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| #!/usr/bin/env perl
| # SPDX-License-Identifier: GPL-1.0+ OR BSD-3-Clause
| #
| # ====================================================================
| # Written by Andy Polyakov, @dot-asm, initially for the OpenSSL
| # project.
| # ====================================================================
| #
| # This module implements Poly1305 hash for ARMv8.
| #
| # June 2015
| #
| # Numbers are cycles per processed byte with poly1305_blocks alone.
| #
| # IALU/gcc-4.9 NEON
| #
| # Apple A7 1.86/+5% 0.72
| # Cortex-A53 2.69/+58% 1.47
| # Cortex-A57 2.70/+7% 1.14
| # Denver 1.64/+50% 1.18(*)
| # X-Gene 2.13/+68% 2.27
| # Mongoose 1.77/+75% 1.12
| # Kryo 2.70/+55% 1.13
| # ThunderX2 1.17/+95% 1.36
| #
| # (*) estimate based on resources availability is less than 1.0,
| # i.e. measured result is worse than expected, presumably binary
| # translator is not almighty;
|
| $flavour=shift;
| $output=shift;
|
| if ($flavour && $flavour ne "void") {
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
| ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
| ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
| die "can't locate arm-xlate.pl";
|
| open STDOUT,"| \"$^X\" $xlate $flavour $output";
| } else {
| open STDOUT,">$output";
| }
|
| my ($ctx,$inp,$len,$padbit) = map("x$_",(0..3));
| my ($mac,$nonce)=($inp,$len);
|
| my ($h0,$h1,$h2,$r0,$r1,$s1,$t0,$t1,$d0,$d1,$d2) = map("x$_",(4..14));
|
| $code.=<<___;
| #ifndef __KERNEL__
| # include "arm_arch.h"
| .extern OPENSSL_armcap_P
| #endif
|
| .text
|
| // forward "declarations" are required for Apple
| .globl poly1305_blocks
| .globl poly1305_emit
|
| .globl poly1305_init
| .type poly1305_init,%function
| .align 5
| poly1305_init:
| cmp $inp,xzr
| stp xzr,xzr,[$ctx] // zero hash value
| stp xzr,xzr,[$ctx,#16] // [along with is_base2_26]
|
| csel x0,xzr,x0,eq
| b.eq .Lno_key
|
| #ifndef __KERNEL__
| adrp x17,OPENSSL_armcap_P
| ldr w17,[x17,#:lo12:OPENSSL_armcap_P]
| #endif
|
| ldp $r0,$r1,[$inp] // load key
| mov $s1,#0xfffffffc0fffffff
| movk $s1,#0x0fff,lsl#48
| #ifdef __AARCH64EB__
| rev $r0,$r0 // flip bytes
| rev $r1,$r1
| #endif
| and $r0,$r0,$s1 // &=0ffffffc0fffffff
| and $s1,$s1,#-4
| and $r1,$r1,$s1 // &=0ffffffc0ffffffc
| mov w#$s1,#-1
| stp $r0,$r1,[$ctx,#32] // save key value
| str w#$s1,[$ctx,#48] // impossible key power value
|
| #ifndef __KERNEL__
| tst w17,#ARMV7_NEON
|
| adr $d0,.Lpoly1305_blocks
| adr $r0,.Lpoly1305_blocks_neon
| adr $d1,.Lpoly1305_emit
|
| csel $d0,$d0,$r0,eq
|
| # ifdef __ILP32__
| stp w#$d0,w#$d1,[$len]
| # else
| stp $d0,$d1,[$len]
| # endif
| #endif
| mov x0,#1
| .Lno_key:
| ret
| .size poly1305_init,.-poly1305_init
|
| .type poly1305_blocks,%function
| .align 5
| poly1305_blocks:
| .Lpoly1305_blocks:
| ands $len,$len,#-16
| b.eq .Lno_data
|
| ldp $h0,$h1,[$ctx] // load hash value
| ldp $h2,x17,[$ctx,#16] // [along with is_base2_26]
| ldp $r0,$r1,[$ctx,#32] // load key value
|
| #ifdef __AARCH64EB__
| lsr $d0,$h0,#32
| mov w#$d1,w#$h0
| lsr $d2,$h1,#32
| mov w15,w#$h1
| lsr x16,$h2,#32
| #else
| mov w#$d0,w#$h0
| lsr $d1,$h0,#32
| mov w#$d2,w#$h1
| lsr x15,$h1,#32
| mov w16,w#$h2
| #endif
|
| add $d0,$d0,$d1,lsl#26 // base 2^26 -> base 2^64
| lsr $d1,$d2,#12
| adds $d0,$d0,$d2,lsl#52
| add $d1,$d1,x15,lsl#14
| adc $d1,$d1,xzr
| lsr $d2,x16,#24
| adds $d1,$d1,x16,lsl#40
| adc $d2,$d2,xzr
|
| cmp x17,#0 // is_base2_26?
