From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl | 1967 +++++++++++++++++++++++++++++
 1 file changed, 1967 insertions(+)
 create mode 100755 openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl

(limited to 'openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl')

diff --git a/openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl b/openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl
new file mode 100755
index 0000000..46d746b
--- /dev/null
+++ b/openssl-1.1.0h/crypto/bn/asm/rsaz-avx2.pl
@@ -0,0 +1,1967 @@
+#! /usr/bin/env perl
+# Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+
+##############################################################################
+#                                                                            #
+#  Copyright (c) 2012, Intel Corporation                                     #
+#                                                                            #
+#  All rights reserved.                                                      #
+#                                                                            #
+#  Redistribution and use in source and binary forms, with or without        #
+#  modification, are permitted provided that the following conditions are    #
+#  met:                                                                      #
+#                                                                            #
+#  *  Redistributions of source code must retain the above copyright         #
+#     notice, this list of conditions and the following disclaimer.          #
+#                                                                            #
+#  *  Redistributions in binary form must reproduce the above copyright      #
+#     notice, this list of conditions and the following disclaimer in the    #
+#     documentation and/or other materials provided with the                 #
+#     distribution.                                                          #
+#                                                                            #
+#  *  Neither the name of the Intel Corporation nor the names of its         #
+#     contributors may be used to endorse or promote products derived from   #
+#     this software without specific prior written permission.               #
+#                                                                            #
+#                                                                            #
+#  THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY          #
+#  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE         #
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR        #
+#  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR            #
+#  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,     #
+#  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       #
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        #
+#  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    #
+#  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      #
+#  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        #
+#  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              #
+#                                                                            #
+##############################################################################
+# Developers and authors:                                                    #
+# Shay Gueron (1, 2), and Vlad Krasnov (1)                                   #
+# (1) Intel Corporation, Israel Development Center, Haifa, Israel            #
+# (2) University of Haifa, Israel                                            #
+##############################################################################
+# Reference:                                                                 #
+# [1] S. Gueron, V. Krasnov: "Software Implementation of Modular             #
+#     Exponentiation,  Using Advanced Vector Instructions Architectures",    #
+#     F. Ozbudak and F. Rodriguez-Henriquez (Eds.): WAIFI 2012, LNCS 7369,   #
+#     pp. 119?135, 2012. Springer-Verlag Berlin Heidelberg 2012              #
+# [2] S. Gueron: "Efficient Software Implementations of Modular              #
+#     Exponentiation", Journal of Cryptographic Engineering 2:31-43 (2012).  #
