Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/bn/asm/x86_64-mont.pl

Index: openssl/crypto/bn/asm/x86_64-mont.pl
diff --git a/openssl/crypto/bn/asm/x86_64-mont.pl b/openssl/crypto/bn/asm/x86_64-mont.pl
deleted file mode 100755
index 17fb94c84c9f1793268a26fa553cec8ad38d5579..0000000000000000000000000000000000000000
--- a/openssl/crypto/bn/asm/x86_64-mont.pl
+++ /dev/null
@@ -1,1681 +0,0 @@
-#!/usr/bin/env perl
-
-# ====================================================================
-# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
-# project. The module is, however, dual licensed under OpenSSL and
-# CRYPTOGAMS licenses depending on where you obtain it. For further
-# details see http://www.openssl.org/~appro/cryptogams/.
-# ====================================================================
-
-# October 2005.
-#
-# Montgomery multiplication routine for x86_64. While it gives modest
-# 9% improvement of rsa4096 sign on Opteron, rsa512 sign runs more
-# than twice, >2x, as fast. Most common rsa1024 sign is improved by
-# respectful 50%. It remains to be seen if loop unrolling and
-# dedicated squaring routine can provide further improvement...
-
-# July 2011.
-#
-# Add dedicated squaring procedure. Performance improvement varies
-# from platform to platform, but in average it's ~5%/15%/25%/33%
-# for 512-/1024-/2048-/4096-bit RSA *sign* benchmarks respectively.
-
-# August 2011.
-#
-# Unroll and modulo-schedule inner loops in such manner that they
-# are "fallen through" for input lengths of 8, which is critical for
-# 1024-bit RSA *sign*. Average performance improvement in comparison
-# to *initial* version of this module from 2005 is ~0%/30%/40%/45%
-# for 512-/1024-/2048-/4096-bit RSA *sign* benchmarks respectively.
-
-$flavour = shift;
-$output  = shift;
-if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
-
-$win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
-
-$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
-( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
-( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
-die "can't locate x86_64-xlate.pl";
-
-open OUT,"| \"$^X\" $xlate $flavour $output";
-*STDOUT=*OUT;
-
-# int bn_mul_mont(
-$rp="%rdi";	# BN_ULONG *rp,
-$ap="%rsi";	# const BN_ULONG *ap,
-$bp="%rdx";	# const BN_ULONG *bp,
-$np="%rcx";	# const BN_ULONG *np,
-$n0="%r8";	# const BN_ULONG *n0,
-$num="%r9";	# int num);
-$lo0="%r10";
-$hi0="%r11";
-$hi1="%r13";
-$i="%r14";
-$j="%r15";
-$m0="%rbx";
-$m1="%rbp";
-
-$code=<<___;
-.text
-
-.globl	bn_mul_mont
-.type	bn_mul_mont,\@function,6
-.align	16
-bn_mul_mont:
-	test	\$3,${num}d
-	jnz	.Lmul_enter
-	cmp	\$8,${num}d
-	jb	.Lmul_enter
-	cmp	$ap,$bp
-	jne	.Lmul4x_enter
-	jmp	.Lsqr4x_enter
-
-.align	16
-.Lmul_enter:
-	push	%rbx
-	push	%rbp
-	push	%r12
-	push	%r13
-	push	%r14
-	push	%r15
-
-	mov	${num}d,${num}d
-	lea	2($num),%r10
-	mov	%rsp,%r11
-	neg	%r10
-	lea	(%rsp,%r10,8),%rsp	# tp=alloca(8*(num+2))
-	and	\$-1024,%rsp		# minimize TLB usage
-
-	mov	%r11,8(%rsp,$num,8)	# tp[num+1]=%rsp
-.Lmul_body:
-	mov	$bp,%r12		# reassign $bp
-___
-		$bp="%r12";
-$code.=<<___;
-	mov	($n0),$n0		# pull n0[0] value
-	mov	($bp),$m0		# m0=bp[0]
-	mov	($ap),%rax
-
-	xor	$i,$i			# i=0
-	xor	$j,$j			# j=0
-
-	mov	$n0,$m1
-	mulq	$m0			# ap[0]*bp[0]
-	mov	%rax,$lo0
-	mov	($np),%rax
-
-	imulq	$lo0,$m1		# "tp[0]"*n0
-	mov	%rdx,$hi0
-
-	mulq	$m1			# np[0]*m1
-	add	%rax,$lo0		# discarded
-	mov	8($ap),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$hi1
-
-	lea	1($j),$j		# j++
-	jmp	.L1st_enter
-
-.align	16
-.L1st:
-	add	%rax,$hi1
-	mov	($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$hi0,$hi1		# np[j]*m1+ap[j]*bp[0]
-	mov	$lo0,$hi0
-	adc	\$0,%rdx
-	mov	$hi1,-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$hi1
-
-.L1st_enter:
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$hi0
-	mov	($np,$j,8),%rax
-	adc	\$0,%rdx
-	lea	1($j),$j		# j++
-	mov	%rdx,$lo0
-
-	mulq	$m1			# np[j]*m1
-	cmp	$num,$j
-	jne	.L1st
-
-	add	%rax,$hi1
-	mov	($ap),%rax		# ap[0]
-	adc	\$0,%rdx
-	add	$hi0,$hi1		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$hi1,-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$hi1
-	mov	$lo0,$hi0
-
-	xor	%rdx,%rdx
-	add	$hi0,$hi1
-	adc	\$0,%rdx
-	mov	$hi1,-8(%rsp,$num,8)
-	mov	%rdx,(%rsp,$num,8)	# store upmost overflow bit
-
-	lea	1($i),$i		# i++
-	jmp	.Louter
-.align	16
-.Louter:
-	mov	($bp,$i,8),$m0		# m0=bp[i]
-	xor	$j,$j			# j=0
-	mov	$n0,$m1
-	mov	(%rsp),$lo0
-	mulq	$m0			# ap[0]*bp[i]
-	add	%rax,$lo0		# ap[0]*bp[i]+tp[0]
-	mov	($np),%rax
-	adc	\$0,%rdx
-
-	imulq	$lo0,$m1		# tp[0]*n0
-	mov	%rdx,$hi0
-
-	mulq	$m1			# np[0]*m1
-	add	%rax,$lo0		# discarded
-	mov	8($ap),%rax
-	adc	\$0,%rdx
-	mov	8(%rsp),$lo0		# tp[1]
-	mov	%rdx,$hi1
-
-	lea	1($j),$j		# j++
-	jmp	.Linner_enter
-
-.align	16
-.Linner:
-	add	%rax,$hi1
-	mov	($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$lo0,$hi1		# np[j]*m1+ap[j]*bp[i]+tp[j]
-	mov	(%rsp,$j,8),$lo0
-	adc	\$0,%rdx
-	mov	$hi1,-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$hi1
-
-.Linner_enter:
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$hi0
-	mov	($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	$hi0,$lo0		# ap[j]*bp[i]+tp[j]
-	mov	%rdx,$hi0
-	adc	\$0,$hi0
-	lea	1($j),$j		# j++
-
-	mulq	$m1			# np[j]*m1
-	cmp	$num,$j
-	jne	.Linner
-
-	add	%rax,$hi1
-	mov	($ap),%rax		# ap[0]
-	adc	\$0,%rdx
-	add	$lo0,$hi1		# np[j]*m1+ap[j]*bp[i]+tp[j]
-	mov	(%rsp,$j,8),$lo0
-	adc	\$0,%rdx
-	mov	$hi1,-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$hi1
-
-	xor	%rdx,%rdx
-	add	$hi0,$hi1
-	adc	\$0,%rdx
-	add	$lo0,$hi1		# pull upmost overflow bit
-	adc	\$0,%rdx
-	mov	$hi1,-8(%rsp,$num,8)
-	mov	%rdx,(%rsp,$num,8)	# store upmost overflow bit
-
-	lea	1($i),$i		# i++
-	cmp	$num,$i
-	jl	.Louter
-
-	xor	$i,$i			# i=0 and clear CF!
