--- /dev/null
+#! /usr/bin/env perl
+# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License"). You may not use
+# this file except in compliance with the License. You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+#
+# ====================================================================
+# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
+# project. The module is, however, dual licensed under OpenSSL and
+# CRYPTOGAMS licenses depending on where you obtain it. For further
+# details see http://www.openssl.org/~appro/cryptogams/.
+# ====================================================================
+#
+# October 2015
+#
+# ChaCha20 for PowerPC/AltiVec.
+#
+# Performance in cycles per byte out of large buffer.
+#
+# IALU/gcc-4.x 3xAltiVec+1xIALU
+#
+# Freescale e300 13.6/+115% -
+# PPC74x0 6.81/+310% 4.66
+# POWER7 8.62/+61% 4.27
+# POWER8 8.70/+51% 3.96
+
+$flavour = shift;
+
+if ($flavour =~ /64/) {
+ $SIZE_T =8;
+ $LRSAVE =2*$SIZE_T;
+ $STU ="stdu";
+ $POP ="ld";
+ $PUSH ="std";
+ $UCMP ="cmpld";
+} elsif ($flavour =~ /32/) {
+ $SIZE_T =4;
+ $LRSAVE =$SIZE_T;
+ $STU ="stwu";
+ $POP ="lwz";
+ $PUSH ="stw";
+ $UCMP ="cmplw";
+} else { die "nonsense $flavour"; }
+
+$LITTLE_ENDIAN = ($flavour=~/le$/) ? 1 : 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: $!";
+
+$LOCALS=6*$SIZE_T;
+$FRAME=$LOCALS+64+18*$SIZE_T; # 64 is for local variables
+
+sub AUTOLOAD() # thunk [simplified] x86-style perlasm
+{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://; $opcode =~ s/_/\./;
+ $code .= "\t$opcode\t".join(',',@_)."\n";
+}
+
+my $sp = "r1";
+
+my ($out,$inp,$len,$key,$ctr) = map("r$_",(3..7));
+
+my @x=map("r$_",(16..31));
+my @d=map("r$_",(11,12,14,15));
+my @t=map("r$_",(7..10));
+
+sub ROUND {
+my ($a0,$b0,$c0,$d0)=@_;
+my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
+my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
+my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
+
+ (
+ "&add (@x[$a0],@x[$a0],@x[$b0])",
+ "&add (@x[$a1],@x[$a1],@x[$b1])",
+ "&add (@x[$a2],@x[$a2],@x[$b2])",
+ "&add (@x[$a3],@x[$a3],@x[$b3])",
+ "&xor (@x[$d0],@x[$d0],@x[$a0])",
+ "&xor (@x[$d1],@x[$d1],@x[$a1])",
+ "&xor (@x[$d2],@x[$d2],@x[$a2])",
+ "&xor (@x[$d3],@x[$d3],@x[$a3])",
+ "&rotlwi (@x[$d0],@x[$d0],16)",
+ "&rotlwi (@x[$d1],@x[$d1],16)",
+ "&rotlwi (@x[$d2],@x[$d2],16)",
+ "&rotlwi (@x[$d3],@x[$d3],16)",
+
+ "&add (@x[$c0],@x[$c0],@x[$d0])",
+ "&add (@x[$c1],@x[$c1],@x[$d1])",
+ "&add (@x[$c2],@x[$c2],@x[$d2])",
+ "&add (@x[$c3],@x[$c3],@x[$d3])",
+ "&xor (@x[$b0],@x[$b0],@x[$c0])",
+ "&xor (@x[$b1],@x[$b1],@x[$c1])",
+ "&xor (@x[$b2],@x[$b2],@x[$c2])",
+ "&xor (@x[$b3],@x[$b3],@x[$c3])",
+ "&rotlwi (@x[$b0],@x[$b0],12)",
+ "&rotlwi (@x[$b1],@x[$b1],12)",
+ "&rotlwi (@x[$b2],@x[$b2],12)",
+ "&rotlwi (@x[$b3],@x[$b3],12)",
+
+ "&add (@x[$a0],@x[$a0],@x[$b0])",
+ "&add (@x[$a1],@x[$a1],@x[$b1])",
+ "&add (@x[$a2],@x[$a2],@x[$b2])",
+ "&add (@x[$a3],@x[$a3],@x[$b3])",
+ "&xor (@x[$d0],@x[$d0],@x[$a0])",