+# [3] S. Gueron, V. Krasnov: "Speeding up Big-numbers Squaring",IEEE         #
+#     Proceedings of 9th International Conference on Information Technology: #
+#     New Generations (ITNG 2012), pp.821-823 (2012)                         #
+# [4] S. Gueron, V. Krasnov: "[PATCH] Efficient and side channel analysis    #
+#     resistant 1024-bit modular exponentiation, for optimizing RSA2048      #
+#     on AVX2 capable x86_64 platforms",                                     #
+#     http://rt.openssl.org/Ticket/Display.html?id=2850&user=guest&pass=guest#
+##############################################################################
+#
+# +13% improvement over original submission by <appro@openssl.org>
+#
+# rsa2048 sign/sec	OpenSSL 1.0.1	scalar(*)	this
+# 2.3GHz Haswell	621		765/+23%	1113/+79%
+# 2.3GHz Broadwell(**)	688		1200(***)/+74%	1120/+63%
+#
+# (*)	if system doesn't support AVX2, for reference purposes;
+# (**)	scaled to 2.3GHz to simplify comparison;
+# (***)	scalar AD*X code is faster than AVX2 and is preferred code
+#	path for Broadwell;
+
+$flavour = shift;
+$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 $xlate) or
+die "can't locate x86_64-xlate.pl";
+
+if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
+		=~ /GNU assembler version ([2-9]\.[0-9]+)/) {
+	$avx = ($1>=2.19) + ($1>=2.22);
+	$addx = ($1>=2.23);
+}
+
+if (!$avx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
+	    `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
+	$avx = ($1>=2.09) + ($1>=2.10);
+	$addx = ($1>=2.10);
+}
+
+if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
+	    `ml64 2>&1` =~ /Version ([0-9]+)\./) {
+	$avx = ($1>=10) + ($1>=11);
+	$addx = ($1>=11);
+}
+
+if (!$avx && `$ENV{CC} -v 2>&1` =~ /(^clang version|based on LLVM) ([3-9])\.([0-9]+)/) {
+	my $ver = $2 + $3/100.0;	# 3.1->3.01, 3.10->3.10
+	$avx = ($ver>=3.0) + ($ver>=3.01);
+	$addx = ($ver>=3.03);
+}
+
+open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\"";
+*STDOUT = *OUT;
+
+if ($avx>1) {{{
+{ # void AMS_WW(
+my $rp="%rdi";	# BN_ULONG *rp,
+my $ap="%rsi";	# const BN_ULONG *ap,
+my $np="%rdx";	# const BN_ULONG *np,
+my $n0="%ecx";	# const BN_ULONG n0,
+my $rep="%r8d";	# int repeat);
+
+# The registers that hold the accumulated redundant result
+# The AMM works on 1024 bit operands, and redundant word size is 29
+# Therefore: ceil(1024/29)/4 = 9
+my $ACC0="%ymm0";
+my $ACC1="%ymm1";
+my $ACC2="%ymm2";
+my $ACC3="%ymm3";
+my $ACC4="%ymm4";
+my $ACC5="%ymm5";
+my $ACC6="%ymm6";
+my $ACC7="%ymm7";
+my $ACC8="%ymm8";
+my $ACC9="%ymm9";
+# Registers that hold the broadcasted words of bp, currently used
+my $B1="%ymm10";
+my $B2="%ymm11";
+# Registers that hold the broadcasted words of Y, currently used
+my $Y1="%ymm12";
+my $Y2="%ymm13";
+# Helper registers
+my $TEMP1="%ymm14";
+my $AND_MASK="%ymm15";
+# alu registers that hold the first words of the ACC
+my $r0="%r9";
+my $r1="%r10";
+my $r2="%r11";
+my $r3="%r12";
+
+my $i="%r14d";			# loop counter
+my $tmp = "%r15";
+
+my $FrameSize=32*18+32*8;	# place for A^2 and 2*A
+
+my $aap=$r0;
+my $tp0="%rbx";
+my $tp1=$r3;
+my $tpa=$tmp;
+
+$np="%r13";			# reassigned argument
+
+$code.=<<___;
+.text
+
+.globl	rsaz_1024_sqr_avx2
+.type	rsaz_1024_sqr_avx2,\@function,5
+.align	64
+rsaz_1024_sqr_avx2:		# 702 cycles, 14% faster than rsaz_1024_mul_avx2
+	lea	(%rsp), %rax
+	push	%rbx
+	push	%rbp
+	push	%r12
+	push	%r13
+	push	%r14
+	push	%r15
+	vzeroupper
+___
+$code.=<<___ if ($win64);
+	lea	-0xa8(%rsp),%rsp
+	vmovaps	%xmm6,-0xd8(%rax)
+	vmovaps	%xmm7,-0xc8(%rax)
+	vmovaps	%xmm8,-0xb8(%rax)
+	vmovaps	%xmm9,-0xa8(%rax)
+	vmovaps	%xmm10,-0x98(%rax)
+	vmovaps	%xmm11,-0x88(%rax)
+	vmovaps	%xmm12,-0x78(%rax)
+	vmovaps	%xmm13,-0x68(%rax)
+	vmovaps	%xmm14,-0x58(%rax)
+	vmovaps	%xmm15,-0x48(%rax)
+.Lsqr_1024_body:
+___
+$code.=<<___;
+	mov	%rax,%rbp
+	mov	%rdx, $np			# reassigned argument
+	sub	\$$FrameSize, %rsp
+	mov	$np, $tmp
+	sub	\$-128, $rp			# size optimization
+	sub	\$-128, $ap
+	sub	\$-128, $np
+
+	and	\$4095, $tmp			# see if $np crosses page
+	add	\$32*10, $tmp
+	shr	\$12, $tmp
+	vpxor	$ACC9,$ACC9,$ACC9
+	jz	.Lsqr_1024_no_n_copy
+
+	# unaligned 256-bit load that crosses page boundary can
+	# cause >2x performance degradation here, so if $np does
+	# cross page boundary, copy it to stack and make sure stack
+	# frame doesn't...
