| #! /usr/bin/env perl |
| # SPDX-License-Identifier: GPL-2.0 |
| |
| # This code is taken from CRYPTOGAMs[1] and is included here using the option |
| # in the license to distribute the code under the GPL. Therefore this program |
| # is free software; you can redistribute it and/or modify it under the terms of |
| # the GNU General Public License version 2 as published by the Free Software |
| # Foundation. |
| # |
| # [1] https://www.openssl.org/~appro/cryptogams/ |
| |
| # Copyright (c) 2006-2017, CRYPTOGAMS by <appro@openssl.org> |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # * Redistributions of source code must retain copyright notices, |
| # this list of conditions and the following disclaimer. |
| # |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following |
| # disclaimer in the documentation and/or other materials |
| # provided with the distribution. |
| # |
| # * Neither the name of the CRYPTOGAMS nor the names of its |
| # copyright holder and contributors may be used to endorse or |
| # promote products derived from this software without specific |
| # prior written permission. |
| # |
| # ALTERNATIVELY, provided that this notice is retained in full, this |
| # product may be distributed under the terms of the GNU General Public |
| # License (GPL), in which case the provisions of the GPL apply INSTEAD OF |
| # those given above. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| # ==================================================================== |
| # 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 https://www.openssl.org/~appro/cryptogams/. |
| # ==================================================================== |
| # |
| # This module implements support for AES instructions as per PowerISA |
| # specification version 2.07, first implemented by POWER8 processor. |
| # The module is endian-agnostic in sense that it supports both big- |
| # and little-endian cases. Data alignment in parallelizable modes is |
| # handled with VSX loads and stores, which implies MSR.VSX flag being |
| # set. It should also be noted that ISA specification doesn't prohibit |
| # alignment exceptions for these instructions on page boundaries. |
| # Initially alignment was handled in pure AltiVec/VMX way [when data |
| # is aligned programmatically, which in turn guarantees exception- |
| # free execution], but it turned to hamper performance when vcipher |
| # instructions are interleaved. It's reckoned that eventual |
| # misalignment penalties at page boundaries are in average lower |
| # than additional overhead in pure AltiVec approach. |
| # |
| # May 2016 |
| # |
| # Add XTS subroutine, 9x on little- and 12x improvement on big-endian |
| # systems were measured. |
| # |
| ###################################################################### |
| # Current large-block performance in cycles per byte processed with |
| # 128-bit key (less is better). |
| # |
| # CBC en-/decrypt CTR XTS |
| # POWER8[le] 3.96/0.72 0.74 1.1 |
| # POWER8[be] 3.75/0.65 0.66 1.0 |
| |
| $flavour = shift; |
| |
| if ($flavour =~ /64/) { |
| $SIZE_T =8; |
| $LRSAVE =2*$SIZE_T; |
| $STU ="stdu"; |
| $POP ="ld"; |
| $PUSH ="std"; |
| $UCMP ="cmpld"; |
| $SHL ="sldi"; |
| } elsif ($flavour =~ /32/) { |
| $SIZE_T =4; |
| $LRSAVE =$SIZE_T; |
| $STU ="stwu"; |
| $POP ="lwz"; |
| $PUSH ="stw"; |
| $UCMP ="cmplw"; |
| $SHL ="slwi"; |
| } else { die "nonsense $flavour"; } |
| |
| $LITTLE_ENDIAN = ($flavour=~/le$/) ? $SIZE_T : 0; |
| |
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $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 ".shift || die "can't call $xlate: $!"; |
| |
| $FRAME=8*$SIZE_T; |
| $prefix="aes_p8"; |
| |
| $sp="r1"; |
| $vrsave="r12"; |
| |
| ######################################################################### |
| {{{ # Key setup procedures # |
| my ($inp,$bits,$out,$ptr,$cnt,$rounds)=map("r$_",(3..8)); |
| my ($zero,$in0,$in1,$key,$rcon,$mask,$tmp)=map("v$_",(0..6)); |
| my ($stage,$outperm,$outmask,$outhead,$outtail)=map("v$_",(7..11)); |
| |
| $code.=<<___; |
| .machine "any" |
| |
| .text |
| |
| .align 7 |
| rcon: |
| .long 0x01000000, 0x01000000, 0x01000000, 0x01000000 ?rev |
| .long 0x1b000000, 0x1b000000, 0x1b000000, 0x1b000000 ?rev |
| .long 0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c ?rev |
| .long 0,0,0,0 ?asis |
| Lconsts: |
| mflr r0 |
| bcl 20,31,\$+4 |
| mflr $ptr #vvvvv "distance between . and rcon |
| addi $ptr,$ptr,-0x48 |
| mtlr r0 |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,0,0 |
| .asciz "AES for PowerISA 2.07, CRYPTOGAMS by <appro\@openssl.org>" |
| |
| .globl .${prefix}_set_encrypt_key |
| Lset_encrypt_key: |
| mflr r11 |
| $PUSH r11,$LRSAVE($sp) |
| |
| li $ptr,-1 |
| ${UCMP}i $inp,0 |
| beq- Lenc_key_abort # if ($inp==0) return -1; |
| ${UCMP}i $out,0 |
| beq- Lenc_key_abort # if ($out==0) return -1; |
| li $ptr,-2 |
| cmpwi $bits,128 |
| blt- Lenc_key_abort |
| cmpwi $bits,256 |
| bgt- Lenc_key_abort |
| andi. r0,$bits,0x3f |
| bne- Lenc_key_abort |
| |
| lis r0,0xfff0 |
| mfspr $vrsave,256 |
| mtspr 256,r0 |
| |
| bl Lconsts |
| mtlr r11 |
| |
| neg r9,$inp |
| lvx $in0,0,$inp |
| addi $inp,$inp,15 # 15 is not typo |
| lvsr $key,0,r9 # borrow $key |
| li r8,0x20 |
| cmpwi $bits,192 |
| lvx $in1,0,$inp |
| le?vspltisb $mask,0x0f # borrow $mask |
| lvx $rcon,0,$ptr |
| le?vxor $key,$key,$mask # adjust for byte swap |
| lvx $mask,r8,$ptr |
| addi $ptr,$ptr,0x10 |
| vperm $in0,$in0,$in1,$key # align [and byte swap in LE] |
| li $cnt,8 |
| vxor $zero,$zero,$zero |
| mtctr $cnt |
| |
| ?lvsr $outperm,0,$out |
| vspltisb $outmask,-1 |
| lvx $outhead,0,$out |
| ?vperm $outmask,$zero,$outmask,$outperm |
| |
| blt Loop128 |
| addi $inp,$inp,8 |
| beq L192 |
| addi $inp,$inp,8 |
| b L256 |
| |
| .align 4 |
| Loop128: |
| vperm $key,$in0,$in0,$mask # rotate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vcipherlast $key,$key,$rcon |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vadduwm $rcon,$rcon,$rcon |
| vxor $in0,$in0,$key |
| bdnz Loop128 |
| |
| lvx $rcon,0,$ptr # last two round keys |
| |
| vperm $key,$in0,$in0,$mask # rotate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vcipherlast $key,$key,$rcon |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vadduwm $rcon,$rcon,$rcon |
| vxor $in0,$in0,$key |
| |
| vperm $key,$in0,$in0,$mask # rotate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vcipherlast $key,$key,$rcon |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vxor $in0,$in0,$key |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| stvx $stage,0,$out |
| |
| addi $inp,$out,15 # 15 is not typo |
| addi $out,$out,0x50 |
| |
| li $rounds,10 |
| b Ldone |
| |
| .align 4 |
| L192: |
| lvx $tmp,0,$inp |
| li $cnt,4 |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| vperm $in1,$in1,$tmp,$key # align [and byte swap in LE] |
| vspltisb $key,8 # borrow $key |
| mtctr $cnt |
| vsububm $mask,$mask,$key # adjust the mask |
| |
| Loop192: |
| vperm $key,$in1,$in1,$mask # roate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vcipherlast $key,$key,$rcon |
| |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| |
| vsldoi $stage,$zero,$in1,8 |
| vspltw $tmp,$in0,3 |
| vxor $tmp,$tmp,$in1 |
| vsldoi $in1,$zero,$in1,12 # >>32 |
| vadduwm $rcon,$rcon,$rcon |
| vxor $in1,$in1,$tmp |
| vxor $in0,$in0,$key |
| vxor $in1,$in1,$key |
| vsldoi $stage,$stage,$in0,8 |
| |
| vperm $key,$in1,$in1,$mask # rotate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vperm $outtail,$stage,$stage,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vcipherlast $key,$key,$rcon |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vsldoi $stage,$in0,$in1,8 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vperm $outtail,$stage,$stage,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vspltw $tmp,$in0,3 |
| vxor $tmp,$tmp,$in1 |
| vsldoi $in1,$zero,$in1,12 # >>32 |
| vadduwm $rcon,$rcon,$rcon |
| vxor $in1,$in1,$tmp |
| vxor $in0,$in0,$key |
| vxor $in1,$in1,$key |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| stvx $stage,0,$out |
| addi $inp,$out,15 # 15 is not typo |
| addi $out,$out,16 |
| bdnz Loop192 |
| |
| li $rounds,12 |
| addi $out,$out,0x20 |
| b Ldone |
| |
| .align 4 |
| L256: |
| lvx $tmp,0,$inp |
| li $cnt,7 |
| li $rounds,14 |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| vperm $in1,$in1,$tmp,$key # align [and byte swap in LE] |
| mtctr $cnt |
| |
| Loop256: |
| vperm $key,$in1,$in1,$mask # rotate-n-splat |
| vsldoi $tmp,$zero,$in0,12 # >>32 |
| vperm $outtail,$in1,$in1,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| vcipherlast $key,$key,$rcon |
| stvx $stage,0,$out |
| addi $out,$out,16 |
| |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in0,$in0,$tmp |
| vadduwm $rcon,$rcon,$rcon |
| vxor $in0,$in0,$key |
| vperm $outtail,$in0,$in0,$outperm # rotate |
| vsel $stage,$outhead,$outtail,$outmask |
| vmr $outhead,$outtail |
| stvx $stage,0,$out |
| addi $inp,$out,15 # 15 is not typo |
| addi $out,$out,16 |
| bdz Ldone |
| |
| vspltw $key,$in0,3 # just splat |
| vsldoi $tmp,$zero,$in1,12 # >>32 |
| vsbox $key,$key |
| |
| vxor $in1,$in1,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in1,$in1,$tmp |
| vsldoi $tmp,$zero,$tmp,12 # >>32 |
| vxor $in1,$in1,$tmp |
| |
| vxor $in1,$in1,$key |
| b Loop256 |
| |
| .align 4 |
| Ldone: |
| lvx $in1,0,$inp # redundant in aligned case |
| vsel $in1,$outhead,$in1,$outmask |
| stvx $in1,0,$inp |
| li $ptr,0 |
| mtspr 256,$vrsave |
| stw $rounds,0($out) |
| |
| Lenc_key_abort: |
| mr r3,$ptr |
| blr |
| .long 0 |
| .byte 0,12,0x14,1,0,0,3,0 |
| .long 0 |
| .size .${prefix}_set_encrypt_key,.-.${prefix}_set_encrypt_key |
| |
| .globl .${prefix}_set_decrypt_key |
| $STU $sp,-$FRAME($sp) |
| mflr r10 |
| $PUSH r10,$FRAME+$LRSAVE($sp) |
| bl Lset_encrypt_key |
| mtlr r10 |
| |
| cmpwi r3,0 |
| bne- Ldec_key_abort |
| |
| slwi $cnt,$rounds,4 |
| subi $inp,$out,240 # first round key |
| srwi $rounds,$rounds,1 |
| add $out,$inp,$cnt # last round key |
| mtctr $rounds |
| |
| Ldeckey: |
| lwz r0, 0($inp) |
| lwz r6, 4($inp) |
| lwz r7, 8($inp) |
| lwz r8, 12($inp) |
| addi $inp,$inp,16 |
| lwz r9, 0($out) |
| lwz r10,4($out) |
| lwz r11,8($out) |
| lwz r12,12($out) |
| stw r0, 0($out) |
| stw r6, 4($out) |
| stw r7, 8($out) |
| stw r8, 12($out) |
| subi $out,$out,16 |
| stw r9, -16($inp) |
| stw r10,-12($inp) |
| stw r11,-8($inp) |
| stw r12,-4($inp) |
| bdnz Ldeckey |
| |
| xor r3,r3,r3 # return value |
| Ldec_key_abort: |
| addi $sp,$sp,$FRAME |
| blr |
| .long 0 |
| .byte 0,12,4,1,0x80,0,3,0 |
| .long 0 |
| .size .${prefix}_set_decrypt_key,.-.${prefix}_set_decrypt_key |
| ___ |
| }}} |
| ######################################################################### |
| {{{ # Single block en- and decrypt procedures # |
| sub gen_block () { |
| my $dir = shift; |
| my $n = $dir eq "de" ? "n" : ""; |
| my ($inp,$out,$key,$rounds,$idx)=map("r$_",(3..7)); |
| |
| $code.=<<___; |
| .globl .${prefix}_${dir}crypt |
| lwz $rounds,240($key) |
| lis r0,0xfc00 |
| mfspr $vrsave,256 |
| li $idx,15 # 15 is not typo |
| mtspr 256,r0 |
| |
| lvx v0,0,$inp |
| neg r11,$out |
| lvx v1,$idx,$inp |
| lvsl v2,0,$inp # inpperm |
| le?vspltisb v4,0x0f |
| ?lvsl v3,0,r11 # outperm |
| le?vxor v2,v2,v4 |
| li $idx,16 |
| vperm v0,v0,v1,v2 # align [and byte swap in LE] |
| lvx v1,0,$key |
