arch/arm64/crypto/poly1305-armv8.pl - linux - Git at Google

 #!/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
 	adrp	$zeros,.Lzeros
 	add	$zeros,$zeros,#:lo12:.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

 .pushsection .rodata
 .align	5
 .Lzeros:
 .long	0,0,0,0,0,0,0,0
 .asciz	"Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
 .popsection

 .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;
	#!/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 // h15r1
	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 // h25r1
	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 // h15r1
	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 // h25r1
	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
	adrp $zeros,.Lzeros
	add $zeros,$zeros,#:lo12:.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 = h0r4 + h1r3 + h2r2 + h3r1 + h4*r0
	// d3 = h0r3 + h1r2 + h2r1 + h3r0 + h45r4
	// d2 = h0r2 + h1r1 + h2r0 + h35r4 + h45*r3
	// d1 = h0r1 + h1r0 + h25r4 + h35r3 + h45r2
	// d0 = h0r0 + h15r4 + h25r3 + h35r2 + h45*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

	.pushsection .rodata
	.align 5
	.Lzeros:
	.long 0,0,0,0,0,0,0,0
	.asciz "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
	.popsection

	.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]+)[^,],\sx([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;