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| #! /usr/bin/env perl
| # Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
| #
| # Licensed under the OpenSSL license (the "License"). You may not use
| # this file except in compliance with the License. You can obtain a copy
| # in the file LICENSE in the source distribution or at
| # https://www.openssl.org/source/license.html
|
| #
| # ====================================================================
| # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
| # project. The module is, however, dual licensed under OpenSSL and
| # CRYPTOGAMS licenses depending on where you obtain it. For further
| # details see http://www.openssl.org/~appro/cryptogams/.
| # ====================================================================
| #
| # This module implements Poly1305 hash for PowerPC FPU.
| #
| # June 2015
| #
| # Numbers are cycles per processed byte with poly1305_blocks alone,
| # and improvement coefficients relative to gcc-generated code.
| #
| # Freescale e300 9.78/+30%
| # PPC74x0 6.92/+50%
| # PPC970 6.03/+80%
| # POWER7 3.50/+30%
| # POWER8 3.75/+10%
|
| $flavour = shift;
|
| if ($flavour =~ /64/) {
| $SIZE_T =8;
| $LRSAVE =2*$SIZE_T;
| $UCMP ="cmpld";
| $STU ="stdu";
| $POP ="ld";
| $PUSH ="std";
| } elsif ($flavour =~ /32/) {
| $SIZE_T =4;
| $LRSAVE =$SIZE_T;
| $UCMP ="cmplw";
| $STU ="stwu";
| $POP ="lwz";
| $PUSH ="stw";
| } else { die "nonsense $flavour"; }
|
| $LITTLE_ENDIAN = ($flavour=~/le$/) ? 4 : 0;
|
| $LWXLE = $LITTLE_ENDIAN ? "lwzx" : "lwbrx";
|
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $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+6*8+18*8;
|
| my $sp="r1";
|
| my ($ctx,$inp,$len,$padbit) = map("r$_",(3..6));
| my ($in0,$in1,$in2,$in3,$i1,$i2,$i3) = map("r$_",(7..12,6));
|
| my ($h0lo,$h0hi,$h1lo,$h1hi,$h2lo,$h2hi,$h3lo,$h3hi,
| $two0,$two32,$two64,$two96,$two130,$five_two130,
| $r0lo,$r0hi,$r1lo,$r1hi,$r2lo,$r2hi,
| $s2lo,$s2hi,$s3lo,$s3hi,
| $c0lo,$c0hi,$c1lo,$c1hi,$c2lo,$c2hi,$c3lo,$c3hi) = map("f$_",(0..31));
| # borrowings
| my ($r3lo,$r3hi,$s1lo,$s1hi) = ($c0lo,$c0hi,$c1lo,$c1hi);