| ?lvsl v5,0,$key # keyperm |
| srwi $rounds,$rounds,1 |
| lvx v2,$idx,$key |
| addi $idx,$idx,16 |
| subi $rounds,$rounds,1 |
| ?vperm v1,v1,v2,v5 # align round key |
| |
| vxor v0,v0,v1 |
| lvx v1,$idx,$key |
| addi $idx,$idx,16 |
| mtctr $rounds |
| |
| Loop_${dir}c: |
| ?vperm v2,v2,v1,v5 |
| v${n}cipher v0,v0,v2 |
| lvx v2,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm v1,v1,v2,v5 |
| v${n}cipher v0,v0,v1 |
| lvx v1,$idx,$key |
| addi $idx,$idx,16 |
| bdnz Loop_${dir}c |
| |
| ?vperm v2,v2,v1,v5 |
| v${n}cipher v0,v0,v2 |
| lvx v2,$idx,$key |
| ?vperm v1,v1,v2,v5 |
| v${n}cipherlast v0,v0,v1 |
| |
| vspltisb v2,-1 |
| vxor v1,v1,v1 |
| li $idx,15 # 15 is not typo |
| ?vperm v2,v1,v2,v3 # outmask |
| le?vxor v3,v3,v4 |
| lvx v1,0,$out # outhead |
| vperm v0,v0,v0,v3 # rotate [and byte swap in LE] |
| vsel v1,v1,v0,v2 |
| lvx v4,$idx,$out |
| stvx v1,0,$out |
| vsel v0,v0,v4,v2 |
| stvx v0,$idx,$out |
| |
| mtspr 256,$vrsave |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,3,0 |
| .long 0 |
| .size .${prefix}_${dir}crypt,.-.${prefix}_${dir}crypt |
| ___ |
| } |
| &gen_block("en"); |
| &gen_block("de"); |
| }}} |
| ######################################################################### |
| {{{ # CBC en- and decrypt procedures # |
| my ($inp,$out,$len,$key,$ivp,$enc,$rounds,$idx)=map("r$_",(3..10)); |
| my ($rndkey0,$rndkey1,$inout,$tmp)= map("v$_",(0..3)); |
| my ($ivec,$inptail,$inpperm,$outhead,$outperm,$outmask,$keyperm)= |
| map("v$_",(4..10)); |
| $code.=<<___; |
| .globl .${prefix}_cbc_encrypt |
| ${UCMP}i $len,16 |
| bltlr- |
| |
| cmpwi $enc,0 # test direction |
| lis r0,0xffe0 |
| mfspr $vrsave,256 |
| mtspr 256,r0 |
| |
| li $idx,15 |
| vxor $rndkey0,$rndkey0,$rndkey0 |
| le?vspltisb $tmp,0x0f |
| |
| lvx $ivec,0,$ivp # load [unaligned] iv |
| lvsl $inpperm,0,$ivp |
| lvx $inptail,$idx,$ivp |
| le?vxor $inpperm,$inpperm,$tmp |
| vperm $ivec,$ivec,$inptail,$inpperm |
| |
| neg r11,$inp |
| ?lvsl $keyperm,0,$key # prepare for unaligned key |
| lwz $rounds,240($key) |
| |
| lvsr $inpperm,0,r11 # prepare for unaligned load |
| lvx $inptail,0,$inp |
| addi $inp,$inp,15 # 15 is not typo |
| le?vxor $inpperm,$inpperm,$tmp |
| |
| ?lvsr $outperm,0,$out # prepare for unaligned store |
| vspltisb $outmask,-1 |
| lvx $outhead,0,$out |
| ?vperm $outmask,$rndkey0,$outmask,$outperm |
| le?vxor $outperm,$outperm,$tmp |
| |
| srwi $rounds,$rounds,1 |
| li $idx,16 |
| subi $rounds,$rounds,1 |
| beq Lcbc_dec |
| |
| Lcbc_enc: |
| vmr $inout,$inptail |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| mtctr $rounds |
| subi $len,$len,16 # len-=16 |
| |
| lvx $rndkey0,0,$key |
| vperm $inout,$inout,$inptail,$inpperm |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| vxor $inout,$inout,$ivec |
| |
| Loop_cbc_enc: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| bdnz Loop_cbc_enc |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| li $idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipherlast $ivec,$inout,$rndkey0 |
| ${UCMP}i $len,16 |
| |
| vperm $tmp,$ivec,$ivec,$outperm |
| vsel $inout,$outhead,$tmp,$outmask |
| vmr $outhead,$tmp |
| stvx $inout,0,$out |
| addi $out,$out,16 |
| bge Lcbc_enc |
| |
| b Lcbc_done |
| |
| .align 4 |
| Lcbc_dec: |
| ${UCMP}i $len,128 |
| bge _aesp8_cbc_decrypt8x |
| vmr $tmp,$inptail |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| mtctr $rounds |
| subi $len,$len,16 # len-=16 |
| |
| lvx $rndkey0,0,$key |
| vperm $tmp,$tmp,$inptail,$inpperm |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$tmp,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| |
| Loop_cbc_dec: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vncipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| bdnz Loop_cbc_dec |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| li $idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vncipherlast $inout,$inout,$rndkey0 |
| ${UCMP}i $len,16 |
| |
| vxor $inout,$inout,$ivec |
| vmr $ivec,$tmp |
| vperm $tmp,$inout,$inout,$outperm |
| vsel $inout,$outhead,$tmp,$outmask |
| vmr $outhead,$tmp |
| stvx $inout,0,$out |
| addi $out,$out,16 |
| bge Lcbc_dec |
| |
| Lcbc_done: |
| addi $out,$out,-1 |
| lvx $inout,0,$out # redundant in aligned case |
| vsel $inout,$outhead,$inout,$outmask |
| stvx $inout,0,$out |
| |
| neg $enc,$ivp # write [unaligned] iv |
| li $idx,15 # 15 is not typo |
| vxor $rndkey0,$rndkey0,$rndkey0 |
| vspltisb $outmask,-1 |
| le?vspltisb $tmp,0x0f |
| ?lvsl $outperm,0,$enc |
| ?vperm $outmask,$rndkey0,$outmask,$outperm |
| le?vxor $outperm,$outperm,$tmp |
| lvx $outhead,0,$ivp |
| vperm $ivec,$ivec,$ivec,$outperm |
| vsel $inout,$outhead,$ivec,$outmask |
| lvx $inptail,$idx,$ivp |
| stvx $inout,0,$ivp |
| vsel $inout,$ivec,$inptail,$outmask |
| stvx $inout,$idx,$ivp |
| |
| mtspr 256,$vrsave |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,6,0 |
| .long 0 |
| ___ |
| ######################################################################### |
| {{ # Optimized CBC decrypt procedure # |
| my $key_="r11"; |
| my ($x00,$x10,$x20,$x30,$x40,$x50,$x60,$x70)=map("r$_",(0,8,26..31)); |
| my ($in0, $in1, $in2, $in3, $in4, $in5, $in6, $in7 )=map("v$_",(0..3,10..13)); |
| my ($out0,$out1,$out2,$out3,$out4,$out5,$out6,$out7)=map("v$_",(14..21)); |
| my $rndkey0="v23"; # v24-v25 rotating buffer for first found keys |
| # v26-v31 last 6 round keys |
| my ($tmp,$keyperm)=($in3,$in4); # aliases with "caller", redundant assignment |
| |
| $code.=<<___; |
| .align 5 |
| _aesp8_cbc_decrypt8x: |
| $STU $sp,-`($FRAME+21*16+6*$SIZE_T)`($sp) |
| li r10,`$FRAME+8*16+15` |
| li r11,`$FRAME+8*16+31` |
| stvx v20,r10,$sp # ABI says so |
| addi r10,r10,32 |
| stvx v21,r11,$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,$sp |
| stvx v31,r11,$sp |
| li r0,-1 |
| stw $vrsave,`$FRAME+21*16-4`($sp) # save vrsave |
| li $x10,0x10 |
| $PUSH r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| li $x20,0x20 |
| $PUSH r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| li $x30,0x30 |
| $PUSH r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| li $x40,0x40 |
| $PUSH r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| li $x50,0x50 |
| $PUSH r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| li $x60,0x60 |
| $PUSH r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| li $x70,0x70 |
| mtspr 256,r0 |
| |
| subi $rounds,$rounds,3 # -4 in total |
| subi $len,$len,128 # bias |
| |
| lvx $rndkey0,$x00,$key # load key schedule |
| lvx v30,$x10,$key |
| addi $key,$key,0x20 |
| lvx v31,$x00,$key |
| ?vperm $rndkey0,$rndkey0,v30,$keyperm |
| addi $key_,$sp,$FRAME+15 |
| mtctr $rounds |
| |
| Load_cbc_dec_key: |
| ?vperm v24,v30,v31,$keyperm |
| lvx v30,$x10,$key |
| addi $key,$key,0x20 |
| stvx v24,$x00,$key_ # off-load round[1] |
| ?vperm v25,v31,v30,$keyperm |
| lvx v31,$x00,$key |
| stvx v25,$x10,$key_ # off-load round[2] |
| addi $key_,$key_,0x20 |
| bdnz Load_cbc_dec_key |
| |
| lvx v26,$x10,$key |
| ?vperm v24,v30,v31,$keyperm |
| lvx v27,$x20,$key |
| stvx v24,$x00,$key_ # off-load round[3] |
| ?vperm v25,v31,v26,$keyperm |
| lvx v28,$x30,$key |
| stvx v25,$x10,$key_ # off-load round[4] |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| ?vperm v26,v26,v27,$keyperm |
| lvx v29,$x40,$key |
| ?vperm v27,v27,v28,$keyperm |
| lvx v30,$x50,$key |
| ?vperm v28,v28,v29,$keyperm |
| lvx v31,$x60,$key |
| ?vperm v29,v29,v30,$keyperm |
| lvx $out0,$x70,$key # borrow $out0 |
| ?vperm v30,v30,v31,$keyperm |
| lvx v24,$x00,$key_ # pre-load round[1] |
| ?vperm v31,v31,$out0,$keyperm |
| lvx v25,$x10,$key_ # pre-load round[2] |
| |
| #lvx $inptail,0,$inp # "caller" already did this |
| #addi $inp,$inp,15 # 15 is not typo |
| subi $inp,$inp,15 # undo "caller" |
| |
| le?li $idx,8 |
| lvx_u $in0,$x00,$inp # load first 8 "words" |
| le?lvsl $inpperm,0,$idx |
| le?vspltisb $tmp,0x0f |
| lvx_u $in1,$x10,$inp |
| le?vxor $inpperm,$inpperm,$tmp # transform for lvx_u/stvx_u |
| lvx_u $in2,$x20,$inp |
| le?vperm $in0,$in0,$in0,$inpperm |
| lvx_u $in3,$x30,$inp |
| le?vperm $in1,$in1,$in1,$inpperm |
| lvx_u $in4,$x40,$inp |
| le?vperm $in2,$in2,$in2,$inpperm |
| vxor $out0,$in0,$rndkey0 |
| lvx_u $in5,$x50,$inp |
| le?vperm $in3,$in3,$in3,$inpperm |
| vxor $out1,$in1,$rndkey0 |
| lvx_u $in6,$x60,$inp |
| le?vperm $in4,$in4,$in4,$inpperm |
| vxor $out2,$in2,$rndkey0 |
| lvx_u $in7,$x70,$inp |
| addi $inp,$inp,0x80 |
| le?vperm $in5,$in5,$in5,$inpperm |
| vxor $out3,$in3,$rndkey0 |
| le?vperm $in6,$in6,$in6,$inpperm |
| vxor $out4,$in4,$rndkey0 |
| le?vperm $in7,$in7,$in7,$inpperm |
| vxor $out5,$in5,$rndkey0 |
| vxor $out6,$in6,$rndkey0 |
| vxor $out7,$in7,$rndkey0 |
| |
| mtctr $rounds |
| b Loop_cbc_dec8x |
| .align 5 |
| Loop_cbc_dec8x: |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| vncipher $out6,$out6,v24 |
| vncipher $out7,$out7,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| vncipher $out6,$out6,v25 |
| vncipher $out7,$out7,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_cbc_dec8x |
| |
| subic $len,$len,128 # $len-=128 |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| vncipher $out6,$out6,v24 |
| vncipher $out7,$out7,v24 |
| |
| subfe. r0,r0,r0 # borrow?-1:0 |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| vncipher $out6,$out6,v25 |
| vncipher $out7,$out7,v25 |
| |
| and r0,r0,$len |
| vncipher $out0,$out0,v26 |
| vncipher $out1,$out1,v26 |
| vncipher $out2,$out2,v26 |
| vncipher $out3,$out3,v26 |
| vncipher $out4,$out4,v26 |
| vncipher $out5,$out5,v26 |
| vncipher $out6,$out6,v26 |
| vncipher $out7,$out7,v26 |
| |
| add $inp,$inp,r0 # $inp is adjusted in such |
| # way that at exit from the |
| # loop inX-in7 are loaded |
| # with last "words" |
| vncipher $out0,$out0,v27 |
| vncipher $out1,$out1,v27 |
| vncipher $out2,$out2,v27 |
| vncipher $out3,$out3,v27 |
| vncipher $out4,$out4,v27 |
| vncipher $out5,$out5,v27 |
| vncipher $out6,$out6,v27 |
| vncipher $out7,$out7,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vncipher $out0,$out0,v28 |
| vncipher $out1,$out1,v28 |
| vncipher $out2,$out2,v28 |
| vncipher $out3,$out3,v28 |
| vncipher $out4,$out4,v28 |
| vncipher $out5,$out5,v28 |
| vncipher $out6,$out6,v28 |
| vncipher $out7,$out7,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| |
| vncipher $out0,$out0,v29 |
| vncipher $out1,$out1,v29 |
| vncipher $out2,$out2,v29 |
| vncipher $out3,$out3,v29 |
| vncipher $out4,$out4,v29 |
| vncipher $out5,$out5,v29 |
| vncipher $out6,$out6,v29 |
| vncipher $out7,$out7,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| |
| vncipher $out0,$out0,v30 |
| vxor $ivec,$ivec,v31 # xor with last round key |
| vncipher $out1,$out1,v30 |
| vxor $in0,$in0,v31 |
| vncipher $out2,$out2,v30 |
| vxor $in1,$in1,v31 |
| vncipher $out3,$out3,v30 |
| vxor $in2,$in2,v31 |
| vncipher $out4,$out4,v30 |
| vxor $in3,$in3,v31 |
| vncipher $out5,$out5,v30 |
| vxor $in4,$in4,v31 |
| vncipher $out6,$out6,v30 |
| vxor $in5,$in5,v31 |
| vncipher $out7,$out7,v30 |
| vxor $in6,$in6,v31 |
| |
| vncipherlast $out0,$out0,$ivec |
| vncipherlast $out1,$out1,$in0 |
| lvx_u $in0,$x00,$inp # load next input block |
| vncipherlast $out2,$out2,$in1 |
| lvx_u $in1,$x10,$inp |
| vncipherlast $out3,$out3,$in2 |
| le?vperm $in0,$in0,$in0,$inpperm |
| lvx_u $in2,$x20,$inp |
| vncipherlast $out4,$out4,$in3 |
| le?vperm $in1,$in1,$in1,$inpperm |
| lvx_u $in3,$x30,$inp |
| vncipherlast $out5,$out5,$in4 |