+ "&xor (@x[$d1],@x[$d1],@x[$a1])",
+ "&xor (@x[$d2],@x[$d2],@x[$a2])",
+ "&xor (@x[$d3],@x[$d3],@x[$a3])",
+ "&rotlwi (@x[$d0],@x[$d0],8)",
+ "&rotlwi (@x[$d1],@x[$d1],8)",
+ "&rotlwi (@x[$d2],@x[$d2],8)",
+ "&rotlwi (@x[$d3],@x[$d3],8)",
+
+ "&add (@x[$c0],@x[$c0],@x[$d0])",
+ "&add (@x[$c1],@x[$c1],@x[$d1])",
+ "&add (@x[$c2],@x[$c2],@x[$d2])",
+ "&add (@x[$c3],@x[$c3],@x[$d3])",
+ "&xor (@x[$b0],@x[$b0],@x[$c0])",
+ "&xor (@x[$b1],@x[$b1],@x[$c1])",
+ "&xor (@x[$b2],@x[$b2],@x[$c2])",
+ "&xor (@x[$b3],@x[$b3],@x[$c3])",
+ "&rotlwi (@x[$b0],@x[$b0],7)",
+ "&rotlwi (@x[$b1],@x[$b1],7)",
+ "&rotlwi (@x[$b2],@x[$b2],7)",
+ "&rotlwi (@x[$b3],@x[$b3],7)"
+ );
+}
+
+$code.=<<___;
+.machine "any"
+.text
+
+.globl .ChaCha20_ctr32_int
+.align 5
+.ChaCha20_ctr32_int:
+__ChaCha20_ctr32_int:
+ ${UCMP}i $len,0
+ beqlr-
+
+ $STU $sp,-$FRAME($sp)
+ mflr r0
+
+ $PUSH r14,`$FRAME-$SIZE_T*18`($sp)
+ $PUSH r15,`$FRAME-$SIZE_T*17`($sp)
+ $PUSH r16,`$FRAME-$SIZE_T*16`($sp)
+ $PUSH r17,`$FRAME-$SIZE_T*15`($sp)
+ $PUSH r18,`$FRAME-$SIZE_T*14`($sp)
+ $PUSH r19,`$FRAME-$SIZE_T*13`($sp)
+ $PUSH r20,`$FRAME-$SIZE_T*12`($sp)
+ $PUSH r21,`$FRAME-$SIZE_T*11`($sp)
+ $PUSH r22,`$FRAME-$SIZE_T*10`($sp)
+ $PUSH r23,`$FRAME-$SIZE_T*9`($sp)
+ $PUSH r24,`$FRAME-$SIZE_T*8`($sp)
+ $PUSH r25,`$FRAME-$SIZE_T*7`($sp)
+ $PUSH r26,`$FRAME-$SIZE_T*6`($sp)
+ $PUSH r27,`$FRAME-$SIZE_T*5`($sp)
+ $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
+ $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
+ $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
+ $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
+ $PUSH r0,`$FRAME+$LRSAVE`($sp)
+
+ lwz @d[0],0($ctr) # load counter
+ lwz @d[1],4($ctr)
+ lwz @d[2],8($ctr)
+ lwz @d[3],12($ctr)
+
+ bl __ChaCha20_1x
+
+ $POP r0,`$FRAME+$LRSAVE`($sp)
+ $POP r14,`$FRAME-$SIZE_T*18`($sp)
+ $POP r15,`$FRAME-$SIZE_T*17`($sp)
+ $POP r16,`$FRAME-$SIZE_T*16`($sp)
+ $POP r17,`$FRAME-$SIZE_T*15`($sp)
+ $POP r18,`$FRAME-$SIZE_T*14`($sp)
+ $POP r19,`$FRAME-$SIZE_T*13`($sp)
+ $POP r20,`$FRAME-$SIZE_T*12`($sp)
+ $POP r21,`$FRAME-$SIZE_T*11`($sp)
+ $POP r22,`$FRAME-$SIZE_T*10`($sp)
+ $POP r23,`$FRAME-$SIZE_T*9`($sp)
+ $POP r24,`$FRAME-$SIZE_T*8`($sp)
+ $POP r25,`$FRAME-$SIZE_T*7`($sp)
+ $POP r26,`$FRAME-$SIZE_T*6`($sp)
+ $POP r27,`$FRAME-$SIZE_T*5`($sp)
+ $POP r28,`$FRAME-$SIZE_T*4`($sp)
+ $POP r29,`$FRAME-$SIZE_T*3`($sp)
+ $POP r30,`$FRAME-$SIZE_T*2`($sp)
+ $POP r31,`$FRAME-$SIZE_T*1`($sp)
+ mtlr r0
+ addi $sp,$sp,$FRAME
+ blr
+ .long 0
+ .byte 0,12,4,1,0x80,18,5,0
+ .long 0
+.size .ChaCha20_ctr32_int,.-.ChaCha20_ctr32_int
+
+.align 5
+__ChaCha20_1x:
+Loop_outer:
+ lis @x[0],0x6170 # synthesize sigma
+ lis @x[1],0x3320
+ lis @x[2],0x7962
+ lis @x[3],0x6b20
+ ori @x[0],@x[0],0x7865
+ ori @x[1],@x[1],0x646e
+ ori @x[2],@x[2],0x2d32
+ ori @x[3],@x[3],0x6574
+
+ li r0,10 # inner loop counter
+ lwz @x[4],0($key) # load key
+ lwz @x[5],4($key)
+ lwz @x[6],8($key)
+ lwz @x[7],12($key)
+ lwz @x[8],16($key)
