| 1 | #! /usr/bin/env perl
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| 2 | # Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | #
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| 4 | # Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | # this file except in compliance with the License. You can obtain a copy
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| 6 | # in the file LICENSE in the source distribution or at
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| 7 | # https://www.openssl.org/source/license.html
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| 8 |
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| 9 | #
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| 10 | # ====================================================================
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| 11 | # Written by Andy Polyakov <[email protected]> for the OpenSSL
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| 12 | # project. The module is, however, dual licensed under OpenSSL and
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| 13 | # CRYPTOGAMS licenses depending on where you obtain it. For further
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| 14 | # details see http://www.openssl.org/~appro/cryptogams/.
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| 15 | # ====================================================================
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| 16 | #
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| 17 | # IALU(*)/gcc-4.4 NEON
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| 18 | #
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| 19 | # ARM11xx(ARMv6) 7.78/+100% -
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| 20 | # Cortex-A5 6.35/+130% 3.00
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| 21 | # Cortex-A8 6.25/+115% 2.36
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| 22 | # Cortex-A9 5.10/+95% 2.55
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| 23 | # Cortex-A15 3.85/+85% 1.25(**)
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| 24 | # Snapdragon S4 5.70/+100% 1.48(**)
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| 25 | #
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| 26 | # (*) this is for -march=armv6, i.e. with bunch of ldrb loading data;
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| 27 | # (**) these are trade-off results, they can be improved by ~8% but at
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| 28 | # the cost of 15/12% regression on Cortex-A5/A7, it's even possible
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| 29 | # to improve Cortex-A9 result, but then A5/A7 loose more than 20%;
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| 30 |
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| 31 | $flavour = shift;
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| 32 | if ($flavour=~/\w[\w\-]*\.\w+$/) { $output=$flavour; undef $flavour; }
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| 33 | else { while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {} }
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| 34 |
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| 35 | if ($flavour && $flavour ne "void") {
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| 36 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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| 37 | ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
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| 38 | ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
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| 39 | die "can't locate arm-xlate.pl";
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| 40 |
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| 41 | open STDOUT,"| \"$^X\" $xlate $flavour $output";
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| 42 | } else {
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| 43 | open STDOUT,">$output";
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| 44 | }
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| 45 |
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| 46 | ($ctx,$inp,$len,$padbit)=map("r$_",(0..3));
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| 47 |
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| 48 | $code.=<<___;
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| 49 | #include "arm_arch.h"
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| 50 |
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| 51 | .text
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| 52 | #if defined(__thumb2__)
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| 53 | .syntax unified
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| 54 | .thumb
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| 55 | #else
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| 56 | .code 32
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| 57 | #endif
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| 58 |
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| 59 | .globl poly1305_emit
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| 60 | .globl poly1305_blocks
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| 61 | .globl poly1305_init
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| 62 | .type poly1305_init,%function
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| 63 | .align 5
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| 64 | poly1305_init:
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| 65 | .Lpoly1305_init:
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| 66 | stmdb sp!,{r4-r11}
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| 67 |
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| 68 | eor r3,r3,r3
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| 69 | cmp $inp,#0
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| 70 | str r3,[$ctx,#0] @ zero hash value
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| 71 | str r3,[$ctx,#4]
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| 72 | str r3,[$ctx,#8]
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| 73 | str r3,[$ctx,#12]
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| 74 | str r3,[$ctx,#16]
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| 75 | str r3,[$ctx,#36] @ is_base2_26
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| 76 | add $ctx,$ctx,#20
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| 77 |
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| 78 | #ifdef __thumb2__
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| 79 | it eq
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| 80 | #endif
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| 81 | moveq r0,#0
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| 82 | beq .Lno_key
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| 83 |
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| 84 | #if __ARM_MAX_ARCH__>=7
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| 85 | adr r11,.Lpoly1305_init
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| 86 | ldr r12,.LOPENSSL_armcap
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| 87 | #endif
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| 88 | ldrb r4,[$inp,#0]
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| 89 | mov r10,#0x0fffffff
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| 90 | ldrb r5,[$inp,#1]
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| 91 | and r3,r10,#-4 @ 0x0ffffffc
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| 92 | ldrb r6,[$inp,#2]
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| 93 | ldrb r7,[$inp,#3]
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| 94 | orr r4,r4,r5,lsl#8
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| 95 | ldrb r5,[$inp,#4]
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| 96 | orr r4,r4,r6,lsl#16
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| 97 | ldrb r6,[$inp,#5]
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| 98 | orr r4,r4,r7,lsl#24
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| 99 | ldrb r7,[$inp,#6]
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| 100 | and r4,r4,r10
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| 101 |
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| 102 | #if __ARM_MAX_ARCH__>=7
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| 103 | ldr r12,[r11,r12] @ OPENSSL_armcap_P
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| 104 | # ifdef __APPLE__
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| 105 | ldr r12,[r12]
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| 106 | # endif
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| 107 | #endif
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| 108 | ldrb r8,[$inp,#7]
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| 109 | orr r5,r5,r6,lsl#8
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| 110 | ldrb r6,[$inp,#8]
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| 111 | orr r5,r5,r7,lsl#16
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| 112 | ldrb r7,[$inp,#9]
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| 113 | orr r5,r5,r8,lsl#24
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| 114 | ldrb r8,[$inp,#10]
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| 115 | and r5,r5,r3
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| 116 |
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| 117 | #if __ARM_MAX_ARCH__>=7
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| 118 | tst r12,#ARMV7_NEON @ check for NEON
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| 119 | # ifdef __APPLE__
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| 120 | adr r9,poly1305_blocks_neon
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| 121 | adr r11,poly1305_blocks
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| 122 | # ifdef __thumb2__
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| 123 | it ne
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| 124 | # endif
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| 125 | movne r11,r9
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| 126 | adr r12,poly1305_emit
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| 127 | adr r10,poly1305_emit_neon
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| 128 | # ifdef __thumb2__
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| 129 | it ne
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| 130 | # endif
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| 131 | movne r12,r10
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| 132 | # else
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| 133 | # ifdef __thumb2__
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| 134 | itete eq
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| 135 | # endif
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| 136 | addeq r12,r11,#(poly1305_emit-.Lpoly1305_init)
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| 137 | addne r12,r11,#(poly1305_emit_neon-.Lpoly1305_init)
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| 138 | addeq r11,r11,#(poly1305_blocks-.Lpoly1305_init)
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| 139 | addne r11,r11,#(poly1305_blocks_neon-.Lpoly1305_init)
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| 140 | # endif
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| 141 | # ifdef __thumb2__
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| 142 | orr r12,r12,#1 @ thumb-ify address
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| 143 | orr r11,r11,#1
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| 144 | # endif
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| 145 | #endif
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| 146 | ldrb r9,[$inp,#11]
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| 147 | orr r6,r6,r7,lsl#8
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| 148 | ldrb r7,[$inp,#12]
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| 149 | orr r6,r6,r8,lsl#16
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| 150 | ldrb r8,[$inp,#13]
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| 151 | orr r6,r6,r9,lsl#24
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| 152 | ldrb r9,[$inp,#14]
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| 153 | and r6,r6,r3
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| 154 |
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| 155 | ldrb r10,[$inp,#15]
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| 156 | orr r7,r7,r8,lsl#8
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| 157 | str r4,[$ctx,#0]
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| 158 | orr r7,r7,r9,lsl#16
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| 159 | str r5,[$ctx,#4]
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| 160 | orr r7,r7,r10,lsl#24
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| 161 | str r6,[$ctx,#8]
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| 162 | and r7,r7,r3
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| 163 | str r7,[$ctx,#12]
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| 164 | #if __ARM_MAX_ARCH__>=7
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| 165 | stmia r2,{r11,r12} @ fill functions table
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| 166 | mov r0,#1
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| 167 | #else
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| 168 | mov r0,#0
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| 169 | #endif
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| 170 | .Lno_key:
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| 171 | ldmia sp!,{r4-r11}
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| 172 | #if __ARM_ARCH__>=5
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| 173 | ret @ bx lr
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| 174 | #else
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| 175 | tst lr,#1
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| 176 | moveq pc,lr @ be binary compatible with V4, yet
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| 177 | bx lr @ interoperable with Thumb ISA:-)
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| 178 | #endif
