r10,$Htbl
| li r10,0xc0
| lvx_u $H4l,r8,$Htbl # load H^4
| li r8,0x10
| lvx_u $H4, r9,$Htbl
| li r9,0x20
| lvx_u $H4h,r10,$Htbl
| li r10,0x30
|
| vsldoi $t2,$zero,$t1,8 # 0x0000..0808
| vaddubm $hiperm,$t0,$t2 # 0x0001..1617
| vaddubm $loperm,$t1,$hiperm # 0x0809..1e1f
|
| $SHRI $len,$len,4 # this allows to use sign bit
| # as carry
| lvx_u $IN0,0,$inp # load input
| lvx_u $IN1,r8,$inp
| subic. $len,$len,8
| lvx_u $IN2,r9,$inp
| lvx_u $IN3,r10,$inp
| addi $inp,$inp,0x40
| le?vperm $IN0,$IN0,$IN0,$lemask
| le?vperm $IN1,$IN1,$IN1,$lemask
| le?vperm $IN2,$IN2,$IN2,$lemask
| le?vperm $IN3,$IN3,$IN3,$lemask
|
| vxor $Xh,$IN0,$Xl
|
| vpmsumd $Xl1,$IN1,$H3l
| vpmsumd $Xm1,$IN1,$H3
| vpmsumd $Xh1,$IN1,$H3h
|
| vperm $H21l,$H2,$H,$hiperm
| vperm $t0,$IN2,$IN3,$loperm
| vperm $H21h,$H2,$H,$loperm
| vperm $t1,$IN2,$IN3,$hiperm
| vpmsumd $Xm2,$IN2,$H2 # H^2.lo·Xi+2.hi+H^2.hi·Xi+2.lo
| vpmsumd $Xl3,$t0,$H21l # H^2.lo·Xi+2.lo+H.lo·Xi+3.lo
| vpmsumd $Xm3,$IN3,$H # H.hi·Xi+3.lo +H.lo·Xi+3.hi
| vpmsumd $Xh3,$t1,$H21h # H^2.hi·Xi+2.hi+H.hi·Xi+3.hi
|
| vxor $Xm2,$Xm2,$Xm1
| vxor $Xl3,$Xl3,$Xl1
| vxor $Xm3,$Xm3,$Xm2
| vxor $Xh3,$Xh3,$Xh1
|
| blt Ltail_4x
|
| Loop_4x:
| lvx_u $IN0,0,$inp
| lvx_u $IN1,r8,$inp
| subic. $len,$len,4
| lvx_u $IN2,r9,$inp
| lvx_u $IN3,r10,$inp
| addi $inp,$inp,0x40
| le?vperm $IN1,$IN1,$IN1,$lemask
| le?vperm $IN2,$IN2,$IN2,$lemask
| le?vperm $IN3,$IN3,$IN3,$lemask
| le?vperm $IN0,$IN0,$IN0,$lemask
|
| vpmsumd $Xl,$Xh,$H4l # H^4.lo·Xi.lo
| vpmsumd $Xm,$Xh,$H4 # H^4.hi·Xi.lo+H^4.lo·Xi.hi
| vpmsumd $Xh,$Xh,$H4h # H^4.hi·Xi.hi
| vpmsumd $Xl1,$IN1,$H3l
| vpmsumd $Xm1,$IN1,$H3
| vpmsumd $Xh1,$IN1,$H3h
|
| vxor $Xl,$Xl,$Xl3
| vxor $Xm,$Xm,$Xm3
| vxor $Xh,$Xh,$Xh3
| vperm $t0,$IN2,$IN3,$loperm
| vperm $t1,$IN2,$IN3,$hiperm
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction phase
| vpmsumd $Xl3,$t0,$H21l # H.lo·Xi+3.lo +H^2.lo·Xi+2.lo
| vpmsumd $Xh3,$t1,$H21h # H.hi·Xi+3.hi +H^2.hi·Xi+2.hi
|
| 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 reduction phase
| vpmsumd $Xm2,$IN2,$H2 # H^2.hi·Xi+2.lo+H^2.lo·Xi+2.hi
| vpmsumd $Xm3,$IN3,$H # H.hi·Xi+3.lo +H.lo·Xi+3.hi
| vpmsumd $Xl,$Xl,$xC2
|
| vxor $Xl3,$Xl3,$Xl1
| vxor $Xh3,$Xh3,$Xh1
| vxor $Xh,$Xh,$IN0
| vxor $Xm2,$Xm2,$Xm1
| vxor $Xh,$Xh,$t1
| vxor $Xm3,$Xm3,$Xm2
| vxor $Xh,$Xh,$Xl
| bge Loop_4x
|
| Ltail_4x:
| vpmsumd $Xl,$Xh,$H4l # H^4.lo·Xi.lo
| vpmsumd $Xm,$Xh,$H4 # H^4.hi·Xi.lo+H^4.lo·Xi.hi
| vpmsumd $Xh,$Xh,$H4h # H^4.hi·Xi.hi
|
| vxor $Xl,$Xl,$Xl3
| vxor $Xm,$Xm,$Xm3
|
| vpmsumd $t2,$Xl,$xC2 # 1st reduction phase