| le?vperm $in2,$in2,$in2,$inpperm |
| lvx_u $in4,$x40,$inp |
| vncipherlast $out6,$out6,$in5 |
| le?vperm $in3,$in3,$in3,$inpperm |
| lvx_u $in5,$x50,$inp |
| vncipherlast $out7,$out7,$in6 |
| le?vperm $in4,$in4,$in4,$inpperm |
| lvx_u $in6,$x60,$inp |
| vmr $ivec,$in7 |
| le?vperm $in5,$in5,$in5,$inpperm |
| lvx_u $in7,$x70,$inp |
| addi $inp,$inp,0x80 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $in6,$in6,$in6,$inpperm |
| vxor $out0,$in0,$rndkey0 |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $in7,$in7,$in7,$inpperm |
| vxor $out1,$in1,$rndkey0 |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| vxor $out2,$in2,$rndkey0 |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x30,$out |
| vxor $out3,$in3,$rndkey0 |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x40,$out |
| vxor $out4,$in4,$rndkey0 |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x50,$out |
| vxor $out5,$in5,$rndkey0 |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x60,$out |
| vxor $out6,$in6,$rndkey0 |
| stvx_u $out7,$x70,$out |
| addi $out,$out,0x80 |
| vxor $out7,$in7,$rndkey0 |
| |
| mtctr $rounds |
| beq Loop_cbc_dec8x # did $len-=128 borrow? |
| |
| addic. $len,$len,128 |
| beq Lcbc_dec8x_done |
| nop |
| nop |
| |
| Loop_cbc_dec8x_tail: # up to 7 "words" tail... |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| vncipher $out6,$out6,v24 |
| vncipher $out7,$out7,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| vncipher $out6,$out6,v25 |
| vncipher $out7,$out7,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_cbc_dec8x_tail |
| |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| vncipher $out6,$out6,v24 |
| vncipher $out7,$out7,v24 |
| |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| vncipher $out6,$out6,v25 |
| vncipher $out7,$out7,v25 |
| |
| vncipher $out1,$out1,v26 |
| vncipher $out2,$out2,v26 |
| vncipher $out3,$out3,v26 |
| vncipher $out4,$out4,v26 |
| vncipher $out5,$out5,v26 |
| vncipher $out6,$out6,v26 |
| vncipher $out7,$out7,v26 |
| |
| vncipher $out1,$out1,v27 |
| vncipher $out2,$out2,v27 |
| vncipher $out3,$out3,v27 |
| vncipher $out4,$out4,v27 |
| vncipher $out5,$out5,v27 |
| vncipher $out6,$out6,v27 |
| vncipher $out7,$out7,v27 |
| |
| vncipher $out1,$out1,v28 |
| vncipher $out2,$out2,v28 |
| vncipher $out3,$out3,v28 |
| vncipher $out4,$out4,v28 |
| vncipher $out5,$out5,v28 |
| vncipher $out6,$out6,v28 |
| vncipher $out7,$out7,v28 |
| |
| vncipher $out1,$out1,v29 |
| vncipher $out2,$out2,v29 |
| vncipher $out3,$out3,v29 |
| vncipher $out4,$out4,v29 |
| vncipher $out5,$out5,v29 |
| vncipher $out6,$out6,v29 |
| vncipher $out7,$out7,v29 |
| |
| vncipher $out1,$out1,v30 |
| vxor $ivec,$ivec,v31 # last round key |
| vncipher $out2,$out2,v30 |
| vxor $in1,$in1,v31 |
| vncipher $out3,$out3,v30 |
| vxor $in2,$in2,v31 |
| vncipher $out4,$out4,v30 |
| vxor $in3,$in3,v31 |
| vncipher $out5,$out5,v30 |
| vxor $in4,$in4,v31 |
| vncipher $out6,$out6,v30 |
| vxor $in5,$in5,v31 |
| vncipher $out7,$out7,v30 |
| vxor $in6,$in6,v31 |
| |
| cmplwi $len,32 # switch($len) |
| blt Lcbc_dec8x_one |
| nop |
| beq Lcbc_dec8x_two |
| cmplwi $len,64 |
| blt Lcbc_dec8x_three |
| nop |
| beq Lcbc_dec8x_four |
| cmplwi $len,96 |
| blt Lcbc_dec8x_five |
| nop |
| beq Lcbc_dec8x_six |
| |
| Lcbc_dec8x_seven: |
| vncipherlast $out1,$out1,$ivec |
| vncipherlast $out2,$out2,$in1 |
| vncipherlast $out3,$out3,$in2 |
| vncipherlast $out4,$out4,$in3 |
| vncipherlast $out5,$out5,$in4 |
| vncipherlast $out6,$out6,$in5 |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out1,$out1,$out1,$inpperm |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x00,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x10,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x20,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x30,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x40,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x50,$out |
| stvx_u $out7,$x60,$out |
| addi $out,$out,0x70 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_six: |
| vncipherlast $out2,$out2,$ivec |
| vncipherlast $out3,$out3,$in2 |
| vncipherlast $out4,$out4,$in3 |
| vncipherlast $out5,$out5,$in4 |
| vncipherlast $out6,$out6,$in5 |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out2,$out2,$out2,$inpperm |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x00,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x10,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x20,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x30,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x40,$out |
| stvx_u $out7,$x50,$out |
| addi $out,$out,0x60 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_five: |
| vncipherlast $out3,$out3,$ivec |
| vncipherlast $out4,$out4,$in3 |
| vncipherlast $out5,$out5,$in4 |
| vncipherlast $out6,$out6,$in5 |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out3,$out3,$out3,$inpperm |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x00,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x10,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x20,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x30,$out |
| stvx_u $out7,$x40,$out |
| addi $out,$out,0x50 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_four: |
| vncipherlast $out4,$out4,$ivec |
| vncipherlast $out5,$out5,$in4 |
| vncipherlast $out6,$out6,$in5 |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out4,$out4,$out4,$inpperm |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x00,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x10,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x20,$out |
| stvx_u $out7,$x30,$out |
| addi $out,$out,0x40 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_three: |
| vncipherlast $out5,$out5,$ivec |
| vncipherlast $out6,$out6,$in5 |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out5,$out5,$out5,$inpperm |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x00,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x10,$out |
| stvx_u $out7,$x20,$out |
| addi $out,$out,0x30 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_two: |
| vncipherlast $out6,$out6,$ivec |
| vncipherlast $out7,$out7,$in6 |
| vmr $ivec,$in7 |
| |
| le?vperm $out6,$out6,$out6,$inpperm |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x00,$out |
| stvx_u $out7,$x10,$out |
| addi $out,$out,0x20 |
| b Lcbc_dec8x_done |
| |
| .align 5 |
| Lcbc_dec8x_one: |
| vncipherlast $out7,$out7,$ivec |
| vmr $ivec,$in7 |
| |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out7,0,$out |
| addi $out,$out,0x10 |
| |
| Lcbc_dec8x_done: |
| le?vperm $ivec,$ivec,$ivec,$inpperm |
| stvx_u $ivec,0,$ivp # write [unaligned] iv |
| |
| li r10,`$FRAME+15` |
| li r11,`$FRAME+31` |
| stvx $inpperm,r10,$sp # wipe copies of round keys |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| |
| mtspr 256,$vrsave |
| lvx v20,r10,$sp # ABI says so |
| 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 |
| $POP r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| $POP r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| $POP r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| $POP r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| $POP r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| $POP r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| addi $sp,$sp,`$FRAME+21*16+6*$SIZE_T` |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0x80,6,6,0 |
| .long 0 |
| .size .${prefix}_cbc_encrypt,.-.${prefix}_cbc_encrypt |
| ___ |
| }} }}} |
| |
| ######################################################################### |
| {{{ # CTR procedure[s] # |
| |
| ####################### WARNING: Here be dragons! ####################### |
| # |
| # This code is written as 'ctr32', based on a 32-bit counter used |
| # upstream. The kernel does *not* use a 32-bit counter. The kernel uses |
| # a 128-bit counter. |
| # |
| # This leads to subtle changes from the upstream code: the counter |
| # is incremented with vaddu_q_m rather than vaddu_w_m. This occurs in |
| # both the bulk (8 blocks at a time) path, and in the individual block |
| # path. Be aware of this when doing updates. |
| # |
| # See: |
| # 1d4aa0b4c181 ("crypto: vmx - Fixing AES-CTR counter bug") |
| # 009b30ac7444 ("crypto: vmx - CTR: always increment IV as quadword") |
| # https://github.com/openssl/openssl/pull/8942 |
| # |
| ######################################################################### |
| my ($inp,$out,$len,$key,$ivp,$x10,$rounds,$idx)=map("r$_",(3..10)); |
| my ($rndkey0,$rndkey1,$inout,$tmp)= map("v$_",(0..3)); |
| my ($ivec,$inptail,$inpperm,$outhead,$outperm,$outmask,$keyperm,$one)= |
| map("v$_",(4..11)); |
| my $dat=$tmp; |
| |
| $code.=<<___; |
| .globl .${prefix}_ctr32_encrypt_blocks |
| ${UCMP}i $len,1 |
| bltlr- |
| |
| lis r0,0xfff0 |
| mfspr $vrsave,256 |
| mtspr 256,r0 |
| |
| li $idx,15 |
| vxor $rndkey0,$rndkey0,$rndkey0 |
| le?vspltisb $tmp,0x0f |
| |
| lvx $ivec,0,$ivp # load [unaligned] iv |
| lvsl $inpperm,0,$ivp |
| lvx $inptail,$idx,$ivp |
| vspltisb $one,1 |
| le?vxor $inpperm,$inpperm,$tmp |
| vperm $ivec,$ivec,$inptail,$inpperm |
| vsldoi $one,$rndkey0,$one,1 |
| |
| neg r11,$inp |
| ?lvsl $keyperm,0,$key # prepare for unaligned key |
| lwz $rounds,240($key) |
| |
| lvsr $inpperm,0,r11 # prepare for unaligned load |
| lvx $inptail,0,$inp |
| addi $inp,$inp,15 # 15 is not typo |
| le?vxor $inpperm,$inpperm,$tmp |
| |
| srwi $rounds,$rounds,1 |
| li $idx,16 |
| subi $rounds,$rounds,1 |
| |
| ${UCMP}i $len,8 |
| bge _aesp8_ctr32_encrypt8x |
| |
| ?lvsr $outperm,0,$out # prepare for unaligned store |
| vspltisb $outmask,-1 |
| lvx $outhead,0,$out |
| ?vperm $outmask,$rndkey0,$outmask,$outperm |
| le?vxor $outperm,$outperm,$tmp |
| |
| lvx $rndkey0,0,$key |
| mtctr $rounds |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$ivec,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| b Loop_ctr32_enc |
| |
| .align 5 |
| Loop_ctr32_enc: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| bdnz Loop_ctr32_enc |
| |
| vadduqm $ivec,$ivec,$one # Kernel change for 128-bit |
| vmr $dat,$inptail |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| subic. $len,$len,1 # blocks-- |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key |
| vperm $dat,$dat,$inptail,$inpperm |
| li $idx,16 |
| ?vperm $rndkey1,$rndkey0,$rndkey1,$keyperm |
| lvx $rndkey0,0,$key |
| vxor $dat,$dat,$rndkey1 # last round key |
| vcipherlast $inout,$inout,$dat |
| |
| lvx $rndkey1,$idx,$key |
| addi $idx,$idx,16 |
| vperm $inout,$inout,$inout,$outperm |
| vsel $dat,$outhead,$inout,$outmask |
| mtctr $rounds |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vmr $outhead,$inout |
| vxor $inout,$ivec,$rndkey0 |
| lvx $rndkey0,$idx,$key |
| addi $idx,$idx,16 |
| stvx $dat,0,$out |
| addi $out,$out,16 |
| bne Loop_ctr32_enc |
| |
| addi $out,$out,-1 |
| lvx $inout,0,$out # redundant in aligned case |
| vsel $inout,$outhead,$inout,$outmask |
| stvx $inout,0,$out |
| |
| mtspr 256,$vrsave |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,6,0 |
| .long 0 |
| ___ |
| ######################################################################### |
| {{ # Optimized CTR procedure # |
| my $key_="r11"; |
| my ($x00,$x10,$x20,$x30,$x40,$x50,$x60,$x70)=map("r$_",(0,8,26..31)); |
| my ($in0, $in1, $in2, $in3, $in4, $in5, $in6, $in7 )=map("v$_",(0..3,10,12..14)); |