-	mov	(%rsp),%rax		# tp[0]
-	lea	(%rsp),$ap		# borrow ap for tp
-	mov	$num,$j			# j=num
-	jmp	.Lsub
-.align	16
-.Lsub:	sbb	($np,$i,8),%rax
-	mov	%rax,($rp,$i,8)		# rp[i]=tp[i]-np[i]
-	mov	8($ap,$i,8),%rax	# tp[i+1]
-	lea	1($i),$i		# i++
-	dec	$j			# doesnn't affect CF!
-	jnz	.Lsub
-
-	sbb	\$0,%rax		# handle upmost overflow bit
-	xor	$i,$i
-	and	%rax,$ap
-	not	%rax
-	mov	$rp,$np
-	and	%rax,$np
-	mov	$num,$j			# j=num
-	or	$np,$ap			# ap=borrow?tp:rp
-.align	16
-.Lcopy:					# copy or in-place refresh
-	mov	($ap,$i,8),%rax
-	mov	$i,(%rsp,$i,8)		# zap temporary vector
-	mov	%rax,($rp,$i,8)		# rp[i]=tp[i]
-	lea	1($i),$i
-	sub	\$1,$j
-	jnz	.Lcopy
-
-	mov	8(%rsp,$num,8),%rsi	# restore %rsp
-	mov	\$1,%rax
-	mov	(%rsi),%r15
-	mov	8(%rsi),%r14
-	mov	16(%rsi),%r13
-	mov	24(%rsi),%r12
-	mov	32(%rsi),%rbp
-	mov	40(%rsi),%rbx
-	lea	48(%rsi),%rsp
-.Lmul_epilogue:
-	ret
-.size	bn_mul_mont,.-bn_mul_mont
-___
-{{{
-my @A=("%r10","%r11");
-my @N=("%r13","%rdi");
-$code.=<<___;
-.type	bn_mul4x_mont,\@function,6
-.align	16
-bn_mul4x_mont:
-.Lmul4x_enter:
-	push	%rbx
-	push	%rbp
-	push	%r12
-	push	%r13
-	push	%r14
-	push	%r15
-
-	mov	${num}d,${num}d
-	lea	4($num),%r10
-	mov	%rsp,%r11
-	neg	%r10
-	lea	(%rsp,%r10,8),%rsp	# tp=alloca(8*(num+4))
-	and	\$-1024,%rsp		# minimize TLB usage
-
-	mov	%r11,8(%rsp,$num,8)	# tp[num+1]=%rsp
-.Lmul4x_body:
-	mov	$rp,16(%rsp,$num,8)	# tp[num+2]=$rp
-	mov	%rdx,%r12		# reassign $bp
-___
-		$bp="%r12";
-$code.=<<___;
-	mov	($n0),$n0		# pull n0[0] value
-	mov	($bp),$m0		# m0=bp[0]
-	mov	($ap),%rax
-
-	xor	$i,$i			# i=0
-	xor	$j,$j			# j=0
-
-	mov	$n0,$m1
-	mulq	$m0			# ap[0]*bp[0]
-	mov	%rax,$A[0]
-	mov	($np),%rax
-
-	imulq	$A[0],$m1		# "tp[0]"*n0
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[0]*m1
-	add	%rax,$A[0]		# discarded
-	mov	8($ap),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$N[1]
-
-	mulq	$m0
-	add	%rax,$A[1]
-	mov	8($np),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[0]
-
-	mulq	$m1
-	add	%rax,$N[1]
-	mov	16($ap),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]
-	lea	4($j),$j		# j++
-	adc	\$0,%rdx
-	mov	$N[1],(%rsp)
-	mov	%rdx,$N[0]
-	jmp	.L1st4x
-.align	16
-.L1st4x:
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[0]
-	mov	-16($np,$j,8),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	-8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[0],-24(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[1]
-	mov	-8($np,$j,8),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[1],-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[0]
-	mov	($np,$j,8),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[0],-8(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[1]
-	mov	8($np,$j,8),%rax
-	adc	\$0,%rdx
-	lea	4($j),$j		# j++
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	-16($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[1],-32(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-	cmp	$num,$j
-	jl	.L1st4x
-
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[0]
-	mov	-16($np,$j,8),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	-8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[0],-24(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[0]
-	add	%rax,$A[1]
-	mov	-8($np,$j,8),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	($ap),%rax		# ap[0]
-	adc	\$0,%rdx
-	add	$A[1],$N[1]		# np[j]*m1+ap[j]*bp[0]
-	adc	\$0,%rdx
-	mov	$N[1],-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-
-	xor	$N[1],$N[1]
-	add	$A[0],$N[0]
-	adc	\$0,$N[1]
-	mov	$N[0],-8(%rsp,$j,8)
-	mov	$N[1],(%rsp,$j,8)	# store upmost overflow bit
-
-	lea	1($i),$i		# i++
-.align	4
-.Louter4x:
-	mov	($bp,$i,8),$m0		# m0=bp[i]
-	xor	$j,$j			# j=0
-	mov	(%rsp),$A[0]
-	mov	$n0,$m1
-	mulq	$m0			# ap[0]*bp[i]
-	add	%rax,$A[0]		# ap[0]*bp[i]+tp[0]
-	mov	($np),%rax
-	adc	\$0,%rdx
-
-	imulq	$A[0],$m1		# tp[0]*n0
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[0]*m1
-	add	%rax,$A[0]		# "$N[0]", discarded
-	mov	8($ap),%rax
-	adc	\$0,%rdx
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[1]
-	mov	8($np),%rax
-	adc	\$0,%rdx
-	add	8(%rsp),$A[1]		# +tp[1]
-	adc	\$0,%rdx
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	16($ap),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]		# np[j]*m1+ap[j]*bp[i]+tp[j]
-	lea	4($j),$j		# j+=2
-	adc	\$0,%rdx
-	mov	$N[1],(%rsp)		# tp[j-1]
-	mov	%rdx,$N[0]
-	jmp	.Linner4x
-.align	16
-.Linner4x:
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[0]
-	mov	-16($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	-16(%rsp,$j,8),$A[0]	# ap[j]*bp[i]+tp[j]
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	-8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]
-	adc	\$0,%rdx
-	mov	$N[0],-24(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[1]
-	mov	-8($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	-8(%rsp,$j,8),$A[1]
-	adc	\$0,%rdx
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]
-	adc	\$0,%rdx
-	mov	$N[1],-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[0]
-	mov	($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	(%rsp,$j,8),$A[0]	# ap[j]*bp[i]+tp[j]
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]
-	adc	\$0,%rdx
-	mov	$N[0],-8(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[1]
-	mov	8($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	8(%rsp,$j,8),$A[1]
-	adc	\$0,%rdx
-	lea	4($j),$j		# j++