+ mr @x[12],@d[0] # copy counter
+ lwz @x[9],20($key)
+ mr @x[13],@d[1]
+ lwz @x[10],24($key)
+ mr @x[14],@d[2]
+ lwz @x[11],28($key)
+ mr @x[15],@d[3]
+
+ mr @t[0],@x[4]
+ mr @t[1],@x[5]
+ mr @t[2],@x[6]
+ mr @t[3],@x[7]
+
+ mtctr r0
+Loop:
+___
+ foreach (&ROUND(0, 4, 8,12)) { eval; }
+ foreach (&ROUND(0, 5,10,15)) { eval; }
+$code.=<<___;
+ bdnz Loop
+
+ subic $len,$len,64 # $len-=64
+ addi @x[0],@x[0],0x7865 # accumulate key block
+ addi @x[1],@x[1],0x646e
+ addi @x[2],@x[2],0x2d32
+ addi @x[3],@x[3],0x6574
+ addis @x[0],@x[0],0x6170
+ addis @x[1],@x[1],0x3320
+ addis @x[2],@x[2],0x7962
+ addis @x[3],@x[3],0x6b20
+
+ subfe. r0,r0,r0 # borrow?-1:0
+ add @x[4],@x[4],@t[0]
+ lwz @t[0],16($key)
+ add @x[5],@x[5],@t[1]
+ lwz @t[1],20($key)
+ add @x[6],@x[6],@t[2]
+ lwz @t[2],24($key)
+ add @x[7],@x[7],@t[3]
+ lwz @t[3],28($key)
+ add @x[8],@x[8],@t[0]
+ add @x[9],@x[9],@t[1]
+ add @x[10],@x[10],@t[2]
+ add @x[11],@x[11],@t[3]
+
+ add @x[12],@x[12],@d[0]
+ add @x[13],@x[13],@d[1]
+ add @x[14],@x[14],@d[2]
+ add @x[15],@x[15],@d[3]
+ addi @d[0],@d[0],1 # increment counter
+___
+if (!$LITTLE_ENDIAN) { for($i=0;$i<16;$i++) { # flip byte order
+$code.=<<___;
+ mr @t[$i&3],@x[$i]
+ rotlwi @x[$i],@x[$i],8
+ rlwimi @x[$i],@t[$i&3],24,0,7
+ rlwimi @x[$i],@t[$i&3],24,16,23
+___
+} }
+$code.=<<___;
+ bne Ltail # $len-=64 borrowed
+
+ lwz @t[0],0($inp) # load input, aligned or not
+ lwz @t[1],4($inp)
+ ${UCMP}i $len,0 # done already?
+ lwz @t[2],8($inp)
+ lwz @t[3],12($inp)
+ xor @x[0],@x[0],@t[0] # xor with input
+ lwz @t[0],16($inp)
+ xor @x[1],@x[1],@t[1]
+ lwz @t[1],20($inp)
+ xor @x[2],@x[2],@t[2]
+ lwz @t[2],24($inp)
+ xor @x[3],@x[3],@t[3]
+ lwz @t[3],28($inp)
+ xor @x[4],@x[4],@t[0]
+ lwz @t[0],32($inp)
+ xor @x[5],@x[5],@t[1]
+ lwz @t[1],36($inp)
+ xor @x[6],@x[6],@t[2]
+ lwz @t[2],40($inp)
+ xor @x[7],@x[7],@t[3]
+ lwz @t[3],44($inp)
+ xor @x[8],@x[8],@t[0]
+ lwz @t[0],48($inp)
+ xor @x[9],@x[9],@t[1]
+ lwz @t[1],52($inp)
+ xor @x[10],@x[10],@t[2]
+ lwz @t[2],56($inp)
+ xor @x[11],@x[11],@t[3]
+ lwz @t[3],60($inp)
+ xor @x[12],@x[12],@t[0]
+ stw @x[0],0($out) # store output, aligned or not
+ xor @x[13],@x[13],@t[1]
+ stw @x[1],4($out)
+ xor @x[14],@x[14],@t[2]
+ stw @x[2],8($out)
+ xor @x[15],@x[15],@t[3]
+ stw @x[3],12($out)
+ stw @x[4],16($out)
+ stw @x[5],20($out)
+ stw @x[6],24($out)
+ stw @x[7],28($out)
+ stw @x[8],32($out)
+ stw @x[9],36($out)
+ stw @x[10],40($out)
+ stw @x[11],44($out)
+ stw @x[12],48($out)
+ stw @x[13],52($out)
+ stw @x[14],56($out)
+ addi $inp,$inp,64
+ stw @x[15],60($out)
+ addi $out,$out,64
+
+ bne Loop_outer
+
+ blr
+
+.align 4
+Ltail:
+ addi $len,$len,64 # restore tail length
+ subi $inp,$inp,1 # prepare for *++ptr
+ subi $out,$out,1
+ addi @t[0],$sp,$LOCALS-1
+ mtctr $len
+
+ stw @x[0],`$LOCALS+0`($sp) # save whole block to stack
+ stw @x[1],`$LOCALS+4`($sp)
+ stw @x[2],`$LOCALS+8`($sp)
+ stw @x[3],`$LOCALS+12`($sp)
+ stw @x[4],`$LOCALS+16`($sp)
+ stw @x[5],`$LOCALS+20`($sp)
+ stw @x[6],`$LOCALS+24`($sp)