+	sub		\$32*10,%rsp
+	vmovdqu		32*0-128($np), $ACC0
+	and		\$-2048, %rsp
+	vmovdqu		32*1-128($np), $ACC1
+	vmovdqu		32*2-128($np), $ACC2
+	vmovdqu		32*3-128($np), $ACC3
+	vmovdqu		32*4-128($np), $ACC4
+	vmovdqu		32*5-128($np), $ACC5
+	vmovdqu		32*6-128($np), $ACC6
+	vmovdqu		32*7-128($np), $ACC7
+	vmovdqu		32*8-128($np), $ACC8
+	lea		$FrameSize+128(%rsp),$np
+	vmovdqu		$ACC0, 32*0-128($np)
+	vmovdqu		$ACC1, 32*1-128($np)
+	vmovdqu		$ACC2, 32*2-128($np)
+	vmovdqu		$ACC3, 32*3-128($np)
+	vmovdqu		$ACC4, 32*4-128($np)
+	vmovdqu		$ACC5, 32*5-128($np)
+	vmovdqu		$ACC6, 32*6-128($np)
+	vmovdqu		$ACC7, 32*7-128($np)
+	vmovdqu		$ACC8, 32*8-128($np)
+	vmovdqu		$ACC9, 32*9-128($np)	# $ACC9 is zero
+
+.Lsqr_1024_no_n_copy:
+	and		\$-1024, %rsp
+
+	vmovdqu		32*1-128($ap), $ACC1
+	vmovdqu		32*2-128($ap), $ACC2
+	vmovdqu		32*3-128($ap), $ACC3
+	vmovdqu		32*4-128($ap), $ACC4
+	vmovdqu		32*5-128($ap), $ACC5
+	vmovdqu		32*6-128($ap), $ACC6
+	vmovdqu		32*7-128($ap), $ACC7
+	vmovdqu		32*8-128($ap), $ACC8
+
+	lea	192(%rsp), $tp0			# 64+128=192
+	vmovdqu	.Land_mask(%rip), $AND_MASK
+	jmp	.LOOP_GRANDE_SQR_1024
+
+.align	32
+.LOOP_GRANDE_SQR_1024:
+	lea	32*18+128(%rsp), $aap		# size optimization
+	lea	448(%rsp), $tp1			# 64+128+256=448
+
+	# the squaring is performed as described in Variant B of
+	# "Speeding up Big-Number Squaring", so start by calculating
+	# the A*2=A+A vector
+	vpaddq		$ACC1, $ACC1, $ACC1
+	 vpbroadcastq	32*0-128($ap), $B1
+	vpaddq		$ACC2, $ACC2, $ACC2
+	vmovdqa		$ACC1, 32*0-128($aap)
+	vpaddq		$ACC3, $ACC3, $ACC3
+	vmovdqa		$ACC2, 32*1-128($aap)
+	vpaddq		$ACC4, $ACC4, $ACC4
+	vmovdqa		$ACC3, 32*2-128($aap)
+	vpaddq		$ACC5, $ACC5, $ACC5
+	vmovdqa		$ACC4, 32*3-128($aap)
+	vpaddq		$ACC6, $ACC6, $ACC6
+	vmovdqa		$ACC5, 32*4-128($aap)
+	vpaddq		$ACC7, $ACC7, $ACC7
+	vmovdqa		$ACC6, 32*5-128($aap)
+	vpaddq		$ACC8, $ACC8, $ACC8
+	vmovdqa		$ACC7, 32*6-128($aap)
+	vpxor		$ACC9, $ACC9, $ACC9
+	vmovdqa		$ACC8, 32*7-128($aap)
+
+	vpmuludq	32*0-128($ap), $B1, $ACC0
+	 vpbroadcastq	32*1-128($ap), $B2
+	 vmovdqu	$ACC9, 32*9-192($tp0)	# zero upper half
+	vpmuludq	$B1, $ACC1, $ACC1
+	 vmovdqu	$ACC9, 32*10-448($tp1)
+	vpmuludq	$B1, $ACC2, $ACC2
+	 vmovdqu	$ACC9, 32*11-448($tp1)
+	vpmuludq	$B1, $ACC3, $ACC3
+	 vmovdqu	$ACC9, 32*12-448($tp1)
+	vpmuludq	$B1, $ACC4, $ACC4
+	 vmovdqu	$ACC9, 32*13-448($tp1)
+	vpmuludq	$B1, $ACC5, $ACC5
+	 vmovdqu	$ACC9, 32*14-448($tp1)
+	vpmuludq	$B1, $ACC6, $ACC6
+	 vmovdqu	$ACC9, 32*15-448($tp1)