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| 179 | .size poly1305_init,.-poly1305_init
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| 180 | ___
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| 181 | {
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| 182 | my ($h0,$h1,$h2,$h3,$h4,$r0,$r1,$r2,$r3)=map("r$_",(4..12));
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| 183 | my ($s1,$s2,$s3)=($r1,$r2,$r3);
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| 184 |
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| 185 | $code.=<<___;
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| 186 | .type poly1305_blocks,%function
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| 187 | .align 5
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| 188 | poly1305_blocks:
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| 189 | stmdb sp!,{r3-r11,lr}
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| 190 |
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| 191 | ands $len,$len,#-16
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| 192 | beq .Lno_data
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| 193 |
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| 194 | cmp $padbit,#0
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| 195 | add $len,$len,$inp @ end pointer
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| 196 | sub sp,sp,#32
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| 197 |
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| 198 | ldmia $ctx,{$h0-$r3} @ load context
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| 199 |
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| 200 | str $ctx,[sp,#12] @ offload stuff
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| 201 | mov lr,$inp
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| 202 | str $len,[sp,#16]
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| 203 | str $r1,[sp,#20]
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| 204 | str $r2,[sp,#24]
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| 205 | str $r3,[sp,#28]
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| 206 | b .Loop
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| 207 |
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| 208 | .Loop:
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| 209 | #if __ARM_ARCH__<7
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| 210 | ldrb r0,[lr],#16 @ load input
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| 211 | # ifdef __thumb2__
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| 212 | it hi
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| 213 | # endif
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| 214 | addhi $h4,$h4,#1 @ 1<<128
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| 215 | ldrb r1,[lr,#-15]
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| 216 | ldrb r2,[lr,#-14]
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| 217 | ldrb r3,[lr,#-13]
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| 218 | orr r1,r0,r1,lsl#8
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| 219 | ldrb r0,[lr,#-12]
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| 220 | orr r2,r1,r2,lsl#16
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| 221 | ldrb r1,[lr,#-11]
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| 222 | orr r3,r2,r3,lsl#24
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| 223 | ldrb r2,[lr,#-10]
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| 224 | adds $h0,$h0,r3 @ accumulate input
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| 225 |
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| 226 | ldrb r3,[lr,#-9]
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| 227 | orr r1,r0,r1,lsl#8
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| 228 | ldrb r0,[lr,#-8]
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| 229 | orr r2,r1,r2,lsl#16
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| 230 | ldrb r1,[lr,#-7]
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| 231 | orr r3,r2,r3,lsl#24
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| 232 | ldrb r2,[lr,#-6]
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| 233 | adcs $h1,$h1,r3
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| 234 |
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| 235 | ldrb r3,[lr,#-5]
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| 236 | orr r1,r0,r1,lsl#8
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| 237 | ldrb r0,[lr,#-4]
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| 238 | orr r2,r1,r2,lsl#16
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| 239 | ldrb r1,[lr,#-3]
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| 240 | orr r3,r2,r3,lsl#24
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| 241 | ldrb r2,[lr,#-2]
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| 242 | adcs $h2,$h2,r3
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| 243 |
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| 244 | ldrb r3,[lr,#-1]
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| 245 | orr r1,r0,r1,lsl#8
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| 246 | str lr,[sp,#8] @ offload input pointer
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| 247 | orr r2,r1,r2,lsl#16
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| 248 | add $s1,$r1,$r1,lsr#2
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| 249 | orr r3,r2,r3,lsl#24
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| 250 | #else
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| 251 | ldr r0,[lr],#16 @ load input
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| 252 | # ifdef __thumb2__
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| 253 | it hi
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| 254 | # endif
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| 255 | addhi $h4,$h4,#1 @ padbit
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| 256 | ldr r1,[lr,#-12]
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| 257 | ldr r2,[lr,#-8]
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| 258 | ldr r3,[lr,#-4]
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| 259 | # ifdef __ARMEB__
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| 260 | rev r0,r0
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| 261 | rev r1,r1
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| 262 | rev r2,r2
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| 263 | rev r3,r3
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| 264 | # endif
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| 265 | adds $h0,$h0,r0 @ accumulate input
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| 266 | str lr,[sp,#8] @ offload input pointer
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| 267 | adcs $h1,$h1,r1
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| 268 | add $s1,$r1,$r1,lsr#2
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| 269 | adcs $h2,$h2,r2
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| 270 | #endif
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| 271 | add $s2,$r2,$r2,lsr#2
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| 272 | adcs $h3,$h3,r3
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| 273 | add $s3,$r3,$r3,lsr#2
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| 274 |
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| 275 | umull r2,r3,$h1,$r0
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| 276 | adc $h4,$h4,#0
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| 277 | umull r0,r1,$h0,$r0
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| 278 | umlal r2,r3,$h4,$s1
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| 279 | umlal r0,r1,$h3,$s1
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| 280 | ldr $r1,[sp,#20] @ reload $r1
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| 281 | umlal r2,r3,$h2,$s3
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| 282 | umlal r0,r1,$h1,$s3
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| 283 | umlal r2,r3,$h3,$s2
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| 284 | umlal r0,r1,$h2,$s2
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| 285 | umlal r2,r3,$h0,$r1
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| 286 | str r0,[sp,#0] @ future $h0
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| 287 | mul r0,$s2,$h4
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| 288 | ldr $r2,[sp,#24] @ reload $r2
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| 289 | adds r2,r2,r1 @ d1+=d0>>32
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| 290 | eor r1,r1,r1
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| 291 | adc lr,r3,#0 @ future $h2
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| 292 | str r2,[sp,#4] @ future $h1
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| 293 |
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| 294 | mul r2,$s3,$h4
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| 295 | eor r3,r3,r3
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| 296 | umlal r0,r1,$h3,$s3
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| 297 | ldr $r3,[sp,#28] @ reload $r3
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| 298 | umlal r2,r3,$h3,$r0
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| 299 | umlal r0,r1,$h2,$r0
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| 300 | umlal r2,r3,$h2,$r1
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| 301 | umlal r0,r1,$h1,$r1
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| 302 | umlal r2,r3,$h1,$r2
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| 303 | umlal r0,r1,$h0,$r2
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| 304 | umlal r2,r3,$h0,$r3
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| 305 | ldr $h0,[sp,#0]
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| 306 | mul $h4,$r0,$h4
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| 307 | ldr $h1,[sp,#4]
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| 308 |
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| 309 | adds $h2,lr,r0 @ d2+=d1>>32
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| 310 | ldr lr,[sp,#8] @ reload input pointer
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| 311 | adc r1,r1,#0
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| 312 | adds $h3,r2,r1 @ d3+=d2>>32
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| 313 | ldr r0,[sp,#16] @ reload end pointer
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| 314 | adc r3,r3,#0
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| 315 | add $h4,$h4,r3 @ h4+=d3>>32
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| 316 |
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| 317 | and r1,$h4,#-4
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| 318 | and $h4,$h4,#3
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| 319 | add r1,r1,r1,lsr#2 @ *=5
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| 320 | adds $h0,$h0,r1
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| 321 | adcs $h1,$h1,#0
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| 322 | adcs $h2,$h2,#0
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| 323 | adcs $h3,$h3,#0
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| 324 | adc $h4,$h4,#0
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| 325 |
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| 326 | cmp r0,lr @ done yet?
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| 327 | bhi .Loop
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| 328 |
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| 329 | ldr $ctx,[sp,#12]
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| 330 | add sp,sp,#32
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| 331 | stmia $ctx,{$h0-$h4} @ store the result
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| 332 |
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| 333 | .Lno_data:
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| 334 | #if __ARM_ARCH__>=5
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| 335 | ldmia sp!,{r3-r11,pc}
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| 336 | #else
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| 337 | ldmia sp!,{r3-r11,lr}
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| 338 | tst lr,#1
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| 339 | moveq pc,lr @ be binary compatible with V4, yet
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| 340 | bx lr @ interoperable with Thumb ISA:-)
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| 341 | #endif
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| 342 | .size poly1305_blocks,.-poly1305_blocks
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| 343 | ___
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| 344 | }
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| 345 | {
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| 346 | my ($ctx,$mac,$nonce)=map("r$_",(0..2));
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| 347 | my ($h0,$h1,$h2,$h3,$h4,$g0,$g1,$g2,$g3)=map("r$_",(3..11));
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| 348 | my $g4=$h4;
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| 349 |
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| 350 | $code.=<<___;
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| 351 | .type poly1305_emit,%function
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| 352 | .align 5
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| 353 | poly1305_emit:
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| 354 | stmdb sp!,{r4-r11}
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| 355 | .Lpoly1305_emit_enter:
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| 356 |
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| 357 | ldmia $ctx,{$h0-$h4}
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| 358 | adds $g0,$h0,#5 @ compare to modulus
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| 359 | adcs $g1,$h1,#0
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| 360 | adcs $g2,$h2,#0
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| 361 | adcs $g3,$h3,#0
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| 362 | adc $g4,$h4,#0
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| 363 | tst $g4,#4 @ did it carry/borrow?