| my ($out0,$out1,$out2,$out3,$out4,$out5,$out6,$out7)=map("v$_",(15..22)); |
| my $rndkey0="v23"; # v24-v25 rotating buffer for first found keys |
| # v26-v31 last 6 round keys |
| my ($tmp,$keyperm)=($in3,$in4); # aliases with "caller", redundant assignment |
| my ($two,$three,$four)=($outhead,$outperm,$outmask); |
| |
| $code.=<<___; |
| .align 5 |
| _aesp8_ctr32_encrypt8x: |
| $STU $sp,-`($FRAME+21*16+6*$SIZE_T)`($sp) |
| li r10,`$FRAME+8*16+15` |
| li r11,`$FRAME+8*16+31` |
| stvx v20,r10,$sp # ABI says so |
| addi r10,r10,32 |
| stvx v21,r11,$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,$sp |
| stvx v31,r11,$sp |
| li r0,-1 |
| stw $vrsave,`$FRAME+21*16-4`($sp) # save vrsave |
| li $x10,0x10 |
| $PUSH r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| li $x20,0x20 |
| $PUSH r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| li $x30,0x30 |
| $PUSH r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| li $x40,0x40 |
| $PUSH r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| li $x50,0x50 |
| $PUSH r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| li $x60,0x60 |
| $PUSH r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| li $x70,0x70 |
| mtspr 256,r0 |
| |
| subi $rounds,$rounds,3 # -4 in total |
| |
| lvx $rndkey0,$x00,$key # load key schedule |
| lvx v30,$x10,$key |
| addi $key,$key,0x20 |
| lvx v31,$x00,$key |
| ?vperm $rndkey0,$rndkey0,v30,$keyperm |
| addi $key_,$sp,$FRAME+15 |
| mtctr $rounds |
| |
| Load_ctr32_enc_key: |
| ?vperm v24,v30,v31,$keyperm |
| lvx v30,$x10,$key |
| addi $key,$key,0x20 |
| stvx v24,$x00,$key_ # off-load round[1] |
| ?vperm v25,v31,v30,$keyperm |
| lvx v31,$x00,$key |
| stvx v25,$x10,$key_ # off-load round[2] |
| addi $key_,$key_,0x20 |
| bdnz Load_ctr32_enc_key |
| |
| lvx v26,$x10,$key |
| ?vperm v24,v30,v31,$keyperm |
| lvx v27,$x20,$key |
| stvx v24,$x00,$key_ # off-load round[3] |
| ?vperm v25,v31,v26,$keyperm |
| lvx v28,$x30,$key |
| stvx v25,$x10,$key_ # off-load round[4] |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| ?vperm v26,v26,v27,$keyperm |
| lvx v29,$x40,$key |
| ?vperm v27,v27,v28,$keyperm |
| lvx v30,$x50,$key |
| ?vperm v28,v28,v29,$keyperm |
| lvx v31,$x60,$key |
| ?vperm v29,v29,v30,$keyperm |
| lvx $out0,$x70,$key # borrow $out0 |
| ?vperm v30,v30,v31,$keyperm |
| lvx v24,$x00,$key_ # pre-load round[1] |
| ?vperm v31,v31,$out0,$keyperm |
| lvx v25,$x10,$key_ # pre-load round[2] |
| |
| vadduqm $two,$one,$one |
| subi $inp,$inp,15 # undo "caller" |
| $SHL $len,$len,4 |
| |
| vadduqm $out1,$ivec,$one # counter values ... |
| vadduqm $out2,$ivec,$two # (do all ctr adds as 128-bit) |
| vxor $out0,$ivec,$rndkey0 # ... xored with rndkey[0] |
| le?li $idx,8 |
| vadduqm $out3,$out1,$two |
| vxor $out1,$out1,$rndkey0 |
| le?lvsl $inpperm,0,$idx |
| vadduqm $out4,$out2,$two |
| vxor $out2,$out2,$rndkey0 |
| le?vspltisb $tmp,0x0f |
| vadduqm $out5,$out3,$two |
| vxor $out3,$out3,$rndkey0 |
| le?vxor $inpperm,$inpperm,$tmp # transform for lvx_u/stvx_u |
| vadduqm $out6,$out4,$two |
| vxor $out4,$out4,$rndkey0 |
| vadduqm $out7,$out5,$two |
| vxor $out5,$out5,$rndkey0 |
| vadduqm $ivec,$out6,$two # next counter value |
| vxor $out6,$out6,$rndkey0 |
| vxor $out7,$out7,$rndkey0 |
| |
| mtctr $rounds |
| b Loop_ctr32_enc8x |
| .align 5 |
| Loop_ctr32_enc8x: |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vcipher $out4,$out4,v24 |
| vcipher $out5,$out5,v24 |
| vcipher $out6,$out6,v24 |
| vcipher $out7,$out7,v24 |
| Loop_ctr32_enc8x_middle: |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vcipher $out4,$out4,v25 |
| vcipher $out5,$out5,v25 |
| vcipher $out6,$out6,v25 |
| vcipher $out7,$out7,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_ctr32_enc8x |
| |
| subic r11,$len,256 # $len-256, borrow $key_ |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vcipher $out4,$out4,v24 |
| vcipher $out5,$out5,v24 |
| vcipher $out6,$out6,v24 |
| vcipher $out7,$out7,v24 |
| |
| subfe r0,r0,r0 # borrow?-1:0 |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vcipher $out4,$out4,v25 |
| vcipher $out5,$out5,v25 |
| vcipher $out6,$out6,v25 |
| vcipher $out7,$out7,v25 |
| |
| and r0,r0,r11 |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vcipher $out0,$out0,v26 |
| vcipher $out1,$out1,v26 |
| vcipher $out2,$out2,v26 |
| vcipher $out3,$out3,v26 |
| vcipher $out4,$out4,v26 |
| vcipher $out5,$out5,v26 |
| vcipher $out6,$out6,v26 |
| vcipher $out7,$out7,v26 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| |
| subic $len,$len,129 # $len-=129 |
| vcipher $out0,$out0,v27 |
| addi $len,$len,1 # $len-=128 really |
| vcipher $out1,$out1,v27 |
| vcipher $out2,$out2,v27 |
| vcipher $out3,$out3,v27 |
| vcipher $out4,$out4,v27 |
| vcipher $out5,$out5,v27 |
| vcipher $out6,$out6,v27 |
| vcipher $out7,$out7,v27 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| |
| vcipher $out0,$out0,v28 |
| lvx_u $in0,$x00,$inp # load input |
| vcipher $out1,$out1,v28 |
| lvx_u $in1,$x10,$inp |
| vcipher $out2,$out2,v28 |
| lvx_u $in2,$x20,$inp |
| vcipher $out3,$out3,v28 |
| lvx_u $in3,$x30,$inp |
| vcipher $out4,$out4,v28 |
| lvx_u $in4,$x40,$inp |
| vcipher $out5,$out5,v28 |
| lvx_u $in5,$x50,$inp |
| vcipher $out6,$out6,v28 |
| lvx_u $in6,$x60,$inp |
| vcipher $out7,$out7,v28 |
| lvx_u $in7,$x70,$inp |
| addi $inp,$inp,0x80 |
| |
| vcipher $out0,$out0,v29 |
| le?vperm $in0,$in0,$in0,$inpperm |
| vcipher $out1,$out1,v29 |
| le?vperm $in1,$in1,$in1,$inpperm |
| vcipher $out2,$out2,v29 |
| le?vperm $in2,$in2,$in2,$inpperm |
| vcipher $out3,$out3,v29 |
| le?vperm $in3,$in3,$in3,$inpperm |
| vcipher $out4,$out4,v29 |
| le?vperm $in4,$in4,$in4,$inpperm |
| vcipher $out5,$out5,v29 |
| le?vperm $in5,$in5,$in5,$inpperm |
| vcipher $out6,$out6,v29 |
| le?vperm $in6,$in6,$in6,$inpperm |
| vcipher $out7,$out7,v29 |
| le?vperm $in7,$in7,$in7,$inpperm |
| |
| add $inp,$inp,r0 # $inp is adjusted in such |
| # way that at exit from the |
| # loop inX-in7 are loaded |
| # with last "words" |
| subfe. r0,r0,r0 # borrow?-1:0 |
| vcipher $out0,$out0,v30 |
| vxor $in0,$in0,v31 # xor with last round key |
| vcipher $out1,$out1,v30 |
| vxor $in1,$in1,v31 |
| vcipher $out2,$out2,v30 |
| vxor $in2,$in2,v31 |
| vcipher $out3,$out3,v30 |
| vxor $in3,$in3,v31 |
| vcipher $out4,$out4,v30 |
| vxor $in4,$in4,v31 |
| vcipher $out5,$out5,v30 |
| vxor $in5,$in5,v31 |
| vcipher $out6,$out6,v30 |
| vxor $in6,$in6,v31 |
| vcipher $out7,$out7,v30 |
| vxor $in7,$in7,v31 |
| |
| bne Lctr32_enc8x_break # did $len-129 borrow? |
| |
| vcipherlast $in0,$out0,$in0 |
| vcipherlast $in1,$out1,$in1 |
| vadduqm $out1,$ivec,$one # counter values ... |
| vcipherlast $in2,$out2,$in2 |
| vadduqm $out2,$ivec,$two |
| vxor $out0,$ivec,$rndkey0 # ... xored with rndkey[0] |
| vcipherlast $in3,$out3,$in3 |
| vadduqm $out3,$out1,$two |
| vxor $out1,$out1,$rndkey0 |
| vcipherlast $in4,$out4,$in4 |
| vadduqm $out4,$out2,$two |
| vxor $out2,$out2,$rndkey0 |
| vcipherlast $in5,$out5,$in5 |
| vadduqm $out5,$out3,$two |
| vxor $out3,$out3,$rndkey0 |
| vcipherlast $in6,$out6,$in6 |
| vadduqm $out6,$out4,$two |
| vxor $out4,$out4,$rndkey0 |
| vcipherlast $in7,$out7,$in7 |
| vadduqm $out7,$out5,$two |
| vxor $out5,$out5,$rndkey0 |
| le?vperm $in0,$in0,$in0,$inpperm |
| vadduqm $ivec,$out6,$two # next counter value |
| vxor $out6,$out6,$rndkey0 |
| le?vperm $in1,$in1,$in1,$inpperm |
| vxor $out7,$out7,$rndkey0 |
| mtctr $rounds |
| |
| vcipher $out0,$out0,v24 |
| stvx_u $in0,$x00,$out |
| le?vperm $in2,$in2,$in2,$inpperm |
| vcipher $out1,$out1,v24 |
| stvx_u $in1,$x10,$out |
| le?vperm $in3,$in3,$in3,$inpperm |
| vcipher $out2,$out2,v24 |
| stvx_u $in2,$x20,$out |
| le?vperm $in4,$in4,$in4,$inpperm |
| vcipher $out3,$out3,v24 |
| stvx_u $in3,$x30,$out |
| le?vperm $in5,$in5,$in5,$inpperm |
| vcipher $out4,$out4,v24 |
| stvx_u $in4,$x40,$out |
| le?vperm $in6,$in6,$in6,$inpperm |
| vcipher $out5,$out5,v24 |
| stvx_u $in5,$x50,$out |
| le?vperm $in7,$in7,$in7,$inpperm |
| vcipher $out6,$out6,v24 |
| stvx_u $in6,$x60,$out |
| vcipher $out7,$out7,v24 |
| stvx_u $in7,$x70,$out |
| addi $out,$out,0x80 |
| |
| b Loop_ctr32_enc8x_middle |
| |
| .align 5 |
| Lctr32_enc8x_break: |
| cmpwi $len,-0x60 |
| blt Lctr32_enc8x_one |
| nop |
| beq Lctr32_enc8x_two |
| cmpwi $len,-0x40 |
| blt Lctr32_enc8x_three |
| nop |
| beq Lctr32_enc8x_four |
| cmpwi $len,-0x20 |
| blt Lctr32_enc8x_five |
| nop |
| beq Lctr32_enc8x_six |
| cmpwi $len,0x00 |
| blt Lctr32_enc8x_seven |
| |
| Lctr32_enc8x_eight: |
| vcipherlast $out0,$out0,$in0 |
| vcipherlast $out1,$out1,$in1 |
| vcipherlast $out2,$out2,$in2 |
| vcipherlast $out3,$out3,$in3 |
| vcipherlast $out4,$out4,$in4 |
| vcipherlast $out5,$out5,$in5 |
| vcipherlast $out6,$out6,$in6 |
| vcipherlast $out7,$out7,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x30,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x40,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x50,$out |
| le?vperm $out7,$out7,$out7,$inpperm |
| stvx_u $out6,$x60,$out |
| stvx_u $out7,$x70,$out |
| addi $out,$out,0x80 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_seven: |
| vcipherlast $out0,$out0,$in1 |
| vcipherlast $out1,$out1,$in2 |
| vcipherlast $out2,$out2,$in3 |
| vcipherlast $out3,$out3,$in4 |
| vcipherlast $out4,$out4,$in5 |
| vcipherlast $out5,$out5,$in6 |
| vcipherlast $out6,$out6,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x30,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x40,$out |
| le?vperm $out6,$out6,$out6,$inpperm |
| stvx_u $out5,$x50,$out |
| stvx_u $out6,$x60,$out |
| addi $out,$out,0x70 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_six: |
| vcipherlast $out0,$out0,$in2 |
| vcipherlast $out1,$out1,$in3 |
| vcipherlast $out2,$out2,$in4 |
| vcipherlast $out3,$out3,$in5 |
| vcipherlast $out4,$out4,$in6 |
| vcipherlast $out5,$out5,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x30,$out |
| le?vperm $out5,$out5,$out5,$inpperm |
| stvx_u $out4,$x40,$out |
| stvx_u $out5,$x50,$out |
| addi $out,$out,0x60 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_five: |
| vcipherlast $out0,$out0,$in3 |
| vcipherlast $out1,$out1,$in4 |
| vcipherlast $out2,$out2,$in5 |
| vcipherlast $out3,$out3,$in6 |
| vcipherlast $out4,$out4,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| le?vperm $out4,$out4,$out4,$inpperm |
| stvx_u $out3,$x30,$out |
| stvx_u $out4,$x40,$out |
| addi $out,$out,0x50 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_four: |
| vcipherlast $out0,$out0,$in4 |
| vcipherlast $out1,$out1,$in5 |
| vcipherlast $out2,$out2,$in6 |
| vcipherlast $out3,$out3,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$inpperm |
| stvx_u $out2,$x20,$out |
| stvx_u $out3,$x30,$out |
| addi $out,$out,0x40 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_three: |
| vcipherlast $out0,$out0,$in5 |
| vcipherlast $out1,$out1,$in6 |
| vcipherlast $out2,$out2,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| le?vperm $out2,$out2,$out2,$inpperm |
| stvx_u $out1,$x10,$out |
| stvx_u $out2,$x20,$out |
| addi $out,$out,0x30 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_two: |
| vcipherlast $out0,$out0,$in6 |
| vcipherlast $out1,$out1,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| le?vperm $out1,$out1,$out1,$inpperm |
| stvx_u $out0,$x00,$out |
| stvx_u $out1,$x10,$out |
| addi $out,$out,0x20 |
| b Lctr32_enc8x_done |
| |
| .align 5 |
| Lctr32_enc8x_one: |