+	vpmuludq	$B1, $ACC7, $ACC7
+	 vmovdqu	$ACC9, 32*16-448($tp1)
+	vpmuludq	$B1, $ACC8, $ACC8
+	 vpbroadcastq	32*2-128($ap), $B1
+	 vmovdqu	$ACC9, 32*17-448($tp1)
+
+	mov	$ap, $tpa
+	mov 	\$4, $i
+	jmp	.Lsqr_entry_1024
+___
+$TEMP0=$Y1;
+$TEMP2=$Y2;
+$code.=<<___;
+.align	32
+.LOOP_SQR_1024:
+	 vpbroadcastq	32*1-128($tpa), $B2
+	vpmuludq	32*0-128($ap), $B1, $ACC0
+	vpaddq		32*0-192($tp0), $ACC0, $ACC0
+	vpmuludq	32*0-128($aap), $B1, $ACC1
+	vpaddq		32*1-192($tp0), $ACC1, $ACC1
+	vpmuludq	32*1-128($aap), $B1, $ACC2
+	vpaddq		32*2-192($tp0), $ACC2, $ACC2
+	vpmuludq	32*2-128($aap), $B1, $ACC3
+	vpaddq		32*3-192($tp0), $ACC3, $ACC3
+	vpmuludq	32*3-128($aap), $B1, $ACC4
+	vpaddq		32*4-192($tp0), $ACC4, $ACC4
+	vpmuludq	32*4-128($aap), $B1, $ACC5
+	vpaddq		32*5-192($tp0), $ACC5, $ACC5
+	vpmuludq	32*5-128($aap), $B1, $ACC6
+	vpaddq		32*6-192($tp0), $ACC6, $ACC6
+	vpmuludq	32*6-128($aap), $B1, $ACC7
+	vpaddq		32*7-192($tp0), $ACC7, $ACC7
+	vpmuludq	32*7-128($aap), $B1, $ACC8
+	 vpbroadcastq	32*2-128($tpa), $B1
+	vpaddq		32*8-192($tp0), $ACC8, $ACC8
+.Lsqr_entry_1024:
+	vmovdqu		$ACC0, 32*0-192($tp0)
+	vmovdqu		$ACC1, 32*1-192($tp0)
+
+	vpmuludq	32*1-128($ap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC2, $ACC2
+	vpmuludq	32*1-128($aap), $B2, $TEMP1
+	vpaddq		$TEMP1, $ACC3, $ACC3
+	vpmuludq	32*2-128($aap), $B2, $TEMP2
+	vpaddq		$TEMP2, $ACC4, $ACC4
+	vpmuludq	32*3-128($aap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC5, $ACC5
+	vpmuludq	32*4-128($aap), $B2, $TEMP1
+	vpaddq		$TEMP1, $ACC6, $ACC6
+	vpmuludq	32*5-128($aap), $B2, $TEMP2
+	vpaddq		$TEMP2, $ACC7, $ACC7
+	vpmuludq	32*6-128($aap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC8, $ACC8
+	vpmuludq	32*7-128($aap), $B2, $ACC0
+	 vpbroadcastq	32*3-128($tpa), $B2
+	vpaddq		32*9-192($tp0), $ACC0, $ACC0
+
+	vmovdqu		$ACC2, 32*2-192($tp0)
+	vmovdqu		$ACC3, 32*3-192($tp0)
+
+	vpmuludq	32*2-128($ap), $B1, $TEMP2
+	vpaddq		$TEMP2, $ACC4, $ACC4
+	vpmuludq	32*2-128($aap), $B1, $TEMP0
+	vpaddq		$TEMP0, $ACC5, $ACC5
+	vpmuludq	32*3-128($aap), $B1, $TEMP1
+	vpaddq		$TEMP1, $ACC6, $ACC6
+	vpmuludq	32*4-128($aap), $B1, $TEMP2
+	vpaddq		$TEMP2, $ACC7, $ACC7
+	vpmuludq	32*5-128($aap), $B1, $TEMP0
+	vpaddq		$TEMP0, $ACC8, $ACC8
+	vpmuludq	32*6-128($aap), $B1, $TEMP1
+	vpaddq		$TEMP1, $ACC0, $ACC0
+	vpmuludq	32*7-128($aap), $B1, $ACC1
+	 vpbroadcastq	32*4-128($tpa), $B1
+	vpaddq		32*10-448($tp1), $ACC1, $ACC1
+
+	vmovdqu		$ACC4, 32*4-192($tp0)