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| 364 |
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| 365 | #ifdef __thumb2__
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| 366 | it ne
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| 367 | #endif
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| 368 | movne $h0,$g0
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| 369 | ldr $g0,[$nonce,#0]
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| 370 | #ifdef __thumb2__
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| 371 | it ne
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| 372 | #endif
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| 373 | movne $h1,$g1
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| 374 | ldr $g1,[$nonce,#4]
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| 375 | #ifdef __thumb2__
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| 376 | it ne
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| 377 | #endif
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| 378 | movne $h2,$g2
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| 379 | ldr $g2,[$nonce,#8]
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| 380 | #ifdef __thumb2__
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| 381 | it ne
|
|---|
| 382 | #endif
|
|---|
| 383 | movne $h3,$g3
|
|---|
| 384 | ldr $g3,[$nonce,#12]
|
|---|
| 385 |
|
|---|
| 386 | adds $h0,$h0,$g0
|
|---|
| 387 | adcs $h1,$h1,$g1
|
|---|
| 388 | adcs $h2,$h2,$g2
|
|---|
| 389 | adc $h3,$h3,$g3
|
|---|
| 390 |
|
|---|
| 391 | #if __ARM_ARCH__>=7
|
|---|
| 392 | # ifdef __ARMEB__
|
|---|
| 393 | rev $h0,$h0
|
|---|
| 394 | rev $h1,$h1
|
|---|
| 395 | rev $h2,$h2
|
|---|
| 396 | rev $h3,$h3
|
|---|
| 397 | # endif
|
|---|
| 398 | str $h0,[$mac,#0]
|
|---|
| 399 | str $h1,[$mac,#4]
|
|---|
| 400 | str $h2,[$mac,#8]
|
|---|
| 401 | str $h3,[$mac,#12]
|
|---|
| 402 | #else
|
|---|
| 403 | strb $h0,[$mac,#0]
|
|---|
| 404 | mov $h0,$h0,lsr#8
|
|---|
| 405 | strb $h1,[$mac,#4]
|
|---|
| 406 | mov $h1,$h1,lsr#8
|
|---|
| 407 | strb $h2,[$mac,#8]
|
|---|
| 408 | mov $h2,$h2,lsr#8
|
|---|
| 409 | strb $h3,[$mac,#12]
|
|---|
| 410 | mov $h3,$h3,lsr#8
|
|---|
| 411 |
|
|---|
| 412 | strb $h0,[$mac,#1]
|
|---|
| 413 | mov $h0,$h0,lsr#8
|
|---|
| 414 | strb $h1,[$mac,#5]
|
|---|
| 415 | mov $h1,$h1,lsr#8
|
|---|
| 416 | strb $h2,[$mac,#9]
|
|---|
| 417 | mov $h2,$h2,lsr#8
|
|---|
| 418 | strb $h3,[$mac,#13]
|
|---|
| 419 | mov $h3,$h3,lsr#8
|
|---|
| 420 |
|
|---|
| 421 | strb $h0,[$mac,#2]
|
|---|
| 422 | mov $h0,$h0,lsr#8
|
|---|
| 423 | strb $h1,[$mac,#6]
|
|---|
| 424 | mov $h1,$h1,lsr#8
|
|---|
| 425 | strb $h2,[$mac,#10]
|
|---|
| 426 | mov $h2,$h2,lsr#8
|
|---|
| 427 | strb $h3,[$mac,#14]
|
|---|
| 428 | mov $h3,$h3,lsr#8
|
|---|
| 429 |
|
|---|
| 430 | strb $h0,[$mac,#3]
|
|---|
| 431 | strb $h1,[$mac,#7]
|
|---|
| 432 | strb $h2,[$mac,#11]
|
|---|
| 433 | strb $h3,[$mac,#15]
|
|---|
| 434 | #endif
|
|---|
| 435 | ldmia sp!,{r4-r11}
|
|---|
| 436 | #if __ARM_ARCH__>=5
|
|---|
| 437 | ret @ bx lr
|
|---|
| 438 | #else
|
|---|
| 439 | tst lr,#1
|
|---|
| 440 | moveq pc,lr @ be binary compatible with V4, yet
|
|---|
| 441 | bx lr @ interoperable with Thumb ISA:-)
|
|---|
| 442 | #endif
|
|---|
| 443 | .size poly1305_emit,.-poly1305_emit
|
|---|
| 444 | ___
|
|---|
| 445 | {
|
|---|
| 446 | my ($R0,$R1,$S1,$R2,$S2,$R3,$S3,$R4,$S4) = map("d$_",(0..9));
|
|---|
| 447 | my ($D0,$D1,$D2,$D3,$D4, $H0,$H1,$H2,$H3,$H4) = map("q$_",(5..14));
|
|---|
| 448 | my ($T0,$T1,$MASK) = map("q$_",(15,4,0));
|
|---|
| 449 |
|
|---|
| 450 | my ($in2,$zeros,$tbl0,$tbl1) = map("r$_",(4..7));
|
|---|
| 451 |
|
|---|
| 452 | $code.=<<___;
|
|---|
| 453 | #if __ARM_MAX_ARCH__>=7
|
|---|
| 454 | .fpu neon
|
|---|
| 455 |
|
|---|
| 456 | .type poly1305_init_neon,%function
|
|---|
| 457 | .align 5
|
|---|
| 458 | poly1305_init_neon:
|
|---|
| 459 | ldr r4,[$ctx,#20] @ load key base 2^32
|
|---|
| 460 | ldr r5,[$ctx,#24]
|
|---|
| 461 | ldr r6,[$ctx,#28]
|
|---|
| 462 | ldr r7,[$ctx,#32]
|
|---|
| 463 |
|
|---|
| 464 | and r2,r4,#0x03ffffff @ base 2^32 -> base 2^26
|
|---|
| 465 | mov r3,r4,lsr#26
|
|---|
| 466 | mov r4,r5,lsr#20
|
|---|
| 467 | orr r3,r3,r5,lsl#6
|
|---|
| 468 | mov r5,r6,lsr#14
|
|---|
| 469 | orr r4,r4,r6,lsl#12
|
|---|
| 470 | mov r6,r7,lsr#8
|
|---|
| 471 | orr r5,r5,r7,lsl#18
|
|---|
| 472 | and r3,r3,#0x03ffffff
|
|---|
| 473 | and r4,r4,#0x03ffffff
|
|---|
| 474 | and r5,r5,#0x03ffffff
|
|---|
| 475 |
|
|---|
| 476 | vdup.32 $R0,r2 @ r^1 in both lanes
|
|---|
| 477 | add r2,r3,r3,lsl#2 @ *5
|
|---|
| 478 | vdup.32 $R1,r3
|
|---|
| 479 | add r3,r4,r4,lsl#2
|
|---|
| 480 | vdup.32 $S1,r2
|
|---|
| 481 | vdup.32 $R2,r4
|
|---|
| 482 | add r4,r5,r5,lsl#2
|
|---|
| 483 | vdup.32 $S2,r3
|
|---|
| 484 | vdup.32 $R3,r5
|
|---|
| 485 | add r5,r6,r6,lsl#2
|
|---|
| 486 | vdup.32 $S3,r4
|
|---|
| 487 | vdup.32 $R4,r6
|
|---|
| 488 | vdup.32 $S4,r5
|
|---|
| 489 |
|
|---|
| 490 | mov $zeros,#2 @ counter
|
|---|
| 491 |
|
|---|
| 492 | .Lsquare_neon:
|
|---|
| 493 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 494 | @ d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
|
|---|
| 495 | @ d1 = h1*r0 + h0*r1 + h4*5*r2 + h3*5*r3 + h2*5*r4
|
|---|
| 496 | @ d2 = h2*r0 + h1*r1 + h0*r2 + h4*5*r3 + h3*5*r4
|
|---|
| 497 | @ d3 = h3*r0 + h2*r1 + h1*r2 + h0*r3 + h4*5*r4
|
|---|
| 498 | @ d4 = h4*r0 + h3*r1 + h2*r2 + h1*r3 + h0*r4
|
|---|
| 499 |
|
|---|
| 500 | vmull.u32 $D0,$R0,${R0}[1]
|
|---|
| 501 | vmull.u32 $D1,$R1,${R0}[1]
|
|---|
| 502 | vmull.u32 $D2,$R2,${R0}[1]
|
|---|
| 503 | vmull.u32 $D3,$R3,${R0}[1]
|
|---|
| 504 | vmull.u32 $D4,$R4,${R0}[1]
|
|---|
| 505 |
|
|---|
| 506 | vmlal.u32 $D0,$R4,${S1}[1]
|
|---|
| 507 | vmlal.u32 $D1,$R0,${R1}[1]
|
|---|
| 508 | vmlal.u32 $D2,$R1,${R1}[1]
|
|---|
| 509 | vmlal.u32 $D3,$R2,${R1}[1]
|
|---|
| 510 | vmlal.u32 $D4,$R3,${R1}[1]
|
|---|
| 511 |
|
|---|
| 512 | vmlal.u32 $D0,$R3,${S2}[1]
|
|---|
| 513 | vmlal.u32 $D1,$R4,${S2}[1]
|
|---|
| 514 | vmlal.u32 $D3,$R1,${R2}[1]
|
|---|
| 515 | vmlal.u32 $D2,$R0,${R2}[1]
|
|---|
| 516 | vmlal.u32 $D4,$R2,${R2}[1]
|
|---|
| 517 |
|
|---|
| 518 | vmlal.u32 $D0,$R2,${S3}[1]
|
|---|
| 519 | vmlal.u32 $D3,$R0,${R3}[1]
|
|---|
| 520 | vmlal.u32 $D1,$R3,${S3}[1]
|
|---|
| 521 | vmlal.u32 $D2,$R4,${S3}[1]
|
|---|
| 522 | vmlal.u32 $D4,$R1,${R3}[1]
|
|---|
| 523 |
|
|---|
| 524 | vmlal.u32 $D3,$R4,${S4}[1]
|
|---|
| 525 | vmlal.u32 $D0,$R1,${S4}[1]
|
|---|
| 526 | vmlal.u32 $D1,$R2,${S4}[1]
|
|---|
| 527 | vmlal.u32 $D2,$R3,${S4}[1]
|
|---|
| 528 | vmlal.u32 $D4,$R0,${R4}[1]
|
|---|
| 529 |
|
|---|
| 530 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 531 | @ lazy reduction as discussed in "NEON crypto" by D.J. Bernstein
|
|---|
| 532 | @ and P. Schwabe
|
|---|
| 533 | @
|
|---|
| 534 | @ H0>>+H1>>+H2>>+H3>>+H4
|
|---|
| 535 | @ H3>>+H4>>*5+H0>>+H1
|
|---|
| 536 | @
|
|---|
| 537 | @ Trivia.
|
|---|
| 538 | @
|
|---|
| 539 | @ Result of multiplication of n-bit number by m-bit number is
|
|---|
| 540 | @ n+m bits wide. However! Even though 2^n is a n+1-bit number,
|
|---|
| 541 | @ m-bit number multiplied by 2^n is still n+m bits wide.
|
|---|
| 542 | @
|
|---|
| 543 | @ Sum of two n-bit numbers is n+1 bits wide, sum of three - n+2,
|
|---|
| 544 | @ and so is sum of four. Sum of 2^m n-m-bit numbers and n-bit
|
|---|
| 545 | @ one is n+1 bits wide.
|
|---|
| 546 | @
|
|---|
| 547 | @ >>+ denotes Hnext += Hn>>26, Hn &= 0x3ffffff. This means that
|
|---|
| 548 | @ H0, H2, H3 are guaranteed to be 26 bits wide, while H1 and H4
|
|---|
| 549 | @ can be 27. However! In cases when their width exceeds 26 bits
|
|---|
| 550 | @ they are limited by 2^26+2^6. This in turn means that *sum*
|
|---|
| 551 | @ of the products with these values can still be viewed as sum
|
|---|
| 552 | @ of 52-bit numbers as long as the amount of addends is not a
|
|---|
| 553 | @ power of 2. For example,
|
|---|
| 554 | @
|
|---|
| 555 | @ H4 = H4*R0 + H3*R1 + H2*R2 + H1*R3 + H0 * R4,
|
|---|
| 556 | @
|
|---|
| 557 | @ which can't be larger than 5 * (2^26 + 2^6) * (2^26 + 2^6), or
|
|---|
| 558 | @ 5 * (2^52 + 2*2^32 + 2^12), which in turn is smaller than
|
|---|
| 559 | @ 8 * (2^52) or 2^55. However, the value is then multiplied by
|
|---|
| 560 | @ by 5, so we should be looking at 5 * 5 * (2^52 + 2^33 + 2^12),
|
|---|
| 561 | @ which is less than 32 * (2^52) or 2^57. And when processing
|
|---|
| 562 | @ data we are looking at triple as many addends...
