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#!/usr/bin/env perl |
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# |
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# ==================================================================== |
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# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL |
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# project. The module is, however, dual licensed under OpenSSL and |
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# CRYPTOGAMS licenses depending on where you obtain it. For further |
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# details see http://www.openssl.org/~appro/cryptogams/. |
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# ==================================================================== |
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# |
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# This module implements Poly1305 hash for ARMv8. |
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# |
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# June 2015 |
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# |
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# Numbers are cycles per processed byte with poly1305_blocks alone. |
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# |
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# IALU/gcc-4.9 NEON |
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# |
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# Apple A7 1.86/+5% 0.72 |
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# Cortex-A53 2.63/+58% 1.47 |
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# Cortex-A57 2.70/+7% 1.14 |
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# Denver 1.39/+50% 1.18(*) |
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# X-Gene 2.00/+68% 2.19 |
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# |
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# (*) estimate based on resources availability is less than 1.0, |
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# i.e. measured result is worse than expected, presumably binary |
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# translator is not almighty; |
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$flavour=shift; |
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$output=shift; |
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; |
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( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or |
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( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or |
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die "can't locate arm-xlate.pl"; |
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open OUT,"| \"$^X\" $xlate $flavour $output"; |
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*STDOUT=*OUT; |
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my ($ctx,$inp,$len,$padbit) = map("x$_",(0..3)); |
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my ($mac,$nonce)=($inp,$len); |
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my ($h0,$h1,$h2,$r0,$r1,$s1,$t0,$t1,$d0,$d1,$d2) = map("x$_",(4..14)); |
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$code.=<<___; |
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#include "arm_arch.h" |
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.text |
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// forward "declarations" are required for Apple |
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.extern OPENSSL_armcap_P |
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.globl poly1305_blocks |
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.globl poly1305_emit |
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.globl poly1305_init |
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.type poly1305_init,%function |
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.align 5 |
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poly1305_init: |
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cmp $inp,xzr |
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stp xzr,xzr,[$ctx] // zero hash value |
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stp xzr,xzr,[$ctx,#16] // [along with is_base2_26] |
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csel x0,xzr,x0,eq |
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b.eq .Lno_key |
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#ifdef __ILP32__ |
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ldrsw $t1,.LOPENSSL_armcap_P |
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#else |
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ldr $t1,.LOPENSSL_armcap_P |
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#endif |
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adr $t0,.LOPENSSL_armcap_P |
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ldp $r0,$r1,[$inp] // load key |
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mov $s1,#0xfffffffc0fffffff |