+ stw @x[7],`$LOCALS+28`($sp)
+ stw @x[8],`$LOCALS+32`($sp)
+ stw @x[9],`$LOCALS+36`($sp)
+ stw @x[10],`$LOCALS+40`($sp)
+ stw @x[11],`$LOCALS+44`($sp)
+ stw @x[12],`$LOCALS+48`($sp)
+ stw @x[13],`$LOCALS+52`($sp)
+ stw @x[14],`$LOCALS+56`($sp)
+ stw @x[15],`$LOCALS+60`($sp)
+
+Loop_tail: # byte-by-byte loop
+ lbzu @d[0],1($inp)
+ lbzu @x[0],1(@t[0])
+ xor @d[1],@d[0],@x[0]
+ stbu @d[1],1($out)
+ bdnz Loop_tail
+
+ stw $sp,`$LOCALS+0`($sp) # wipe block on stack
+ stw $sp,`$LOCALS+4`($sp)
+ stw $sp,`$LOCALS+8`($sp)
+ stw $sp,`$LOCALS+12`($sp)
+ stw $sp,`$LOCALS+16`($sp)
+ stw $sp,`$LOCALS+20`($sp)
+ stw $sp,`$LOCALS+24`($sp)
+ stw $sp,`$LOCALS+28`($sp)
+ stw $sp,`$LOCALS+32`($sp)
+ stw $sp,`$LOCALS+36`($sp)
+ stw $sp,`$LOCALS+40`($sp)
+ stw $sp,`$LOCALS+44`($sp)
+ stw $sp,`$LOCALS+48`($sp)
+ stw $sp,`$LOCALS+52`($sp)
+ stw $sp,`$LOCALS+56`($sp)
+ stw $sp,`$LOCALS+60`($sp)
+
+ blr
+ .long 0
+ .byte 0,12,0x14,0,0,0,0,0
+___
+
+{{{
+my ($A0,$B0,$C0,$D0,$A1,$B1,$C1,$D1,$A2,$B2,$C2,$D2,$T0,$T1,$T2) =
+ map("v$_",(0..14));
+my (@K)=map("v$_",(15..20));
+my ($FOUR,$sixteen,$twenty4,$twenty,$twelve,$twenty5,$seven) =
+ map("v$_",(21..27));
+my ($inpperm,$outperm,$outmask) = map("v$_",(28..30));
+my @D=("v31",$seven,$T0,$T1,$T2);
+
+my $FRAME=$LOCALS+64+13*16+18*$SIZE_T; # 13*16 is for v20-v31 offload
+
+sub VMXROUND {
+my $odd = pop;
+my ($a,$b,$c,$d,$t)=@_;
+
+ (
+ "&vadduwm ('$a','$a','$b')",
+ "&vxor ('$d','$d','$a')",
+ "&vperm ('$d','$d','$d','$sixteen')",
+
+ "&vadduwm ('$c','$c','$d')",
+ "&vxor ('$t','$b','$c')",
+ "&vsrw ('$b','$t','$twenty')",
+ "&vslw ('$t','$t','$twelve')",
+ "&vor ('$b','$b','$t')",
+
+ "&vadduwm ('$a','$a','$b')",
+ "&vxor ('$d','$d','$a')",
+ "&vperm ('$d','$d','$d','$twenty4')",
+
+ "&vadduwm ('$c','$c','$d')",
+ "&vxor ('$t','$b','$c')",
+ "&vsrw ('$b','$t','$twenty5')",
+ "&vslw ('$t','$t','$seven')",
+ "&vor ('$b','$b','$t')",
+
+ "&vsldoi ('$c','$c','$c',8)",
+ "&vsldoi ('$b','$b','$b',$odd?4:12)",
+ "&vsldoi ('$d','$d','$d',$odd?12:4)"
+ );
+}
+
+$code.=<<___;
+
+.globl .ChaCha20_ctr32_vmx
+.align 5
+.ChaCha20_ctr32_vmx:
+ ${UCMP}i $len,256
+ blt __ChaCha20_ctr32_int
+
+ $STU $sp,-$FRAME($sp)
+ mflr r0
+ li r10,`15+$LOCALS+64`
+ li r11,`31+$LOCALS+64`
+ mfspr r12,256
+ stvx v20,r10,$sp
+ addi r10,r10,32
+ stvx v21,r11,$sp
+ addi r11,r11,32
+ stvx v22,r10,$sp
+ addi r10,r10,32
+ stvx v23,r11,$sp
+ addi r11,r11,32
+ stvx v24,r10,$sp
+ addi r10,r10,32
+ stvx v25,r11,$sp
+ addi r11,r11,32
+ stvx v26,r10,$sp
+ addi r10,r10,32
+ stvx v27,r11,$sp
+ addi r11,r11,32
+ stvx v28,r10,$sp
+ addi r10,r10,32
+ stvx v29,r11,$sp
+ addi r11,r11,32
+ stvx v30,r10,$sp
+ stvx v31,r11,$sp
+ stw r12,`$FRAME-$SIZE_T*18-4`($sp) # save vrsave
+ $PUSH r14,`$FRAME-$SIZE_T*18`($sp)
+ $PUSH r15,`$FRAME-$SIZE_T*17`($sp)
+ $PUSH r16,`$FRAME-$SIZE_T*16`($sp)
+ $PUSH r17,`$FRAME-$SIZE_T*15`($sp)
+ $PUSH r18,`$FRAME-$SIZE_T*14`($sp)
+ $PUSH r19,`$FRAME-$SIZE_T*13`($sp)
+ $PUSH r20,`$FRAME-$SIZE_T*12`($sp)