| my ($x0,$x1,$x2,$x3) = ($c2lo,$c2hi,$c3lo,$c3hi);
| my ($y0,$y1,$y2,$y3) = ($c3lo,$c3hi,$c1lo,$c1hi);
|
| $code.=<<___;
| .machine "any"
| .text
|
| .globl .poly1305_init_fpu
| .align 6
| .poly1305_init_fpu:
| $STU $sp,-$LOCALS($sp) # minimal frame
| mflr $padbit
| $PUSH $padbit,`$LOCALS+$LRSAVE`($sp)
|
| bl LPICmeup
|
| xor r0,r0,r0
| mtlr $padbit # restore lr
|
| lfd $two0,8*0($len) # load constants
| lfd $two32,8*1($len)
| lfd $two64,8*2($len)
| lfd $two96,8*3($len)
| lfd $two130,8*4($len)
| lfd $five_two130,8*5($len)
|
| stfd $two0,8*0($ctx) # initial hash value, biased 0
| stfd $two32,8*1($ctx)
| stfd $two64,8*2($ctx)
| stfd $two96,8*3($ctx)
|
| $UCMP $inp,r0
| beq- Lno_key
|
| lfd $h3lo,8*13($len) # new fpscr
| mffs $h3hi # old fpscr
|
| stfd $two0,8*4($ctx) # key "template"
| stfd $two32,8*5($ctx)
| stfd $two64,8*6($ctx)
| stfd $two96,8*7($ctx)
|
| li $in1,4
| li $in2,8
| li $in3,12
| $LWXLE $in0,0,$inp # load key
| $LWXLE $in1,$in1,$inp
| $LWXLE $in2,$in2,$inp
| $LWXLE $in3,$in3,$inp
|
| lis $i1,0xf000 # 0xf0000000
| ori $i2,$i1,3 # 0xf0000003
| andc $in0,$in0,$i1 # &=0x0fffffff
| andc $in1,$in1,$i2 # &=0x0ffffffc
| andc $in2,$in2,$i2
| andc $in3,$in3,$i2
|
| stw $in0,`8*4+(4^$LITTLE_ENDIAN)`($ctx) # fill "template"
| stw $in1,`8*5+(4^$LITTLE_ENDIAN)`($ctx)
| stw $in2,`8*6+(4^$LITTLE_ENDIAN)`($ctx)
| stw $in3,`8*7+(4^$LITTLE_ENDIAN)`($ctx)
|
| mtfsf 255,$h3lo # fpscr
| stfd $two0,8*18($ctx) # copy constants to context
| stfd $two32,8*19($ctx)
| stfd $two64,8*20($ctx)
| stfd $two96,8*21($ctx)
| stfd $two130,8*22($ctx)
| stfd $five_two130,8*23($ctx)
|
| lfd $h0lo,8*4($ctx) # load [biased] key
| lfd $h1lo,8*5($ctx)
| lfd $h2lo,8*6($ctx)
| lfd $h3lo,8*7($ctx)
|
| fsub $h0lo,$h0lo,$two0 # r0
| fsub $h1lo,$h1lo,$two32 # r1
| fsub $h2lo,$h2lo,$two64 # r2
| fsub $h3lo,$h3lo,$two96 # r3
|
| lfd $two0,8*6($len) # more constants
| lfd $two32,8*7($len)
| lfd $two64,8*8($len)
| lfd $two96,8*9($len)
|
| fmul $h1hi,$h1lo,$five_two130 # s1
| fmul $h2hi,$h2lo,$five_two130 # s2
| stfd $h3hi,8*15($ctx) # borrow slot for original fpscr
| fmul $h3hi,$h3lo,$five_two130 # s3
|
| fadd $h0hi,$h0lo,$two0