| add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2)
| csel $h0,$h0,$d0,eq // choose between radixes
| csel $h1,$h1,$d1,eq
| csel $h2,$h2,$d2,eq
|
| .Loop:
| ldp $t0,$t1,[$inp],#16 // load input
| sub $len,$len,#16
| #ifdef __AARCH64EB__
| rev $t0,$t0
| rev $t1,$t1
| #endif
| adds $h0,$h0,$t0 // accumulate input
| adcs $h1,$h1,$t1
|
| mul $d0,$h0,$r0 // h0*r0
| adc $h2,$h2,$padbit
| umulh $d1,$h0,$r0
|
| mul $t0,$h1,$s1 // h1*5*r1
| umulh $t1,$h1,$s1
|
| adds $d0,$d0,$t0
| mul $t0,$h0,$r1 // h0*r1
| adc $d1,$d1,$t1
| umulh $d2,$h0,$r1
|
| adds $d1,$d1,$t0
| mul $t0,$h1,$r0 // h1*r0
| adc $d2,$d2,xzr
| umulh $t1,$h1,$r0
|
| adds $d1,$d1,$t0
| mul $t0,$h2,$s1 // h2*5*r1
| adc $d2,$d2,$t1
| mul $t1,$h2,$r0 // h2*r0
|
| adds $d1,$d1,$t0
| adc $d2,$d2,$t1
|
| and $t0,$d2,#-4 // final reduction
| and $h2,$d2,#3
| add $t0,$t0,$d2,lsr#2
| adds $h0,$d0,$t0
| adcs $h1,$d1,xzr
| adc $h2,$h2,xzr
|
| cbnz $len,.Loop
|
| stp $h0,$h1,[$ctx] // store hash value
| stp $h2,xzr,[$ctx,#16] // [and clear is_base2_26]
|
| .Lno_data:
| ret
| .size poly1305_blocks,.-poly1305_blocks
|
| .type poly1305_emit,%function
| .align 5
| poly1305_emit:
| .Lpoly1305_emit:
| ldp $h0,$h1,[$ctx] // load hash base 2^64
| ldp $h2,$r0,[$ctx,#16] // [along with is_base2_26]
| ldp $t0,$t1,[$nonce] // load nonce
|
| #ifdef __AARCH64EB__
| lsr $d0,$h0,#32
| mov w#$d1,w#$h0
| lsr $d2,$h1,#32
| mov w15,w#$h1
| lsr x16,$h2,#32
| #else
| mov w#$d0,w#$h0
| lsr $d1,$h0,#32
| mov w#$d2,w#$h1
| lsr x15,$h1,#32
| mov w16,w#$h2
| #endif
|
| add $d0,$d0,$d1,lsl#26 // base 2^26 -> base 2^64
| lsr $d1,$d2,#12
| adds $d0,$d0,$d2,lsl#52
| add $d1,$d1,x15,lsl#14
| adc $d1,$d1,xzr
| lsr $d2,x16,#24
| adds $d1,$d1,x16,lsl#40
| adc $d2,$d2,xzr
|
| cmp $r0,#0 // is_base2_26?
| csel $h0,$h0,$d0,eq // choose between radixes
| csel $h1,$h1,$d1,eq
| csel $h2,$h2,$d2,eq
|
| 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 __AARCH64EB__
| ror $t0,$t0,#32 // flip nonce words
| ror $t1,$t1,#32
| #endif
| adds $h0,$h0,$t0 // accumulate nonce
| adc $h1,$h1,$t1
| #ifdef __AARCH64EB__
| rev $h0,$h0 // flip output bytes
| rev $h1,$h1
| #endif
| stp $h0,$h1,[$mac] // write result
|
| ret
| .size poly1305_emit,.-poly1305_emit
| ___
| my ($R0,$R1,$S1,$R2,$S2,$R3,$S3,$R4,$S4) = map("v$_.4s",(0..8));
| my ($IN01_0,$IN01_1,$IN01_2,$IN01_3,$IN01_4) = map("v$_.2s",(9..13));
| my ($IN23_0,$IN23_1,$IN23_2,$IN23_3,$IN23_4) = map("v$_.2s",(14..18));
| my ($ACC0,$ACC1,$ACC2,$ACC3,$ACC4) = map("v$_.2d",(19..23));
| my ($H0,$H1,$H2,$H3,$H4) = map("v$_.2s",(24..28));
| my ($T0,$T1,$MASK) = map("v$_",(29..31));
|
| my ($in2,$zeros)=("x16","x17");
| my $is_base2_26 = $zeros; # borrow
|
| $code.=<<___;
| .type poly1305_mult,%function
| .align 5
| poly1305_mult:
| mul $d0,$h0,$r0 // h0*r0
| umulh $d1,$h0,$r0
|
| mul $t0,$h1,$s1 // h1*5*r1
| umulh $t1,$h1,$s1
|
| adds $d0,$d0,$t0
| mul $t0,$h0,$r1 // h0*r1
| adc $d1,$d1,$t1
| umulh $d2,$h0,$r1
|
| adds $d1,$d1,$t0
| mul $t0,$h1,$r0 // h1*r0
| adc $d2,$d2,xzr