+ $PUSH r21,`$FRAME-$SIZE_T*11`($sp)
+ $PUSH r22,`$FRAME-$SIZE_T*10`($sp)
+ $PUSH r23,`$FRAME-$SIZE_T*9`($sp)
+ $PUSH r24,`$FRAME-$SIZE_T*8`($sp)
+ $PUSH r25,`$FRAME-$SIZE_T*7`($sp)
+ $PUSH r26,`$FRAME-$SIZE_T*6`($sp)
+ $PUSH r27,`$FRAME-$SIZE_T*5`($sp)
+ $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
+ $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
+ $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
+ $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
+ li r12,-1
+ $PUSH r0, `$FRAME+$LRSAVE`($sp)
+ mtspr 256,r12 # preserve all AltiVec registers
+
+ bl Lconsts # returns pointer Lsigma in r12
+ li @x[0],16
+ li @x[1],32
+ li @x[2],48
+ li @x[3],64
+ li @x[4],31 # 31 is not a typo
+ li @x[5],15 # nor is 15
+
+ lvx @K[1],0,$key # load key
+ ?lvsr $T0,0,$key # prepare unaligned load
+ lvx @K[2],@x[0],$key
+ lvx @D[0],@x[4],$key
+
+ lvx @K[3],0,$ctr # load counter
+ ?lvsr $T1,0,$ctr # prepare unaligned load
+ lvx @D[1],@x[5],$ctr
+
+ lvx @K[0],0,r12 # load constants
+ lvx @K[5],@x[0],r12 # one
+ lvx $FOUR,@x[1],r12
+ lvx $sixteen,@x[2],r12
+ lvx $twenty4,@x[3],r12
+
+ ?vperm @K[1],@K[2],@K[1],$T0 # align key
+ ?vperm @K[2],@D[0],@K[2],$T0
+ ?vperm @K[3],@D[1],@K[3],$T1 # align counter
+
+ lwz @d[0],0($ctr) # load counter to GPR
+ lwz @d[1],4($ctr)
+ vadduwm @K[3],@K[3],@K[5] # adjust AltiVec counter
+ lwz @d[2],8($ctr)
+ vadduwm @K[4],@K[3],@K[5]
+ lwz @d[3],12($ctr)
+ vadduwm @K[5],@K[4],@K[5]
+
+ vspltisw $twenty,-12 # synthesize constants
+ vspltisw $twelve,12
+ vspltisw $twenty5,-7
+ #vspltisw $seven,7 # synthesized in the loop
+
+ vxor $T0,$T0,$T0 # 0x00..00
+ vspltisw $outmask,-1 # 0xff..ff
+ ?lvsr $inpperm,0,$inp # prepare for unaligned load
+ ?lvsl $outperm,0,$out # prepare for unaligned store
+ ?vperm $outmask,$outmask,$T0,$outperm
+
+ be?lvsl $T0,0,@x[0] # 0x00..0f
+ be?vspltisb $T1,3 # 0x03..03
+ be?vxor $T0,$T0,$T1 # swap bytes within words
+ be?vxor $outperm,$outperm,$T1
+ be?vperm $inpperm,$inpperm,$inpperm,$T0
+
+ b Loop_outer_vmx
+
+.align 4
+Loop_outer_vmx:
+ lis @x[0],0x6170 # synthesize sigma
+ lis @x[1],0x3320
+ vmr $A0,@K[0]
+ lis @x[2],0x7962
+ lis @x[3],0x6b20
+ vmr $A1,@K[0]
+ ori @x[0],@x[0],0x7865
+ ori @x[1],@x[1],0x646e
+ vmr $A2,@K[0]
+ ori @x[2],@x[2],0x2d32
+ ori @x[3],@x[3],0x6574
+ vmr $B0,@K[1]
+
+ li r0,10 # inner loop counter
+ lwz @x[4],0($key) # load key to GPR
+ vmr $B1,@K[1]
+ lwz @x[5],4($key)
+ vmr $B2,@K[1]
+ lwz @x[6],8($key)
+ vmr $C0,@K[2]
+ lwz @x[7],12($key)
+ vmr $C1,@K[2]
+ lwz @x[8],16($key)
+ vmr $C2,@K[2]
+ mr @x[12],@d[0] # copy GPR counter
+ lwz @x[9],20($key)
+ vmr $D0,@K[3]
+ mr @x[13],@d[1]
+ lwz @x[10],24($key)
+ vmr $D1,@K[4]
+ mr @x[14],@d[2]
+ lwz @x[11],28($key)
+ vmr $D2,@K[5]
+ mr @x[15],@d[3]
+
+ mr @t[0],@x[4]
+ mr @t[1],@x[5]
+ mr @t[2],@x[6]
+ mr @t[3],@x[7]
+ vspltisw $seven,7
+
+ mtctr r0
+ nop
+Loop_vmx:
+___
+ my @thread0=&VMXROUND($A0,$B0,$C0,$D0,$T0,0);
+ my @thread1=&VMXROUND($A1,$B1,$C1,$D1,$T1,0);
+ my @thread2=&VMXROUND($A2,$B2,$C2,$D2,$T2,0);