| stfd $h1hi,8*12($ctx) # put aside for now
| fadd $h1hi,$h1lo,$two32
| stfd $h2hi,8*13($ctx)
| fadd $h2hi,$h2lo,$two64
| stfd $h3hi,8*14($ctx)
| fadd $h3hi,$h3lo,$two96
|
| fsub $h0hi,$h0hi,$two0
| fsub $h1hi,$h1hi,$two32
| fsub $h2hi,$h2hi,$two64
| fsub $h3hi,$h3hi,$two96
|
| lfd $two0,8*10($len) # more constants
| lfd $two32,8*11($len)
| lfd $two64,8*12($len)
|
| fsub $h0lo,$h0lo,$h0hi
| fsub $h1lo,$h1lo,$h1hi
| fsub $h2lo,$h2lo,$h2hi
| fsub $h3lo,$h3lo,$h3hi
|
| stfd $h0hi,8*5($ctx) # r0hi
| stfd $h1hi,8*7($ctx) # r1hi
| stfd $h2hi,8*9($ctx) # r2hi
| stfd $h3hi,8*11($ctx) # r3hi
|
| stfd $h0lo,8*4($ctx) # r0lo
| stfd $h1lo,8*6($ctx) # r1lo
| stfd $h2lo,8*8($ctx) # r2lo
| stfd $h3lo,8*10($ctx) # r3lo
|
| lfd $h1lo,8*12($ctx) # s1
| lfd $h2lo,8*13($ctx) # s2
| lfd $h3lo,8*14($ctx) # s3
| lfd $h0lo,8*15($ctx) # pull original fpscr
|
| fadd $h1hi,$h1lo,$two0
| fadd $h2hi,$h2lo,$two32
| fadd $h3hi,$h3lo,$two64
|
| fsub $h1hi,$h1hi,$two0
| fsub $h2hi,$h2hi,$two32
| fsub $h3hi,$h3hi,$two64
|
| fsub $h1lo,$h1lo,$h1hi
| fsub $h2lo,$h2lo,$h2hi
| fsub $h3lo,$h3lo,$h3hi
|
| stfd $h1hi,8*13($ctx) # s1hi
| stfd $h2hi,8*15($ctx) # s2hi
| stfd $h3hi,8*17($ctx) # s3hi
|
| stfd $h1lo,8*12($ctx) # s1lo
| stfd $h2lo,8*14($ctx) # s2lo
| stfd $h3lo,8*16($ctx) # s3lo
|
| mtfsf 255,$h0lo # restore fpscr
| Lno_key:
| xor r3,r3,r3
| addi $sp,$sp,$LOCALS
| blr
| .long 0
| .byte 0,12,4,1,0x80,0,2,0
| .size .poly1305_init_fpu,.-.poly1305_init_fpu
|
| .globl .poly1305_blocks_fpu
| .align 4
| .poly1305_blocks_fpu:
| srwi. $len,$len,4
| beq- Labort
|
| $STU $sp,-$FRAME($sp)
| mflr r0
| stfd f14,`$FRAME-8*18`($sp)
| stfd f15,`$FRAME-8*17`($sp)
| stfd f16,`$FRAME-8*16`($sp)
| stfd f17,`$FRAME-8*15`($sp)
| stfd f18,`$FRAME-8*14`($sp)
| stfd f19,`$FRAME-8*13`($sp)
| stfd f20,`$FRAME-8*12`($sp)
| stfd f21,`$FRAME-8*11`($sp)
| stfd f22,`$FRAME-8*10`($sp)
| stfd f23,`$FRAME-8*9`($sp)
| stfd f24,`$FRAME-8*8`($sp)
| stfd f25,`$FRAME-8*7`($sp)
| stfd f26,`$FRAME-8*6`($sp)
| stfd f27,`$FRAME-8*5`($sp)
| stfd f28,`$FRAME-8*4`($sp)
| stfd f29,`$FRAME-8*3`($sp)
| stfd f30,`$FRAME-8*2`($sp)
| stfd f31,`$FRAME-8*1`($sp)