|
|---|
| 563 | @
|
|---|
| 564 | @ In key setup procedure pre-reduced H0 is limited by 5*4+1 and
|
|---|
| 565 | @ 5*H4 - by 5*5 52-bit addends, or 57 bits. But when hashing the
|
|---|
| 566 | @ input H0 is limited by (5*4+1)*3 addends, or 58 bits, while
|
|---|
| 567 | @ 5*H4 by 5*5*3, or 59[!] bits. How is this relevant? vmlal.u32
|
|---|
| 568 | @ instruction accepts 2x32-bit input and writes 2x64-bit result.
|
|---|
| 569 | @ This means that result of reduction have to be compressed upon
|
|---|
| 570 | @ loop wrap-around. This can be done in the process of reduction
|
|---|
| 571 | @ to minimize amount of instructions [as well as amount of
|
|---|
| 572 | @ 128-bit instructions, which benefits low-end processors], but
|
|---|
| 573 | @ one has to watch for H2 (which is narrower than H0) and 5*H4
|
|---|
| 574 | @ not being wider than 58 bits, so that result of right shift
|
|---|
| 575 | @ by 26 bits fits in 32 bits. This is also useful on x86,
|
|---|
| 576 | @ because it allows to use paddd in place for paddq, which
|
|---|
| 577 | @ benefits Atom, where paddq is ridiculously slow.
|
|---|
| 578 |
|
|---|
| 579 | vshr.u64 $T0,$D3,#26
|
|---|
| 580 | vmovn.i64 $D3#lo,$D3
|
|---|
| 581 | vshr.u64 $T1,$D0,#26
|
|---|
| 582 | vmovn.i64 $D0#lo,$D0
|
|---|
| 583 | vadd.i64 $D4,$D4,$T0 @ h3 -> h4
|
|---|
| 584 | vbic.i32 $D3#lo,#0xfc000000 @ &=0x03ffffff
|
|---|
| 585 | vadd.i64 $D1,$D1,$T1 @ h0 -> h1
|
|---|
| 586 | vbic.i32 $D0#lo,#0xfc000000
|
|---|
| 587 |
|
|---|
| 588 | vshrn.u64 $T0#lo,$D4,#26
|
|---|
| 589 | vmovn.i64 $D4#lo,$D4
|
|---|
| 590 | vshr.u64 $T1,$D1,#26
|
|---|
| 591 | vmovn.i64 $D1#lo,$D1
|
|---|
| 592 | vadd.i64 $D2,$D2,$T1 @ h1 -> h2
|
|---|
| 593 | vbic.i32 $D4#lo,#0xfc000000
|
|---|
| 594 | vbic.i32 $D1#lo,#0xfc000000
|
|---|
| 595 |
|
|---|
| 596 | vadd.i32 $D0#lo,$D0#lo,$T0#lo
|
|---|
| 597 | vshl.u32 $T0#lo,$T0#lo,#2
|
|---|
| 598 | vshrn.u64 $T1#lo,$D2,#26
|
|---|
| 599 | vmovn.i64 $D2#lo,$D2
|
|---|
| 600 | vadd.i32 $D0#lo,$D0#lo,$T0#lo @ h4 -> h0
|
|---|
| 601 | vadd.i32 $D3#lo,$D3#lo,$T1#lo @ h2 -> h3
|
|---|
| 602 | vbic.i32 $D2#lo,#0xfc000000
|
|---|
| 603 |
|
|---|
| 604 | vshr.u32 $T0#lo,$D0#lo,#26
|
|---|
| 605 | vbic.i32 $D0#lo,#0xfc000000
|
|---|
| 606 | vshr.u32 $T1#lo,$D3#lo,#26
|
|---|
| 607 | vbic.i32 $D3#lo,#0xfc000000
|
|---|
| 608 | vadd.i32 $D1#lo,$D1#lo,$T0#lo @ h0 -> h1
|
|---|
| 609 | vadd.i32 $D4#lo,$D4#lo,$T1#lo @ h3 -> h4
|
|---|
| 610 |
|
|---|
| 611 | subs $zeros,$zeros,#1
|
|---|
| 612 | beq .Lsquare_break_neon
|
|---|
| 613 |
|
|---|
| 614 | add $tbl0,$ctx,#(48+0*9*4)
|
|---|
| 615 | add $tbl1,$ctx,#(48+1*9*4)
|
|---|
| 616 |
|
|---|
| 617 | vtrn.32 $R0,$D0#lo @ r^2:r^1
|
|---|
| 618 | vtrn.32 $R2,$D2#lo
|
|---|
| 619 | vtrn.32 $R3,$D3#lo
|
|---|
| 620 | vtrn.32 $R1,$D1#lo
|
|---|
| 621 | vtrn.32 $R4,$D4#lo
|
|---|
| 622 |
|
|---|
| 623 | vshl.u32 $S2,$R2,#2 @ *5
|
|---|
| 624 | vshl.u32 $S3,$R3,#2
|
|---|
| 625 | vshl.u32 $S1,$R1,#2
|
|---|
| 626 | vshl.u32 $S4,$R4,#2
|
|---|
| 627 | vadd.i32 $S2,$S2,$R2
|
|---|
| 628 | vadd.i32 $S1,$S1,$R1
|
|---|
| 629 | vadd.i32 $S3,$S3,$R3
|
|---|
| 630 | vadd.i32 $S4,$S4,$R4
|
|---|
| 631 |
|
|---|
| 632 | vst4.32 {${R0}[0],${R1}[0],${S1}[0],${R2}[0]},[$tbl0]!
|
|---|
| 633 | vst4.32 {${R0}[1],${R1}[1],${S1}[1],${R2}[1]},[$tbl1]!
|
|---|
| 634 | vst4.32 {${S2}[0],${R3}[0],${S3}[0],${R4}[0]},[$tbl0]!
|
|---|
| 635 | vst4.32 {${S2}[1],${R3}[1],${S3}[1],${R4}[1]},[$tbl1]!
|
|---|
| 636 | vst1.32 {${S4}[0]},[$tbl0,:32]
|
|---|
| 637 | vst1.32 {${S4}[1]},[$tbl1,:32]
|
|---|
| 638 |
|
|---|
| 639 | b .Lsquare_neon
|
|---|
| 640 |
|
|---|
| 641 | .align 4
|
|---|
| 642 | .Lsquare_break_neon:
|
|---|
| 643 | add $tbl0,$ctx,#(48+2*4*9)
|
|---|
| 644 | add $tbl1,$ctx,#(48+3*4*9)
|
|---|
| 645 |
|
|---|
| 646 | vmov $R0,$D0#lo @ r^4:r^3
|
|---|
| 647 | vshl.u32 $S1,$D1#lo,#2 @ *5
|
|---|
| 648 | vmov $R1,$D1#lo
|
|---|
| 649 | vshl.u32 $S2,$D2#lo,#2
|
|---|
| 650 | vmov $R2,$D2#lo
|
|---|
| 651 | vshl.u32 $S3,$D3#lo,#2
|
|---|
| 652 | vmov $R3,$D3#lo
|
|---|
| 653 | vshl.u32 $S4,$D4#lo,#2
|
|---|
| 654 | vmov $R4,$D4#lo
|
|---|
| 655 | vadd.i32 $S1,$S1,$D1#lo
|
|---|
| 656 | vadd.i32 $S2,$S2,$D2#lo
|
|---|
| 657 | vadd.i32 $S3,$S3,$D3#lo
|
|---|
| 658 | vadd.i32 $S4,$S4,$D4#lo
|
|---|
| 659 |
|
|---|
| 660 | vst4.32 {${R0}[0],${R1}[0],${S1}[0],${R2}[0]},[$tbl0]!
|
|---|
| 661 | vst4.32 {${R0}[1],${R1}[1],${S1}[1],${R2}[1]},[$tbl1]!
|
|---|
| 662 | vst4.32 {${S2}[0],${R3}[0],${S3}[0],${R4}[0]},[$tbl0]!
|
|---|
| 663 | vst4.32 {${S2}[1],${R3}[1],${S3}[1],${R4}[1]},[$tbl1]!
|
|---|
| 664 | vst1.32 {${S4}[0]},[$tbl0]
|
|---|
| 665 | vst1.32 {${S4}[1]},[$tbl1]
|
|---|
| 666 |
|
|---|
| 667 | ret @ bx lr
|
|---|
| 668 | .size poly1305_init_neon,.-poly1305_init_neon
|
|---|
| 669 |
|
|---|
| 670 | .type poly1305_blocks_neon,%function
|
|---|
| 671 | .align 5
|
|---|
| 672 | poly1305_blocks_neon:
|
|---|
| 673 | ldr ip,[$ctx,#36] @ is_base2_26
|
|---|
| 674 | ands $len,$len,#-16
|
|---|
| 675 | beq .Lno_data_neon
|
|---|
| 676 |
|
|---|
| 677 | cmp $len,#64
|
|---|
| 678 | bhs .Lenter_neon
|
|---|
| 679 | tst ip,ip @ is_base2_26?
|
|---|
| 680 | beq poly1305_blocks
|
|---|
| 681 |
|
|---|
| 682 | .Lenter_neon:
|
|---|
| 683 | stmdb sp!,{r4-r7}
|
|---|
| 684 | vstmdb sp!,{d8-d15} @ ABI specification says so
|
|---|
| 685 |
|
|---|
| 686 | tst ip,ip @ is_base2_26?