+	vmovdqu		$ACC5, 32*5-192($tp0)
+
+	vpmuludq	32*3-128($ap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC6, $ACC6
+	vpmuludq	32*3-128($aap), $B2, $TEMP1
+	vpaddq		$TEMP1, $ACC7, $ACC7
+	vpmuludq	32*4-128($aap), $B2, $TEMP2
+	vpaddq		$TEMP2, $ACC8, $ACC8
+	vpmuludq	32*5-128($aap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC0, $ACC0
+	vpmuludq	32*6-128($aap), $B2, $TEMP1
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vpmuludq	32*7-128($aap), $B2, $ACC2
+	 vpbroadcastq	32*5-128($tpa), $B2
+	vpaddq		32*11-448($tp1), $ACC2, $ACC2	
+
+	vmovdqu		$ACC6, 32*6-192($tp0)
+	vmovdqu		$ACC7, 32*7-192($tp0)
+
+	vpmuludq	32*4-128($ap), $B1, $TEMP0
+	vpaddq		$TEMP0, $ACC8, $ACC8
+	vpmuludq	32*4-128($aap), $B1, $TEMP1
+	vpaddq		$TEMP1, $ACC0, $ACC0
+	vpmuludq	32*5-128($aap), $B1, $TEMP2
+	vpaddq		$TEMP2, $ACC1, $ACC1
+	vpmuludq	32*6-128($aap), $B1, $TEMP0
+	vpaddq		$TEMP0, $ACC2, $ACC2
+	vpmuludq	32*7-128($aap), $B1, $ACC3
+	 vpbroadcastq	32*6-128($tpa), $B1
+	vpaddq		32*12-448($tp1), $ACC3, $ACC3
+
+	vmovdqu		$ACC8, 32*8-192($tp0)
+	vmovdqu		$ACC0, 32*9-192($tp0)
+	lea		8($tp0), $tp0
+
+	vpmuludq	32*5-128($ap), $B2, $TEMP2
+	vpaddq		$TEMP2, $ACC1, $ACC1
+	vpmuludq	32*5-128($aap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC2, $ACC2
+	vpmuludq	32*6-128($aap), $B2, $TEMP1
+	vpaddq		$TEMP1, $ACC3, $ACC3
+	vpmuludq	32*7-128($aap), $B2, $ACC4
+	 vpbroadcastq	32*7-128($tpa), $B2
+	vpaddq		32*13-448($tp1), $ACC4, $ACC4
+
+	vmovdqu		$ACC1, 32*10-448($tp1)
+	vmovdqu		$ACC2, 32*11-448($tp1)
+
+	vpmuludq	32*6-128($ap), $B1, $TEMP0
+	vpaddq		$TEMP0, $ACC3, $ACC3
+	vpmuludq	32*6-128($aap), $B1, $TEMP1
+	 vpbroadcastq	32*8-128($tpa), $ACC0		# borrow $ACC0 for $B1
+	vpaddq		$TEMP1, $ACC4, $ACC4
+	vpmuludq	32*7-128($aap), $B1, $ACC5
+	 vpbroadcastq	32*0+8-128($tpa), $B1		# for next iteration
+	vpaddq		32*14-448($tp1), $ACC5, $ACC5
+
+	vmovdqu		$ACC3, 32*12-448($tp1)
+	vmovdqu		$ACC4, 32*13-448($tp1)
+	lea		8($tpa), $tpa
+
+	vpmuludq	32*7-128($ap), $B2, $TEMP0
+	vpaddq		$TEMP0, $ACC5, $ACC5
+	vpmuludq	32*7-128($aap), $B2, $ACC6
+	vpaddq		32*15-448($tp1), $ACC6, $ACC6
+
+	vpmuludq	32*8-128($ap), $ACC0, $ACC7
+	vmovdqu		$ACC5, 32*14-448($tp1)
+	vpaddq		32*16-448($tp1), $ACC7, $ACC7
+	vmovdqu		$ACC6, 32*15-448($tp1)
+	vmovdqu		$ACC7, 32*16-448($tp1)
+	lea		8($tp1), $tp1
+
+	dec	$i        
+	jnz	.LOOP_SQR_1024
+___
+$ZERO = $ACC9;
+$TEMP0 = $B1;
+$TEMP2 = $B2;
+$TEMP3 = $Y1;
+$TEMP4 = $Y2;
+$code.=<<___;