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movk $s1,#0x0fff,lsl#48 |
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ldr w17,[$t0,$t1] |
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#ifdef __ARMEB__ |
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rev $r0,$r0 // flip bytes |
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rev $r1,$r1 |
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#endif |
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and $r0,$r0,$s1 // &=0ffffffc0fffffff |
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and $s1,$s1,#-4 |
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and $r1,$r1,$s1 // &=0ffffffc0ffffffc |
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stp $r0,$r1,[$ctx,#32] // save key value |
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tst w17,#ARMV7_NEON |
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adr $d0,poly1305_blocks |
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adr $r0,poly1305_blocks_neon |
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adr $d1,poly1305_emit |
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adr $r1,poly1305_emit_neon |
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csel $d0,$d0,$r0,eq |
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csel $d1,$d1,$r1,eq |
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stp $d0,$d1,[$len] |
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mov x0,#1 |
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.Lno_key: |
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ret |
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.size poly1305_init,.-poly1305_init |
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.type poly1305_blocks,%function |
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.align 5 |
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poly1305_blocks: |
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ands $len,$len,#-16 |
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b.eq .Lno_data |
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ldp $h0,$h1,[$ctx] // load hash value |
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ldp $r0,$r1,[$ctx,#32] // load key value |
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ldr $h2,[$ctx,#16] |
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add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) |
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b .Loop |
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.align 5 |
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.Loop: |
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ldp $t0,$t1,[$inp],#16 // load input |
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sub $len,$len,#16 |
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#ifdef __ARMEB__ |
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rev $t0,$t0 |
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rev $t1,$t1 |
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#endif |
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adds $h0,$h0,$t0 // accumulate input |
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adcs $h1,$h1,$t1 |
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mul $d0,$h0,$r0 // h0*r0 |
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adc $h2,$h2,$padbit |
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umulh $d1,$h0,$r0 |
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mul $t0,$h1,$s1 // h1*5*r1 |
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umulh $t1,$h1,$s1 |
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adds $d0,$d0,$t0 |
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mul $t0,$h0,$r1 // h0*r1 |
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adc $d1,$d1,$t1 |
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umulh $d2,$h0,$r1 |
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adds $d1,$d1,$t0 |
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mul $t0,$h1,$r0 // h1*r0 |
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adc $d2,$d2,xzr |
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umulh $t1,$h1,$r0 |
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adds $d1,$d1,$t0 |
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mul $t0,$h2,$s1 // h2*5*r1 |
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adc $d2,$d2,$t1 |
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mul $t1,$h2,$r0 // h2*r0 |
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adds $d1,$d1,$t0 |
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adc $d2,$d2,$t1 |
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and $t0,$d2,#-4 // final reduction |
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and $h2,$d2,#3 |
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add $t0,$t0,$d2,lsr#2 |
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adds $h0,$d0,$t0 |
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adc $h1,$d1,xzr |
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cbnz $len,.Loop |
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stp $h0,$h1,[$ctx] // store hash value |