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	-16($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[1],$N[1]
-	adc	\$0,%rdx
-	mov	$N[1],-32(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-	cmp	$num,$j
-	jl	.Linner4x
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[0]
-	mov	-16($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	-16(%rsp,$j,8),$A[0]	# ap[j]*bp[i]+tp[j]
-	adc	\$0,%rdx
-	mov	%rdx,$A[1]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[0]
-	mov	-8($ap,$j,8),%rax
-	adc	\$0,%rdx
-	add	$A[0],$N[0]
-	adc	\$0,%rdx
-	mov	$N[0],-24(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[1]
-
-	mulq	$m0			# ap[j]*bp[i]
-	add	%rax,$A[1]
-	mov	-8($np,$j,8),%rax
-	adc	\$0,%rdx
-	add	-8(%rsp,$j,8),$A[1]
-	adc	\$0,%rdx
-	lea	1($i),$i		# i++
-	mov	%rdx,$A[0]
-
-	mulq	$m1			# np[j]*m1
-	add	%rax,$N[1]
-	mov	($ap),%rax		# ap[0]
-	adc	\$0,%rdx
-	add	$A[1],$N[1]
-	adc	\$0,%rdx
-	mov	$N[1],-16(%rsp,$j,8)	# tp[j-1]
-	mov	%rdx,$N[0]
-
-	xor	$N[1],$N[1]
-	add	$A[0],$N[0]
-	adc	\$0,$N[1]
-	add	(%rsp,$num,8),$N[0]	# pull upmost overflow bit
-	adc	\$0,$N[1]
-	mov	$N[0],-8(%rsp,$j,8)
-	mov	$N[1],(%rsp,$j,8)	# store upmost overflow bit
-
-	cmp	$num,$i
-	jl	.Louter4x
-___
-{
-my @ri=("%rax","%rdx",$m0,$m1);
-$code.=<<___;
-	mov	16(%rsp,$num,8),$rp	# restore $rp
-	mov	0(%rsp),@ri[0]		# tp[0]
-	pxor	%xmm0,%xmm0
-	mov	8(%rsp),@ri[1]		# tp[1]
-	shr	\$2,$num		# num/=4
-	lea	(%rsp),$ap		# borrow ap for tp
-	xor	$i,$i			# i=0 and clear CF!
-
-	sub	0($np),@ri[0]
-	mov	16($ap),@ri[2]		# tp[2]
-	mov	24($ap),@ri[3]		# tp[3]
-	sbb	8($np),@ri[1]
-	lea	-1($num),$j		# j=num/4-1
-	jmp	.Lsub4x
-.align	16
-.Lsub4x:
-	mov	@ri[0],0($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	@ri[1],8($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	16($np,$i,8),@ri[2]
-	mov	32($ap,$i,8),@ri[0]	# tp[i+1]
-	mov	40($ap,$i,8),@ri[1]
-	sbb	24($np,$i,8),@ri[3]
-	mov	@ri[2],16($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	@ri[3],24($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	32($np,$i,8),@ri[0]
-	mov	48($ap,$i,8),@ri[2]
-	mov	56($ap,$i,8),@ri[3]
-	sbb	40($np,$i,8),@ri[1]
-	lea	4($i),$i		# i++
-	dec	$j			# doesnn't affect CF!
-	jnz	.Lsub4x
-
-	mov	@ri[0],0($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	32($ap,$i,8),@ri[0]	# load overflow bit
-	sbb	16($np,$i,8),@ri[2]
-	mov	@ri[1],8($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	24($np,$i,8),@ri[3]
-	mov	@ri[2],16($rp,$i,8)	# rp[i]=tp[i]-np[i]
-
-	sbb	\$0,@ri[0]		# handle upmost overflow bit
-	mov	@ri[3],24($rp,$i,8)	# rp[i]=tp[i]-np[i]
-	xor	$i,$i			# i=0
-	and	@ri[0],$ap
-	not	@ri[0]
-	mov	$rp,$np
-	and	@ri[0],$np
-	lea	-1($num),$j
-	or	$np,$ap			# ap=borrow?tp:rp
-
-	movdqu	($ap),%xmm1
-	movdqa	%xmm0,(%rsp)
-	movdqu	%xmm1,($rp)
-	jmp	.Lcopy4x
-.align	16
-.Lcopy4x:					# copy or in-place refresh
-	movdqu	16($ap,$i),%xmm2
-	movdqu	32($ap,$i),%xmm1
-	movdqa	%xmm0,16(%rsp,$i)
-	movdqu	%xmm2,16($rp,$i)
-	movdqa	%xmm0,32(%rsp,$i)
-	movdqu	%xmm1,32($rp,$i)
-	lea	32($i),$i
-	dec	$j
-	jnz	.Lcopy4x
-
-	shl	\$2,$num
-	movdqu	16($ap,$i),%xmm2
-	movdqa	%xmm0,16(%rsp,$i)
-	movdqu	%xmm2,16($rp,$i)
-___
-}
-$code.=<<___;
-	mov	8(%rsp,$num,8),%rsi	# restore %rsp
-	mov	\$1,%rax
-	mov	(%rsi),%r15
-	mov	8(%rsi),%r14
-	mov	16(%rsi),%r13
-	mov	24(%rsi),%r12
-	mov	32(%rsi),%rbp
-	mov	40(%rsi),%rbx
-	lea	48(%rsi),%rsp
-.Lmul4x_epilogue:
-	ret
-.size	bn_mul4x_mont,.-bn_mul4x_mont
-___
-}}}
-{{{
-######################################################################
-# void bn_sqr4x_mont(
-my $rptr="%rdi";	# const BN_ULONG *rptr,
-my $aptr="%rsi";	# const BN_ULONG *aptr,
-my $bptr="%rdx";	# not used
-my $nptr="%rcx";	# const BN_ULONG *nptr,
-my $n0  ="%r8";		# const BN_ULONG *n0);
-my $num ="%r9";		# int num, has to be divisible by 4 and
-			# not less than 8
-
-my ($i,$j,$tptr)=("%rbp","%rcx",$rptr);
-my @A0=("%r10","%r11");
-my @A1=("%r12","%r13");
-my ($a0,$a1,$ai)=("%r14","%r15","%rbx");
-
-$code.=<<___;
-.type	bn_sqr4x_mont,\@function,6
-.align	16
-bn_sqr4x_mont:
-.Lsqr4x_enter:
-	push	%rbx
-	push	%rbp
-	push	%r12
-	push	%r13
-	push	%r14
-	push	%r15
-
-	shl	\$3,${num}d		# convert $num to bytes
-	xor	%r10,%r10
-	mov	%rsp,%r11		# put aside %rsp
-	sub	$num,%r10		# -$num
-	mov	($n0),$n0		# *n0
-	lea	-72(%rsp,%r10,2),%rsp	# alloca(frame+2*$num)
-	and	\$-1024,%rsp		# minimize TLB usage
-	##############################################################
-	# Stack layout
-	#
-	# +0	saved $num, used in reduction section
-	# +8	&t[2*$num], used in reduction section
-	# +32	saved $rptr
-	# +40	saved $nptr
-	# +48	saved *n0
-	# +56	saved %rsp
-	# +64	t[2*$num]
-	#
-	mov	$rptr,32(%rsp)		# save $rptr
-	mov	$nptr,40(%rsp)
-	mov	$n0,  48(%rsp)
-	mov	%r11, 56(%rsp)		# save original %rsp
-.Lsqr4x_body:
-	##############################################################
-	# Squaring part:
-	#
-	# a) multiply-n-add everything but a[i]*a[i];
-	# b) shift result of a) by 1 to the left and accumulate
-	#    a[i]*a[i] products;
-	#
-	lea	32(%r10),$i		# $i=-($num-32)
-	lea	($aptr,$num),$aptr	# end of a[] buffer, ($aptr,$i)=&ap[2]
-
-	mov	$num,$j			# $j=$num
-
-					# comments apply to $num==8 case
-	mov	-32($aptr,$i),$a0	# a[0]
-	lea	64(%rsp,$num,2),$tptr	# end of tp[] buffer, &tp[2*$num]
-	mov	-24($aptr,$i),%rax	# a[1]
-	lea	-32($tptr,$i),$tptr	# end of tp[] window, &tp[2*$num-"$i"]