| vcipherlast $out0,$out0,$in7 |
| |
| le?vperm $out0,$out0,$out0,$inpperm |
| stvx_u $out0,0,$out |
| addi $out,$out,0x10 |
| |
| Lctr32_enc8x_done: |
| li r10,`$FRAME+15` |
| li r11,`$FRAME+31` |
| stvx $inpperm,r10,$sp # wipe copies of round keys |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| stvx $inpperm,r10,$sp |
| addi r10,r10,32 |
| stvx $inpperm,r11,$sp |
| addi r11,r11,32 |
| |
| mtspr 256,$vrsave |
| lvx v20,r10,$sp # ABI says so |
| 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 |
| $POP r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| $POP r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| $POP r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| $POP r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| $POP r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| $POP r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| addi $sp,$sp,`$FRAME+21*16+6*$SIZE_T` |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0x80,6,6,0 |
| .long 0 |
| .size .${prefix}_ctr32_encrypt_blocks,.-.${prefix}_ctr32_encrypt_blocks |
| ___ |
| }} }}} |
| |
| ######################################################################### |
| {{{ # XTS procedures # |
| # int aes_p8_xts_[en|de]crypt(const char *inp, char *out, size_t len, # |
| # const AES_KEY *key1, const AES_KEY *key2, # |
| # [const] unsigned char iv[16]); # |
| # If $key2 is NULL, then a "tweak chaining" mode is engaged, in which # |
| # input tweak value is assumed to be encrypted already, and last tweak # |
| # value, one suitable for consecutive call on same chunk of data, is # |
| # written back to original buffer. In addition, in "tweak chaining" # |
| # mode only complete input blocks are processed. # |
| |
| my ($inp,$out,$len,$key1,$key2,$ivp,$rounds,$idx) = map("r$_",(3..10)); |
| my ($rndkey0,$rndkey1,$inout) = map("v$_",(0..2)); |
| my ($output,$inptail,$inpperm,$leperm,$keyperm) = map("v$_",(3..7)); |
| my ($tweak,$seven,$eighty7,$tmp,$tweak1) = map("v$_",(8..12)); |
| my $taillen = $key2; |
| |
| ($inp,$idx) = ($idx,$inp); # reassign |
| |
| $code.=<<___; |
| .globl .${prefix}_xts_encrypt |
| mr $inp,r3 # reassign |
| li r3,-1 |
| ${UCMP}i $len,16 |
| bltlr- |
| |
| lis r0,0xfff0 |
| mfspr r12,256 # save vrsave |
| li r11,0 |
| mtspr 256,r0 |
| |
| vspltisb $seven,0x07 # 0x070707..07 |
| le?lvsl $leperm,r11,r11 |
| le?vspltisb $tmp,0x0f |
| le?vxor $leperm,$leperm,$seven |
| |
| li $idx,15 |
| lvx $tweak,0,$ivp # load [unaligned] iv |
| lvsl $inpperm,0,$ivp |
| lvx $inptail,$idx,$ivp |
| le?vxor $inpperm,$inpperm,$tmp |
| vperm $tweak,$tweak,$inptail,$inpperm |
| |
| neg r11,$inp |
| lvsr $inpperm,0,r11 # prepare for unaligned load |
| lvx $inout,0,$inp |
| addi $inp,$inp,15 # 15 is not typo |
| le?vxor $inpperm,$inpperm,$tmp |
| |
| ${UCMP}i $key2,0 # key2==NULL? |
| beq Lxts_enc_no_key2 |
| |
| ?lvsl $keyperm,0,$key2 # prepare for unaligned key |
| lwz $rounds,240($key2) |
| srwi $rounds,$rounds,1 |
| subi $rounds,$rounds,1 |
| li $idx,16 |
| |
| lvx $rndkey0,0,$key2 |
| lvx $rndkey1,$idx,$key2 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $tweak,$tweak,$rndkey0 |
| lvx $rndkey0,$idx,$key2 |
| addi $idx,$idx,16 |
| mtctr $rounds |
| |
| Ltweak_xts_enc: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $tweak,$tweak,$rndkey1 |
| lvx $rndkey1,$idx,$key2 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipher $tweak,$tweak,$rndkey0 |
| lvx $rndkey0,$idx,$key2 |
| addi $idx,$idx,16 |
| bdnz Ltweak_xts_enc |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $tweak,$tweak,$rndkey1 |
| lvx $rndkey1,$idx,$key2 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipherlast $tweak,$tweak,$rndkey0 |
| |
| li $ivp,0 # don't chain the tweak |
| b Lxts_enc |
| |
| Lxts_enc_no_key2: |
| li $idx,-16 |
| and $len,$len,$idx # in "tweak chaining" |
| # mode only complete |
| # blocks are processed |
| Lxts_enc: |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| |
| ?lvsl $keyperm,0,$key1 # prepare for unaligned key |
| lwz $rounds,240($key1) |
| srwi $rounds,$rounds,1 |
| subi $rounds,$rounds,1 |
| li $idx,16 |
| |
| vslb $eighty7,$seven,$seven # 0x808080..80 |
| vor $eighty7,$eighty7,$seven # 0x878787..87 |
| vspltisb $tmp,1 # 0x010101..01 |
| vsldoi $eighty7,$eighty7,$tmp,15 # 0x870101..01 |
| |
| ${UCMP}i $len,96 |
| bge _aesp8_xts_encrypt6x |
| |
| andi. $taillen,$len,15 |
| subic r0,$len,32 |
| subi $taillen,$taillen,16 |
| subfe r0,r0,r0 |
| and r0,r0,$taillen |
| add $inp,$inp,r0 |
| |
| lvx $rndkey0,0,$key1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| vperm $inout,$inout,$inptail,$inpperm |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$inout,$tweak |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| mtctr $rounds |
| b Loop_xts_enc |
| |
| .align 5 |
| Loop_xts_enc: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| bdnz Loop_xts_enc |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| li $idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $rndkey0,$rndkey0,$tweak |
| vcipherlast $output,$inout,$rndkey0 |
| |
| le?vperm $tmp,$output,$output,$leperm |
| be?nop |
| le?stvx_u $tmp,0,$out |
| be?stvx_u $output,0,$out |
| addi $out,$out,16 |
| |
| subic. $len,$len,16 |
| beq Lxts_enc_done |
| |
| vmr $inout,$inptail |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| lvx $rndkey0,0,$key1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| |
| subic r0,$len,32 |
| subfe r0,r0,r0 |
| and r0,r0,$taillen |
| add $inp,$inp,r0 |
| |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $tweak,$tweak,$tmp |
| |
| vperm $inout,$inout,$inptail,$inpperm |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$inout,$tweak |
| vxor $output,$output,$rndkey0 # just in case $len<16 |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| |
| mtctr $rounds |
| ${UCMP}i $len,16 |
| bge Loop_xts_enc |
| |
| vxor $output,$output,$tweak |
| lvsr $inpperm,0,$len # $inpperm is no longer needed |
| vxor $inptail,$inptail,$inptail # $inptail is no longer needed |
| vspltisb $tmp,-1 |
| vperm $inptail,$inptail,$tmp,$inpperm |
| vsel $inout,$inout,$output,$inptail |
| |
| subi r11,$out,17 |
| subi $out,$out,16 |
| mtctr $len |
| li $len,16 |
| Loop_xts_enc_steal: |
| lbzu r0,1(r11) |
| stb r0,16(r11) |
| bdnz Loop_xts_enc_steal |
| |
| mtctr $rounds |
| b Loop_xts_enc # one more time... |
| |
| Lxts_enc_done: |
| ${UCMP}i $ivp,0 |
| beq Lxts_enc_ret |
| |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $tweak,$tweak,$tmp |
| |
| le?vperm $tweak,$tweak,$tweak,$leperm |
| stvx_u $tweak,0,$ivp |
| |
| Lxts_enc_ret: |
| mtspr 256,r12 # restore vrsave |
| li r3,0 |
| blr |
| .long 0 |
| .byte 0,12,0x04,0,0x80,6,6,0 |
| .long 0 |
| .size .${prefix}_xts_encrypt,.-.${prefix}_xts_encrypt |
| |
| .globl .${prefix}_xts_decrypt |
| mr $inp,r3 # reassign |
| li r3,-1 |
| ${UCMP}i $len,16 |
| bltlr- |
| |
| lis r0,0xfff8 |
| mfspr r12,256 # save vrsave |
| li r11,0 |
| mtspr 256,r0 |
| |
| andi. r0,$len,15 |
| neg r0,r0 |
| andi. r0,r0,16 |
| sub $len,$len,r0 |
| |
| vspltisb $seven,0x07 # 0x070707..07 |
| le?lvsl $leperm,r11,r11 |
| le?vspltisb $tmp,0x0f |
| le?vxor $leperm,$leperm,$seven |
| |
| li $idx,15 |
| lvx $tweak,0,$ivp # load [unaligned] iv |
| lvsl $inpperm,0,$ivp |
| lvx $inptail,$idx,$ivp |
| le?vxor $inpperm,$inpperm,$tmp |
| vperm $tweak,$tweak,$inptail,$inpperm |
| |
| neg r11,$inp |
| lvsr $inpperm,0,r11 # prepare for unaligned load |
| lvx $inout,0,$inp |
| addi $inp,$inp,15 # 15 is not typo |
| le?vxor $inpperm,$inpperm,$tmp |
| |
| ${UCMP}i $key2,0 # key2==NULL? |
| beq Lxts_dec_no_key2 |
| |
| ?lvsl $keyperm,0,$key2 # prepare for unaligned key |
| lwz $rounds,240($key2) |
| srwi $rounds,$rounds,1 |
| subi $rounds,$rounds,1 |
| li $idx,16 |
| |
| lvx $rndkey0,0,$key2 |
| lvx $rndkey1,$idx,$key2 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $tweak,$tweak,$rndkey0 |
| lvx $rndkey0,$idx,$key2 |
| addi $idx,$idx,16 |
| mtctr $rounds |
| |
| Ltweak_xts_dec: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $tweak,$tweak,$rndkey1 |
| lvx $rndkey1,$idx,$key2 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipher $tweak,$tweak,$rndkey0 |
| lvx $rndkey0,$idx,$key2 |
| addi $idx,$idx,16 |
| bdnz Ltweak_xts_dec |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vcipher $tweak,$tweak,$rndkey1 |
| lvx $rndkey1,$idx,$key2 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vcipherlast $tweak,$tweak,$rndkey0 |
| |
| li $ivp,0 # don't chain the tweak |
| b Lxts_dec |
| |
| Lxts_dec_no_key2: |
| neg $idx,$len |
| andi. $idx,$idx,15 |
| add $len,$len,$idx # in "tweak chaining" |
| # mode only complete |
| # blocks are processed |
| Lxts_dec: |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| |
| ?lvsl $keyperm,0,$key1 # prepare for unaligned key |
| lwz $rounds,240($key1) |
| srwi $rounds,$rounds,1 |
| subi $rounds,$rounds,1 |
| li $idx,16 |
| |
| vslb $eighty7,$seven,$seven # 0x808080..80 |
| vor $eighty7,$eighty7,$seven # 0x878787..87 |
| vspltisb $tmp,1 # 0x010101..01 |
| vsldoi $eighty7,$eighty7,$tmp,15 # 0x870101..01 |
| |
| ${UCMP}i $len,96 |
| bge _aesp8_xts_decrypt6x |
| |
| lvx $rndkey0,0,$key1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| vperm $inout,$inout,$inptail,$inpperm |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$inout,$tweak |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| mtctr $rounds |
| |
| ${UCMP}i $len,16 |
| blt Ltail_xts_dec |
| be?b Loop_xts_dec |
| |
| .align 5 |
| Loop_xts_dec: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vncipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| bdnz Loop_xts_dec |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| li $idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $rndkey0,$rndkey0,$tweak |
| vncipherlast $output,$inout,$rndkey0 |
| |
| le?vperm $tmp,$output,$output,$leperm |
| be?nop |
| le?stvx_u $tmp,0,$out |
| be?stvx_u $output,0,$out |
| addi $out,$out,16 |
| |
| subic. $len,$len,16 |
| beq Lxts_dec_done |
| |
| vmr $inout,$inptail |
| lvx $inptail,0,$inp |
| addi $inp,$inp,16 |
| lvx $rndkey0,0,$key1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $tweak,$tweak,$tmp |
| |
| vperm $inout,$inout,$inptail,$inpperm |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $inout,$inout,$tweak |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| |
| mtctr $rounds |
| ${UCMP}i $len,16 |
| bge Loop_xts_dec |
| |
| Ltail_xts_dec: |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak1,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $tweak1,$tweak1,$tmp |
| |
| subi $inp,$inp,16 |
| add $inp,$inp,$len |
| |
| vxor $inout,$inout,$tweak # :-( |
| vxor $inout,$inout,$tweak1 # :-) |
| |
| Loop_xts_dec_short: |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vncipher $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| bdnz Loop_xts_dec_short |
| |
| ?vperm $rndkey1,$rndkey1,$rndkey0,$keyperm |
| vncipher $inout,$inout,$rndkey1 |
| lvx $rndkey1,$idx,$key1 |
| li $idx,16 |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| vxor $rndkey0,$rndkey0,$tweak1 |
| vncipherlast $output,$inout,$rndkey0 |
| |
| le?vperm $tmp,$output,$output,$leperm |
| be?nop |
| le?stvx_u $tmp,0,$out |
| be?stvx_u $output,0,$out |
| |
| vmr $inout,$inptail |
| lvx $inptail,0,$inp |
| #addi $inp,$inp,16 |
| lvx $rndkey0,0,$key1 |
| lvx $rndkey1,$idx,$key1 |
| addi $idx,$idx,16 |
| vperm $inout,$inout,$inptail,$inpperm |