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str $h2,[$ctx,#16] |
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.Lno_data: |
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ret |
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.size poly1305_blocks,.-poly1305_blocks |
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.type poly1305_emit,%function |
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.align 5 |
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poly1305_emit: |
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ldp $h0,$h1,[$ctx] // load hash base 2^64 |
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ldr $h2,[$ctx,#16] |
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ldp $t0,$t1,[$nonce] // load nonce |
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adds $d0,$h0,#5 // compare to modulus |
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adcs $d1,$h1,xzr |
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adc $d2,$h2,xzr |
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tst $d2,#-4 // see if it's carried/borrowed |
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csel $h0,$h0,$d0,eq |
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csel $h1,$h1,$d1,eq |
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#ifdef __ARMEB__ |
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ror $t0,$t0,#32 // flip nonce words |
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ror $t1,$t1,#32 |
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#endif |
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adds $h0,$h0,$t0 // accumulate nonce |
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adc $h1,$h1,$t1 |
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#ifdef __ARMEB__ |
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rev $h0,$h0 // flip output bytes |
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rev $h1,$h1 |
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#endif |
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stp $h0,$h1,[$mac] // write result |
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ret |
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.size poly1305_emit,.-poly1305_emit |
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___ |
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my ($R0,$R1,$S1,$R2,$S2,$R3,$S3,$R4,$S4) = map("v$_.4s",(0..8)); |
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my ($IN01_0,$IN01_1,$IN01_2,$IN01_3,$IN01_4) = map("v$_.2s",(9..13)); |
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my ($IN23_0,$IN23_1,$IN23_2,$IN23_3,$IN23_4) = map("v$_.2s",(14..18)); |
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my ($ACC0,$ACC1,$ACC2,$ACC3,$ACC4) = map("v$_.2d",(19..23)); |
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my ($H0,$H1,$H2,$H3,$H4) = map("v$_.2s",(24..28)); |
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my ($T0,$T1,$MASK) = map("v$_",(29..31)); |
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my ($in2,$zeros)=("x16","x17"); |
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my $is_base2_26 = $zeros; # borrow |
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$code.=<<___; |
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.type poly1305_mult,%function |
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.align 5 |
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poly1305_mult: |
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mul $d0,$h0,$r0 // h0*r0 |
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umulh $d1,$h0,$r0 |
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mul $t0,$h1,$s1 // h1*5*r1 |
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umulh $t1,$h1,$s1 |
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adds $d0,$d0,$t0 |
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mul $t0,$h0,$r1 // h0*r1 |
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adc $d1,$d1,$t1 |
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umulh $d2,$h0,$r1 |
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adds $d1,$d1,$t0 |
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mul $t0,$h1,$r0 // h1*r0 |
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adc $d2,$d2,xzr |
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umulh $t1,$h1,$r0 |
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adds $d1,$d1,$t0 |
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mul $t0,$h2,$s1 // h2*5*r1 |
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adc $d2,$d2,$t1 |
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mul $t1,$h2,$r0 // h2*r0 |
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adds $d1,$d1,$t0 |
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adc $d2,$d2,$t1 |
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and $t0,$d2,#-4 // final reduction |
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and $h2,$d2,#3 |
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add $t0,$t0,$d2,lsr#2 |
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adds $h0,$d0,$t0 |
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adc $h1,$d1,xzr |