-	mov	-16($aptr,$i),$ai	# a[2]
-	mov	%rax,$a1
-
-	mul	$a0			# a[1]*a[0]
-	mov	%rax,$A0[0]		# a[1]*a[0]
-	 mov	$ai,%rax		# a[2]
-	mov	%rdx,$A0[1]
-	mov	$A0[0],-24($tptr,$i)	# t[1]
-
-	xor	$A0[0],$A0[0]
-	mul	$a0			# a[2]*a[0]
-	add	%rax,$A0[1]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[0]
-	mov	$A0[1],-16($tptr,$i)	# t[2]
-
-	lea	-16($i),$j		# j=-16
-
-
-	 mov	8($aptr,$j),$ai		# a[3]
-	mul	$a1			# a[2]*a[1]
-	mov	%rax,$A1[0]		# a[2]*a[1]+t[3]
-	 mov	$ai,%rax
-	mov	%rdx,$A1[1]
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	 lea	16($j),$j
-	adc	\$0,$A0[1]
-	mul	$a0			# a[3]*a[0]
-	add	%rax,$A0[0]		# a[3]*a[0]+a[2]*a[1]+t[3]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-8($tptr,$j)	# t[3]
-	jmp	.Lsqr4x_1st
-
-.align	16
-.Lsqr4x_1st:
-	 mov	($aptr,$j),$ai		# a[4]
-	xor	$A1[0],$A1[0]
-	mul	$a1			# a[3]*a[1]
-	add	%rax,$A1[1]		# a[3]*a[1]+t[4]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[0]
-
-	xor	$A0[0],$A0[0]
-	add	$A1[1],$A0[1]
-	adc	\$0,$A0[0]
-	mul	$a0			# a[4]*a[0]
-	add	%rax,$A0[1]		# a[4]*a[0]+a[3]*a[1]+t[4]
-	 mov	$ai,%rax		# a[3]
-	adc	%rdx,$A0[0]
-	mov	$A0[1],($tptr,$j)	# t[4]
-
-
-	 mov	8($aptr,$j),$ai		# a[5]
-	xor	$A1[1],$A1[1]
-	mul	$a1			# a[4]*a[3]
-	add	%rax,$A1[0]		# a[4]*a[3]+t[5]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[1]
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	adc	\$0,$A0[1]
-	mul	$a0			# a[5]*a[2]
-	add	%rax,$A0[0]		# a[5]*a[2]+a[4]*a[3]+t[5]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],8($tptr,$j)	# t[5]
-
-	 mov	16($aptr,$j),$ai	# a[6]
-	xor	$A1[0],$A1[0]
-	mul	$a1			# a[5]*a[3]
-	add	%rax,$A1[1]		# a[5]*a[3]+t[6]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[0]
-
-	xor	$A0[0],$A0[0]
-	add	$A1[1],$A0[1]
-	adc	\$0,$A0[0]
-	mul	$a0			# a[6]*a[2]
-	add	%rax,$A0[1]		# a[6]*a[2]+a[5]*a[3]+t[6]
-	 mov	$ai,%rax		# a[3]
-	adc	%rdx,$A0[0]
-	mov	$A0[1],16($tptr,$j)	# t[6]
-
-
-	 mov	24($aptr,$j),$ai	# a[7]
-	xor	$A1[1],$A1[1]
-	mul	$a1			# a[6]*a[5]
-	add	%rax,$A1[0]		# a[6]*a[5]+t[7]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[1]
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	 lea	32($j),$j
-	adc	\$0,$A0[1]
-	mul	$a0			# a[7]*a[4]
-	add	%rax,$A0[0]		# a[7]*a[4]+a[6]*a[5]+t[6]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-8($tptr,$j)	# t[7]
-
-	cmp	\$0,$j
-	jne	.Lsqr4x_1st
-
-	xor	$A1[0],$A1[0]
-	add	$A0[1],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$a1			# a[7]*a[5]
-	add	%rax,$A1[1]
-	adc	%rdx,$A1[0]
-
-	mov	$A1[1],($tptr)		# t[8]
-	lea	16($i),$i
-	mov	$A1[0],8($tptr)		# t[9]
-	jmp	.Lsqr4x_outer
-
-.align	16
-.Lsqr4x_outer:				# comments apply to $num==6 case
-	mov	-32($aptr,$i),$a0	# a[0]
-	lea	64(%rsp,$num,2),$tptr	# end of tp[] buffer, &tp[2*$num]
-	mov	-24($aptr,$i),%rax	# a[1]
-	lea	-32($tptr,$i),$tptr	# end of tp[] window, &tp[2*$num-"$i"]
-	mov	-16($aptr,$i),$ai	# a[2]
-	mov	%rax,$a1
-
-	mov	-24($tptr,$i),$A0[0]	# t[1]
-	xor	$A0[1],$A0[1]
-	mul	$a0			# a[1]*a[0]
-	add	%rax,$A0[0]		# a[1]*a[0]+t[1]
-	 mov	$ai,%rax		# a[2]
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-24($tptr,$i)	# t[1]
-
-	xor	$A0[0],$A0[0]
-	add	-16($tptr,$i),$A0[1]	# a[2]*a[0]+t[2]
-	adc	\$0,$A0[0]
-	mul	$a0			# a[2]*a[0]
-	add	%rax,$A0[1]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[0]
-	mov	$A0[1],-16($tptr,$i)	# t[2]
-
-	lea	-16($i),$j		# j=-16
-	xor	$A1[0],$A1[0]
-
-
-	 mov	8($aptr,$j),$ai		# a[3]
-	xor	$A1[1],$A1[1]
-	add	8($tptr,$j),$A1[0]
-	adc	\$0,$A1[1]
-	mul	$a1			# a[2]*a[1]
-	add	%rax,$A1[0]		# a[2]*a[1]+t[3]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[1]
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	adc	\$0,$A0[1]
-	mul	$a0			# a[3]*a[0]
-	add	%rax,$A0[0]		# a[3]*a[0]+a[2]*a[1]+t[3]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],8($tptr,$j)	# t[3]
-
-	lea	16($j),$j
-	jmp	.Lsqr4x_inner
-
-.align	16
-.Lsqr4x_inner:
-	 mov	($aptr,$j),$ai		# a[4]
-	xor	$A1[0],$A1[0]
-	add	($tptr,$j),$A1[1]
-	adc	\$0,$A1[0]
-	mul	$a1			# a[3]*a[1]
-	add	%rax,$A1[1]		# a[3]*a[1]+t[4]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[0]
-
-	xor	$A0[0],$A0[0]
-	add	$A1[1],$A0[1]
-	adc	\$0,$A0[0]
-	mul	$a0			# a[4]*a[0]
-	add	%rax,$A0[1]		# a[4]*a[0]+a[3]*a[1]+t[4]
-	 mov	$ai,%rax		# a[3]
-	adc	%rdx,$A0[0]
-	mov	$A0[1],($tptr,$j)	# t[4]
-
-	 mov	8($aptr,$j),$ai		# a[5]
-	xor	$A1[1],$A1[1]
-	add	8($tptr,$j),$A1[0]
-	adc	\$0,$A1[1]
-	mul	$a1			# a[4]*a[3]
-	add	%rax,$A1[0]		# a[4]*a[3]+t[5]
-	 mov	$ai,%rax
-	adc	%rdx,$A1[1]
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	lea	16($j),$j		# j++
-	adc	\$0,$A0[1]
-	mul	$a0			# a[5]*a[2]
-	add	%rax,$A0[0]		# a[5]*a[2]+a[4]*a[3]+t[5]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-8($tptr,$j)	# t[5], "preloaded t[1]" below
-
-	cmp	\$0,$j
-	jne	.Lsqr4x_inner
-
-	xor	$A1[0],$A1[0]
-	add	$A0[1],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$a1			# a[5]*a[3]
-	add	%rax,$A1[1]
-	adc	%rdx,$A1[0]
-
-	mov	$A1[1],($tptr)		# t[6], "preloaded t[2]" below
-	mov	$A1[0],8($tptr)		# t[7], "preloaded t[3]" below
-
-	add	\$16,$i
-	jnz	.Lsqr4x_outer
-
-					# comments apply to $num==4 case
-	mov	-32($aptr),$a0		# a[0]
-	lea	64(%rsp,$num,2),$tptr	# end of tp[] buffer, &tp[2*$num]
-	mov	-24($aptr),%rax		# a[1]
-	lea	-32($tptr,$i),$tptr	# end of tp[] window, &tp[2*$num-"$i"]
-	mov	-16($aptr),$ai		# a[2]
-	mov	%rax,$a1
-
-	xor	$A0[1],$A0[1]
-	mul	$a0			# a[1]*a[0]