| ?vperm $rndkey0,$rndkey0,$rndkey1,$keyperm |
| |
| lvsr $inpperm,0,$len # $inpperm is no longer needed |
| vxor $inptail,$inptail,$inptail # $inptail is no longer needed |
| vspltisb $tmp,-1 |
| vperm $inptail,$inptail,$tmp,$inpperm |
| vsel $inout,$inout,$output,$inptail |
| |
| vxor $rndkey0,$rndkey0,$tweak |
| vxor $inout,$inout,$rndkey0 |
| lvx $rndkey0,$idx,$key1 |
| addi $idx,$idx,16 |
| |
| subi r11,$out,1 |
| mtctr $len |
| li $len,16 |
| Loop_xts_dec_steal: |
| lbzu r0,1(r11) |
| stb r0,16(r11) |
| bdnz Loop_xts_dec_steal |
| |
| mtctr $rounds |
| b Loop_xts_dec # one more time... |
| |
| Lxts_dec_done: |
| ${UCMP}i $ivp,0 |
| beq Lxts_dec_ret |
| |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $tweak,$tweak,$tmp |
| |
| le?vperm $tweak,$tweak,$tweak,$leperm |
| stvx_u $tweak,0,$ivp |
| |
| Lxts_dec_ret: |
| mtspr 256,r12 # restore vrsave |
| li r3,0 |
| blr |
| .long 0 |
| .byte 0,12,0x04,0,0x80,6,6,0 |
| .long 0 |
| .size .${prefix}_xts_decrypt,.-.${prefix}_xts_decrypt |
| ___ |
| ######################################################################### |
| {{ # Optimized XTS procedures # |
| my $key_=$key2; |
| my ($x00,$x10,$x20,$x30,$x40,$x50,$x60,$x70)=map("r$_",(0,3,26..31)); |
| $x00=0 if ($flavour =~ /osx/); |
| my ($in0, $in1, $in2, $in3, $in4, $in5 )=map("v$_",(0..5)); |
| my ($out0, $out1, $out2, $out3, $out4, $out5)=map("v$_",(7,12..16)); |
| my ($twk0, $twk1, $twk2, $twk3, $twk4, $twk5)=map("v$_",(17..22)); |
| my $rndkey0="v23"; # v24-v25 rotating buffer for first found keys |
| # v26-v31 last 6 round keys |
| my ($keyperm)=($out0); # aliases with "caller", redundant assignment |
| my $taillen=$x70; |
| |
| $code.=<<___; |
| .align 5 |
| _aesp8_xts_encrypt6x: |
| $STU $sp,-`($FRAME+21*16+6*$SIZE_T)`($sp) |
| mflr r11 |
| li r7,`$FRAME+8*16+15` |
| li r3,`$FRAME+8*16+31` |
| $PUSH r11,`$FRAME+21*16+6*$SIZE_T+$LRSAVE`($sp) |
| stvx v20,r7,$sp # ABI says so |
| addi r7,r7,32 |
| stvx v21,r3,$sp |
| addi r3,r3,32 |
| stvx v22,r7,$sp |
| addi r7,r7,32 |
| stvx v23,r3,$sp |
| addi r3,r3,32 |
| stvx v24,r7,$sp |
| addi r7,r7,32 |
| stvx v25,r3,$sp |
| addi r3,r3,32 |
| stvx v26,r7,$sp |
| addi r7,r7,32 |
| stvx v27,r3,$sp |
| addi r3,r3,32 |
| stvx v28,r7,$sp |
| addi r7,r7,32 |
| stvx v29,r3,$sp |
| addi r3,r3,32 |
| stvx v30,r7,$sp |
| stvx v31,r3,$sp |
| li r0,-1 |
| stw $vrsave,`$FRAME+21*16-4`($sp) # save vrsave |
| li $x10,0x10 |
| $PUSH r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| li $x20,0x20 |
| $PUSH r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| li $x30,0x30 |
| $PUSH r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| li $x40,0x40 |
| $PUSH r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| li $x50,0x50 |
| $PUSH r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| li $x60,0x60 |
| $PUSH r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| li $x70,0x70 |
| mtspr 256,r0 |
| |
| subi $rounds,$rounds,3 # -4 in total |
| |
| lvx $rndkey0,$x00,$key1 # load key schedule |
| lvx v30,$x10,$key1 |
| addi $key1,$key1,0x20 |
| lvx v31,$x00,$key1 |
| ?vperm $rndkey0,$rndkey0,v30,$keyperm |
| addi $key_,$sp,$FRAME+15 |
| mtctr $rounds |
| |
| Load_xts_enc_key: |
| ?vperm v24,v30,v31,$keyperm |
| lvx v30,$x10,$key1 |
| addi $key1,$key1,0x20 |
| stvx v24,$x00,$key_ # off-load round[1] |
| ?vperm v25,v31,v30,$keyperm |
| lvx v31,$x00,$key1 |
| stvx v25,$x10,$key_ # off-load round[2] |
| addi $key_,$key_,0x20 |
| bdnz Load_xts_enc_key |
| |
| lvx v26,$x10,$key1 |
| ?vperm v24,v30,v31,$keyperm |
| lvx v27,$x20,$key1 |
| stvx v24,$x00,$key_ # off-load round[3] |
| ?vperm v25,v31,v26,$keyperm |
| lvx v28,$x30,$key1 |
| stvx v25,$x10,$key_ # off-load round[4] |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| ?vperm v26,v26,v27,$keyperm |
| lvx v29,$x40,$key1 |
| ?vperm v27,v27,v28,$keyperm |
| lvx v30,$x50,$key1 |
| ?vperm v28,v28,v29,$keyperm |
| lvx v31,$x60,$key1 |
| ?vperm v29,v29,v30,$keyperm |
| lvx $twk5,$x70,$key1 # borrow $twk5 |
| ?vperm v30,v30,v31,$keyperm |
| lvx v24,$x00,$key_ # pre-load round[1] |
| ?vperm v31,v31,$twk5,$keyperm |
| lvx v25,$x10,$key_ # pre-load round[2] |
| |
| vperm $in0,$inout,$inptail,$inpperm |
| subi $inp,$inp,31 # undo "caller" |
| vxor $twk0,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $out0,$in0,$twk0 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in1,$x10,$inp |
| vxor $twk1,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in1,$in1,$in1,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out1,$in1,$twk1 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in2,$x20,$inp |
| andi. $taillen,$len,15 |
| vxor $twk2,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in2,$in2,$in2,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out2,$in2,$twk2 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in3,$x30,$inp |
| sub $len,$len,$taillen |
| vxor $twk3,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in3,$in3,$in3,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out3,$in3,$twk3 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in4,$x40,$inp |
| subi $len,$len,0x60 |
| vxor $twk4,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in4,$in4,$in4,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out4,$in4,$twk4 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in5,$x50,$inp |
| addi $inp,$inp,0x60 |
| vxor $twk5,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in5,$in5,$in5,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out5,$in5,$twk5 |
| vxor $tweak,$tweak,$tmp |
| |
| vxor v31,v31,$rndkey0 |
| mtctr $rounds |
| b Loop_xts_enc6x |
| |
| .align 5 |
| Loop_xts_enc6x: |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vcipher $out4,$out4,v24 |
| vcipher $out5,$out5,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vcipher $out4,$out4,v25 |
| vcipher $out5,$out5,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_xts_enc6x |
| |
| subic $len,$len,96 # $len-=96 |
| vxor $in0,$twk0,v31 # xor with last round key |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk0,$tweak,$rndkey0 |
| vaddubm $tweak,$tweak,$tweak |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vsldoi $tmp,$tmp,$tmp,15 |
| vcipher $out4,$out4,v24 |
| vcipher $out5,$out5,v24 |
| |
| subfe. r0,r0,r0 # borrow?-1:0 |
| vand $tmp,$tmp,$eighty7 |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vxor $tweak,$tweak,$tmp |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vxor $in1,$twk1,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk1,$tweak,$rndkey0 |
| vcipher $out4,$out4,v25 |
| vcipher $out5,$out5,v25 |
| |
| and r0,r0,$len |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vcipher $out0,$out0,v26 |
| vcipher $out1,$out1,v26 |
| vand $tmp,$tmp,$eighty7 |
| vcipher $out2,$out2,v26 |
| vcipher $out3,$out3,v26 |
| vxor $tweak,$tweak,$tmp |
| vcipher $out4,$out4,v26 |
| vcipher $out5,$out5,v26 |
| |
| add $inp,$inp,r0 # $inp is adjusted in such |
| # way that at exit from the |
| # loop inX-in5 are loaded |
| # with last "words" |
| vxor $in2,$twk2,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk2,$tweak,$rndkey0 |
| vaddubm $tweak,$tweak,$tweak |
| vcipher $out0,$out0,v27 |
| vcipher $out1,$out1,v27 |
| vsldoi $tmp,$tmp,$tmp,15 |
| vcipher $out2,$out2,v27 |
| vcipher $out3,$out3,v27 |
| vand $tmp,$tmp,$eighty7 |
| vcipher $out4,$out4,v27 |
| vcipher $out5,$out5,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vxor $tweak,$tweak,$tmp |
| vcipher $out0,$out0,v28 |
| vcipher $out1,$out1,v28 |
| vxor $in3,$twk3,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk3,$tweak,$rndkey0 |
| vcipher $out2,$out2,v28 |
| vcipher $out3,$out3,v28 |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vcipher $out4,$out4,v28 |
| vcipher $out5,$out5,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| vand $tmp,$tmp,$eighty7 |
| |
| vcipher $out0,$out0,v29 |
| vcipher $out1,$out1,v29 |
| vxor $tweak,$tweak,$tmp |
| vcipher $out2,$out2,v29 |
| vcipher $out3,$out3,v29 |
| vxor $in4,$twk4,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk4,$tweak,$rndkey0 |
| vcipher $out4,$out4,v29 |
| vcipher $out5,$out5,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| |
| vcipher $out0,$out0,v30 |
| vcipher $out1,$out1,v30 |
| vand $tmp,$tmp,$eighty7 |
| vcipher $out2,$out2,v30 |
| vcipher $out3,$out3,v30 |
| vxor $tweak,$tweak,$tmp |
| vcipher $out4,$out4,v30 |
| vcipher $out5,$out5,v30 |
| vxor $in5,$twk5,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk5,$tweak,$rndkey0 |
| |
| vcipherlast $out0,$out0,$in0 |
| lvx_u $in0,$x00,$inp # load next input block |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vcipherlast $out1,$out1,$in1 |
| lvx_u $in1,$x10,$inp |
| vcipherlast $out2,$out2,$in2 |
| le?vperm $in0,$in0,$in0,$leperm |
| lvx_u $in2,$x20,$inp |
| vand $tmp,$tmp,$eighty7 |
| vcipherlast $out3,$out3,$in3 |
| le?vperm $in1,$in1,$in1,$leperm |
| lvx_u $in3,$x30,$inp |
| vcipherlast $out4,$out4,$in4 |
| le?vperm $in2,$in2,$in2,$leperm |
| lvx_u $in4,$x40,$inp |
| vxor $tweak,$tweak,$tmp |
| vcipherlast $tmp,$out5,$in5 # last block might be needed |
| # in stealing mode |
| le?vperm $in3,$in3,$in3,$leperm |
| lvx_u $in5,$x50,$inp |
| addi $inp,$inp,0x60 |
| le?vperm $in4,$in4,$in4,$leperm |
| le?vperm $in5,$in5,$in5,$leperm |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk0 |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| vxor $out1,$in1,$twk1 |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| vxor $out2,$in2,$twk2 |
| le?vperm $out4,$out4,$out4,$leperm |
| stvx_u $out3,$x30,$out |
| vxor $out3,$in3,$twk3 |
| le?vperm $out5,$tmp,$tmp,$leperm |
| stvx_u $out4,$x40,$out |
| vxor $out4,$in4,$twk4 |
| le?stvx_u $out5,$x50,$out |
| be?stvx_u $tmp, $x50,$out |
| vxor $out5,$in5,$twk5 |
| addi $out,$out,0x60 |
| |
| mtctr $rounds |
| beq Loop_xts_enc6x # did $len-=96 borrow? |
| |
| addic. $len,$len,0x60 |
| beq Lxts_enc6x_zero |
| cmpwi $len,0x20 |
| blt Lxts_enc6x_one |
| nop |
| beq Lxts_enc6x_two |
| cmpwi $len,0x40 |
| blt Lxts_enc6x_three |
| nop |
| beq Lxts_enc6x_four |
| |
| Lxts_enc6x_five: |
| vxor $out0,$in1,$twk0 |
| vxor $out1,$in2,$twk1 |
| vxor $out2,$in3,$twk2 |
| vxor $out3,$in4,$twk3 |
| vxor $out4,$in5,$twk4 |
| |
| bl _aesp8_xts_enc5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk5 # unused tweak |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| vxor $tmp,$out4,$twk5 # last block prep for stealing |
| le?vperm $out4,$out4,$out4,$leperm |
| stvx_u $out3,$x30,$out |
| stvx_u $out4,$x40,$out |
| addi $out,$out,0x50 |
| bne Lxts_enc6x_steal |
| b Lxts_enc6x_done |
| |
| .align 4 |
| Lxts_enc6x_four: |
| vxor $out0,$in2,$twk0 |
| vxor $out1,$in3,$twk1 |
| vxor $out2,$in4,$twk2 |
| vxor $out3,$in5,$twk3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_enc5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk4 # unused tweak |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| vxor $tmp,$out3,$twk4 # last block prep for stealing |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| stvx_u $out3,$x30,$out |
| addi $out,$out,0x40 |
| bne Lxts_enc6x_steal |
| b Lxts_enc6x_done |
| |
| .align 4 |
| Lxts_enc6x_three: |
| vxor $out0,$in3,$twk0 |
| vxor $out1,$in4,$twk1 |
| vxor $out2,$in5,$twk2 |