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ret |
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.size poly1305_mult,.-poly1305_mult |
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.type poly1305_splat,%function |
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.align 5 |
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poly1305_splat: |
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and x12,$h0,#0x03ffffff // base 2^64 -> base 2^26 |
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ubfx x13,$h0,#26,#26 |
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extr x14,$h1,$h0,#52 |
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and x14,x14,#0x03ffffff |
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ubfx x15,$h1,#14,#26 |
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extr x16,$h2,$h1,#40 |
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str w12,[$ctx,#16*0] // r0 |
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add w12,w13,w13,lsl#2 // r1*5 |
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str w13,[$ctx,#16*1] // r1 |
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add w13,w14,w14,lsl#2 // r2*5 |
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str w12,[$ctx,#16*2] // s1 |
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str w14,[$ctx,#16*3] // r2 |
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add w14,w15,w15,lsl#2 // r3*5 |
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str w13,[$ctx,#16*4] // s2 |
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str w15,[$ctx,#16*5] // r3 |
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add w15,w16,w16,lsl#2 // r4*5 |
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str w14,[$ctx,#16*6] // s3 |
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str w16,[$ctx,#16*7] // r4 |
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str w15,[$ctx,#16*8] // s4 |
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ret |
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.size poly1305_splat,.-poly1305_splat |
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.type poly1305_blocks_neon,%function |
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.align 5 |
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poly1305_blocks_neon: |
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ldr $is_base2_26,[$ctx,#24] |
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cmp $len,#128 |
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b.hs .Lblocks_neon |
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cbz $is_base2_26,poly1305_blocks |
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.Lblocks_neon: |
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stp x29,x30,[sp,#-80]! |
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add x29,sp,#0 |
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ands $len,$len,#-16 |
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b.eq .Lno_data_neon |
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cbz $is_base2_26,.Lbase2_64_neon |
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ldp w10,w11,[$ctx] // load hash value base 2^26 |
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ldp w12,w13,[$ctx,#8] |
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ldr w14,[$ctx,#16] |
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tst $len,#31 |
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b.eq .Leven_neon |
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ldp $r0,$r1,[$ctx,#32] // load key value |
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add $h0,x10,x11,lsl#26 // base 2^26 -> base 2^64 |
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lsr $h1,x12,#12 |
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adds $h0,$h0,x12,lsl#52 |
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add $h1,$h1,x13,lsl#14 |
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adc $h1,$h1,xzr |
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lsr $h2,x14,#24 |
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adds $h1,$h1,x14,lsl#40 |
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adc $d2,$h2,xzr // can be partially reduced... |
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ldp $d0,$d1,[$inp],#16 // load input |
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sub $len,$len,#16 |
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add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) |
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and $t0,$d2,#-4 // ... so reduce |
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and $h2,$d2,#3 |
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add $t0,$t0,$d2,lsr#2 |
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adds $h0,$h0,$t0 |
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adc $h1,$h1,xzr |
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#ifdef __ARMEB__ |
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rev $d0,$d0 |
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rev $d1,$d1 |
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#endif |