-	add	%rax,$A0[0]		# a[1]*a[0]+t[1], preloaded t[1]
-	 mov	$ai,%rax		# a[2]
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-24($tptr)	# t[1]
-
-	xor	$A0[0],$A0[0]
-	add	$A1[1],$A0[1]		# a[2]*a[0]+t[2], preloaded t[2]
-	adc	\$0,$A0[0]
-	mul	$a0			# a[2]*a[0]
-	add	%rax,$A0[1]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[0]
-	mov	$A0[1],-16($tptr)	# t[2]
-
-	 mov	-8($aptr),$ai		# a[3]
-	mul	$a1			# a[2]*a[1]
-	add	%rax,$A1[0]		# a[2]*a[1]+t[3], preloaded t[3]
-	 mov	$ai,%rax
-	adc	\$0,%rdx
-
-	xor	$A0[1],$A0[1]
-	add	$A1[0],$A0[0]
-	 mov	%rdx,$A1[1]
-	adc	\$0,$A0[1]
-	mul	$a0			# a[3]*a[0]
-	add	%rax,$A0[0]		# a[3]*a[0]+a[2]*a[1]+t[3]
-	 mov	$ai,%rax
-	adc	%rdx,$A0[1]
-	mov	$A0[0],-8($tptr)	# t[3]
-
-	xor	$A1[0],$A1[0]
-	add	$A0[1],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$a1			# a[3]*a[1]
-	add	%rax,$A1[1]
-	 mov	-16($aptr),%rax		# a[2]
-	adc	%rdx,$A1[0]
-
-	mov	$A1[1],($tptr)		# t[4]
-	mov	$A1[0],8($tptr)		# t[5]
-
-	mul	$ai			# a[2]*a[3]
-___
-{
-my ($shift,$carry)=($a0,$a1);
-my @S=(@A1,$ai,$n0);
-$code.=<<___;
-	 add	\$16,$i
-	 xor	$shift,$shift
-	 sub	$num,$i			# $i=16-$num
-	 xor	$carry,$carry
-
-	add	$A1[0],%rax		# t[5]
-	adc	\$0,%rdx
-	mov	%rax,8($tptr)		# t[5]
-	mov	%rdx,16($tptr)		# t[6]
-	mov	$carry,24($tptr)	# t[7]
-
-	 mov	-16($aptr,$i),%rax	# a[0]
-	lea	64(%rsp,$num,2),$tptr
-	 xor	$A0[0],$A0[0]		# t[0]
-	 mov	-24($tptr,$i,2),$A0[1]	# t[1]
-
-	lea	($shift,$A0[0],2),$S[0]	# t[2*i]<<1 | shift
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[1]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[1]		# | t[2*i]>>63
-	 mov	-16($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	-8($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[0]
-	 mov	-8($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[0],-32($tptr,$i,2)
-	adc	%rdx,$S[1]
-
-	lea	($shift,$A0[0],2),$S[2]	# t[2*i]<<1 | shift
-	 mov	$S[1],-24($tptr,$i,2)
-	 sbb	$carry,$carry		# mov cf,$carry
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[3]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[3]		# | t[2*i]>>63
-	 mov	0($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	8($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[2]
-	 mov	0($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[2],-16($tptr,$i,2)
-	adc	%rdx,$S[3]
-	lea	16($i),$i
-	mov	$S[3],-40($tptr,$i,2)
-	sbb	$carry,$carry		# mov cf,$carry
-	jmp	.Lsqr4x_shift_n_add
-
-.align	16
-.Lsqr4x_shift_n_add:
-	lea	($shift,$A0[0],2),$S[0]	# t[2*i]<<1 | shift
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[1]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[1]		# | t[2*i]>>63
-	 mov	-16($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	-8($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[0]
-	 mov	-8($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[0],-32($tptr,$i,2)
-	adc	%rdx,$S[1]
-
-	lea	($shift,$A0[0],2),$S[2]	# t[2*i]<<1 | shift
-	 mov	$S[1],-24($tptr,$i,2)
-	 sbb	$carry,$carry		# mov cf,$carry
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[3]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[3]		# | t[2*i]>>63
-	 mov	0($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	8($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[2]
-	 mov	0($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[2],-16($tptr,$i,2)
-	adc	%rdx,$S[3]
-
-	lea	($shift,$A0[0],2),$S[0]	# t[2*i]<<1 | shift
-	 mov	$S[3],-8($tptr,$i,2)
-	 sbb	$carry,$carry		# mov cf,$carry
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[1]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[1]		# | t[2*i]>>63
-	 mov	16($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	24($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[0]
-	 mov	8($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[0],0($tptr,$i,2)
-	adc	%rdx,$S[1]
-
-	lea	($shift,$A0[0],2),$S[2]	# t[2*i]<<1 | shift
-	 mov	$S[1],8($tptr,$i,2)
-	 sbb	$carry,$carry		# mov cf,$carry
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[3]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[3]		# | t[2*i]>>63
-	 mov	32($tptr,$i,2),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	40($tptr,$i,2),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[2]
-	 mov	16($aptr,$i),%rax	# a[i+1]	# prefetch
-	mov	$S[2],16($tptr,$i,2)
-	adc	%rdx,$S[3]
-	mov	$S[3],24($tptr,$i,2)
-	sbb	$carry,$carry		# mov cf,$carry
-	add	\$32,$i
-	jnz	.Lsqr4x_shift_n_add
-
-	lea	($shift,$A0[0],2),$S[0]	# t[2*i]<<1 | shift
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[1]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[1]		# | t[2*i]>>63
-	 mov	-16($tptr),$A0[0]	# t[2*i+2]	# prefetch
-	mov	$A0[1],$shift		# shift=t[2*i+1]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	 mov	-8($tptr),$A0[1]	# t[2*i+2+1]	# prefetch
-	adc	%rax,$S[0]
-	 mov	-8($aptr),%rax		# a[i+1]	# prefetch
-	mov	$S[0],-32($tptr)
-	adc	%rdx,$S[1]
-
-	lea	($shift,$A0[0],2),$S[2]	# t[2*i]<<1|shift
-	 mov	$S[1],-24($tptr)
-	 sbb	$carry,$carry		# mov cf,$carry
-	shr	\$63,$A0[0]
-	lea	($j,$A0[1],2),$S[3]	# t[2*i+1]<<1 |
-	shr	\$63,$A0[1]
-	or	$A0[0],$S[3]		# | t[2*i]>>63
-	mul	%rax			# a[i]*a[i]
-	neg	$carry			# mov $carry,cf
-	adc	%rax,$S[2]
-	adc	%rdx,$S[3]
-	mov	$S[2],-16($tptr)
-	mov	$S[3],-8($tptr)
-___
-}
-##############################################################
-# Montgomery reduction part, "word-by-word" algorithm.