| vxor $out3,$out3,$out3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_enc5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk3 # unused tweak |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $tmp,$out2,$twk3 # last block prep for stealing |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| stvx_u $out2,$x20,$out |
| addi $out,$out,0x30 |
| bne Lxts_enc6x_steal |
| b Lxts_enc6x_done |
| |
| .align 4 |
| Lxts_enc6x_two: |
| vxor $out0,$in4,$twk0 |
| vxor $out1,$in5,$twk1 |
| vxor $out2,$out2,$out2 |
| vxor $out3,$out3,$out3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_enc5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk2 # unused tweak |
| vxor $tmp,$out1,$twk2 # last block prep for stealing |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| stvx_u $out1,$x10,$out |
| addi $out,$out,0x20 |
| bne Lxts_enc6x_steal |
| b Lxts_enc6x_done |
| |
| .align 4 |
| Lxts_enc6x_one: |
| vxor $out0,$in5,$twk0 |
| nop |
| Loop_xts_enc1x: |
| vcipher $out0,$out0,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vcipher $out0,$out0,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_xts_enc1x |
| |
| add $inp,$inp,$taillen |
| cmpwi $taillen,0 |
| vcipher $out0,$out0,v24 |
| |
| subi $inp,$inp,16 |
| vcipher $out0,$out0,v25 |
| |
| lvsr $inpperm,0,$taillen |
| vcipher $out0,$out0,v26 |
| |
| lvx_u $in0,0,$inp |
| vcipher $out0,$out0,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vcipher $out0,$out0,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| |
| vcipher $out0,$out0,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vxor $twk0,$twk0,v31 |
| |
| le?vperm $in0,$in0,$in0,$leperm |
| vcipher $out0,$out0,v30 |
| |
| vperm $in0,$in0,$in0,$inpperm |
| vcipherlast $out0,$out0,$twk0 |
| |
| vmr $twk0,$twk1 # unused tweak |
| vxor $tmp,$out0,$twk1 # last block prep for stealing |
| le?vperm $out0,$out0,$out0,$leperm |
| stvx_u $out0,$x00,$out # store output |
| addi $out,$out,0x10 |
| bne Lxts_enc6x_steal |
| b Lxts_enc6x_done |
| |
| .align 4 |
| Lxts_enc6x_zero: |
| cmpwi $taillen,0 |
| beq Lxts_enc6x_done |
| |
| add $inp,$inp,$taillen |
| subi $inp,$inp,16 |
| lvx_u $in0,0,$inp |
| lvsr $inpperm,0,$taillen # $in5 is no more |
| le?vperm $in0,$in0,$in0,$leperm |
| vperm $in0,$in0,$in0,$inpperm |
| vxor $tmp,$tmp,$twk0 |
| Lxts_enc6x_steal: |
| vxor $in0,$in0,$twk0 |
| vxor $out0,$out0,$out0 |
| vspltisb $out1,-1 |
| vperm $out0,$out0,$out1,$inpperm |
| vsel $out0,$in0,$tmp,$out0 # $tmp is last block, remember? |
| |
| subi r30,$out,17 |
| subi $out,$out,16 |
| mtctr $taillen |
| Loop_xts_enc6x_steal: |
| lbzu r0,1(r30) |
| stb r0,16(r30) |
| bdnz Loop_xts_enc6x_steal |
| |
| li $taillen,0 |
| mtctr $rounds |
| b Loop_xts_enc1x # one more time... |
| |
| .align 4 |
| Lxts_enc6x_done: |
| ${UCMP}i $ivp,0 |
| beq Lxts_enc6x_ret |
| |
| vxor $tweak,$twk0,$rndkey0 |
| le?vperm $tweak,$tweak,$tweak,$leperm |
| stvx_u $tweak,0,$ivp |
| |
| Lxts_enc6x_ret: |
| mtlr r11 |
| li r10,`$FRAME+15` |
| li r11,`$FRAME+31` |
| stvx $seven,r10,$sp # wipe copies of round keys |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| |
| mtspr 256,$vrsave |
| lvx v20,r10,$sp # ABI says so |
| 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 |
| $POP r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| $POP r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| $POP r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| $POP r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| $POP r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| $POP r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| addi $sp,$sp,`$FRAME+21*16+6*$SIZE_T` |
| blr |
| .long 0 |
| .byte 0,12,0x04,1,0x80,6,6,0 |
| .long 0 |
| |
| .align 5 |
| _aesp8_xts_enc5x: |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vcipher $out4,$out4,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vcipher $out4,$out4,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz _aesp8_xts_enc5x |
| |
| add $inp,$inp,$taillen |
| cmpwi $taillen,0 |
| vcipher $out0,$out0,v24 |
| vcipher $out1,$out1,v24 |
| vcipher $out2,$out2,v24 |
| vcipher $out3,$out3,v24 |
| vcipher $out4,$out4,v24 |
| |
| subi $inp,$inp,16 |
| vcipher $out0,$out0,v25 |
| vcipher $out1,$out1,v25 |
| vcipher $out2,$out2,v25 |
| vcipher $out3,$out3,v25 |
| vcipher $out4,$out4,v25 |
| vxor $twk0,$twk0,v31 |
| |
| vcipher $out0,$out0,v26 |
| lvsr $inpperm,r0,$taillen # $in5 is no more |
| vcipher $out1,$out1,v26 |
| vcipher $out2,$out2,v26 |
| vcipher $out3,$out3,v26 |
| vcipher $out4,$out4,v26 |
| vxor $in1,$twk1,v31 |
| |
| vcipher $out0,$out0,v27 |
| lvx_u $in0,0,$inp |
| vcipher $out1,$out1,v27 |
| vcipher $out2,$out2,v27 |
| vcipher $out3,$out3,v27 |
| vcipher $out4,$out4,v27 |
| vxor $in2,$twk2,v31 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vcipher $out0,$out0,v28 |
| vcipher $out1,$out1,v28 |
| vcipher $out2,$out2,v28 |
| vcipher $out3,$out3,v28 |
| vcipher $out4,$out4,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| vxor $in3,$twk3,v31 |
| |
| vcipher $out0,$out0,v29 |
| le?vperm $in0,$in0,$in0,$leperm |
| vcipher $out1,$out1,v29 |
| vcipher $out2,$out2,v29 |
| vcipher $out3,$out3,v29 |
| vcipher $out4,$out4,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vxor $in4,$twk4,v31 |
| |
| vcipher $out0,$out0,v30 |
| vperm $in0,$in0,$in0,$inpperm |
| vcipher $out1,$out1,v30 |
| vcipher $out2,$out2,v30 |
| vcipher $out3,$out3,v30 |
| vcipher $out4,$out4,v30 |
| |
| vcipherlast $out0,$out0,$twk0 |
| vcipherlast $out1,$out1,$in1 |
| vcipherlast $out2,$out2,$in2 |
| vcipherlast $out3,$out3,$in3 |
| vcipherlast $out4,$out4,$in4 |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,0,0 |
| |
| .align 5 |
| _aesp8_xts_decrypt6x: |
| $STU $sp,-`($FRAME+21*16+6*$SIZE_T)`($sp) |
| mflr r11 |
| li r7,`$FRAME+8*16+15` |
| li r3,`$FRAME+8*16+31` |
| $PUSH r11,`$FRAME+21*16+6*$SIZE_T+$LRSAVE`($sp) |
| stvx v20,r7,$sp # ABI says so |
| addi r7,r7,32 |
| stvx v21,r3,$sp |
| addi r3,r3,32 |
| stvx v22,r7,$sp |
| addi r7,r7,32 |
| stvx v23,r3,$sp |
| addi r3,r3,32 |
| stvx v24,r7,$sp |
| addi r7,r7,32 |
| stvx v25,r3,$sp |
| addi r3,r3,32 |
| stvx v26,r7,$sp |
| addi r7,r7,32 |
| stvx v27,r3,$sp |
| addi r3,r3,32 |
| stvx v28,r7,$sp |
| addi r7,r7,32 |
| stvx v29,r3,$sp |
| addi r3,r3,32 |
| stvx v30,r7,$sp |
| stvx v31,r3,$sp |
| li r0,-1 |
| stw $vrsave,`$FRAME+21*16-4`($sp) # save vrsave |
| li $x10,0x10 |
| $PUSH r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| li $x20,0x20 |
| $PUSH r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| li $x30,0x30 |
| $PUSH r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| li $x40,0x40 |
| $PUSH r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| li $x50,0x50 |
| $PUSH r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| li $x60,0x60 |
| $PUSH r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| li $x70,0x70 |
| mtspr 256,r0 |
| |
| subi $rounds,$rounds,3 # -4 in total |
| |
| lvx $rndkey0,$x00,$key1 # load key schedule |
| lvx v30,$x10,$key1 |
| addi $key1,$key1,0x20 |
| lvx v31,$x00,$key1 |
| ?vperm $rndkey0,$rndkey0,v30,$keyperm |
| addi $key_,$sp,$FRAME+15 |
| mtctr $rounds |
| |
| Load_xts_dec_key: |
| ?vperm v24,v30,v31,$keyperm |
| lvx v30,$x10,$key1 |
| addi $key1,$key1,0x20 |
| stvx v24,$x00,$key_ # off-load round[1] |
| ?vperm v25,v31,v30,$keyperm |
| lvx v31,$x00,$key1 |
| stvx v25,$x10,$key_ # off-load round[2] |
| addi $key_,$key_,0x20 |
| bdnz Load_xts_dec_key |
| |
| lvx v26,$x10,$key1 |
| ?vperm v24,v30,v31,$keyperm |
| lvx v27,$x20,$key1 |
| stvx v24,$x00,$key_ # off-load round[3] |
| ?vperm v25,v31,v26,$keyperm |
| lvx v28,$x30,$key1 |
| stvx v25,$x10,$key_ # off-load round[4] |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| ?vperm v26,v26,v27,$keyperm |
| lvx v29,$x40,$key1 |
| ?vperm v27,v27,v28,$keyperm |
| lvx v30,$x50,$key1 |
| ?vperm v28,v28,v29,$keyperm |
| lvx v31,$x60,$key1 |
| ?vperm v29,v29,v30,$keyperm |
| lvx $twk5,$x70,$key1 # borrow $twk5 |
| ?vperm v30,v30,v31,$keyperm |
| lvx v24,$x00,$key_ # pre-load round[1] |
| ?vperm v31,v31,$twk5,$keyperm |
| lvx v25,$x10,$key_ # pre-load round[2] |
| |
| vperm $in0,$inout,$inptail,$inpperm |
| subi $inp,$inp,31 # undo "caller" |
| vxor $twk0,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vand $tmp,$tmp,$eighty7 |
| vxor $out0,$in0,$twk0 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in1,$x10,$inp |
| vxor $twk1,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in1,$in1,$in1,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out1,$in1,$twk1 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in2,$x20,$inp |
| andi. $taillen,$len,15 |
| vxor $twk2,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in2,$in2,$in2,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out2,$in2,$twk2 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in3,$x30,$inp |
| sub $len,$len,$taillen |
| vxor $twk3,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in3,$in3,$in3,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out3,$in3,$twk3 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in4,$x40,$inp |
| subi $len,$len,0x60 |
| vxor $twk4,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in4,$in4,$in4,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out4,$in4,$twk4 |
| vxor $tweak,$tweak,$tmp |
| |
| lvx_u $in5,$x50,$inp |
| addi $inp,$inp,0x60 |
| vxor $twk5,$tweak,$rndkey0 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| le?vperm $in5,$in5,$in5,$leperm |
| vand $tmp,$tmp,$eighty7 |
| vxor $out5,$in5,$twk5 |
| vxor $tweak,$tweak,$tmp |
| |
| vxor v31,v31,$rndkey0 |
| mtctr $rounds |
| b Loop_xts_dec6x |
| |
| .align 5 |
| Loop_xts_dec6x: |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_xts_dec6x |
| |
| subic $len,$len,96 # $len-=96 |
| vxor $in0,$twk0,v31 # xor with last round key |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk0,$tweak,$rndkey0 |
| vaddubm $tweak,$tweak,$tweak |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vsldoi $tmp,$tmp,$tmp,15 |
| vncipher $out4,$out4,v24 |
| vncipher $out5,$out5,v24 |
| |
| subfe. r0,r0,r0 # borrow?-1:0 |
| vand $tmp,$tmp,$eighty7 |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vxor $tweak,$tweak,$tmp |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vxor $in1,$twk1,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk1,$tweak,$rndkey0 |
| vncipher $out4,$out4,v25 |
| vncipher $out5,$out5,v25 |
| |
| and r0,r0,$len |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vncipher $out0,$out0,v26 |
| vncipher $out1,$out1,v26 |
| vand $tmp,$tmp,$eighty7 |
| vncipher $out2,$out2,v26 |
| vncipher $out3,$out3,v26 |
| vxor $tweak,$tweak,$tmp |
| vncipher $out4,$out4,v26 |
| vncipher $out5,$out5,v26 |
| |
| add $inp,$inp,r0 # $inp is adjusted in such |
| # way that at exit from the |
| # loop inX-in5 are loaded |
| # with last "words" |
| vxor $in2,$twk2,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk2,$tweak,$rndkey0 |
| vaddubm $tweak,$tweak,$tweak |
| vncipher $out0,$out0,v27 |
| vncipher $out1,$out1,v27 |
| vsldoi $tmp,$tmp,$tmp,15 |
| vncipher $out2,$out2,v27 |
| vncipher $out3,$out3,v27 |
| vand $tmp,$tmp,$eighty7 |
| vncipher $out4,$out4,v27 |
| vncipher $out5,$out5,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vxor $tweak,$tweak,$tmp |
| vncipher $out0,$out0,v28 |
| vncipher $out1,$out1,v28 |
| vxor $in3,$twk3,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk3,$tweak,$rndkey0 |
| vncipher $out2,$out2,v28 |
| vncipher $out3,$out3,v28 |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vncipher $out4,$out4,v28 |