| $PUSH r0,`$FRAME+$LRSAVE`($sp)
|
| xor r0,r0,r0
| li $in3,1
| mtctr $len
| neg $len,$len
| stw r0,`$LOCALS+8*4+(0^$LITTLE_ENDIAN)`($sp)
| stw $in3,`$LOCALS+8*4+(4^$LITTLE_ENDIAN)`($sp)
|
| lfd $two0,8*18($ctx) # load constants
| lfd $two32,8*19($ctx)
| lfd $two64,8*20($ctx)
| lfd $two96,8*21($ctx)
| lfd $two130,8*22($ctx)
| lfd $five_two130,8*23($ctx)
|
| lfd $h0lo,8*0($ctx) # load [biased] hash value
| lfd $h1lo,8*1($ctx)
| lfd $h2lo,8*2($ctx)
| lfd $h3lo,8*3($ctx)
|
| stfd $two0,`$LOCALS+8*0`($sp) # input "template"
| oris $in3,$padbit,`(1023+52+96)<<4`
| stfd $two32,`$LOCALS+8*1`($sp)
| stfd $two64,`$LOCALS+8*2`($sp)
| stw $in3,`$LOCALS+8*3+(0^$LITTLE_ENDIAN)`($sp)
|
| li $i1,4
| li $i2,8
| li $i3,12
| $LWXLE $in0,0,$inp # load input
| $LWXLE $in1,$i1,$inp
| $LWXLE $in2,$i2,$inp
| $LWXLE $in3,$i3,$inp
| addi $inp,$inp,16
|
| stw $in0,`$LOCALS+8*0+(4^$LITTLE_ENDIAN)`($sp) # fill "template"
| stw $in1,`$LOCALS+8*1+(4^$LITTLE_ENDIAN)`($sp)
| stw $in2,`$LOCALS+8*2+(4^$LITTLE_ENDIAN)`($sp)
| stw $in3,`$LOCALS+8*3+(4^$LITTLE_ENDIAN)`($sp)
|
| mffs $x0 # original fpscr
| lfd $x1,`$LOCALS+8*4`($sp) # new fpscr
| lfd $r0lo,8*4($ctx) # load key
| lfd $r0hi,8*5($ctx)
| lfd $r1lo,8*6($ctx)
| lfd $r1hi,8*7($ctx)
| lfd $r2lo,8*8($ctx)
| lfd $r2hi,8*9($ctx)
| lfd $r3lo,8*10($ctx)
| lfd $r3hi,8*11($ctx)
| lfd $s1lo,8*12($ctx)
| lfd $s1hi,8*13($ctx)
| lfd $s2lo,8*14($ctx)
| lfd $s2hi,8*15($ctx)
| lfd $s3lo,8*16($ctx)
| lfd $s3hi,8*17($ctx)
|
| stfd $x0,`$LOCALS+8*4`($sp) # save original fpscr
| mtfsf 255,$x1
|
| addic $len,$len,1
| addze r0,r0
| slwi. r0,r0,4
| sub $inp,$inp,r0 # conditional rewind
|
| lfd $x0,`$LOCALS+8*0`($sp)
| lfd $x1,`$LOCALS+8*1`($sp)
| lfd $x2,`$LOCALS+8*2`($sp)
| lfd $x3,`$LOCALS+8*3`($sp)
|
| fsub $h0lo,$h0lo,$two0 # de-bias hash value
| $LWXLE $in0,0,$inp # modulo-scheduled input load
| fsub $h1lo,$h1lo,$two32
| $LWXLE $in1,$i1,$inp
| fsub $h2lo,$h2lo,$two64
| $LWXLE $in2,$i2,$inp
| fsub $h3lo,$h3lo,$two96
| $LWXLE $in3,$i3,$inp
|
| fsub $x0,$x0,$two0 # de-bias input
| addi $inp,$inp,16
| fsub $x1,$x1,$two32
| fsub $x2,$x2,$two64
| fsub $x3,$x3,$two96
|
| fadd $x0,$x0,$h0lo # accumulate input