+ my @thread3=&ROUND(0,4,8,12);
+
+ foreach (@thread0) {
+ eval; eval(shift(@thread3));
+ eval(shift(@thread1)); eval(shift(@thread3));
+ eval(shift(@thread2)); eval(shift(@thread3));
+ }
+
+ @thread0=&VMXROUND($A0,$B0,$C0,$D0,$T0,1);
+ @thread1=&VMXROUND($A1,$B1,$C1,$D1,$T1,1);
+ @thread2=&VMXROUND($A2,$B2,$C2,$D2,$T2,1);
+ @thread3=&ROUND(0,5,10,15);
+
+ foreach (@thread0) {
+ eval; eval(shift(@thread3));
+ eval(shift(@thread1)); eval(shift(@thread3));
+ eval(shift(@thread2)); eval(shift(@thread3));
+ }
+$code.=<<___;
+ bdnz Loop_vmx
+
+ subi $len,$len,256 # $len-=256
+ addi @x[0],@x[0],0x7865 # accumulate key block
+ addi @x[1],@x[1],0x646e
+ addi @x[2],@x[2],0x2d32
+ addi @x[3],@x[3],0x6574
+ addis @x[0],@x[0],0x6170
+ addis @x[1],@x[1],0x3320
+ addis @x[2],@x[2],0x7962
+ addis @x[3],@x[3],0x6b20
+ add @x[4],@x[4],@t[0]
+ lwz @t[0],16($key)
+ add @x[5],@x[5],@t[1]
+ lwz @t[1],20($key)
+ add @x[6],@x[6],@t[2]
+ lwz @t[2],24($key)
+ add @x[7],@x[7],@t[3]
+ lwz @t[3],28($key)
+ add @x[8],@x[8],@t[0]
+ add @x[9],@x[9],@t[1]
+ add @x[10],@x[10],@t[2]
+ add @x[11],@x[11],@t[3]
+ add @x[12],@x[12],@d[0]
+ add @x[13],@x[13],@d[1]
+ add @x[14],@x[14],@d[2]
+ add @x[15],@x[15],@d[3]
+
+ vadduwm $A0,$A0,@K[0] # accumulate key block
+ vadduwm $A1,$A1,@K[0]
+ vadduwm $A2,$A2,@K[0]
+ vadduwm $B0,$B0,@K[1]
+ vadduwm $B1,$B1,@K[1]
+ vadduwm $B2,$B2,@K[1]
+ vadduwm $C0,$C0,@K[2]
+ vadduwm $C1,$C1,@K[2]
+ vadduwm $C2,$C2,@K[2]
+ vadduwm $D0,$D0,@K[3]
+ vadduwm $D1,$D1,@K[4]
+ vadduwm $D2,$D2,@K[5]
+
+ addi @d[0],@d[0],4 # increment counter
+ vadduwm @K[3],@K[3],$FOUR
+ vadduwm @K[4],@K[4],$FOUR
+ vadduwm @K[5],@K[5],$FOUR
+
+___
+if (!$LITTLE_ENDIAN) { for($i=0;$i<16;$i++) { # flip byte order
+$code.=<<___;
+ mr @t[$i&3],@x[$i]
+ rotlwi @x[$i],@x[$i],8
+ rlwimi @x[$i],@t[$i&3],24,0,7
+ rlwimi @x[$i],@t[$i&3],24,16,23
+___
+} }
+$code.=<<___;
+ lwz @t[0],0($inp) # load input, aligned or not
+ lwz @t[1],4($inp)
+ lwz @t[2],8($inp)
+ lwz @t[3],12($inp)
+ xor @x[0],@x[0],@t[0] # xor with input
+ lwz @t[0],16($inp)
+ xor @x[1],@x[1],@t[1]
+ lwz @t[1],20($inp)
+ xor @x[2],@x[2],@t[2]
+ lwz @t[2],24($inp)
+ xor @x[3],@x[3],@t[3]
+ lwz @t[3],28($inp)
+ xor @x[4],@x[4],@t[0]
+ lwz @t[0],32($inp)
+ xor @x[5],@x[5],@t[1]
+ lwz @t[1],36($inp)
+ xor @x[6],@x[6],@t[2]
+ lwz @t[2],40($inp)
+ xor @x[7],@x[7],@t[3]
+ lwz @t[3],44($inp)
+ xor @x[8],@x[8],@t[0]
+ lwz @t[0],48($inp)
+ xor @x[9],@x[9],@t[1]
+ lwz @t[1],52($inp)
+ xor @x[10],@x[10],@t[2]
+ lwz @t[2],56($inp)
+ xor @x[11],@x[11],@t[3]
+ lwz @t[3],60($inp)
+ xor @x[12],@x[12],@t[0]
+ stw @x[0],0($out) # store output, aligned or not
+ xor @x[13],@x[13],@t[1]
+ stw @x[1],4($out)
+ xor @x[14],@x[14],@t[2]
+ stw @x[2],8($out)
+ xor @x[15],@x[15],@t[3]
+ stw @x[3],12($out)
+ addi $inp,$inp,64
+ stw @x[4],16($out)
+ li @t[0],16
+ stw @x[5],20($out)
+ li @t[1],32
+ stw @x[6],24($out)
+ li @t[2],48
+ stw @x[7],28($out)
+ li @t[3],64
+ stw @x[8],32($out)
+ stw @x[9],36($out)
+ stw @x[10],40($out)