-#
-{
-my ($topbit,$nptr)=("%rbp",$aptr);
-my ($m0,$m1)=($a0,$a1);
-my @Ni=("%rbx","%r9");
-$code.=<<___;
-	mov	40(%rsp),$nptr		# restore $nptr
-	mov	48(%rsp),$n0		# restore *n0
-	xor	$j,$j
-	mov	$num,0(%rsp)		# save $num
-	sub	$num,$j			# $j=-$num
-	 mov	64(%rsp),$A0[0]		# t[0]		# modsched #
-	 mov	$n0,$m0			#		# modsched #
-	lea	64(%rsp,$num,2),%rax	# end of t[] buffer
-	lea	64(%rsp,$num),$tptr	# end of t[] window
-	mov	%rax,8(%rsp)		# save end of t[] buffer
-	lea	($nptr,$num),$nptr	# end of n[] buffer
-	xor	$topbit,$topbit		# $topbit=0
-
-	mov	0($nptr,$j),%rax	# n[0]		# modsched #
-	mov	8($nptr,$j),$Ni[1]	# n[1]		# modsched #
-	 imulq	$A0[0],$m0		# m0=t[0]*n0	# modsched #
-	 mov	%rax,$Ni[0]		#		# modsched #
-	jmp	.Lsqr4x_mont_outer
-
-.align	16
-.Lsqr4x_mont_outer:
-	xor	$A0[1],$A0[1]
-	mul	$m0			# n[0]*m0
-	add	%rax,$A0[0]		# n[0]*m0+t[0]
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A0[1]
-	mov	$n0,$m1
-
-	xor	$A0[0],$A0[0]
-	add	8($tptr,$j),$A0[1]
-	adc	\$0,$A0[0]
-	mul	$m0			# n[1]*m0
-	add	%rax,$A0[1]		# n[1]*m0+t[1]
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A0[0]
-
-	imulq	$A0[1],$m1
-
-	mov	16($nptr,$j),$Ni[0]	# n[2]
-	xor	$A1[1],$A1[1]
-	add	$A0[1],$A1[0]
-	adc	\$0,$A1[1]
-	mul	$m1			# n[0]*m1
-	add	%rax,$A1[0]		# n[0]*m1+"t[1]"
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A1[1]
-	mov	$A1[0],8($tptr,$j)	# "t[1]"
-
-	xor	$A0[1],$A0[1]
-	add	16($tptr,$j),$A0[0]
-	adc	\$0,$A0[1]
-	mul	$m0			# n[2]*m0
-	add	%rax,$A0[0]		# n[2]*m0+t[2]
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A0[1]
-
-	mov	24($nptr,$j),$Ni[1]	# n[3]
-	xor	$A1[0],$A1[0]
-	add	$A0[0],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$m1			# n[1]*m1
-	add	%rax,$A1[1]		# n[1]*m1+"t[2]"
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A1[0]
-	mov	$A1[1],16($tptr,$j)	# "t[2]"
-
-	xor	$A0[0],$A0[0]
-	add	24($tptr,$j),$A0[1]
-	lea	32($j),$j
-	adc	\$0,$A0[0]
-	mul	$m0			# n[3]*m0
-	add	%rax,$A0[1]		# n[3]*m0+t[3]
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A0[0]
-	jmp	.Lsqr4x_mont_inner
-
-.align	16
-.Lsqr4x_mont_inner:
-	mov	($nptr,$j),$Ni[0]	# n[4]
-	xor	$A1[1],$A1[1]
-	add	$A0[1],$A1[0]
-	adc	\$0,$A1[1]
-	mul	$m1			# n[2]*m1
-	add	%rax,$A1[0]		# n[2]*m1+"t[3]"
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A1[1]
-	mov	$A1[0],-8($tptr,$j)	# "t[3]"
-
-	xor	$A0[1],$A0[1]
-	add	($tptr,$j),$A0[0]
-	adc	\$0,$A0[1]
-	mul	$m0			# n[4]*m0
-	add	%rax,$A0[0]		# n[4]*m0+t[4]
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A0[1]
-
-	mov	8($nptr,$j),$Ni[1]	# n[5]
-	xor	$A1[0],$A1[0]
-	add	$A0[0],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$m1			# n[3]*m1
-	add	%rax,$A1[1]		# n[3]*m1+"t[4]"
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A1[0]
-	mov	$A1[1],($tptr,$j)	# "t[4]"
-
-	xor	$A0[0],$A0[0]
-	add	8($tptr,$j),$A0[1]
-	adc	\$0,$A0[0]
-	mul	$m0			# n[5]*m0
-	add	%rax,$A0[1]		# n[5]*m0+t[5]
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A0[0]
-
-
-	mov	16($nptr,$j),$Ni[0]	# n[6]
-	xor	$A1[1],$A1[1]
-	add	$A0[1],$A1[0]
-	adc	\$0,$A1[1]
-	mul	$m1			# n[4]*m1
-	add	%rax,$A1[0]		# n[4]*m1+"t[5]"
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A1[1]
-	mov	$A1[0],8($tptr,$j)	# "t[5]"
-
-	xor	$A0[1],$A0[1]
-	add	16($tptr,$j),$A0[0]
-	adc	\$0,$A0[1]
-	mul	$m0			# n[6]*m0
-	add	%rax,$A0[0]		# n[6]*m0+t[6]
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A0[1]
-
-	mov	24($nptr,$j),$Ni[1]	# n[7]
-	xor	$A1[0],$A1[0]
-	add	$A0[0],$A1[1]
-	adc	\$0,$A1[0]
-	mul	$m1			# n[5]*m1
-	add	%rax,$A1[1]		# n[5]*m1+"t[6]"
-	 mov	$Ni[1],%rax
-	adc	%rdx,$A1[0]
-	mov	$A1[1],16($tptr,$j)	# "t[6]"
-
-	xor	$A0[0],$A0[0]
-	add	24($tptr,$j),$A0[1]
-	lea	32($j),$j
-	adc	\$0,$A0[0]
-	mul	$m0			# n[7]*m0
-	add	%rax,$A0[1]		# n[7]*m0+t[7]
-	 mov	$Ni[0],%rax
-	adc	%rdx,$A0[0]
-	cmp	\$0,$j
-	jne	.Lsqr4x_mont_inner
-
-	 sub	0(%rsp),$j		# $j=-$num	# modsched #
-	 mov	$n0,$m0			#		# modsched #
-
-	xor	$A1[1],$A1[1]
-	add	$A0[1],$A1[0]
-	adc	\$0,$A1[1]
-	mul	$m1			# n[6]*m1
-	add	%rax,$A1[0]		# n[6]*m1+"t[7]"
-	mov	$Ni[1],%rax
-	adc	%rdx,$A1[1]
-	mov	$A1[0],-8($tptr)	# "t[7]"
-
-	xor	$A0[1],$A0[1]