| stw $in0,`$LOCALS+8*0+(4^$LITTLE_ENDIAN)`($sp)
| fadd $x1,$x1,$h1lo
| stw $in1,`$LOCALS+8*1+(4^$LITTLE_ENDIAN)`($sp)
| fadd $x2,$x2,$h2lo
| stw $in2,`$LOCALS+8*2+(4^$LITTLE_ENDIAN)`($sp)
| fadd $x3,$x3,$h3lo
| stw $in3,`$LOCALS+8*3+(4^$LITTLE_ENDIAN)`($sp)
|
| b Lentry
|
| .align 4
| Loop:
| fsub $y0,$y0,$two0 # de-bias input
| addic $len,$len,1
| fsub $y1,$y1,$two32
| addze r0,r0
| fsub $y2,$y2,$two64
| slwi. r0,r0,4
| fsub $y3,$y3,$two96
| sub $inp,$inp,r0 # conditional rewind
|
| fadd $h0lo,$h0lo,$y0 # accumulate input
| fadd $h0hi,$h0hi,$y1
| fadd $h2lo,$h2lo,$y2
| fadd $h2hi,$h2hi,$y3
|
| ######################################### base 2^48 -> base 2^32
| fadd $c1lo,$h1lo,$two64
| $LWXLE $in0,0,$inp # modulo-scheduled input load
| fadd $c1hi,$h1hi,$two64
| $LWXLE $in1,$i1,$inp
| fadd $c3lo,$h3lo,$two130
| $LWXLE $in2,$i2,$inp
| fadd $c3hi,$h3hi,$two130
| $LWXLE $in3,$i3,$inp
| fadd $c0lo,$h0lo,$two32
| addi $inp,$inp,16
| fadd $c0hi,$h0hi,$two32
| fadd $c2lo,$h2lo,$two96
| fadd $c2hi,$h2hi,$two96
|
| fsub $c1lo,$c1lo,$two64
| stw $in0,`$LOCALS+8*0+(4^$LITTLE_ENDIAN)`($sp) # fill "template"
| fsub $c1hi,$c1hi,$two64
| stw $in1,`$LOCALS+8*1+(4^$LITTLE_ENDIAN)`($sp)
| fsub $c3lo,$c3lo,$two130
| stw $in2,`$LOCALS+8*2+(4^$LITTLE_ENDIAN)`($sp)
| fsub $c3hi,$c3hi,$two130
| stw $in3,`$LOCALS+8*3+(4^$LITTLE_ENDIAN)`($sp)
| fsub $c0lo,$c0lo,$two32
| fsub $c0hi,$c0hi,$two32
| fsub $c2lo,$c2lo,$two96
| fsub $c2hi,$c2hi,$two96
|
| fsub $h1lo,$h1lo,$c1lo
| fsub $h1hi,$h1hi,$c1hi
| fsub $h3lo,$h3lo,$c3lo
| fsub $h3hi,$h3hi,$c3hi
| fsub $h2lo,$h2lo,$c2lo
| fsub $h2hi,$h2hi,$c2hi
| fsub $h0lo,$h0lo,$c0lo
| fsub $h0hi,$h0hi,$c0hi
|
| fadd $h1lo,$h1lo,$c0lo
| fadd $h1hi,$h1hi,$c0hi
| fadd $h3lo,$h3lo,$c2lo
| fadd $h3hi,$h3hi,$c2hi
| fadd $h2lo,$h2lo,$c1lo
| fadd $h2hi,$h2hi,$c1hi
| fmadd $h0lo,$c3lo,$five_two130,$h0lo
| fmadd $h0hi,$c3hi,$five_two130,$h0hi
|
| fadd $x1,$h1lo,$h1hi
| lfd $s1lo,8*12($ctx) # reload constants
| fadd $x3,$h3lo,$h3hi
| lfd $s1hi,8*13($ctx)
| fadd $x2,$h2lo,$h2hi
| lfd $r3lo,8*10($ctx)
| fadd $x0,$h0lo,$h0hi
| lfd $r3hi,8*11($ctx)
| Lentry:
| fmul $h0lo,$s3lo,$x1