| vncipher $out5,$out5,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| vand $tmp,$tmp,$eighty7 |
| |
| vncipher $out0,$out0,v29 |
| vncipher $out1,$out1,v29 |
| vxor $tweak,$tweak,$tmp |
| vncipher $out2,$out2,v29 |
| vncipher $out3,$out3,v29 |
| vxor $in4,$twk4,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk4,$tweak,$rndkey0 |
| vncipher $out4,$out4,v29 |
| vncipher $out5,$out5,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| |
| vncipher $out0,$out0,v30 |
| vncipher $out1,$out1,v30 |
| vand $tmp,$tmp,$eighty7 |
| vncipher $out2,$out2,v30 |
| vncipher $out3,$out3,v30 |
| vxor $tweak,$tweak,$tmp |
| vncipher $out4,$out4,v30 |
| vncipher $out5,$out5,v30 |
| vxor $in5,$twk5,v31 |
| vsrab $tmp,$tweak,$seven # next tweak value |
| vxor $twk5,$tweak,$rndkey0 |
| |
| vncipherlast $out0,$out0,$in0 |
| lvx_u $in0,$x00,$inp # load next input block |
| vaddubm $tweak,$tweak,$tweak |
| vsldoi $tmp,$tmp,$tmp,15 |
| vncipherlast $out1,$out1,$in1 |
| lvx_u $in1,$x10,$inp |
| vncipherlast $out2,$out2,$in2 |
| le?vperm $in0,$in0,$in0,$leperm |
| lvx_u $in2,$x20,$inp |
| vand $tmp,$tmp,$eighty7 |
| vncipherlast $out3,$out3,$in3 |
| le?vperm $in1,$in1,$in1,$leperm |
| lvx_u $in3,$x30,$inp |
| vncipherlast $out4,$out4,$in4 |
| le?vperm $in2,$in2,$in2,$leperm |
| lvx_u $in4,$x40,$inp |
| vxor $tweak,$tweak,$tmp |
| vncipherlast $out5,$out5,$in5 |
| le?vperm $in3,$in3,$in3,$leperm |
| lvx_u $in5,$x50,$inp |
| addi $inp,$inp,0x60 |
| le?vperm $in4,$in4,$in4,$leperm |
| le?vperm $in5,$in5,$in5,$leperm |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk0 |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| vxor $out1,$in1,$twk1 |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| vxor $out2,$in2,$twk2 |
| le?vperm $out4,$out4,$out4,$leperm |
| stvx_u $out3,$x30,$out |
| vxor $out3,$in3,$twk3 |
| le?vperm $out5,$out5,$out5,$leperm |
| stvx_u $out4,$x40,$out |
| vxor $out4,$in4,$twk4 |
| stvx_u $out5,$x50,$out |
| vxor $out5,$in5,$twk5 |
| addi $out,$out,0x60 |
| |
| mtctr $rounds |
| beq Loop_xts_dec6x # did $len-=96 borrow? |
| |
| addic. $len,$len,0x60 |
| beq Lxts_dec6x_zero |
| cmpwi $len,0x20 |
| blt Lxts_dec6x_one |
| nop |
| beq Lxts_dec6x_two |
| cmpwi $len,0x40 |
| blt Lxts_dec6x_three |
| nop |
| beq Lxts_dec6x_four |
| |
| Lxts_dec6x_five: |
| vxor $out0,$in1,$twk0 |
| vxor $out1,$in2,$twk1 |
| vxor $out2,$in3,$twk2 |
| vxor $out3,$in4,$twk3 |
| vxor $out4,$in5,$twk4 |
| |
| bl _aesp8_xts_dec5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk5 # unused tweak |
| vxor $twk1,$tweak,$rndkey0 |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk1 |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| le?vperm $out4,$out4,$out4,$leperm |
| stvx_u $out3,$x30,$out |
| stvx_u $out4,$x40,$out |
| addi $out,$out,0x50 |
| bne Lxts_dec6x_steal |
| b Lxts_dec6x_done |
| |
| .align 4 |
| Lxts_dec6x_four: |
| vxor $out0,$in2,$twk0 |
| vxor $out1,$in3,$twk1 |
| vxor $out2,$in4,$twk2 |
| vxor $out3,$in5,$twk3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_dec5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk4 # unused tweak |
| vmr $twk1,$twk5 |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk5 |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| le?vperm $out3,$out3,$out3,$leperm |
| stvx_u $out2,$x20,$out |
| stvx_u $out3,$x30,$out |
| addi $out,$out,0x40 |
| bne Lxts_dec6x_steal |
| b Lxts_dec6x_done |
| |
| .align 4 |
| Lxts_dec6x_three: |
| vxor $out0,$in3,$twk0 |
| vxor $out1,$in4,$twk1 |
| vxor $out2,$in5,$twk2 |
| vxor $out3,$out3,$out3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_dec5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk3 # unused tweak |
| vmr $twk1,$twk4 |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk4 |
| le?vperm $out2,$out2,$out2,$leperm |
| stvx_u $out1,$x10,$out |
| stvx_u $out2,$x20,$out |
| addi $out,$out,0x30 |
| bne Lxts_dec6x_steal |
| b Lxts_dec6x_done |
| |
| .align 4 |
| Lxts_dec6x_two: |
| vxor $out0,$in4,$twk0 |
| vxor $out1,$in5,$twk1 |
| vxor $out2,$out2,$out2 |
| vxor $out3,$out3,$out3 |
| vxor $out4,$out4,$out4 |
| |
| bl _aesp8_xts_dec5x |
| |
| le?vperm $out0,$out0,$out0,$leperm |
| vmr $twk0,$twk2 # unused tweak |
| vmr $twk1,$twk3 |
| le?vperm $out1,$out1,$out1,$leperm |
| stvx_u $out0,$x00,$out # store output |
| vxor $out0,$in0,$twk3 |
| stvx_u $out1,$x10,$out |
| addi $out,$out,0x20 |
| bne Lxts_dec6x_steal |
| b Lxts_dec6x_done |
| |
| .align 4 |
| Lxts_dec6x_one: |
| vxor $out0,$in5,$twk0 |
| nop |
| Loop_xts_dec1x: |
| vncipher $out0,$out0,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out0,$out0,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Loop_xts_dec1x |
| |
| subi r0,$taillen,1 |
| vncipher $out0,$out0,v24 |
| |
| andi. r0,r0,16 |
| cmpwi $taillen,0 |
| vncipher $out0,$out0,v25 |
| |
| sub $inp,$inp,r0 |
| vncipher $out0,$out0,v26 |
| |
| lvx_u $in0,0,$inp |
| vncipher $out0,$out0,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vncipher $out0,$out0,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| |
| vncipher $out0,$out0,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vxor $twk0,$twk0,v31 |
| |
| le?vperm $in0,$in0,$in0,$leperm |
| vncipher $out0,$out0,v30 |
| |
| mtctr $rounds |
| vncipherlast $out0,$out0,$twk0 |
| |
| vmr $twk0,$twk1 # unused tweak |
| vmr $twk1,$twk2 |
| le?vperm $out0,$out0,$out0,$leperm |
| stvx_u $out0,$x00,$out # store output |
| addi $out,$out,0x10 |
| vxor $out0,$in0,$twk2 |
| bne Lxts_dec6x_steal |
| b Lxts_dec6x_done |
| |
| .align 4 |
| Lxts_dec6x_zero: |
| cmpwi $taillen,0 |
| beq Lxts_dec6x_done |
| |
| lvx_u $in0,0,$inp |
| le?vperm $in0,$in0,$in0,$leperm |
| vxor $out0,$in0,$twk1 |
| Lxts_dec6x_steal: |
| vncipher $out0,$out0,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out0,$out0,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz Lxts_dec6x_steal |
| |
| add $inp,$inp,$taillen |
| vncipher $out0,$out0,v24 |
| |
| cmpwi $taillen,0 |
| vncipher $out0,$out0,v25 |
| |
| lvx_u $in0,0,$inp |
| vncipher $out0,$out0,v26 |
| |
| lvsr $inpperm,0,$taillen # $in5 is no more |
| vncipher $out0,$out0,v27 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vncipher $out0,$out0,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| |
| vncipher $out0,$out0,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vxor $twk1,$twk1,v31 |
| |
| le?vperm $in0,$in0,$in0,$leperm |
| vncipher $out0,$out0,v30 |
| |
| vperm $in0,$in0,$in0,$inpperm |
| vncipherlast $tmp,$out0,$twk1 |
| |
| le?vperm $out0,$tmp,$tmp,$leperm |
| le?stvx_u $out0,0,$out |
| be?stvx_u $tmp,0,$out |
| |
| vxor $out0,$out0,$out0 |
| vspltisb $out1,-1 |
| vperm $out0,$out0,$out1,$inpperm |
| vsel $out0,$in0,$tmp,$out0 |
| vxor $out0,$out0,$twk0 |
| |
| subi r30,$out,1 |
| mtctr $taillen |
| Loop_xts_dec6x_steal: |
| lbzu r0,1(r30) |
| stb r0,16(r30) |
| bdnz Loop_xts_dec6x_steal |
| |
| li $taillen,0 |
| mtctr $rounds |
| b Loop_xts_dec1x # one more time... |
| |
| .align 4 |
| Lxts_dec6x_done: |
| ${UCMP}i $ivp,0 |
| beq Lxts_dec6x_ret |
| |
| vxor $tweak,$twk0,$rndkey0 |
| le?vperm $tweak,$tweak,$tweak,$leperm |
| stvx_u $tweak,0,$ivp |
| |
| Lxts_dec6x_ret: |
| mtlr r11 |
| li r10,`$FRAME+15` |
| li r11,`$FRAME+31` |
| stvx $seven,r10,$sp # wipe copies of round keys |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| stvx $seven,r10,$sp |
| addi r10,r10,32 |
| stvx $seven,r11,$sp |
| addi r11,r11,32 |
| |
| mtspr 256,$vrsave |
| lvx v20,r10,$sp # ABI says so |
| 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 |
| $POP r26,`$FRAME+21*16+0*$SIZE_T`($sp) |
| $POP r27,`$FRAME+21*16+1*$SIZE_T`($sp) |
| $POP r28,`$FRAME+21*16+2*$SIZE_T`($sp) |
| $POP r29,`$FRAME+21*16+3*$SIZE_T`($sp) |
| $POP r30,`$FRAME+21*16+4*$SIZE_T`($sp) |
| $POP r31,`$FRAME+21*16+5*$SIZE_T`($sp) |
| addi $sp,$sp,`$FRAME+21*16+6*$SIZE_T` |
| blr |
| .long 0 |
| .byte 0,12,0x04,1,0x80,6,6,0 |
| .long 0 |
| |
| .align 5 |
| _aesp8_xts_dec5x: |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| lvx v24,$x20,$key_ # round[3] |
| addi $key_,$key_,0x20 |
| |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| lvx v25,$x10,$key_ # round[4] |
| bdnz _aesp8_xts_dec5x |
| |
| subi r0,$taillen,1 |
| vncipher $out0,$out0,v24 |
| vncipher $out1,$out1,v24 |
| vncipher $out2,$out2,v24 |
| vncipher $out3,$out3,v24 |
| vncipher $out4,$out4,v24 |
| |
| andi. r0,r0,16 |
| cmpwi $taillen,0 |
| vncipher $out0,$out0,v25 |
| vncipher $out1,$out1,v25 |
| vncipher $out2,$out2,v25 |
| vncipher $out3,$out3,v25 |
| vncipher $out4,$out4,v25 |
| vxor $twk0,$twk0,v31 |
| |
| sub $inp,$inp,r0 |
| vncipher $out0,$out0,v26 |
| vncipher $out1,$out1,v26 |
| vncipher $out2,$out2,v26 |
| vncipher $out3,$out3,v26 |
| vncipher $out4,$out4,v26 |
| vxor $in1,$twk1,v31 |
| |
| vncipher $out0,$out0,v27 |
| lvx_u $in0,0,$inp |
| vncipher $out1,$out1,v27 |
| vncipher $out2,$out2,v27 |
| vncipher $out3,$out3,v27 |
| vncipher $out4,$out4,v27 |
| vxor $in2,$twk2,v31 |
| |
| addi $key_,$sp,$FRAME+15 # rewind $key_ |
| vncipher $out0,$out0,v28 |
| vncipher $out1,$out1,v28 |
| vncipher $out2,$out2,v28 |
| vncipher $out3,$out3,v28 |
| vncipher $out4,$out4,v28 |
| lvx v24,$x00,$key_ # re-pre-load round[1] |
| vxor $in3,$twk3,v31 |
| |
| vncipher $out0,$out0,v29 |
| le?vperm $in0,$in0,$in0,$leperm |
| vncipher $out1,$out1,v29 |
| vncipher $out2,$out2,v29 |
| vncipher $out3,$out3,v29 |
| vncipher $out4,$out4,v29 |
| lvx v25,$x10,$key_ # re-pre-load round[2] |
| vxor $in4,$twk4,v31 |
| |
| vncipher $out0,$out0,v30 |
| vncipher $out1,$out1,v30 |
| vncipher $out2,$out2,v30 |
| vncipher $out3,$out3,v30 |
| vncipher $out4,$out4,v30 |
| |
| vncipherlast $out0,$out0,$twk0 |
| vncipherlast $out1,$out1,$in1 |
| vncipherlast $out2,$out2,$in2 |
| vncipherlast $out3,$out3,$in3 |
| vncipherlast $out4,$out4,$in4 |
| mtctr $rounds |
| blr |
| .long 0 |
| .byte 0,12,0x14,0,0,0,0,0 |
| ___ |
| }} }}} |
| |
| my $consts=1; |
| foreach(split("\n",$code)) { |
| s/\`([^\`]*)\`/eval($1)/geo; |
| |
| # constants table endian-specific conversion |
| if ($consts && m/\.(long|byte)\s+(.+)\s+(\?[a-z]*)$/o) { |
| my $conv=$3; |
| my @bytes=(); |
| |
| # convert to endian-agnostic format |
| if ($1 eq "long") { |
| foreach (split(/,\s*/,$2)) { |
| my $l = /^0/?oct:int; |
| push @bytes,($l>>24)&0xff,($l>>16)&0xff,($l>>8)&0xff,$l&0xff; |
| } |
| } else { |
| @bytes = map(/^0/?oct:int,split(/,\s*/,$2)); |
| } |
| |
| # little-endian conversion |
| if ($flavour =~ /le$/o) { |
| SWITCH: for($conv) { |
| /\?inv/ && do { @bytes=map($_^0xf,@bytes); last; }; |
| /\?rev/ && do { @bytes=reverse(@bytes); last; }; |
| } |
| } |
| |
| #emit |
| print ".byte\t",join(',',map (sprintf("0x%02x",$_),@bytes)),"\n"; |
| next; |
| } |
| $consts=0 if (m/Lconsts:/o); # end of table |
| |
| # instructions prefixed with '?' are endian-specific and need |
| # to be adjusted accordingly... |
| if ($flavour =~ /le$/o) { # little-endian |
| s/le\?//o or |
| s/be\?/#be#/o or |
| s/\?lvsr/lvsl/o or |
| s/\?lvsl/lvsr/o or |
| s/\?(vperm\s+v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+)/$1$3$2$4/o or |
| s/\?(vsldoi\s+v[0-9]+,\s*)(v[0-9]+,)\s*(v[0-9]+,\s*)([0-9]+)/$1$3$2 16-$4/o or |
| s/\?(vspltw\s+v[0-9]+,\s*)(v[0-9]+,)\s*([0-9])/$1$2 3-$3/o; |
| } else { # big-endian |
| s/le\?/#le#/o or |
| s/be\?//o or |
| s/\?([a-z]+)/$1/o; |
| } |
| |
| print $_,"\n"; |
| } |
| |
| close STDOUT; |