| umulh $t1,$h1,$r0
|
| adds $d1,$d1,$t0
| mul $t0,$h2,$s1 // h2*5*r1
| adc $d2,$d2,$t1
| mul $t1,$h2,$r0 // h2*r0
|
| adds $d1,$d1,$t0
| adc $d2,$d2,$t1
|
| and $t0,$d2,#-4 // final reduction
| and $h2,$d2,#3
| add $t0,$t0,$d2,lsr#2
| adds $h0,$d0,$t0
| adcs $h1,$d1,xzr
| adc $h2,$h2,xzr
|
| ret
| .size poly1305_mult,.-poly1305_mult
|
| .type poly1305_splat,%function
| .align 4
| poly1305_splat:
| and x12,$h0,#0x03ffffff // base 2^64 -> base 2^26
| ubfx x13,$h0,#26,#26
| extr x14,$h1,$h0,#52
| and x14,x14,#0x03ffffff
| ubfx x15,$h1,#14,#26
| extr x16,$h2,$h1,#40
|
| str w12,[$ctx,#16*0] // r0
| add w12,w13,w13,lsl#2 // r1*5
| str w13,[$ctx,#16*1] // r1
| add w13,w14,w14,lsl#2 // r2*5
| str w12,[$ctx,#16*2] // s1
| str w14,[$ctx,#16*3] // r2
| add w14,w15,w15,lsl#2 // r3*5
| str w13,[$ctx,#16*4] // s2
| str w15,[$ctx,#16*5] // r3
| add w15,w16,w16,lsl#2 // r4*5
| str w14,[$ctx,#16*6] // s3
| str w16,[$ctx,#16*7] // r4
| str w15,[$ctx,#16*8] // s4
|
| ret
| .size poly1305_splat,.-poly1305_splat
|
| #ifdef __KERNEL__
| .globl poly1305_blocks_neon
| #endif
| .type poly1305_blocks_neon,%function
| .align 5
| poly1305_blocks_neon:
| .Lpoly1305_blocks_neon:
| ldr $is_base2_26,[$ctx,#24]
| cmp $len,#128
| b.lo .Lpoly1305_blocks
|
| .inst 0xd503233f // paciasp
| stp x29,x30,[sp,#-80]!
| add x29,sp,#0
|
| stp d8,d9,[sp,#16] // meet ABI requirements
| stp d10,d11,[sp,#32]
| stp d12,d13,[sp,#48]
| stp d14,d15,[sp,#64]
|
| cbz $is_base2_26,.Lbase2_64_neon
|
| ldp w10,w11,[$ctx] // load hash value base 2^26
| ldp w12,w13,[$ctx,#8]
| ldr w14,[$ctx,#16]
|
| tst $len,#31
| b.eq .Leven_neon
|
| ldp $r0,$r1,[$ctx,#32] // load key value
|
| 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 $d2,$h2,xzr // can be partially reduced...
|
| ldp $d0,$d1,[$inp],#16 // load input
| sub $len,$len,#16
| add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2)
|
| #ifdef __AARCH64EB__
| rev $d0,$d0
| rev $d1,$d1
| #endif
| adds $h0,$h0,$d0 // accumulate input
| adcs $h1,$h1,$d1
| adc $h2,$h2,$padbit
|
| bl poly1305_mult
|
| and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26
| ubfx x11,$h0,#26,#26
| extr x12,$h1,$h0,#52
| and x12,x12,#0x03ffffff
| ubfx x13,$h1,#14,#26
| extr x14,$h2,$h1,#40
|
| b .Leven_neon
|
| .align 4
| .Lbase2_64_neon:
| ldp $r0,$r1,[$ctx,#32] // load key value
|
| ldp $h0,$h1,[$ctx] // load hash value base 2^64
| ldr $h2,[$ctx,#16]
|
| tst $len,#31
| b.eq .Linit_neon
|
| ldp $d0,$d1,[$inp],#16 // load input
| sub $len,$len,#16
| add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2)
| #ifdef __AARCH64EB__
| rev $d0,$d0
| rev $d1,$d1
| #endif
| adds $h0,$h0,$d0 // accumulate input
| adcs $h1,$h1,$d1
| adc $h2,$h2,$padbit
|
| bl poly1305_mult
|
| .Linit_neon:
| ldr w17,[$ctx,#48] // first table element
| and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26
| ubfx x11,$h0,#26,#26
| extr x12,$h1,$h0,#52
| and x12,x12,#0x03ffffff
| ubfx x13,$h1,#14,#26
| extr x14,$h2,$h1,#40
|
| cmp w17,#-1 // is value impossible?