| fmul $h0hi,$s3hi,$x1
| fmul $h2lo,$r1lo,$x1
| fmul $h2hi,$r1hi,$x1
| fmul $h1lo,$r0lo,$x1
| fmul $h1hi,$r0hi,$x1
| fmul $h3lo,$r2lo,$x1
| fmul $h3hi,$r2hi,$x1
|
| fmadd $h0lo,$s1lo,$x3,$h0lo
| fmadd $h0hi,$s1hi,$x3,$h0hi
| fmadd $h2lo,$s3lo,$x3,$h2lo
| fmadd $h2hi,$s3hi,$x3,$h2hi
| fmadd $h1lo,$s2lo,$x3,$h1lo
| fmadd $h1hi,$s2hi,$x3,$h1hi
| fmadd $h3lo,$r0lo,$x3,$h3lo
| fmadd $h3hi,$r0hi,$x3,$h3hi
|
| fmadd $h0lo,$s2lo,$x2,$h0lo
| fmadd $h0hi,$s2hi,$x2,$h0hi
| fmadd $h2lo,$r0lo,$x2,$h2lo
| fmadd $h2hi,$r0hi,$x2,$h2hi
| fmadd $h1lo,$s3lo,$x2,$h1lo
| fmadd $h1hi,$s3hi,$x2,$h1hi
| fmadd $h3lo,$r1lo,$x2,$h3lo
| fmadd $h3hi,$r1hi,$x2,$h3hi
|
| fmadd $h0lo,$r0lo,$x0,$h0lo
| lfd $y0,`$LOCALS+8*0`($sp) # load [biased] input
| fmadd $h0hi,$r0hi,$x0,$h0hi
| lfd $y1,`$LOCALS+8*1`($sp)
| fmadd $h2lo,$r2lo,$x0,$h2lo
| lfd $y2,`$LOCALS+8*2`($sp)
| fmadd $h2hi,$r2hi,$x0,$h2hi
| lfd $y3,`$LOCALS+8*3`($sp)
| fmadd $h1lo,$r1lo,$x0,$h1lo
| fmadd $h1hi,$r1hi,$x0,$h1hi
| fmadd $h3lo,$r3lo,$x0,$h3lo
| fmadd $h3hi,$r3hi,$x0,$h3hi
|
| bdnz Loop
|
| ######################################### base 2^48 -> base 2^32
| fadd $c0lo,$h0lo,$two32
| fadd $c0hi,$h0hi,$two32
| fadd $c2lo,$h2lo,$two96
| fadd $c2hi,$h2hi,$two96
| fadd $c1lo,$h1lo,$two64
| fadd $c1hi,$h1hi,$two64
| fadd $c3lo,$h3lo,$two130
| fadd $c3hi,$h3hi,$two130
|
| fsub $c0lo,$c0lo,$two32
| fsub $c0hi,$c0hi,$two32
| fsub $c2lo,$c2lo,$two96
| fsub $c2hi,$c2hi,$two96
| fsub $c1lo,$c1lo,$two64
| fsub $c1hi,$c1hi,$two64
| fsub $c3lo,$c3lo,$two130
| fsub $c3hi,$c3hi,$two130
|
| fsub $h1lo,$h1lo,$c1lo
| fsub $h1hi,$h1hi,$c1hi
| fsub $h3lo,$h3lo,$c3lo
| fsub $h3hi,$h3hi,$c3hi
| fsub $h2lo,$h2lo,$c2lo
| fsub $h2hi,$h2hi,$c2hi
| fsub $h0lo,$h0lo,$c0lo
| fsub $h0hi,$h0hi,$c0hi
|
| fadd $h1lo,$h1lo,$c0lo
| fadd $h1hi,$h1hi,$c0hi
| fadd $h3lo,$h3lo,$c2lo
| fadd $h3hi,$h3hi,$c2hi
| fadd $h2lo,$h2lo,$c1lo
| fadd $h2hi,$h2hi,$c1hi
| fmadd $h0lo,$c3lo,$five_two130,$h0lo
| fmadd $h0hi,$c3hi,$five_two130,$h0hi
|
| fadd $x1,$h1lo,$h1hi
| fadd $x3,$h3lo,$h3hi
| fadd $x2,$h2lo,$h2hi
| fadd $x0,$h0lo,$h0hi
|
| lfd $h0lo,`$LOCALS+8*4`($sp) # pull saved fpscr