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adds $h0,$h0,$d0 // accumulate input |
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adcs $h1,$h1,$d1 |
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adc $h2,$h2,$padbit |
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bl poly1305_mult |
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ldr x30,[sp,#8] |
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cbz $padbit,.Lstore_base2_64_neon |
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and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26 |
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ubfx x11,$h0,#26,#26 |
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extr x12,$h1,$h0,#52 |
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and x12,x12,#0x03ffffff |
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ubfx x13,$h1,#14,#26 |
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extr x14,$h2,$h1,#40 |
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cbnz $len,.Leven_neon |
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stp w10,w11,[$ctx] // store hash value base 2^26 |
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stp w12,w13,[$ctx,#8] |
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str w14,[$ctx,#16] |
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b .Lno_data_neon |
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.align 4 |
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.Lstore_base2_64_neon: |
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stp $h0,$h1,[$ctx] // store hash value base 2^64 |
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stp $h2,xzr,[$ctx,#16] // note that is_base2_26 is zeroed |
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b .Lno_data_neon |
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.align 4 |
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.Lbase2_64_neon: |
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ldp $r0,$r1,[$ctx,#32] // load key value |
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ldp $h0,$h1,[$ctx] // load hash value base 2^64 |
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ldr $h2,[$ctx,#16] |
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tst $len,#31 |
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b.eq .Linit_neon |
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ldp $d0,$d1,[$inp],#16 // load input |
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sub $len,$len,#16 |
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add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) |
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#ifdef __ARMEB__ |
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rev $d0,$d0 |
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rev $d1,$d1 |
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#endif |
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adds $h0,$h0,$d0 // accumulate input |
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adcs $h1,$h1,$d1 |
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adc $h2,$h2,$padbit |
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bl poly1305_mult |
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.Linit_neon: |
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and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26 |
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ubfx x11,$h0,#26,#26 |
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extr x12,$h1,$h0,#52 |
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and x12,x12,#0x03ffffff |
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ubfx x13,$h1,#14,#26 |
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extr x14,$h2,$h1,#40 |
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stp d8,d9,[sp,#16] // meet ABI requirements |
|
|
|
stp d10,d11,[sp,#32] |
|
|
|
stp d12,d13,[sp,#48] |
|
|
|
stp d14,d15,[sp,#64] |
|
|
|
|
|
|
|
fmov ${H0},x10 |
|
|
|
fmov ${H1},x11 |
|
|
|
fmov ${H2},x12 |
|
|
|
fmov ${H3},x13 |
|
|
|
fmov ${H4},x14 |
|
|
|
|
|
|
|
////////////////////////////////// initialize r^n table |
|
|
|
mov $h0,$r0 // r^1 |
|
|
|
add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) |
|
|
|
mov $h1,$r1 |
|
|
|
mov $h2,xzr |
|
|
|
add $ctx,$ctx,#48+12 |
|
|
|
bl poly1305_splat |
|
|
|
|
|
|
|
bl poly1305_mult // r^2 |
|
|
|
sub $ctx,$ctx,#4 |
|
|
|
bl poly1305_splat |
|
|
|
|
|
|
|
bl poly1305_mult // r^3 |
|
|
|
sub $ctx,$ctx,#4 |
|
|
|
bl poly1305_splat |
|
|
|
|
|
|
|
bl poly1305_mult // r^4 |
|
|
|
sub $ctx,$ctx,#4 |
|
|
|
bl poly1305_splat |
|
|
|
ldr x30,[sp,#8] |
|
|
|
|
|
|
|
add $in2,$inp,#32 |
|
|
|
adr $zeros,.Lzeros |
|
|
|
subs $len,$len,#64 |
|
|
|
csel $in2,$zeros,$in2,lo |
|
|
|
|
|
|
|
mov x4,#1 |
|
|
|
str x4,[$ctx,#-24] // set is_base2_26 |
|
|
|
sub $ctx,$ctx,#48 // restore original $ctx |
|
|
|
b .Ldo_neon |
|
|
|
|
|
|
|
.align 4 |
|
|
|
.Leven_neon: |
|
|
|
add $in2,$inp,#32 |
|
|
|
adr $zeros,.Lzeros |
|
|
|
subs $len,$len,#64 |
|
|
|
csel $in2,$zeros,$in2,lo |
|
|
|
|
|
|
|
stp d8,d9,[sp,#16] // meet ABI requirements |
|
|
|