| b.ne .Leven_neon
|
| 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
| sub $ctx,$ctx,#48 // restore original $ctx
| b .Ldo_neon
|
| .align 4
| .Leven_neon:
| fmov ${H0},x10
| fmov ${H1},x11
| fmov ${H2},x12
| fmov ${H3},x13
| fmov ${H4},x14
|
| .Ldo_neon:
| ldp x8,x12,[$inp,#32] // inp[2:3]
| subs $len,$len,#64
| ldp x9,x13,[$inp,#48]
| add $in2,$inp,#96
| adr $zeros,.Lzeros
|
| lsl $padbit,$padbit,#24
| add x15,$ctx,#48
|
| #ifdef __AARCH64EB__
| 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 __AARCH64EB__
| 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
| movi $MASK.2d,#-1
| fmov $IN01_2,x8
| fmov $IN01_3,x10
| fmov $IN01_4,x12
| ushr $MASK.2d,$MASK.2d,#38
|
| 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 __AARCH64EB__
| 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 __AARCH64EB__
| 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
| fmov $IN01_4,x12
|
| /////////////////////////////////////////////////////////////////
| // lazy reduction as discussed in "NEON crypto" by D.J. Bernstein
| // and P. Schwabe
| //
| // [see discussion in poly1305-armv4 module]
|
| ushr $T0.2d,$ACC3,#26
| xtn $H3,$ACC3
| ushr $T1.2d,$ACC0,#26
| and $ACC0,$ACC0,$MASK.2d
| add $ACC4,$ACC4,$T0.2d // h3 -> h4
| bic $H3,#0xfc,lsl#24 // &=0x03ffffff
| add $ACC1,$ACC1,$T1.2d // h0 -> h1
|
| ushr $T0.2d,$ACC4,#26
| xtn $H4,$ACC4
| ushr $T1.2d,$ACC1,#26
| xtn $H1,$ACC1
| bic $H4,#0xfc,lsl#24
| add $ACC2,$ACC2,$T1.2d // h1 -> h2
|
| add $ACC0,$ACC0,$T0.2d
| shl $T0.2d,$T0.2d,#2
| shrn $T1.2s,$ACC2,#26
| xtn $H2,$ACC2
| add $ACC0,$ACC0,$T0.2d // h4 -> h0
| bic $H1,#0xfc,lsl#24
| add $H3,$H3,$T1.2s // h2 -> h3
| bic $H2,#0xfc,lsl#24
|
| shrn $T0.2s,$ACC0,#26
| xtn $H0,$ACC0
| ushr $T1.2s,$H3,#26
| bic $H3,#0xfc,lsl#24
| bic $H0,#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]
| add $IN01_2,$IN01_2,$H2
|
| ////////////////////////////////////////////////////////////////
| // 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:
| ////////////////////////////////////////////////////////////////
| // horizontal add
|
| addp $ACC3,$ACC3,$ACC3
| ldp d8,d9,[sp,#16] // meet ABI requirements
| addp $ACC0,$ACC0,$ACC0
| ldp d10,d11,[sp,#32]
| addp $ACC4,$ACC4,$ACC4
| ldp d12,d13,[sp,#48]
| addp $ACC1,$ACC1,$ACC1
| ldp d14,d15,[sp,#64]
| addp $ACC2,$ACC2,$ACC2
| ldr x30,[sp,#8]
|
| ////////////////////////////////////////////////////////////////
| // 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,$T1.2d // h3 -> h4
|
| ////////////////////////////////////////////////////////////////
| // write the result, can be partially reduced
|
| st4 {$ACC0,$ACC1,$ACC2,$ACC3}[0],[$ctx],#16
| mov x4,#1
| st1 {$ACC4}[0],[$ctx]
| str x4,[$ctx,#8] // set is_base2_26
|
| ldr x29,[sp],#80
| .inst 0xd50323bf // autiasp
| ret
| .size poly1305_blocks_neon,.-poly1305_blocks_neon
|
| .align 5
| .Lzeros:
| .long 0,0,0,0,0,0,0,0
| .asciz "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
| .align 2
| #if !defined(__KERNEL__) && !defined(_WIN64)
| .comm OPENSSL_armcap_P,4,4
| .hidden OPENSSL_armcap_P
| #endif
| ___
|
| foreach (split("\n",$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\[/;
| s/w#x([0-9]+)/w$1/g;
|
| print $_,"\n";
| }
| close STDOUT;
|
|