| fadd $x1,$x1,$two32 # bias
| fadd $x3,$x3,$two96
| fadd $x2,$x2,$two64
| fadd $x0,$x0,$two0
|
| stfd $x1,8*1($ctx) # store [biased] hash value
| stfd $x3,8*3($ctx)
| stfd $x2,8*2($ctx)
| stfd $x0,8*0($ctx)
|
| mtfsf 255,$h0lo # restore original fpscr
| lfd f14,`$FRAME-8*18`($sp)
| lfd f15,`$FRAME-8*17`($sp)
| lfd f16,`$FRAME-8*16`($sp)
| lfd f17,`$FRAME-8*15`($sp)
| lfd f18,`$FRAME-8*14`($sp)
| lfd f19,`$FRAME-8*13`($sp)
| lfd f20,`$FRAME-8*12`($sp)
| lfd f21,`$FRAME-8*11`($sp)
| lfd f22,`$FRAME-8*10`($sp)
| lfd f23,`$FRAME-8*9`($sp)
| lfd f24,`$FRAME-8*8`($sp)
| lfd f25,`$FRAME-8*7`($sp)
| lfd f26,`$FRAME-8*6`($sp)
| lfd f27,`$FRAME-8*5`($sp)
| lfd f28,`$FRAME-8*4`($sp)
| lfd f29,`$FRAME-8*3`($sp)
| lfd f30,`$FRAME-8*2`($sp)
| lfd f31,`$FRAME-8*1`($sp)
| addi $sp,$sp,$FRAME
| Labort:
| blr
| .long 0
| .byte 0,12,4,1,0x80,0,4,0
| .size .poly1305_blocks_fpu,.-.poly1305_blocks_fpu
| ___
| {
| my ($mac,$nonce)=($inp,$len);
|
| my ($h0,$h1,$h2,$h3,$h4, $d0,$d1,$d2,$d3
| ) = map("r$_",(7..11,28..31));
| my $mask = "r0";
| my $FRAME = (6+4)*$SIZE_T;
|
| $code.=<<___;
| .globl .poly1305_emit_fpu
| .align 4
| .poly1305_emit_fpu:
| $STU $sp,-$FRAME($sp)
| mflr r0
| $PUSH r28,`$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 $d0,`8*0+(0^$LITTLE_ENDIAN)`($ctx) # load hash
| lwz $h0,`8*0+(4^$LITTLE_ENDIAN)`($ctx)
| lwz $d1,`8*1+(0^$LITTLE_ENDIAN)`($ctx)
| lwz $h1,`8*1+(4^$LITTLE_ENDIAN)`($ctx)
| lwz $d2,`8*2+(0^$LITTLE_ENDIAN)`($ctx)
| lwz $h2,`8*2+(4^$LITTLE_ENDIAN)`($ctx)
| lwz $d3,`8*3+(0^$LITTLE_ENDIAN)`($ctx)
| lwz $h3,`8*3+(4^$LITTLE_ENDIAN)`($ctx)
|
| lis $mask,0xfff0
| andc $d0,$d0,$mask # mask exponent
| andc $d1,$d1,$mask
| andc $d2,$d2,$mask
| andc $d3,$d3,$mask # can be partially reduced...
| li $mask,3
|
| srwi $padbit,$d3,2 # ... so reduce
| and $h4,$d3,$mask
| andc $d3,$d3,$mask
| add $d3,$d3,$padbit
| ___
| if ($SIZE_T==4) {
| $code.=<<___;
| addc $h0,$h0,$d3
| adde $h1,$h1,$d0
| adde $h2,$h2,$d1
| adde $h3,$h3,$d2
| addze $h4,$h4
|
| addic $d0,$h0,5 # compare to modulus
| addze $d1,$h1
| addze $d2,$h2
| addze $d3,$h3
| addze $mask,$h4
|
| srwi $mask,$mask,2 # did it carry/borrow?