stp d10,d11,[sp,#32] |
|
|
|
stp d12,d13,[sp,#48] |
|
|
|
stp d14,d15,[sp,#64] |
|
|
|
|
|
|
|
fmov ${H0},x10 |
|
|
|
fmov ${H1},x11 |
|
|
|
fmov ${H2},x12 |
|
|
|
fmov ${H3},x13 |
|
|
|
fmov ${H4},x14 |
|
|
|
|
|
|
|
.Ldo_neon: |
|
|
|
ldp x8,x12,[$in2],#16 // inp[2:3] (or zero) |
|
|
|
ldp x9,x13,[$in2],#48 |
|
|
|
|
|
|
|
lsl $padbit,$padbit,#24 |
|
|
|
add x15,$ctx,#48 |
|
|
|
|
|
|
|
#ifdef __ARMEB__ |
|
|
|
rev x8,x8 |
|
|
|
rev x12,x12 |
|
|
|
rev x9,x9 |
|
|
|
rev x13,x13 |
|
|
|
#endif |
|
|
|
and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 |
|
|
|
and x5,x9,#0x03ffffff |
|
|
|
ubfx x6,x8,#26,#26 |
|
|
|
ubfx x7,x9,#26,#26 |
|
|
|
add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 |
|
|
|
extr x8,x12,x8,#52 |
|
|
|
extr x9,x13,x9,#52 |
|
|
|
add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 |
|
|
|
fmov $IN23_0,x4 |
|
|
|
and x8,x8,#0x03ffffff |
|
|
|
and x9,x9,#0x03ffffff |
|
|
|
ubfx x10,x12,#14,#26 |
|
|
|
ubfx x11,x13,#14,#26 |
|
|
|
add x12,$padbit,x12,lsr#40 |
|
|
|
add x13,$padbit,x13,lsr#40 |
|
|
|
add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 |
|
|
|
fmov $IN23_1,x6 |
|
|
|
add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 |
|
|
|
add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 |
|
|
|
fmov $IN23_2,x8 |
|
|
|
fmov $IN23_3,x10 |
|
|
|
fmov $IN23_4,x12 |
|
|
|
|
|
|
|
ldp x8,x12,[$inp],#16 // inp[0:1] |
|
|
|
ldp x9,x13,[$inp],#48 |
|
|
|
|
|
|
|
ld1 {$R0,$R1,$S1,$R2},[x15],#64 |
|
|
|
ld1 {$S2,$R3,$S3,$R4},[x15],#64 |
|
|
|
ld1 {$S4},[x15] |
|
|
|
|
|
|
|
#ifdef __ARMEB__ |
|
|
|
rev x8,x8 |
|
|
|
rev x12,x12 |
|
|
|
rev x9,x9 |
|
|
|
rev x13,x13 |
|
|
|
#endif |
|
|
|
and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 |
|
|
|
and x5,x9,#0x03ffffff |
|
|
|
ubfx x6,x8,#26,#26 |
|
|
|
ubfx x7,x9,#26,#26 |
|
|
|
add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 |
|
|
|
extr x8,x12,x8,#52 |
|
|
|
extr x9,x13,x9,#52 |
|
|
|
add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 |
|
|
|
fmov $IN01_0,x4 |
|
|
|
and x8,x8,#0x03ffffff |
|
|
|
and x9,x9,#0x03ffffff |
|
|
|
ubfx x10,x12,#14,#26 |
|
|
|
ubfx x11,x13,#14,#26 |
|
|
|
add x12,$padbit,x12,lsr#40 |
|
|
|
add x13,$padbit,x13,lsr#40 |
|
|
|
add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 |
|
|
|
fmov $IN01_1,x6 |
|
|
|
add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 |
|
|
|
add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 |
|
|
|
fmov $IN01_2,x8 |
|
|
|
fmov $IN01_3,x10 |
|
|
|
fmov $IN01_4,x12 |
|
|
|
|
|
|
|
b.ls .Lskip_loop |
|
|
|
|
|
|
|
.align 4 |
|
|
|
.Loop_neon: |
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2 |
|
|
|
// ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^3+inp[7]*r |
|
|
|
// \___________________/ |
|
|
|
// ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2+inp[8])*r^2 |
|
|
|
// ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^4+inp[7]*r^2+inp[9])*r |
|
|
|
// \___________________/ \____________________/ |
|
|
|
// |
|
|
|
// Note that we start with inp[2:3]*r^2. This is because it |
|
|
|
// doesn't depend on reduction in previous iteration. |
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// d4 = h0*r4 + h1*r3 + h2*r2 + h3*r1 + h4*r0 |
|
|
|
// d3 = h0*r3 + h1*r2 + h2*r1 + h3*r0 + h4*5*r4 |
|
|
|
// d2 = h0*r2 + h1*r1 + h2*r0 + h3*5*r4 + h4*5*r3 |
|
|
|
// d1 = h0*r1 + h1*r0 + h2*5*r4 + h3*5*r3 + h4*5*r2 |
|
|
|
// d0 = h0*r0 + h1*5*r4 + h2*5*r3 + h3*5*r2 + h4*5*r1 |
|
|
|
|
|
|
|
subs $len,$len,#64 |
|
|
|
umull $ACC4,$IN23_0,${R4}[2] |
|
|
|
csel $in2,$zeros,$in2,lo |
|
|
|
umull $ACC3,$IN23_0,${R3}[2] |
|
|
|
umull $ACC2,$IN23_0,${R2}[2] |
|
|
|
ldp x8,x12,[$in2],#16 // inp[2:3] (or zero) |
|
|
|
umull $ACC1,$IN23_0,${R1}[2] |
|
|
|
ldp x9,x13,[$in2],#48 |
|
|
|
umull $ACC0,$IN23_0,${R0}[2] |
|
|
|
#ifdef __ARMEB__ |
|
|
|
rev x8,x8 |
|
|
|
rev x12,x12 |
|
|
|
rev x9,x9 |
|
|
|
rev x13,x13 |
|
|
|
#endif |
|
|
|
|
|
|
|
umlal $ACC4,$IN23_1,${R3}[2] |
|
|
|
and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 |
|
|
|
umlal $ACC3,$IN23_1,${R2}[2] |
|
|
|
and x5,x9,#0x03ffffff |
|
|
|
umlal $ACC2,$IN23_1,${R1}[2] |
|
|
|
ubfx x6,x8,#26,#26 |
|
|
|
umlal $ACC1,$IN23_1,${R0}[2] |
|
|
|
ubfx x7,x9,#26,#26 |
|
|
|
umlal $ACC0,$IN23_1,${S4}[2] |
|
|
|
add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 |
|
|
|
|
|
|
|
umlal $ACC4,$IN23_2,${R2}[2] |
|
|
|
extr x8,x12,x8,#52 |
|
|
|
umlal $ACC3,$IN23_2,${R1}[2] |
|
|
|
extr x9,x13,x9,#52 |
|
|
|
umlal $ACC2,$IN23_2,${R0}[2] |
|
|
|
add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 |
|
|
|
umlal $ACC1,$IN23_2,${S4}[2] |
|
|
|
fmov $IN23_0,x4 |
|
|
|
umlal $ACC0,$IN23_2,${S3}[2] |
|
|
|
and x8,x8,#0x03ffffff |
|
|
|
|
|
|
|
umlal $ACC4,$IN23_3,${R1}[2] |
|
|
|
and x9,x9,#0x03ffffff |
|
|
|
umlal $ACC3,$IN23_3,${R0}[2] |
|
|
|
ubfx x10,x12,#14,#26 |
|
|
|
umlal $ACC2,$IN23_3,${S4}[2] |
|
|
|
ubfx x11,x13,#14,#26 |
|
|
|
umlal $ACC1,$IN23_3,${S3}[2] |
|
|
|
add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 |
|
|
|
umlal $ACC0,$IN23_3,${S2}[2] |
|
|
|
fmov $IN23_1,x6 |
|
|
|
|
|
|
|
add $IN01_2,$IN01_2,$H2 |
|
|
|
add x12,$padbit,x12,lsr#40 |
|
|
|
umlal $ACC4,$IN23_4,${R0}[2] |
|
|
|
add x13,$padbit,x13,lsr#40 |