|
|---|
| 687 | bne .Lbase2_26_neon
|
|---|
| 688 |
|
|---|
| 689 | stmdb sp!,{r1-r3,lr}
|
|---|
| 690 | bl poly1305_init_neon
|
|---|
| 691 |
|
|---|
| 692 | ldr r4,[$ctx,#0] @ load hash value base 2^32
|
|---|
| 693 | ldr r5,[$ctx,#4]
|
|---|
| 694 | ldr r6,[$ctx,#8]
|
|---|
| 695 | ldr r7,[$ctx,#12]
|
|---|
| 696 | ldr ip,[$ctx,#16]
|
|---|
| 697 |
|
|---|
| 698 | and r2,r4,#0x03ffffff @ base 2^32 -> base 2^26
|
|---|
| 699 | mov r3,r4,lsr#26
|
|---|
| 700 | veor $D0#lo,$D0#lo,$D0#lo
|
|---|
| 701 | mov r4,r5,lsr#20
|
|---|
| 702 | orr r3,r3,r5,lsl#6
|
|---|
| 703 | veor $D1#lo,$D1#lo,$D1#lo
|
|---|
| 704 | mov r5,r6,lsr#14
|
|---|
| 705 | orr r4,r4,r6,lsl#12
|
|---|
| 706 | veor $D2#lo,$D2#lo,$D2#lo
|
|---|
| 707 | mov r6,r7,lsr#8
|
|---|
| 708 | orr r5,r5,r7,lsl#18
|
|---|
| 709 | veor $D3#lo,$D3#lo,$D3#lo
|
|---|
| 710 | and r3,r3,#0x03ffffff
|
|---|
| 711 | orr r6,r6,ip,lsl#24
|
|---|
| 712 | veor $D4#lo,$D4#lo,$D4#lo
|
|---|
| 713 | and r4,r4,#0x03ffffff
|
|---|
| 714 | mov r1,#1
|
|---|
| 715 | and r5,r5,#0x03ffffff
|
|---|
| 716 | str r1,[$ctx,#36] @ is_base2_26
|
|---|
| 717 |
|
|---|
| 718 | vmov.32 $D0#lo[0],r2
|
|---|
| 719 | vmov.32 $D1#lo[0],r3
|
|---|
| 720 | vmov.32 $D2#lo[0],r4
|
|---|
| 721 | vmov.32 $D3#lo[0],r5
|
|---|
| 722 | vmov.32 $D4#lo[0],r6
|
|---|
| 723 | adr $zeros,.Lzeros
|
|---|
| 724 |
|
|---|
| 725 | ldmia sp!,{r1-r3,lr}
|
|---|
| 726 | b .Lbase2_32_neon
|
|---|
| 727 |
|
|---|
| 728 | .align 4
|
|---|
| 729 | .Lbase2_26_neon:
|
|---|
| 730 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 731 | @ load hash value
|
|---|
| 732 |
|
|---|
| 733 | veor $D0#lo,$D0#lo,$D0#lo
|
|---|
| 734 | veor $D1#lo,$D1#lo,$D1#lo
|
|---|
| 735 | veor $D2#lo,$D2#lo,$D2#lo
|
|---|
| 736 | veor $D3#lo,$D3#lo,$D3#lo
|
|---|
| 737 | veor $D4#lo,$D4#lo,$D4#lo
|
|---|
| 738 | vld4.32 {$D0#lo[0],$D1#lo[0],$D2#lo[0],$D3#lo[0]},[$ctx]!
|
|---|
| 739 | adr $zeros,.Lzeros
|
|---|
| 740 | vld1.32 {$D4#lo[0]},[$ctx]
|
|---|
| 741 | sub $ctx,$ctx,#16 @ rewind
|
|---|
| 742 |
|
|---|
| 743 | .Lbase2_32_neon:
|
|---|
| 744 | add $in2,$inp,#32
|
|---|
| 745 | mov $padbit,$padbit,lsl#24
|
|---|
| 746 | tst $len,#31
|
|---|
| 747 | beq .Leven
|
|---|
| 748 |
|
|---|
| 749 | vld4.32 {$H0#lo[0],$H1#lo[0],$H2#lo[0],$H3#lo[0]},[$inp]!
|
|---|
| 750 | vmov.32 $H4#lo[0],$padbit
|
|---|
| 751 | sub $len,$len,#16
|
|---|
| 752 | add $in2,$inp,#32
|
|---|
| 753 |
|
|---|
| 754 | # ifdef __ARMEB__
|
|---|
| 755 | vrev32.8 $H0,$H0
|
|---|
| 756 | vrev32.8 $H3,$H3
|
|---|
| 757 | vrev32.8 $H1,$H1
|
|---|
| 758 | vrev32.8 $H2,$H2
|
|---|
| 759 | # endif
|
|---|
| 760 | vsri.u32 $H4#lo,$H3#lo,#8 @ base 2^32 -> base 2^26
|
|---|
| 761 | vshl.u32 $H3#lo,$H3#lo,#18
|
|---|
| 762 |
|
|---|
| 763 | vsri.u32 $H3#lo,$H2#lo,#14
|
|---|
| 764 | vshl.u32 $H2#lo,$H2#lo,#12
|
|---|
| 765 | vadd.i32 $H4#hi,$H4#lo,$D4#lo @ add hash value and move to #hi
|
|---|
| 766 |
|
|---|
| 767 | vbic.i32 $H3#lo,#0xfc000000
|
|---|
| 768 | vsri.u32 $H2#lo,$H1#lo,#20
|
|---|
| 769 | vshl.u32 $H1#lo,$H1#lo,#6
|
|---|
| 770 |
|
|---|
| 771 | vbic.i32 $H2#lo,#0xfc000000
|
|---|
| 772 | vsri.u32 $H1#lo,$H0#lo,#26
|
|---|
| 773 | vadd.i32 $H3#hi,$H3#lo,$D3#lo
|
|---|
| 774 |
|
|---|
| 775 | vbic.i32 $H0#lo,#0xfc000000
|
|---|
| 776 | vbic.i32 $H1#lo,#0xfc000000
|
|---|
| 777 | vadd.i32 $H2#hi,$H2#lo,$D2#lo
|
|---|
| 778 |
|
|---|
| 779 | vadd.i32 $H0#hi,$H0#lo,$D0#lo
|
|---|
| 780 | vadd.i32 $H1#hi,$H1#lo,$D1#lo
|
|---|
| 781 |
|
|---|
| 782 | mov $tbl1,$zeros
|
|---|
| 783 | add $tbl0,$ctx,#48
|
|---|
| 784 |
|
|---|
| 785 | cmp $len,$len
|
|---|
| 786 | b .Long_tail
|
|---|
| 787 |
|
|---|
| 788 | .align 4
|
|---|
| 789 | .Leven:
|
|---|
| 790 | subs $len,$len,#64
|
|---|
| 791 | it lo
|
|---|
| 792 | movlo $in2,$zeros
|
|---|
| 793 |
|
|---|
| 794 | vmov.i32 $H4,#1<<24 @ padbit, yes, always
|
|---|
| 795 | vld4.32 {$H0#lo,$H1#lo,$H2#lo,$H3#lo},[$inp] @ inp[0:1]
|
|---|
| 796 | add $inp,$inp,#64
|
|---|
| 797 | vld4.32 {$H0#hi,$H1#hi,$H2#hi,$H3#hi},[$in2] @ inp[2:3] (or 0)
|
|---|
| 798 | add $in2,$in2,#64
|
|---|
| 799 | itt hi
|
|---|
| 800 | addhi $tbl1,$ctx,#(48+1*9*4)
|
|---|
| 801 | addhi $tbl0,$ctx,#(48+3*9*4)
|
|---|
| 802 |
|
|---|
| 803 | # ifdef __ARMEB__
|
|---|
| 804 | vrev32.8 $H0,$H0
|
|---|
| 805 | vrev32.8 $H3,$H3
|
|---|
| 806 | vrev32.8 $H1,$H1
|
|---|
| 807 | vrev32.8 $H2,$H2
|
|---|
| 808 | # endif
|
|---|
| 809 | vsri.u32 $H4,$H3,#8 @ base 2^32 -> base 2^26
|
|---|
| 810 | vshl.u32 $H3,$H3,#18
|
|---|
| 811 |
|
|---|
| 812 | vsri.u32 $H3,$H2,#14
|
|---|
| 813 | vshl.u32 $H2,$H2,#12
|
|---|
| 814 |
|
|---|
| 815 | vbic.i32 $H3,#0xfc000000
|
|---|
| 816 | vsri.u32 $H2,$H1,#20
|
|---|
| 817 | vshl.u32 $H1,$H1,#6
|
|---|
| 818 |
|
|---|
| 819 | vbic.i32 $H2,#0xfc000000
|
|---|
| 820 | vsri.u32 $H1,$H0,#26
|
|---|
| 821 |
|
|---|
| 822 | vbic.i32 $H0,#0xfc000000
|
|---|
| 823 | vbic.i32 $H1,#0xfc000000
|
|---|
| 824 |
|
|---|
| 825 | bls .Lskip_loop
|
|---|
| 826 |
|
|---|
| 827 | vld4.32 {${R0}[1],${R1}[1],${S1}[1],${R2}[1]},[$tbl1]! @ load r^2
|
|---|
| 828 | vld4.32 {${R0}[0],${R1}[0],${S1}[0],${R2}[0]},[$tbl0]! @ load r^4
|
|---|
| 829 | vld4.32 {${S2}[1],${R3}[1],${S3}[1],${R4}[1]},[$tbl1]!
|
|---|
| 830 | vld4.32 {${S2}[0],${R3}[0],${S3}[0],${R4}[0]},[$tbl0]!
|
|---|
| 831 | b .Loop_neon
|
|---|
| 832 |
|
|---|
| 833 | .align 5
|
|---|
| 834 | .Loop_neon:
|
|---|
| 835 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 836 | @ ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2
|
|---|
| 837 | @ ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^3+inp[7]*r
|
|---|
| 838 | @ \___________________/
|
|---|
| 839 | @ ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2+inp[8])*r^2
|
|---|
| 840 | @ ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^4+inp[7]*r^2+inp[9])*r
|
|---|
| 841 | @ \___________________/ \____________________/
|
|---|
| 842 | @
|
|---|
| 843 | @ Note that we start with inp[2:3]*r^2. This is because it
|
|---|
| 844 | @ doesn't depend on reduction in previous iteration.