-	add	($tptr),$A0[0]		# +t[8]
-	adc	\$0,$A0[1]
-	 mov	0($nptr,$j),$Ni[0]	# n[0]		# modsched #
-	add	$topbit,$A0[0]
-	adc	\$0,$A0[1]
-
-	 imulq	16($tptr,$j),$m0	# m0=t[0]*n0	# modsched #
-	xor	$A1[0],$A1[0]
-	 mov	8($nptr,$j),$Ni[1]	# n[1]		# modsched #
-	add	$A0[0],$A1[1]
-	 mov	16($tptr,$j),$A0[0]	# t[0]		# modsched #
-	adc	\$0,$A1[0]
-	mul	$m1			# n[7]*m1
-	add	%rax,$A1[1]		# n[7]*m1+"t[8]"
-	 mov	$Ni[0],%rax		#		# modsched #
-	adc	%rdx,$A1[0]
-	mov	$A1[1],($tptr)		# "t[8]"
-
-	xor	$topbit,$topbit
-	add	8($tptr),$A1[0]		# +t[9]
-	adc	$topbit,$topbit
-	add	$A0[1],$A1[0]
-	lea	16($tptr),$tptr		# "t[$num]>>128"
-	adc	\$0,$topbit
-	mov	$A1[0],-8($tptr)	# "t[9]"
-	cmp	8(%rsp),$tptr		# are we done?
-	jb	.Lsqr4x_mont_outer
-
-	mov	0(%rsp),$num		# restore $num
-	mov	$topbit,($tptr)		# save $topbit
-___
-}
-##############################################################
-# Post-condition, 4x unrolled copy from bn_mul_mont
-#
-{
-my ($tptr,$nptr)=("%rbx",$aptr);
-my @ri=("%rax","%rdx","%r10","%r11");
-$code.=<<___;
-	mov	64(%rsp,$num),@ri[0]	# tp[0]
-	lea	64(%rsp,$num),$tptr	# upper half of t[2*$num] holds result
-	mov	40(%rsp),$nptr		# restore $nptr
-	shr	\$5,$num		# num/4
-	mov	8($tptr),@ri[1]		# t[1]
-	xor	$i,$i			# i=0 and clear CF!
-
-	mov	32(%rsp),$rptr		# restore $rptr
-	sub	0($nptr),@ri[0]
-	mov	16($tptr),@ri[2]	# t[2]
-	mov	24($tptr),@ri[3]	# t[3]
-	sbb	8($nptr),@ri[1]
-	lea	-1($num),$j		# j=num/4-1
-	jmp	.Lsqr4x_sub
-.align	16
-.Lsqr4x_sub:
-	mov	@ri[0],0($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	@ri[1],8($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	16($nptr,$i,8),@ri[2]
-	mov	32($tptr,$i,8),@ri[0]	# tp[i+1]
-	mov	40($tptr,$i,8),@ri[1]
-	sbb	24($nptr,$i,8),@ri[3]
-	mov	@ri[2],16($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	@ri[3],24($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	32($nptr,$i,8),@ri[0]
-	mov	48($tptr,$i,8),@ri[2]
-	mov	56($tptr,$i,8),@ri[3]
-	sbb	40($nptr,$i,8),@ri[1]
-	lea	4($i),$i		# i++
-	dec	$j			# doesn't affect CF!
-	jnz	.Lsqr4x_sub
-
-	mov	@ri[0],0($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	mov	32($tptr,$i,8),@ri[0]	# load overflow bit
-	sbb	16($nptr,$i,8),@ri[2]
-	mov	@ri[1],8($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	sbb	24($nptr,$i,8),@ri[3]
-	mov	@ri[2],16($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-
-	sbb	\$0,@ri[0]		# handle upmost overflow bit
-	mov	@ri[3],24($rptr,$i,8)	# rp[i]=tp[i]-np[i]
-	xor	$i,$i			# i=0
-	and	@ri[0],$tptr
-	not	@ri[0]
-	mov	$rptr,$nptr
-	and	@ri[0],$nptr
-	lea	-1($num),$j
-	or	$nptr,$tptr		# tp=borrow?tp:rp
-
-	pxor	%xmm0,%xmm0
-	lea	64(%rsp,$num,8),$nptr
-	movdqu	($tptr),%xmm1
-	lea	($nptr,$num,8),$nptr
-	movdqa	%xmm0,64(%rsp)		# zap lower half of temporary vector
-	movdqa	%xmm0,($nptr)		# zap upper half of temporary vector
-	movdqu	%xmm1,($rptr)
-	jmp	.Lsqr4x_copy
-.align	16
-.Lsqr4x_copy:				# copy or in-place refresh
-	movdqu	16($tptr,$i),%xmm2
-	movdqu	32($tptr,$i),%xmm1
-	movdqa	%xmm0,80(%rsp,$i)	# zap lower half of temporary vector
-	movdqa	%xmm0,96(%rsp,$i)	# zap lower half of temporary vector
-	movdqa	%xmm0,16($nptr,$i)	# zap upper half of temporary vector
-	movdqa	%xmm0,32($nptr,$i)	# zap upper half of temporary vector
-	movdqu	%xmm2,16($rptr,$i)
-	movdqu	%xmm1,32($rptr,$i)
-	lea	32($i),$i
-	dec	$j
-	jnz	.Lsqr4x_copy
-
-	movdqu	16($tptr,$i),%xmm2
-	movdqa	%xmm0,80(%rsp,$i)	# zap lower half of temporary vector
-	movdqa	%xmm0,16($nptr,$i)	# zap upper half of temporary vector
-	movdqu	%xmm2,16($rptr,$i)
-___
-}
-$code.=<<___;
-	mov	56(%rsp),%rsi		# restore %rsp
-	mov	\$1,%rax
-	mov	0(%rsi),%r15
-	mov	8(%rsi),%r14
-	mov	16(%rsi),%r13
-	mov	24(%rsi),%r12
-	mov	32(%rsi),%rbp
-	mov	40(%rsi),%rbx
-	lea	48(%rsi),%rsp
-.Lsqr4x_epilogue:
-	ret
-.size	bn_sqr4x_mont,.-bn_sqr4x_mont
-___
-}}}
-$code.=<<___;
-.asciz	"Montgomery Multiplication for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
-.align	16
-___
-
-# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
-#		CONTEXT *context,DISPATCHER_CONTEXT *disp)
-if ($win64) {
-$rec="%rcx";
-$frame="%rdx";
-$context="%r8";