+ stw @x[11],44($out)
+ stw @x[12],48($out)
+ stw @x[13],52($out)
+ stw @x[14],56($out)
+ stw @x[15],60($out)
+ addi $out,$out,64
+
+ lvx @D[0],0,$inp # load input
+ lvx @D[1],@t[0],$inp
+ lvx @D[2],@t[1],$inp
+ lvx @D[3],@t[2],$inp
+ lvx @D[4],@t[3],$inp
+ addi $inp,$inp,64
+
+ ?vperm @D[0],@D[1],@D[0],$inpperm # align input
+ ?vperm @D[1],@D[2],@D[1],$inpperm
+ ?vperm @D[2],@D[3],@D[2],$inpperm
+ ?vperm @D[3],@D[4],@D[3],$inpperm
+ vxor $A0,$A0,@D[0] # xor with input
+ vxor $B0,$B0,@D[1]
+ lvx @D[1],@t[0],$inp # keep loading input
+ vxor $C0,$C0,@D[2]
+ lvx @D[2],@t[1],$inp
+ vxor $D0,$D0,@D[3]
+ lvx @D[3],@t[2],$inp
+ lvx @D[0],@t[3],$inp
+ addi $inp,$inp,64
+ li @t[3],63 # 63 is not a typo
+ vperm $A0,$A0,$A0,$outperm # pre-misalign output
+ vperm $B0,$B0,$B0,$outperm
+ vperm $C0,$C0,$C0,$outperm
+ vperm $D0,$D0,$D0,$outperm
+
+ ?vperm @D[4],@D[1],@D[4],$inpperm # align input
+ ?vperm @D[1],@D[2],@D[1],$inpperm
+ ?vperm @D[2],@D[3],@D[2],$inpperm
+ ?vperm @D[3],@D[0],@D[3],$inpperm
+ vxor $A1,$A1,@D[4]
+ vxor $B1,$B1,@D[1]
+ lvx @D[1],@t[0],$inp # keep loading input
+ vxor $C1,$C1,@D[2]
+ lvx @D[2],@t[1],$inp
+ vxor $D1,$D1,@D[3]
+ lvx @D[3],@t[2],$inp
+ lvx @D[4],@t[3],$inp # redundant in aligned case
+ addi $inp,$inp,64
+ vperm $A1,$A1,$A1,$outperm # pre-misalign output
+ vperm $B1,$B1,$B1,$outperm
+ vperm $C1,$C1,$C1,$outperm
+ vperm $D1,$D1,$D1,$outperm
+
+ ?vperm @D[0],@D[1],@D[0],$inpperm # align input
+ ?vperm @D[1],@D[2],@D[1],$inpperm
+ ?vperm @D[2],@D[3],@D[2],$inpperm
+ ?vperm @D[3],@D[4],@D[3],$inpperm
+ vxor $A2,$A2,@D[0]
+ vxor $B2,$B2,@D[1]
+ vxor $C2,$C2,@D[2]
+ vxor $D2,$D2,@D[3]
+ vperm $A2,$A2,$A2,$outperm # pre-misalign output
+ vperm $B2,$B2,$B2,$outperm
+ vperm $C2,$C2,$C2,$outperm
+ vperm $D2,$D2,$D2,$outperm
+
+ andi. @x[1],$out,15 # is $out aligned?
+ mr @x[0],$out
+
+ vsel @D[0],$A0,$B0,$outmask # collect pre-misaligned output
+ vsel @D[1],$B0,$C0,$outmask
+ vsel @D[2],$C0,$D0,$outmask
+ vsel @D[3],$D0,$A1,$outmask
+ vsel $B0,$A1,$B1,$outmask
+ vsel $C0,$B1,$C1,$outmask
+ vsel $D0,$C1,$D1,$outmask
+ vsel $A1,$D1,$A2,$outmask
+ vsel $B1,$A2,$B2,$outmask
+ vsel $C1,$B2,$C2,$outmask
+ vsel $D1,$C2,$D2,$outmask
+
+ #stvx $A0,0,$out # take it easy on the edges
+ stvx @D[0],@t[0],$out # store output
+ stvx @D[1],@t[1],$out
+ stvx @D[2],@t[2],$out
+ addi $out,$out,64
+ stvx @D[3],0,$out
+ stvx $B0,@t[0],$out
+ stvx $C0,@t[1],$out
+ stvx $D0,@t[2],$out
+ addi $out,$out,64
+ stvx $A1,0,$out
+ stvx $B1,@t[0],$out
+ stvx $C1,@t[1],$out
+ stvx $D1,@t[2],$out
+ addi $out,$out,64
+
+ beq Laligned_vmx
+
+ sub @x[2],$out,@x[1] # in misaligned case edges
+ li @x[3],0 # are written byte-by-byte
+Lunaligned_tail_vmx:
+ stvebx $D2,@x[3],@x[2]
+ addi @x[3],@x[3],1
+ cmpw @x[3],@x[1]
+ bne Lunaligned_tail_vmx
+
+ sub @x[2],@x[0],@x[1]
+Lunaligned_head_vmx:
+ stvebx $A0,@x[1],@x[2]
+ cmpwi @x[1],15
+ addi @x[1],@x[1],1
+ bne Lunaligned_head_vmx
+
+ ${UCMP}i $len,255 # done with 256-byte blocks yet?