|
| vsldoi $t0,$Xm,$zero,8
| vsldoi $t1,$zero,$Xm,8
| vxor $Xh,$Xh,$Xh3
| vxor $Xl,$Xl,$t0
| vxor $Xh,$Xh,$t1
|
| vsldoi $Xl,$Xl,$Xl,8
| vxor $Xl,$Xl,$t2
|
| vsldoi $t1,$Xl,$Xl,8 # 2nd reduction phase
| vpmsumd $Xl,$Xl,$xC2
| vxor $t1,$t1,$Xh
| vxor $Xl,$Xl,$t1
|
| addic. $len,$len,4
| beq Ldone_4x
|
| lvx_u $IN0,0,$inp
| ${UCMP}i $len,2
| li $len,-4
| blt Lone
| lvx_u $IN1,r8,$inp
| beq Ltwo
|
| Lthree:
| lvx_u $IN2,r9,$inp
| le?vperm $IN0,$IN0,$IN0,$lemask
| le?vperm $IN1,$IN1,$IN1,$lemask
| le?vperm $IN2,$IN2,$IN2,$lemask
|
| vxor $Xh,$IN0,$Xl
| vmr $H4l,$H3l
| vmr $H4, $H3
| vmr $H4h,$H3h
|
| vperm $t0,$IN1,$IN2,$loperm
| vperm $t1,$IN1,$IN2,$hiperm
| vpmsumd $Xm2,$IN1,$H2 # H^2.lo·Xi+1.hi+H^2.hi·Xi+1.lo
| vpmsumd $Xm3,$IN2,$H # H.hi·Xi+2.lo +H.lo·Xi+2.hi
| vpmsumd $Xl3,$t0,$H21l # H^2.lo·Xi+1.lo+H.lo·Xi+2.lo
| vpmsumd $Xh3,$t1,$H21h # H^2.hi·Xi+1.hi+H.hi·Xi+2.hi
|
| vxor $Xm3,$Xm3,$Xm2
| b Ltail_4x
|
| .align 4
| Ltwo:
| le?vperm $IN0,$IN0,$IN0,$lemask
| le?vperm $IN1,$IN1,$IN1,$lemask
|
| vxor $Xh,$IN0,$Xl
| vperm $t0,$zero,$IN1,$loperm
| vperm $t1,$zero,$IN1,$hiperm
|
| vsldoi $H4l,$zero,$H2,8
| vmr $H4, $H2
| vsldoi $H4h,$H2,$zero,8
|
| vpmsumd $Xl3,$t0, $H21l # H.lo·Xi+1.lo
| vpmsumd $Xm3,$IN1,$H # H.hi·Xi+1.lo+H.lo·Xi+2.hi
| vpmsumd $Xh3,$t1, $H21h # H.hi·Xi+1.hi
|
| b Ltail_4x
|
| .align 4
| Lone:
| le?vperm $IN0,$IN0,$IN0,$lemask
|
| vsldoi $H4l,$zero,$H,8
| vmr $H4, $H
| vsldoi $H4h,$H,$zero,8
|
| vxor $Xh,$IN0,$Xl
| vxor $Xl3,$Xl3,$Xl3
| vxor $Xm3,$Xm3,$Xm3
| vxor $Xh3,$Xh3,$Xh3
|
| b Ltail_4x
|
| Ldone_4x:
| le?vperm $Xl,$Xl,$Xl,$lemask
| stvx_u $Xl,0,$Xip # write out Xi
|
| li r10,`15+6*$SIZE_T`
| li r11,`31+6*$SIZE_T`
| mtspr 256,$vrsave
| lvx v20,r10,$sp
| addi r10,r10,32
| lvx v21,r11,$sp
| addi r11,r11,32
| lvx v22,r10,$sp
| addi r10,r10,32
| lvx v23,r11,$sp
| addi r11,r11,32
| lvx v24,r10,$sp
| addi r10,r10,32
| lvx v25,r11,$sp
| addi r11,r11,32
| lvx v26,r10,$sp
| addi r10,r10,32
| lvx v27,r11,$sp
| addi r11,r11,32
| lvx v28,r10,$sp
| addi r10,r10,32
| lvx v29,r11,$sp
| addi r11,r11,32
| lvx v30,r10,$sp
| lvx v31,r11,$sp
| addi $sp,$sp,$FRAME
| blr
| .long 0
| .byte 0,12,0x04,0,0x80,0,4,0
| .long 0
| ___
| }
| $code.=<<___;
| .size .gcm_ghash_p8,.-.gcm_ghash_p8
|
| .asciz "GHASH for PowerISA 2.07, CRYPTOGAMS by <appro\@openssl.org>"
| .align 2
| ___
|
| foreach (split("\n",$code)) {
| s/\`([^\`]*)\`/eval $1/geo;
|
| if ($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 or die "error closing STDOUT: $!"; # enforce flush
|
|