|
|
|
umlal $ACC3,$IN23_4,${S4}[2] |
|
|
|
add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 |
|
|
|
umlal $ACC2,$IN23_4,${S3}[2] |
|
|
|
add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 |
|
|
|
umlal $ACC1,$IN23_4,${S2}[2] |
|
|
|
fmov $IN23_2,x8 |
|
|
|
umlal $ACC0,$IN23_4,${S1}[2] |
|
|
|
fmov $IN23_3,x10 |
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// (hash+inp[0:1])*r^4 and accumulate |
|
|
|
|
|
|
|
add $IN01_0,$IN01_0,$H0 |
|
|
|
fmov $IN23_4,x12 |
|
|
|
umlal $ACC3,$IN01_2,${R1}[0] |
|
|
|
ldp x8,x12,[$inp],#16 // inp[0:1] |
|
|
|
umlal $ACC0,$IN01_2,${S3}[0] |
|
|
|
ldp x9,x13,[$inp],#48 |
|
|
|
umlal $ACC4,$IN01_2,${R2}[0] |
|
|
|
umlal $ACC1,$IN01_2,${S4}[0] |
|
|
|
umlal $ACC2,$IN01_2,${R0}[0] |
|
|
|
#ifdef __ARMEB__ |
|
|
|
rev x8,x8 |
|
|
|
rev x12,x12 |
|
|
|
rev x9,x9 |
|
|
|
rev x13,x13 |
|
|
|
#endif |
|
|
|
|
|
|
|
add $IN01_1,$IN01_1,$H1 |
|
|
|
umlal $ACC3,$IN01_0,${R3}[0] |
|
|
|
umlal $ACC4,$IN01_0,${R4}[0] |
|
|
|
and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 |
|
|
|
umlal $ACC2,$IN01_0,${R2}[0] |
|
|
|
and x5,x9,#0x03ffffff |
|
|
|
umlal $ACC0,$IN01_0,${R0}[0] |
|
|
|
ubfx x6,x8,#26,#26 |
|
|
|
umlal $ACC1,$IN01_0,${R1}[0] |
|
|
|
ubfx x7,x9,#26,#26 |
|
|
|
|
|
|
|
add $IN01_3,$IN01_3,$H3 |
|
|
|
add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 |
|
|
|
umlal $ACC3,$IN01_1,${R2}[0] |
|
|
|
extr x8,x12,x8,#52 |
|
|
|
umlal $ACC4,$IN01_1,${R3}[0] |
|
|
|
extr x9,x13,x9,#52 |
|
|
|
umlal $ACC0,$IN01_1,${S4}[0] |
|
|
|
add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 |
|
|
|
umlal $ACC2,$IN01_1,${R1}[0] |
|
|
|
fmov $IN01_0,x4 |
|
|
|
umlal $ACC1,$IN01_1,${R0}[0] |
|
|
|
and x8,x8,#0x03ffffff |
|
|
|
|
|
|
|
add $IN01_4,$IN01_4,$H4 |
|
|
|
and x9,x9,#0x03ffffff |
|
|
|
umlal $ACC3,$IN01_3,${R0}[0] |
|
|
|
ubfx x10,x12,#14,#26 |
|
|
|
umlal $ACC0,$IN01_3,${S2}[0] |
|
|
|
ubfx x11,x13,#14,#26 |
|
|
|
umlal $ACC4,$IN01_3,${R1}[0] |
|
|
|
add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 |
|
|
|
umlal $ACC1,$IN01_3,${S3}[0] |
|
|
|
fmov $IN01_1,x6 |
|
|
|
umlal $ACC2,$IN01_3,${S4}[0] |
|
|
|
add x12,$padbit,x12,lsr#40 |
|
|
|
|
|
|
|
umlal $ACC3,$IN01_4,${S4}[0] |
|
|
|
add x13,$padbit,x13,lsr#40 |
|
|
|
umlal $ACC0,$IN01_4,${S1}[0] |
|
|
|
add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 |
|
|
|
umlal $ACC4,$IN01_4,${R0}[0] |
|
|
|
add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 |
|
|
|
umlal $ACC1,$IN01_4,${S2}[0] |
|
|
|
fmov $IN01_2,x8 |
|
|
|
umlal $ACC2,$IN01_4,${S3}[0] |
|
|
|
fmov $IN01_3,x10 |
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////// |
|
|
|
// lazy reduction as discussed in "NEON crypto" by D.J. Bernstein |
|
|
|
// and P. Schwabe |
|
|
|
|
|
|
|
ushr $T0.2d,$ACC3,#26 |
|
|
|
fmov $IN01_4,x12 |
|
|
|
xtn $H3,$ACC3 |
|
|
|
ushr $T1.2d,$ACC0,#26 |
|
|
|
xtn $H0,$ACC0 |
|
|
|
add $ACC4,$ACC4,$T0.2d // h3 -> h4 |
|
|
|
bic $H3,#0xfc,lsl#24 // &=0x03ffffff |
|
|
|
add $ACC1,$ACC1,$T1.2d // h0 -> h1 |
|
|
|
bic $H0,#0xfc,lsl#24 |
|
|
|
|
|
|
|
shrn $T0.2s,$ACC4,#26 |
|
|
|
xtn $H4,$ACC4 |
|
|
|
ushr $T1.2d,$ACC1,#26 |
|
|
|
xtn $H1,$ACC1 |
|
|
|
add $ACC2,$ACC2,$T1.2d // h1 -> h2 |
|
|
|
bic $H4,#0xfc,lsl#24 |
|
|
|
bic $H1,#0xfc,lsl#24 |
|
|
|
|
|
|
|
add $H0,$H0,$T0.2s |
|
|
|
shl $T0.2s,$T0.2s,#2 |
|
|
|
shrn $T1.2s,$ACC2,#26 |
|
|
|
xtn $H2,$ACC2 |
|
|
|
add $H0,$H0,$T0.2s // h4 -> h0 |
|
|
|
add $H3,$H3,$T1.2s // h2 -> h3 |
|
|
|
bic $H2,#0xfc,lsl#24 |
|
|
|
|
|
|
|
ushr $T0.2s,$H0,#26 |
|
|
|
bic $H0,#0xfc,lsl#24 |
|
|
|
ushr $T1.2s,$H3,#26 |
|
|
|
bic $H3,#0xfc,lsl#24 |
|
|
|
add $H1,$H1,$T0.2s // h0 -> h1 |
|
|
|
add $H4,$H4,$T1.2s // h3 -> h4 |
|
|
|
|
|
|
|
b.hi .Loop_neon |
|
|
|
|
|
|
|
.Lskip_loop: |
|
|
|
dup $IN23_2,${IN23_2}[0] |
|
|
|
movi $MASK.2d,#-1 |
|
|
|
add $IN01_2,$IN01_2,$H2 |
|
|
|
ushr $MASK.2d,$MASK.2d,#38 |
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// multiply (inp[0:1]+hash) or inp[2:3] by r^2:r^1 |
|
|
|
|
|
|
|
adds $len,$len,#32 |
|
|
|
b.ne .Long_tail |
|
|
|
|
|
|
|
dup $IN23_2,${IN01_2}[0] |
|
|
|
add $IN23_0,$IN01_0,$H0 |
|
|
|
add $IN23_3,$IN01_3,$H3 |
|
|
|
add $IN23_1,$IN01_1,$H1 |
|
|
|
add $IN23_4,$IN01_4,$H4 |
|
|
|
|
|
|
|
.Long_tail: |
|
|
|
dup $IN23_0,${IN23_0}[0] |
|
|
|
umull2 $ACC0,$IN23_2,${S3} |
|
|
|
umull2 $ACC3,$IN23_2,${R1} |
|
|
|
umull2 $ACC4,$IN23_2,${R2} |
|
|
|
umull2 $ACC2,$IN23_2,${R0} |
|
|
|
umull2 $ACC1,$IN23_2,${S4} |
|
|
|
|
|
|
|
dup $IN23_1,${IN23_1}[0] |
|
|
|
umlal2 $ACC0,$IN23_0,${R0} |
|
|
|
umlal2 $ACC2,$IN23_0,${R2} |
|
|
|
umlal2 $ACC3,$IN23_0,${R3} |
|
|
|
umlal2 $ACC4,$IN23_0,${R4} |
|
|
|
umlal2 $ACC1,$IN23_0,${R1} |
|
|
|
|
|
|
|
dup $IN23_3,${IN23_3}[0] |
|
|
|
umlal2 $ACC0,$IN23_1,${S4} |
|
|
|
umlal2 $ACC3,$IN23_1,${R2} |
|
|
|
umlal2 $ACC2,$IN23_1,${R1} |
|
|
|
umlal2 $ACC4,$IN23_1,${R3} |
|
|
|
umlal2 $ACC1,$IN23_1,${R0} |
|
|
|
|
|
|
|
dup $IN23_4,${IN23_4}[0] |
|
|
|
umlal2 $ACC3,$IN23_3,${R0} |
|
|
|
umlal2 $ACC4,$IN23_3,${R1} |
|
|
|
umlal2 $ACC0,$IN23_3,${S2} |
|
|
|
umlal2 $ACC1,$IN23_3,${S3} |
|
|
|
umlal2 $ACC2,$IN23_3,${S4} |
|
|
|
|
|
|
|
umlal2 $ACC3,$IN23_4,${S4} |
|
|
|
umlal2 $ACC0,$IN23_4,${S1} |
|
|
|
umlal2 $ACC4,$IN23_4,${R0} |
|
|
|