|
|---|
| 845 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 846 | @ d4 = h4*r0 + h3*r1 + h2*r2 + h1*r3 + h0*r4
|
|---|
| 847 | @ d3 = h3*r0 + h2*r1 + h1*r2 + h0*r3 + h4*5*r4
|
|---|
| 848 | @ d2 = h2*r0 + h1*r1 + h0*r2 + h4*5*r3 + h3*5*r4
|
|---|
| 849 | @ d1 = h1*r0 + h0*r1 + h4*5*r2 + h3*5*r3 + h2*5*r4
|
|---|
| 850 | @ d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
|
|---|
| 851 |
|
|---|
| 852 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 853 | @ inp[2:3]*r^2
|
|---|
| 854 |
|
|---|
| 855 | vadd.i32 $H2#lo,$H2#lo,$D2#lo @ accumulate inp[0:1]
|
|---|
| 856 | vmull.u32 $D2,$H2#hi,${R0}[1]
|
|---|
| 857 | vadd.i32 $H0#lo,$H0#lo,$D0#lo
|
|---|
| 858 | vmull.u32 $D0,$H0#hi,${R0}[1]
|
|---|
| 859 | vadd.i32 $H3#lo,$H3#lo,$D3#lo
|
|---|
| 860 | vmull.u32 $D3,$H3#hi,${R0}[1]
|
|---|
| 861 | vmlal.u32 $D2,$H1#hi,${R1}[1]
|
|---|
| 862 | vadd.i32 $H1#lo,$H1#lo,$D1#lo
|
|---|
| 863 | vmull.u32 $D1,$H1#hi,${R0}[1]
|
|---|
| 864 |
|
|---|
| 865 | vadd.i32 $H4#lo,$H4#lo,$D4#lo
|
|---|
| 866 | vmull.u32 $D4,$H4#hi,${R0}[1]
|
|---|
| 867 | subs $len,$len,#64
|
|---|
| 868 | vmlal.u32 $D0,$H4#hi,${S1}[1]
|
|---|
| 869 | it lo
|
|---|
| 870 | movlo $in2,$zeros
|
|---|
| 871 | vmlal.u32 $D3,$H2#hi,${R1}[1]
|
|---|
| 872 | vld1.32 ${S4}[1],[$tbl1,:32]
|
|---|
| 873 | vmlal.u32 $D1,$H0#hi,${R1}[1]
|
|---|
| 874 | vmlal.u32 $D4,$H3#hi,${R1}[1]
|
|---|
| 875 |
|
|---|
| 876 | vmlal.u32 $D0,$H3#hi,${S2}[1]
|
|---|
| 877 | vmlal.u32 $D3,$H1#hi,${R2}[1]
|
|---|
| 878 | vmlal.u32 $D4,$H2#hi,${R2}[1]
|
|---|
| 879 | vmlal.u32 $D1,$H4#hi,${S2}[1]
|
|---|
| 880 | vmlal.u32 $D2,$H0#hi,${R2}[1]
|
|---|
| 881 |
|
|---|
| 882 | vmlal.u32 $D3,$H0#hi,${R3}[1]
|
|---|
| 883 | vmlal.u32 $D0,$H2#hi,${S3}[1]
|
|---|
| 884 | vmlal.u32 $D4,$H1#hi,${R3}[1]
|
|---|
| 885 | vmlal.u32 $D1,$H3#hi,${S3}[1]
|
|---|
| 886 | vmlal.u32 $D2,$H4#hi,${S3}[1]
|
|---|
| 887 |
|
|---|
| 888 | vmlal.u32 $D3,$H4#hi,${S4}[1]
|
|---|
| 889 | vmlal.u32 $D0,$H1#hi,${S4}[1]
|
|---|
| 890 | vmlal.u32 $D4,$H0#hi,${R4}[1]
|
|---|
| 891 | vmlal.u32 $D1,$H2#hi,${S4}[1]
|
|---|
| 892 | vmlal.u32 $D2,$H3#hi,${S4}[1]
|
|---|
| 893 |
|
|---|
| 894 | vld4.32 {$H0#hi,$H1#hi,$H2#hi,$H3#hi},[$in2] @ inp[2:3] (or 0)
|
|---|
| 895 | add $in2,$in2,#64
|
|---|
| 896 |
|
|---|
| 897 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 898 | @ (hash+inp[0:1])*r^4 and accumulate
|
|---|
| 899 |
|
|---|
| 900 | vmlal.u32 $D3,$H3#lo,${R0}[0]
|
|---|
| 901 | vmlal.u32 $D0,$H0#lo,${R0}[0]
|
|---|
| 902 | vmlal.u32 $D4,$H4#lo,${R0}[0]
|
|---|
| 903 | vmlal.u32 $D1,$H1#lo,${R0}[0]
|
|---|
| 904 | vmlal.u32 $D2,$H2#lo,${R0}[0]
|
|---|
| 905 | vld1.32 ${S4}[0],[$tbl0,:32]
|
|---|
| 906 |
|
|---|
| 907 | vmlal.u32 $D3,$H2#lo,${R1}[0]
|
|---|
| 908 | vmlal.u32 $D0,$H4#lo,${S1}[0]
|
|---|
| 909 | vmlal.u32 $D4,$H3#lo,${R1}[0]
|
|---|
| 910 | vmlal.u32 $D1,$H0#lo,${R1}[0]
|
|---|
| 911 | vmlal.u32 $D2,$H1#lo,${R1}[0]
|
|---|
| 912 |
|
|---|
| 913 | vmlal.u32 $D3,$H1#lo,${R2}[0]
|
|---|
| 914 | vmlal.u32 $D0,$H3#lo,${S2}[0]
|
|---|
| 915 | vmlal.u32 $D4,$H2#lo,${R2}[0]
|
|---|
| 916 | vmlal.u32 $D1,$H4#lo,${S2}[0]
|
|---|
| 917 | vmlal.u32 $D2,$H0#lo,${R2}[0]
|
|---|
| 918 |
|
|---|
| 919 | vmlal.u32 $D3,$H0#lo,${R3}[0]
|
|---|
| 920 | vmlal.u32 $D0,$H2#lo,${S3}[0]
|
|---|
| 921 | vmlal.u32 $D4,$H1#lo,${R3}[0]
|
|---|
| 922 | vmlal.u32 $D1,$H3#lo,${S3}[0]
|
|---|
| 923 | vmlal.u32 $D3,$H4#lo,${S4}[0]
|
|---|
| 924 |
|
|---|
| 925 | vmlal.u32 $D2,$H4#lo,${S3}[0]
|
|---|
| 926 | vmlal.u32 $D0,$H1#lo,${S4}[0]
|
|---|
| 927 | vmlal.u32 $D4,$H0#lo,${R4}[0]
|
|---|
| 928 | vmov.i32 $H4,#1<<24 @ padbit, yes, always
|
|---|
| 929 | vmlal.u32 $D1,$H2#lo,${S4}[0]
|
|---|
| 930 | vmlal.u32 $D2,$H3#lo,${S4}[0]
|
|---|
| 931 |
|
|---|
| 932 | vld4.32 {$H0#lo,$H1#lo,$H2#lo,$H3#lo},[$inp] @ inp[0:1]
|
|---|
| 933 | add $inp,$inp,#64
|
|---|
| 934 | # ifdef __ARMEB__
|
|---|
| 935 | vrev32.8 $H0,$H0
|
|---|
| 936 | vrev32.8 $H1,$H1
|
|---|
| 937 | vrev32.8 $H2,$H2
|
|---|
| 938 | vrev32.8 $H3,$H3
|
|---|
| 939 | # endif
|
|---|
| 940 |
|
|---|
| 941 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 942 | @ lazy reduction interleaved with base 2^32 -> base 2^26 of
|
|---|
| 943 | @ inp[0:3] previously loaded to $H0-$H3 and smashed to $H0-$H4.