+ bgt Loop_outer_vmx
+
+ b Ldone_vmx
+
+.align 4
+Laligned_vmx:
+ stvx $A0,0,@x[0] # head hexaword was not stored
+
+ ${UCMP}i $len,255 # done with 256-byte blocks yet?
+ bgt Loop_outer_vmx
+ nop
+
+Ldone_vmx:
+ ${UCMP}i $len,0 # done yet?
+ bnel __ChaCha20_1x
+
+ lwz r12,`$FRAME-$SIZE_T*18-4`($sp) # pull vrsave
+ li r10,`15+$LOCALS+64`
+ li r11,`31+$LOCALS+64`
+ mtspr 256,r12 # restore vrsave
+ lvx v20,r10,$sp
+ addi r10,r10,32
+ lvx v21,r11,$sp
+ addi r11,r11,32
+ lvx v22,r10,$sp
+ addi r10,r10,32
+ lvx v23,r11,$sp
+ addi r11,r11,32
+ lvx v24,r10,$sp
+ addi r10,r10,32
+ lvx v25,r11,$sp
+ addi r11,r11,32
+ lvx v26,r10,$sp
+ addi r10,r10,32
+ lvx v27,r11,$sp
+ addi r11,r11,32
+ lvx v28,r10,$sp
+ addi r10,r10,32
+ lvx v29,r11,$sp
+ addi r11,r11,32
+ lvx v30,r10,$sp
+ lvx v31,r11,$sp
+ $POP r0, `$FRAME+$LRSAVE`($sp)
+ $POP r14,`$FRAME-$SIZE_T*18`($sp)
+ $POP r15,`$FRAME-$SIZE_T*17`($sp)
+ $POP r16,`$FRAME-$SIZE_T*16`($sp)
+ $POP r17,`$FRAME-$SIZE_T*15`($sp)
+ $POP r18,`$FRAME-$SIZE_T*14`($sp)
+ $POP r19,`$FRAME-$SIZE_T*13`($sp)
+ $POP r20,`$FRAME-$SIZE_T*12`($sp)
+ $POP r21,`$FRAME-$SIZE_T*11`($sp)
+ $POP r22,`$FRAME-$SIZE_T*10`($sp)
+ $POP r23,`$FRAME-$SIZE_T*9`($sp)
+ $POP r24,`$FRAME-$SIZE_T*8`($sp)
+ $POP r25,`$FRAME-$SIZE_T*7`($sp)
+ $POP r26,`$FRAME-$SIZE_T*6`($sp)
+ $POP r27,`$FRAME-$SIZE_T*5`($sp)
+ $POP r28,`$FRAME-$SIZE_T*4`($sp)
+ $POP r29,`$FRAME-$SIZE_T*3`($sp)
+ $POP r30,`$FRAME-$SIZE_T*2`($sp)
+ $POP r31,`$FRAME-$SIZE_T*1`($sp)
+ mtlr r0
+ addi $sp,$sp,$FRAME
+ blr
+ .long 0
+ .byte 0,12,0x04,1,0x80,18,5,0
+ .long 0
+.size .ChaCha20_ctr32_vmx,.-.ChaCha20_ctr32_vmx
+
+.align 5
+Lconsts:
+ mflr r0
+ bcl 20,31,\$+4
+ mflr r12 #vvvvv "distance between . and _vpaes_consts
+ addi r12,r12,`64-8`
+ mtlr r0
+ blr
+ .long 0
+ .byte 0,12,0x14,0,0,0,0,0
+ .space `64-9*4`
+Lsigma:
+ .long 0x61707865,0x3320646e,0x79622d32,0x6b206574
+ .long 1,0,0,0
+ .long 4,0,0,0
+___
+$code.=<<___ if ($LITTLE_ENDIAN);
+ .long 0x0e0f0c0d,0x0a0b0809,0x06070405,0x02030001
+ .long 0x0d0e0f0c,0x090a0b08,0x05060704,0x01020300
+___
+$code.=<<___ if (!$LITTLE_ENDIAN); # flipped words
+ .long 0x02030001,0x06070405,0x0a0b0809,0x0e0f0c0d
+ .long 0x01020300,0x05060704,0x090a0b08,0x0d0e0f0c
+___
+$code.=<<___;
+.asciz "ChaCha20 for PowerPC/AltiVec, CRYPTOGAMS by <appro\@openssl.org>"
+.align 2
+___
+}}}
+
+foreach (split("\n",$code)) {
+ s/\`([^\`]*)\`/eval $1/ge;
+
+ # instructions prefixed with '?' are endian-specific and need
+ # to be adjusted accordingly...
+ if ($flavour !~ /le$/) { # big-endian
+ s/be\?// or
+ s/le\?/#le#/ or
+ s/\?lvsr/lvsl/ or
+ s/\?lvsl/lvsr/ or
+ s/\?(vperm\s+v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+)/$1$3$2$4/ or
+ s/(vsldoi\s+v[0-9]+,\s*)(v[0-9]+,)\s*(v[0-9]+,\s*)([0-9]+)/$1$3$2 16-$4/;
+ } else { # little-endian
+ s/le\?// or
+ s/be\?/#be#/ or
+ s/\?([a-z]+)/$1/;
+ }
+
+ print $_,"\n";
+}
+
+close STDOUT;
projects / cassiopeia.git / blobdiff