umlal2 $ACC1,$IN23_4,${S2} |
|
|
|
umlal2 $ACC2,$IN23_4,${S3} |
|
|
|
|
|
|
|
b.eq .Lshort_tail |
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// (hash+inp[0:1])*r^4:r^3 and accumulate |
|
|
|
|
|
|
|
add $IN01_0,$IN01_0,$H0 |
|
|
|
umlal $ACC3,$IN01_2,${R1} |
|
|
|
umlal $ACC0,$IN01_2,${S3} |
|
|
|
umlal $ACC4,$IN01_2,${R2} |
|
|
|
umlal $ACC1,$IN01_2,${S4} |
|
|
|
umlal $ACC2,$IN01_2,${R0} |
|
|
|
|
|
|
|
add $IN01_1,$IN01_1,$H1 |
|
|
|
umlal $ACC3,$IN01_0,${R3} |
|
|
|
umlal $ACC0,$IN01_0,${R0} |
|
|
|
umlal $ACC4,$IN01_0,${R4} |
|
|
|
umlal $ACC1,$IN01_0,${R1} |
|
|
|
umlal $ACC2,$IN01_0,${R2} |
|
|
|
|
|
|
|
add $IN01_3,$IN01_3,$H3 |
|
|
|
umlal $ACC3,$IN01_1,${R2} |
|
|
|
umlal $ACC0,$IN01_1,${S4} |
|
|
|
umlal $ACC4,$IN01_1,${R3} |
|
|
|
umlal $ACC1,$IN01_1,${R0} |
|
|
|
umlal $ACC2,$IN01_1,${R1} |
|
|
|
|
|
|
|
add $IN01_4,$IN01_4,$H4 |
|
|
|
umlal $ACC3,$IN01_3,${R0} |
|
|
|
umlal $ACC0,$IN01_3,${S2} |
|
|
|
umlal $ACC4,$IN01_3,${R1} |
|
|
|
umlal $ACC1,$IN01_3,${S3} |
|
|
|
umlal $ACC2,$IN01_3,${S4} |
|
|
|
|
|
|
|
umlal $ACC3,$IN01_4,${S4} |
|
|
|
umlal $ACC0,$IN01_4,${S1} |
|
|
|
umlal $ACC4,$IN01_4,${R0} |
|
|
|
umlal $ACC1,$IN01_4,${S2} |
|
|
|
umlal $ACC2,$IN01_4,${S3} |
|
|
|
|
|
|
|
.Lshort_tail: |
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// lazy reduction, but without narrowing |
|
|
|
|
|
|
|
ushr $T0.2d,$ACC3,#26 |
|
|
|
and $ACC3,$ACC3,$MASK.2d |
|
|
|
ushr $T1.2d,$ACC0,#26 |
|
|
|
and $ACC0,$ACC0,$MASK.2d |
|
|
|
|
|
|
|
add $ACC4,$ACC4,$T0.2d // h3 -> h4 |
|
|
|
add $ACC1,$ACC1,$T1.2d // h0 -> h1 |
|
|
|
|
|
|
|
ushr $T0.2d,$ACC4,#26 |
|
|
|
and $ACC4,$ACC4,$MASK.2d |
|
|
|
ushr $T1.2d,$ACC1,#26 |
|
|
|
and $ACC1,$ACC1,$MASK.2d |
|
|
|
add $ACC2,$ACC2,$T1.2d // h1 -> h2 |
|
|
|
|
|
|
|
add $ACC0,$ACC0,$T0.2d |
|
|
|
shl $T0.2d,$T0.2d,#2 |
|
|
|
ushr $T1.2d,$ACC2,#26 |
|
|
|
and $ACC2,$ACC2,$MASK.2d |
|
|
|
add $ACC0,$ACC0,$T0.2d // h4 -> h0 |
|
|
|
add $ACC3,$ACC3,$T1.2d // h2 -> h3 |
|
|
|
|
|
|
|
ushr $T0.2d,$ACC0,#26 |
|
|
|
and $ACC0,$ACC0,$MASK.2d |
|
|
|
ushr $T1.2d,$ACC3,#26 |
|
|
|
and $ACC3,$ACC3,$MASK.2d |
|
|
|
add $ACC1,$ACC1,$T0.2d // h0 -> h1 |
|
|
|
add $ACC4,$ACC4,$T1.2d // h3 -> h4 |
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// horizontal add |
|
|
|
|
|
|
|
addp $ACC2,$ACC2,$ACC2 |
|
|
|
ldp d8,d9,[sp,#16] // meet ABI requirements |
|
|
|
addp $ACC0,$ACC0,$ACC0 |
|
|
|
ldp d10,d11,[sp,#32] |
|
|
|
addp $ACC1,$ACC1,$ACC1 |
|
|
|
ldp d12,d13,[sp,#48] |
|
|
|
addp $ACC3,$ACC3,$ACC3 |
|
|
|
ldp d14,d15,[sp,#64] |
|
|
|
addp $ACC4,$ACC4,$ACC4 |
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////// |
|
|
|
// write the result, can be partially reduced |
|
|
|
|
|
|
|
st4 {$ACC0,$ACC1,$ACC2,$ACC3}[0],[$ctx],#16 |
|
|
|
st1 {$ACC4}[0],[$ctx] |
|
|
|
|
|
|
|
.Lno_data_neon: |
|
|
|
ldr x29,[sp],#80 |
|
|
|
ret |
|
|
|
.size poly1305_blocks_neon,.-poly1305_blocks_neon |
|
|
|
|
|
|
|
.type poly1305_emit_neon,%function |
|
|
|
.align 5 |
|
|
|
poly1305_emit_neon: |
|
|
|
ldr $is_base2_26,[$ctx,#24] |
|
|
|
cbz $is_base2_26,poly1305_emit |
|
|
|
|
|
|
|
ldp w10,w11,[$ctx] // load hash value base 2^26 |
|
|
|
ldp w12,w13,[$ctx,#8] |
|
|
|
ldr w14,[$ctx,#16] |
|
|
|
|
|
|
|
add $h0,x10,x11,lsl#26 // base 2^26 -> base 2^64 |
|
|
|
lsr $h1,x12,#12 |
|
|
|
adds $h0,$h0,x12,lsl#52 |
|
|
|
add $h1,$h1,x13,lsl#14 |
|
|
|
adc $h1,$h1,xzr |
|
|
|
lsr $h2,x14,#24 |
|
|
|
adds $h1,$h1,x14,lsl#40 |
|
|
|
adc $h2,$h2,xzr // can be partially reduced... |
|
|
|
|
|
|
|
ldp $t0,$t1,[$nonce] // load nonce |
|
|
|
|
|
|
|
and $d0,$h2,#-4 // ... so reduce |
|
|
|
add $d0,$d0,$h2,lsr#2 |
|
|
|
and $h2,$h2,#3 |
|
|
|
adds $h0,$h0,$d0 |
|
|
|
adc $h1,$h1,xzr |
|
|
|
|
|
|
|
adds $d0,$h0,#5 // compare to modulus |
|
|
|
adcs $d1,$h1,xzr |
|
|
|
adc $d2,$h2,xzr |
|
|
|
|
|
|
|
tst $d2,#-4 // see if it's carried/borrowed |
|
|
|
|
|
|
|
csel $h0,$h0,$d0,eq |
|
|
|
csel $h1,$h1,$d1,eq |
|
|
|
|
|
|
|
#ifdef __ARMEB__ |
|
|
|
ror $t0,$t0,#32 // flip nonce words |
|
|
|
ror $t1,$t1,#32 |
|
|
|
#endif |
|
|
|
adds $h0,$h0,$t0 // accumulate nonce |
|
|
|
adc $h1,$h1,$t1 |
|
|
|
#ifdef __ARMEB__ |
|
|
|
rev $h0,$h0 // flip output bytes |
|
|
|
rev $h1,$h1 |
|
|
|
#endif |
|
|
|
stp $h0,$h1,[$mac] // write result |
|
|
|
|
|
|
|
ret |
|
|
|
.size poly1305_emit_neon,.-poly1305_emit_neon |
|
|
|
|
|
|
|
.align 5 |
|
|
|
.Lzeros: |
|
|
|
.long 0,0,0,0,0,0,0,0 |
|
|
|
.LOPENSSL_armcap_P: |
|
|
|
#ifdef __ILP32__ |
|
|
|
.long OPENSSL_armcap_P-. |
|
|
|
#else |
|
|
|
.quad OPENSSL_armcap_P-. |
|
|
|
#endif |
|
|
|
.asciz "Poly1305 for ARMv8, CRYPTOGAMS by <appro\@openssl.org>" |
|
|
|
.align 2 |
|
|
|
___ |
|
|
|
|
|
|
|
foreach (split("\n",$code)) { |
|
|
|
s/\b(shrn\s+v[0-9]+)\.[24]d/$1.2s/ or |
|
|
|
s/\b(fmov\s+)v([0-9]+)[^,]*,\s*x([0-9]+)/$1d$2,x$3/ or |
|
|
|
(m/\bdup\b/ and (s/\.[24]s/.2d/g or 1)) or |
|
|
|
(m/\b(eor|and)/ and (s/\.[248][sdh]/.16b/g or 1)) or |
|
|
|
(m/\bum(ul|la)l\b/ and (s/\.4s/.2s/g or 1)) or |
|
|
|
(m/\bum(ul|la)l2\b/ and (s/\.2s/.4s/g or 1)) or |
|
|
|
(m/\bst[1-4]\s+{[^}]+}\[/ and (s/\.[24]d/.s/g or 1)); |
|
|
|
|
|
|
|
s/\.[124]([sd])\[/.$1\[/; |
|
|
|
|
|
|
|
print $_,"\n"; |
|
|
|
} |
|
|
|
close STDOUT; |