|
|---|
| 944 |
|
|---|
| 945 | vshr.u64 $T0,$D3,#26
|
|---|
| 946 | vmovn.i64 $D3#lo,$D3
|
|---|
| 947 | vshr.u64 $T1,$D0,#26
|
|---|
| 948 | vmovn.i64 $D0#lo,$D0
|
|---|
| 949 | vadd.i64 $D4,$D4,$T0 @ h3 -> h4
|
|---|
| 950 | vbic.i32 $D3#lo,#0xfc000000
|
|---|
| 951 | vsri.u32 $H4,$H3,#8 @ base 2^32 -> base 2^26
|
|---|
| 952 | vadd.i64 $D1,$D1,$T1 @ h0 -> h1
|
|---|
| 953 | vshl.u32 $H3,$H3,#18
|
|---|
| 954 | vbic.i32 $D0#lo,#0xfc000000
|
|---|
| 955 |
|
|---|
| 956 | vshrn.u64 $T0#lo,$D4,#26
|
|---|
| 957 | vmovn.i64 $D4#lo,$D4
|
|---|
| 958 | vshr.u64 $T1,$D1,#26
|
|---|
| 959 | vmovn.i64 $D1#lo,$D1
|
|---|
| 960 | vadd.i64 $D2,$D2,$T1 @ h1 -> h2
|
|---|
| 961 | vsri.u32 $H3,$H2,#14
|
|---|
| 962 | vbic.i32 $D4#lo,#0xfc000000
|
|---|
| 963 | vshl.u32 $H2,$H2,#12
|
|---|
| 964 | vbic.i32 $D1#lo,#0xfc000000
|
|---|
| 965 |
|
|---|
| 966 | vadd.i32 $D0#lo,$D0#lo,$T0#lo
|
|---|
| 967 | vshl.u32 $T0#lo,$T0#lo,#2
|
|---|
| 968 | vbic.i32 $H3,#0xfc000000
|
|---|
| 969 | vshrn.u64 $T1#lo,$D2,#26
|
|---|
| 970 | vmovn.i64 $D2#lo,$D2
|
|---|
| 971 | vaddl.u32 $D0,$D0#lo,$T0#lo @ h4 -> h0 [widen for a sec]
|
|---|
| 972 | vsri.u32 $H2,$H1,#20
|
|---|
| 973 | vadd.i32 $D3#lo,$D3#lo,$T1#lo @ h2 -> h3
|
|---|
| 974 | vshl.u32 $H1,$H1,#6
|
|---|
| 975 | vbic.i32 $D2#lo,#0xfc000000
|
|---|
| 976 | vbic.i32 $H2,#0xfc000000
|
|---|
| 977 |
|
|---|
| 978 | vshrn.u64 $T0#lo,$D0,#26 @ re-narrow
|
|---|
| 979 | vmovn.i64 $D0#lo,$D0
|
|---|
| 980 | vsri.u32 $H1,$H0,#26
|
|---|
| 981 | vbic.i32 $H0,#0xfc000000
|
|---|
| 982 | vshr.u32 $T1#lo,$D3#lo,#26
|
|---|
| 983 | vbic.i32 $D3#lo,#0xfc000000
|
|---|
| 984 | vbic.i32 $D0#lo,#0xfc000000
|
|---|
| 985 | vadd.i32 $D1#lo,$D1#lo,$T0#lo @ h0 -> h1
|
|---|
| 986 | vadd.i32 $D4#lo,$D4#lo,$T1#lo @ h3 -> h4
|
|---|
| 987 | vbic.i32 $H1,#0xfc000000
|
|---|
| 988 |
|
|---|
| 989 | bhi .Loop_neon
|
|---|
| 990 |
|
|---|
| 991 | .Lskip_loop:
|
|---|
| 992 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 993 | @ multiply (inp[0:1]+hash) or inp[2:3] by r^2:r^1
|
|---|
| 994 |
|
|---|
| 995 | add $tbl1,$ctx,#(48+0*9*4)
|
|---|
| 996 | add $tbl0,$ctx,#(48+1*9*4)
|
|---|
| 997 | adds $len,$len,#32
|
|---|
| 998 | it ne
|
|---|
| 999 | movne $len,#0
|
|---|
| 1000 | bne .Long_tail
|
|---|
| 1001 |
|
|---|
| 1002 | vadd.i32 $H2#hi,$H2#lo,$D2#lo @ add hash value and move to #hi
|
|---|
| 1003 | vadd.i32 $H0#hi,$H0#lo,$D0#lo
|
|---|
| 1004 | vadd.i32 $H3#hi,$H3#lo,$D3#lo
|
|---|
| 1005 | vadd.i32 $H1#hi,$H1#lo,$D1#lo
|
|---|
| 1006 | vadd.i32 $H4#hi,$H4#lo,$D4#lo
|
|---|
| 1007 |
|
|---|
| 1008 | .Long_tail:
|
|---|
| 1009 | vld4.32 {${R0}[1],${R1}[1],${S1}[1],${R2}[1]},[$tbl1]! @ load r^1
|
|---|
| 1010 | vld4.32 {${R0}[0],${R1}[0],${S1}[0],${R2}[0]},[$tbl0]! @ load r^2
|
|---|
| 1011 |
|
|---|
| 1012 | vadd.i32 $H2#lo,$H2#lo,$D2#lo @ can be redundant
|
|---|
| 1013 | vmull.u32 $D2,$H2#hi,$R0
|
|---|
| 1014 | vadd.i32 $H0#lo,$H0#lo,$D0#lo
|
|---|
| 1015 | vmull.u32 $D0,$H0#hi,$R0
|
|---|
| 1016 | vadd.i32 $H3#lo,$H3#lo,$D3#lo
|
|---|
| 1017 | vmull.u32 $D3,$H3#hi,$R0
|
|---|
| 1018 | vadd.i32 $H1#lo,$H1#lo,$D1#lo
|
|---|
| 1019 | vmull.u32 $D1,$H1#hi,$R0
|
|---|
| 1020 | vadd.i32 $H4#lo,$H4#lo,$D4#lo
|
|---|
| 1021 | vmull.u32 $D4,$H4#hi,$R0
|
|---|
| 1022 |
|
|---|
| 1023 | vmlal.u32 $D0,$H4#hi,$S1
|
|---|
| 1024 | vld4.32 {${S2}[1],${R3}[1],${S3}[1],${R4}[1]},[$tbl1]!
|
|---|
| 1025 | vmlal.u32 $D3,$H2#hi,$R1
|
|---|
| 1026 | vld4.32 {${S2}[0],${R3}[0],${S3}[0],${R4}[0]},[$tbl0]!
|
|---|
| 1027 | vmlal.u32 $D1,$H0#hi,$R1
|
|---|
| 1028 | vmlal.u32 $D4,$H3#hi,$R1
|
|---|
| 1029 | vmlal.u32 $D2,$H1#hi,$R1
|
|---|
| 1030 |
|
|---|
| 1031 | vmlal.u32 $D3,$H1#hi,$R2
|
|---|
| 1032 | vld1.32 ${S4}[1],[$tbl1,:32]
|
|---|
| 1033 | vmlal.u32 $D0,$H3#hi,$S2
|
|---|
| 1034 | vld1.32 ${S4}[0],[$tbl0,:32]
|
|---|
| 1035 | vmlal.u32 $D4,$H2#hi,$R2
|
|---|
| 1036 | vmlal.u32 $D1,$H4#hi,$S2
|
|---|
| 1037 | vmlal.u32 $D2,$H0#hi,$R2
|
|---|
| 1038 |
|
|---|
| 1039 | vmlal.u32 $D3,$H0#hi,$R3
|
|---|
| 1040 | it ne
|
|---|
| 1041 | addne $tbl1,$ctx,#(48+2*9*4)
|
|---|
| 1042 | vmlal.u32 $D0,$H2#hi,$S3
|
|---|
| 1043 | it ne
|
|---|
| 1044 | addne $tbl0,$ctx,#(48+3*9*4)
|
|---|
| 1045 | vmlal.u32 $D4,$H1#hi,$R3
|
|---|
| 1046 | vmlal.u32 $D1,$H3#hi,$S3
|
|---|
| 1047 | vmlal.u32 $D2,$H4#hi,$S3
|
|---|
| 1048 |
|
|---|
| 1049 | vmlal.u32 $D3,$H4#hi,$S4
|
|---|
| 1050 | vorn $MASK,$MASK,$MASK @ all-ones, can be redundant
|
|---|
| 1051 | vmlal.u32 $D0,$H1#hi,$S4
|
|---|
| 1052 | vshr.u64 $MASK,$MASK,#38
|
|---|
| 1053 | vmlal.u32 $D4,$H0#hi,$R4
|
|---|
| 1054 | vmlal.u32 $D1,$H2#hi,$S4
|
|---|
| 1055 | vmlal.u32 $D2,$H3#hi,$S4
|
|---|
| 1056 |
|
|---|
| 1057 | beq .Lshort_tail
|
|---|
| 1058 |
|
|---|
| 1059 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1060 | @ (hash+inp[0:1])*r^4:r^3 and accumulate
|
|---|
| 1061 |
|
|---|
| 1062 | vld4.32 {${R0}[1],${R1}[1],${S1}[1],${R2}[1]},[$tbl1]! @ load r^3
|
|---|
| 1063 | vld4.32 {${R0}[0],${R1}[0],${S1}[0],${R2}[0]},[$tbl0]! @ load r^4
|
|---|
| 1064 |
|
|---|
| 1065 | vmlal.u32 $D2,$H2#lo,$R0
|
|---|
| 1066 | vmlal.u32 $D0,$H0#lo,$R0
|
|---|
| 1067 | vmlal.u32 $D3,$H3#lo,$R0
|
|---|
| 1068 | vmlal.u32 $D1,$H1#lo,$R0
|
|---|
| 1069 | vmlal.u32 $D4,$H4#lo,$R0
|
|---|
| 1070 |
|
|---|
| 1071 | vmlal.u32 $D0,$H4#lo,$S1
|
|---|
| 1072 | vld4.32 {${S2}[1],${R3}[1],${S3}[1],${R4}[1]},[$tbl1]!
|
|---|
| 1073 | vmlal.u32 $D3,$H2#lo,$R1
|
|---|
| 1074 | vld4.32 {${S2}[0],${R3}[0],${S3}[0],${R4}[0]},[$tbl0]!