| neg $mask,$mask
| srawi $mask,$mask,31 # mask
|
| andc $h0,$h0,$mask
| and $d0,$d0,$mask
| andc $h1,$h1,$mask
| and $d1,$d1,$mask
| or $h0,$h0,$d0
| lwz $d0,0($nonce) # load nonce
| andc $h2,$h2,$mask
| and $d2,$d2,$mask
| or $h1,$h1,$d1
| lwz $d1,4($nonce)
| andc $h3,$h3,$mask
| and $d3,$d3,$mask
| or $h2,$h2,$d2
| lwz $d2,8($nonce)
| or $h3,$h3,$d3
| lwz $d3,12($nonce)
|
| addc $h0,$h0,$d0 # accumulate nonce
| adde $h1,$h1,$d1
| adde $h2,$h2,$d2
| adde $h3,$h3,$d3
| ___
| } else {
| $code.=<<___;
| add $h0,$h0,$d3
| add $h1,$h1,$d0
| add $h2,$h2,$d1
| add $h3,$h3,$d2
|
| srdi $d0,$h0,32
| add $h1,$h1,$d0
| srdi $d1,$h1,32
| add $h2,$h2,$d1
| srdi $d2,$h2,32
| add $h3,$h3,$d2
| srdi $d3,$h3,32
| add $h4,$h4,$d3
|
| insrdi $h0,$h1,32,0
| insrdi $h2,$h3,32,0
|
| addic $d0,$h0,5 # compare to modulus
| addze $d1,$h2
| addze $d2,$h4
|
| srdi $mask,$d2,2 # did it carry/borrow?
| neg $mask,$mask
| sradi $mask,$mask,63 # mask
| ld $d2,0($nonce) # load nonce
| ld $d3,8($nonce)
|
| andc $h0,$h0,$mask
| and $d0,$d0,$mask
| andc $h2,$h2,$mask
| and $d1,$d1,$mask
| or $h0,$h0,$d0
| or $h2,$h2,$d1
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| rotldi $d2,$d2,32 # flip nonce words
| rotldi $d3,$d3,32
| ___
| $code.=<<___;
| addc $h0,$h0,$d2 # accumulate nonce
| adde $h2,$h2,$d3
|
| srdi $h1,$h0,32
| srdi $h3,$h2,32
| ___
| }
| $code.=<<___ if ($LITTLE_ENDIAN);
| stw $h0,0($mac) # write result
| stw $h1,4($mac)
| stw $h2,8($mac)
| stw $h3,12($mac)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $d1,4
| stwbrx $h0,0,$mac # write result
| li $d2,8
| stwbrx $h1,$d1,$mac
| li $d3,12
| stwbrx $h2,$d2,$mac
| stwbrx $h3,$d3,$mac
| ___
| $code.=<<___;
| $POP r28,`$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)
| addi $sp,$sp,$FRAME
| blr
| .long 0
| .byte 0,12,4,1,0x80,4,3,0
| .size .poly1305_emit_fpu,.-.poly1305_emit_fpu
| ___
| }
| # Ugly hack here, because PPC assembler syntax seem to vary too
| # much from platforms to platform...
| $code.=<<___;
| .align 6
| LPICmeup:
| mflr r0
| bcl 20,31,\$+4
| mflr $len # vvvvvv "distance" between . and 1st data entry
| addi $len,$len,`64-8` # borrow $len
| mtlr r0
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,0,0
| .space `64-9*4`
|
| .quad 0x4330000000000000 # 2^(52+0)
| .quad 0x4530000000000000 # 2^(52+32)
| .quad 0x4730000000000000 # 2^(52+64)
| .quad 0x4930000000000000 # 2^(52+96)
| .quad 0x4b50000000000000 # 2^(52+130)
|
| .quad 0x37f4000000000000 # 5/2^130
|
| .quad 0x4430000000000000 # 2^(52+16+0)
| .quad 0x4630000000000000 # 2^(52+16+32)
| .quad 0x4830000000000000 # 2^(52+16+64)
| .quad 0x4a30000000000000 # 2^(52+16+96)
| .quad 0x3e30000000000000 # 2^(52+16+0-96)
| .quad 0x4030000000000000 # 2^(52+16+32-96)
| .quad 0x4230000000000000 # 2^(52+16+64-96)
|
| .quad 0x0000000000000001 # fpscr: truncate, no exceptions
| .asciz "Poly1305 for PPC FPU, CRYPTOGAMS by <appro\@openssl.org>"
| .align 4
| ___
|
| $code =~ s/\`([^\`]*)\`/eval $1/gem;
| print $code;
| close STDOUT or die "error closing STDOUT: $!";
|
|