-$disp="%r9";
-
-$code.=<<___;
-.extern	__imp_RtlVirtualUnwind
-.type	mul_handler,\@abi-omnipotent
-.align	16
-mul_handler:
-	push	%rsi
-	push	%rdi
-	push	%rbx
-	push	%rbp
-	push	%r12
-	push	%r13
-	push	%r14
-	push	%r15
-	pushfq
-	sub	\$64,%rsp
-
-	mov	120($context),%rax	# pull context->Rax
-	mov	248($context),%rbx	# pull context->Rip
-
-	mov	8($disp),%rsi		# disp->ImageBase
-	mov	56($disp),%r11		# disp->HandlerData
-
-	mov	0(%r11),%r10d		# HandlerData[0]
-	lea	(%rsi,%r10),%r10	# end of prologue label
-	cmp	%r10,%rbx		# context->Rip<end of prologue label
-	jb	.Lcommon_seh_tail
-
-	mov	152($context),%rax	# pull context->Rsp
-
-	mov	4(%r11),%r10d		# HandlerData[1]
-	lea	(%rsi,%r10),%r10	# epilogue label
-	cmp	%r10,%rbx		# context->Rip>=epilogue label
-	jae	.Lcommon_seh_tail
-
-	mov	192($context),%r10	# pull $num
-	mov	8(%rax,%r10,8),%rax	# pull saved stack pointer
-	lea	48(%rax),%rax
-
-	mov	-8(%rax),%rbx
-	mov	-16(%rax),%rbp
-	mov	-24(%rax),%r12
-	mov	-32(%rax),%r13
-	mov	-40(%rax),%r14
-	mov	-48(%rax),%r15
-	mov	%rbx,144($context)	# restore context->Rbx
-	mov	%rbp,160($context)	# restore context->Rbp
-	mov	%r12,216($context)	# restore context->R12
-	mov	%r13,224($context)	# restore context->R13
-	mov	%r14,232($context)	# restore context->R14
-	mov	%r15,240($context)	# restore context->R15
-
-	jmp	.Lcommon_seh_tail
-.size	mul_handler,.-mul_handler
-
-.type	sqr_handler,\@abi-omnipotent
-.align	16
-sqr_handler:
-	push	%rsi
-	push	%rdi
-	push	%rbx
-	push	%rbp
-	push	%r12
-	push	%r13
-	push	%r14
-	push	%r15
-	pushfq
-	sub	\$64,%rsp
-
-	mov	120($context),%rax	# pull context->Rax
-	mov	248($context),%rbx	# pull context->Rip
-
-	lea	.Lsqr4x_body(%rip),%r10
-	cmp	%r10,%rbx		# context->Rip<.Lsqr_body
-	jb	.Lcommon_seh_tail
-
-	mov	152($context),%rax	# pull context->Rsp
-
-	lea	.Lsqr4x_epilogue(%rip),%r10
-	cmp	%r10,%rbx		# context->Rip>=.Lsqr_epilogue
-	jae	.Lcommon_seh_tail
-
-	mov	56(%rax),%rax		# pull saved stack pointer
-	lea	48(%rax),%rax
-
-	mov	-8(%rax),%rbx
-	mov	-16(%rax),%rbp
-	mov	-24(%rax),%r12
-	mov	-32(%rax),%r13
-	mov	-40(%rax),%r14
-	mov	-48(%rax),%r15
-	mov	%rbx,144($context)	# restore context->Rbx
-	mov	%rbp,160($context)	# restore context->Rbp
-	mov	%r12,216($context)	# restore context->R12
-	mov	%r13,224($context)	# restore context->R13
-	mov	%r14,232($context)	# restore context->R14
-	mov	%r15,240($context)	# restore context->R15
-
-.Lcommon_seh_tail:
-	mov	8(%rax),%rdi
-	mov	16(%rax),%rsi
-	mov	%rax,152($context)	# restore context->Rsp
-	mov	%rsi,168($context)	# restore context->Rsi
-	mov	%rdi,176($context)	# restore context->Rdi
-
-	mov	40($disp),%rdi		# disp->ContextRecord
-	mov	$context,%rsi		# context
-	mov	\$154,%ecx		# sizeof(CONTEXT)
-	.long	0xa548f3fc		# cld; rep movsq
-
-	mov	$disp,%rsi
-	xor	%rcx,%rcx		# arg1, UNW_FLAG_NHANDLER
-	mov	8(%rsi),%rdx		# arg2, disp->ImageBase
-	mov	0(%rsi),%r8		# arg3, disp->ControlPc
-	mov	16(%rsi),%r9		# arg4, disp->FunctionEntry
-	mov	40(%rsi),%r10		# disp->ContextRecord
-	lea	56(%rsi),%r11		# &disp->HandlerData
-	lea	24(%rsi),%r12		# &disp->EstablisherFrame
-	mov	%r10,32(%rsp)		# arg5
-	mov	%r11,40(%rsp)		# arg6
-	mov	%r12,48(%rsp)		# arg7
-	mov	%rcx,56(%rsp)		# arg8, (NULL)
-	call	*__imp_RtlVirtualUnwind(%rip)
-
-	mov	\$1,%eax		# ExceptionContinueSearch
-	add	\$64,%rsp
-	popfq
-	pop	%r15
-	pop	%r14
-	pop	%r13
-	pop	%r12
-	pop	%rbp
-	pop	%rbx
-	pop	%rdi
-	pop	%rsi
-	ret
-.size	sqr_handler,.-sqr_handler
-
-.section	.pdata
-.align	4
-	.rva	.LSEH_begin_bn_mul_mont
-	.rva	.LSEH_end_bn_mul_mont
-	.rva	.LSEH_info_bn_mul_mont
-
-	.rva	.LSEH_begin_bn_mul4x_mont
-	.rva	.LSEH_end_bn_mul4x_mont
-	.rva	.LSEH_info_bn_mul4x_mont
-
-	.rva	.LSEH_begin_bn_sqr4x_mont
-	.rva	.LSEH_end_bn_sqr4x_mont
-	.rva	.LSEH_info_bn_sqr4x_mont
-
-.section	.xdata
-.align	8
-.LSEH_info_bn_mul_mont:
-	.byte	9,0,0,0
-	.rva	mul_handler
-	.rva	.Lmul_body,.Lmul_epilogue	# HandlerData[]
-.LSEH_info_bn_mul4x_mont:
-	.byte	9,0,0,0
-	.rva	mul_handler
-	.rva	.Lmul4x_body,.Lmul4x_epilogue	# HandlerData[]
-.LSEH_info_bn_sqr4x_mont:
-	.byte	9,0,0,0
-	.rva	sqr_handler
-___
-}
-
-print $code;
-close STDOUT;