|
|---|
| 1075 | vmlal.u32 $D1,$H0#lo,$R1
|
|---|
| 1076 | vmlal.u32 $D4,$H3#lo,$R1
|
|---|
| 1077 | vmlal.u32 $D2,$H1#lo,$R1
|
|---|
| 1078 |
|
|---|
| 1079 | vmlal.u32 $D3,$H1#lo,$R2
|
|---|
| 1080 | vld1.32 ${S4}[1],[$tbl1,:32]
|
|---|
| 1081 | vmlal.u32 $D0,$H3#lo,$S2
|
|---|
| 1082 | vld1.32 ${S4}[0],[$tbl0,:32]
|
|---|
| 1083 | vmlal.u32 $D4,$H2#lo,$R2
|
|---|
| 1084 | vmlal.u32 $D1,$H4#lo,$S2
|
|---|
| 1085 | vmlal.u32 $D2,$H0#lo,$R2
|
|---|
| 1086 |
|
|---|
| 1087 | vmlal.u32 $D3,$H0#lo,$R3
|
|---|
| 1088 | vmlal.u32 $D0,$H2#lo,$S3
|
|---|
| 1089 | vmlal.u32 $D4,$H1#lo,$R3
|
|---|
| 1090 | vmlal.u32 $D1,$H3#lo,$S3
|
|---|
| 1091 | vmlal.u32 $D2,$H4#lo,$S3
|
|---|
| 1092 |
|
|---|
| 1093 | vmlal.u32 $D3,$H4#lo,$S4
|
|---|
| 1094 | vorn $MASK,$MASK,$MASK @ all-ones
|
|---|
| 1095 | vmlal.u32 $D0,$H1#lo,$S4
|
|---|
| 1096 | vshr.u64 $MASK,$MASK,#38
|
|---|
| 1097 | vmlal.u32 $D4,$H0#lo,$R4
|
|---|
| 1098 | vmlal.u32 $D1,$H2#lo,$S4
|
|---|
| 1099 | vmlal.u32 $D2,$H3#lo,$S4
|
|---|
| 1100 |
|
|---|
| 1101 | .Lshort_tail:
|
|---|
| 1102 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1103 | @ horizontal addition
|
|---|
| 1104 |
|
|---|
| 1105 | vadd.i64 $D3#lo,$D3#lo,$D3#hi
|
|---|
| 1106 | vadd.i64 $D0#lo,$D0#lo,$D0#hi
|
|---|
| 1107 | vadd.i64 $D4#lo,$D4#lo,$D4#hi
|
|---|
| 1108 | vadd.i64 $D1#lo,$D1#lo,$D1#hi
|
|---|
| 1109 | vadd.i64 $D2#lo,$D2#lo,$D2#hi
|
|---|
| 1110 |
|
|---|
| 1111 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1112 | @ lazy reduction, but without narrowing
|
|---|
| 1113 |
|
|---|
| 1114 | vshr.u64 $T0,$D3,#26
|
|---|
| 1115 | vand.i64 $D3,$D3,$MASK
|
|---|
| 1116 | vshr.u64 $T1,$D0,#26
|
|---|
| 1117 | vand.i64 $D0,$D0,$MASK
|
|---|
| 1118 | vadd.i64 $D4,$D4,$T0 @ h3 -> h4
|
|---|
| 1119 | vadd.i64 $D1,$D1,$T1 @ h0 -> h1
|
|---|
| 1120 |
|
|---|
| 1121 | vshr.u64 $T0,$D4,#26
|
|---|
| 1122 | vand.i64 $D4,$D4,$MASK
|
|---|
| 1123 | vshr.u64 $T1,$D1,#26
|
|---|
| 1124 | vand.i64 $D1,$D1,$MASK
|
|---|
| 1125 | vadd.i64 $D2,$D2,$T1 @ h1 -> h2
|
|---|
| 1126 |
|
|---|
| 1127 | vadd.i64 $D0,$D0,$T0
|
|---|
| 1128 | vshl.u64 $T0,$T0,#2
|
|---|
| 1129 | vshr.u64 $T1,$D2,#26
|
|---|
| 1130 | vand.i64 $D2,$D2,$MASK
|
|---|
| 1131 | vadd.i64 $D0,$D0,$T0 @ h4 -> h0
|
|---|
| 1132 | vadd.i64 $D3,$D3,$T1 @ h2 -> h3
|
|---|
| 1133 |
|
|---|
| 1134 | vshr.u64 $T0,$D0,#26
|
|---|
| 1135 | vand.i64 $D0,$D0,$MASK
|
|---|
| 1136 | vshr.u64 $T1,$D3,#26
|
|---|
| 1137 | vand.i64 $D3,$D3,$MASK
|
|---|
| 1138 | vadd.i64 $D1,$D1,$T0 @ h0 -> h1
|
|---|
| 1139 | vadd.i64 $D4,$D4,$T1 @ h3 -> h4
|
|---|
| 1140 |
|
|---|
| 1141 | cmp $len,#0
|
|---|
| 1142 | bne .Leven
|
|---|
| 1143 |
|
|---|
| 1144 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1145 | @ store hash value
|
|---|
| 1146 |
|
|---|
| 1147 | vst4.32 {$D0#lo[0],$D1#lo[0],$D2#lo[0],$D3#lo[0]},[$ctx]!
|
|---|
| 1148 | vst1.32 {$D4#lo[0]},[$ctx]
|
|---|
| 1149 |
|
|---|
| 1150 | vldmia sp!,{d8-d15} @ epilogue
|
|---|
| 1151 | ldmia sp!,{r4-r7}
|
|---|
| 1152 | .Lno_data_neon:
|
|---|
| 1153 | ret @ bx lr
|
|---|
| 1154 | .size poly1305_blocks_neon,.-poly1305_blocks_neon
|
|---|
| 1155 |
|
|---|
| 1156 | .type poly1305_emit_neon,%function
|
|---|
| 1157 | .align 5
|
|---|
| 1158 | poly1305_emit_neon:
|
|---|
| 1159 | ldr ip,[$ctx,#36] @ is_base2_26
|
|---|
| 1160 |
|
|---|
| 1161 | stmdb sp!,{r4-r11}
|
|---|
| 1162 |
|
|---|
| 1163 | tst ip,ip
|
|---|
| 1164 | beq .Lpoly1305_emit_enter
|
|---|
| 1165 |
|
|---|
| 1166 | ldmia $ctx,{$h0-$h4}
|
|---|
| 1167 | eor $g0,$g0,$g0
|
|---|
| 1168 |
|
|---|
| 1169 | adds $h0,$h0,$h1,lsl#26 @ base 2^26 -> base 2^32
|
|---|
| 1170 | mov $h1,$h1,lsr#6
|
|---|
| 1171 | adcs $h1,$h1,$h2,lsl#20
|
|---|
| 1172 | mov $h2,$h2,lsr#12
|
|---|
| 1173 | adcs $h2,$h2,$h3,lsl#14
|
|---|
| 1174 | mov $h3,$h3,lsr#18
|
|---|
| 1175 | adcs $h3,$h3,$h4,lsl#8
|
|---|
| 1176 | adc $h4,$g0,$h4,lsr#24 @ can be partially reduced ...
|
|---|
| 1177 |
|
|---|
| 1178 | and $g0,$h4,#-4 @ ... so reduce
|
|---|
| 1179 | and $h4,$h3,#3
|
|---|
| 1180 | add $g0,$g0,$g0,lsr#2 @ *= 5
|
|---|
| 1181 | adds $h0,$h0,$g0
|
|---|
| 1182 | adcs $h1,$h1,#0
|
|---|
| 1183 | adcs $h2,$h2,#0
|
|---|
| 1184 | adcs $h3,$h3,#0
|
|---|
| 1185 | adc $h4,$h4,#0
|
|---|
| 1186 |
|
|---|
| 1187 | adds $g0,$h0,#5 @ compare to modulus
|
|---|
| 1188 | adcs $g1,$h1,#0
|
|---|
| 1189 | adcs $g2,$h2,#0
|
|---|
| 1190 | adcs $g3,$h3,#0
|
|---|
| 1191 | adc $g4,$h4,#0
|
|---|
| 1192 | tst $g4,#4 @ did it carry/borrow?
|
|---|
| 1193 |
|
|---|
| 1194 | it ne
|
|---|
| 1195 | movne $h0,$g0
|
|---|
| 1196 | ldr $g0,[$nonce,#0]
|
|---|
| 1197 | it ne
|
|---|
| 1198 | movne $h1,$g1
|
|---|
| 1199 | ldr $g1,[$nonce,#4]
|
|---|
| 1200 | it ne
|
|---|
| 1201 | movne $h2,$g2
|
|---|
| 1202 | ldr $g2,[$nonce,#8]
|
|---|
| 1203 | it ne
|
|---|
| 1204 | movne $h3,$g3
|
|---|
| 1205 | ldr $g3,[$nonce,#12]
|
|---|
| 1206 |
|
|---|
| 1207 | adds $h0,$h0,$g0 @ accumulate nonce
|
|---|
| 1208 | adcs $h1,$h1,$g1
|
|---|
| 1209 | adcs $h2,$h2,$g2
|
|---|
| 1210 | adc $h3,$h3,$g3
|
|---|
| 1211 |
|
|---|
| 1212 | # ifdef __ARMEB__
|
|---|
| 1213 | rev $h0,$h0
|
|---|
| 1214 | rev $h1,$h1
|
|---|
| 1215 | rev $h2,$h2
|
|---|
| 1216 | rev $h3,$h3
|
|---|
| 1217 | # endif
|
|---|
| 1218 | str $h0,[$mac,#0] @ store the result
|
|---|
| 1219 | str $h1,[$mac,#4]
|
|---|
| 1220 | str $h2,[$mac,#8]
|
|---|
| 1221 | str $h3,[$mac,#12]
|
|---|
| 1222 |
|
|---|
| 1223 | ldmia sp!,{r4-r11}
|
|---|
| 1224 | ret @ bx lr
|
|---|
| 1225 | .size poly1305_emit_neon,.-poly1305_emit_neon
|
|---|
| 1226 |
|
|---|
| 1227 | .align 5
|
|---|
| 1228 | .Lzeros:
|
|---|
| 1229 | .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
|---|
| 1230 | .LOPENSSL_armcap:
|
|---|
| 1231 | .word OPENSSL_armcap_P-.Lpoly1305_init
|
|---|
| 1232 | #endif
|
|---|
| 1233 | ___
|
|---|
| 1234 | } }
|
|---|
| 1235 | $code.=<<___;
|
|---|
| 1236 | .asciz "Poly1305 for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
|
|---|
| 1237 | .align 2
|
|---|
| 1238 | #if __ARM_MAX_ARCH__>=7
|
|---|
| 1239 | .comm OPENSSL_armcap_P,4,4
|
|---|
| 1240 | #endif
|
|---|
| 1241 | ___
|
|---|
| 1242 |
|
|---|
| 1243 | foreach (split("\n",$code)) {
|
|---|
| 1244 | s/\`([^\`]*)\`/eval $1/geo;
|
|---|
| 1245 |
|
|---|
| 1246 | s/\bq([0-9]+)#(lo|hi)/sprintf "d%d",2*$1+($2 eq "hi")/geo or
|
|---|
| 1247 | s/\bret\b/bx lr/go or
|
|---|
| 1248 | s/\bbx\s+lr\b/.word\t0xe12fff1e/go; # make it possible to compile with -march=armv4
|
|---|
| 1249 |
|
|---|
| 1250 | print $_,"\n";
|
|---|
| 1251 | }
|
|---|
| 1252 | close STDOUT; # enforce flush
|
|---|