+	# we need to fix indices 32-39 to avoid overflow
+	vmovdqu		32*8(%rsp), $ACC8		# 32*8-192($tp0),
+	vmovdqu		32*9(%rsp), $ACC1		# 32*9-192($tp0)
+	vmovdqu		32*10(%rsp), $ACC2		# 32*10-192($tp0)
+	lea		192(%rsp), $tp0			# 64+128=192
+
+	vpsrlq		\$29, $ACC8, $TEMP1
+	vpand		$AND_MASK, $ACC8, $ACC8
+	vpsrlq		\$29, $ACC1, $TEMP2
+	vpand		$AND_MASK, $ACC1, $ACC1
+
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpxor		$ZERO, $ZERO, $ZERO
+	vpermq		\$0x93, $TEMP2, $TEMP2
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC8, $ACC8
+	vpblendd	\$3, $TEMP2, $ZERO, $TEMP2
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vmovdqu		$ACC1, 32*9-192($tp0)
+	vmovdqu		$ACC2, 32*10-192($tp0)
+
+	mov	(%rsp), %rax
+	mov	8(%rsp), $r1
+	mov	16(%rsp), $r2
+	mov	24(%rsp), $r3
+	vmovdqu	32*1(%rsp), $ACC1
+	vmovdqu	32*2-192($tp0), $ACC2
+	vmovdqu	32*3-192($tp0), $ACC3
+	vmovdqu	32*4-192($tp0), $ACC4
+	vmovdqu	32*5-192($tp0), $ACC5
+	vmovdqu	32*6-192($tp0), $ACC6
+	vmovdqu	32*7-192($tp0), $ACC7
+
+	mov	%rax, $r0
+	imull	$n0, %eax
+	and	\$0x1fffffff, %eax
+	vmovd	%eax, $Y1
+
+	mov	%rax, %rdx
+	imulq	-128($np), %rax
+	 vpbroadcastq	$Y1, $Y1
+	add	%rax, $r0
+	mov	%rdx, %rax
+	imulq	8-128($np), %rax
+	shr	\$29, $r0
+	add	%rax, $r1
+	mov	%rdx, %rax
+	imulq	16-128($np), %rax
+	add	$r0, $r1
+	add	%rax, $r2
+	imulq	24-128($np), %rdx
+	add	%rdx, $r3
+
+	mov	$r1, %rax
+	imull	$n0, %eax
+	and	\$0x1fffffff, %eax
+
+	mov \$9, $i
+	jmp .LOOP_REDUCE_1024
+
+.align	32
+.LOOP_REDUCE_1024:
+	vmovd	%eax, $Y2
+	vpbroadcastq	$Y2, $Y2
+
+	vpmuludq	32*1-128($np), $Y1, $TEMP0
+	 mov	%rax, %rdx
+	 imulq	-128($np), %rax
+	vpaddq		$TEMP0, $ACC1, $ACC1
+	 add	%rax, $r1
+	vpmuludq	32*2-128($np), $Y1, $TEMP1
+	 mov	%rdx, %rax
+	 imulq	8-128($np), %rax
+	vpaddq		$TEMP1, $ACC2, $ACC2
+	vpmuludq	32*3-128($np), $Y1, $TEMP2
+	 .byte	0x67
+	 add	%rax, $r2
+	 .byte	0x67
+	 mov	%rdx, %rax
+	 imulq	16-128($np), %rax
+	 shr	\$29, $r1
+	vpaddq		$TEMP2, $ACC3, $ACC3
+	vpmuludq	32*4-128($np), $Y1, $TEMP0
+	 add	%rax, $r3
+	 add	$r1, $r2
+	vpaddq		$TEMP0, $ACC4, $ACC4
+	vpmuludq	32*5-128($np), $Y1, $TEMP1
+	 mov	$r2, %rax
+	 imull	$n0, %eax
+	vpaddq		$TEMP1, $ACC5, $ACC5
+	vpmuludq	32*6-128($np), $Y1, $TEMP2
+	 and	\$0x1fffffff, %eax
+	vpaddq		$TEMP2, $ACC6, $ACC6
+	vpmuludq	32*7-128($np), $Y1, $TEMP0
+	vpaddq		$TEMP0, $ACC7, $ACC7
+	vpmuludq	32*8-128($np), $Y1, $TEMP1
+	 vmovd	%eax, $Y1
+	 #vmovdqu	32*1-8-128($np), $TEMP2		# moved below
+	vpaddq		$TEMP1, $ACC8, $ACC8
+	 #vmovdqu	32*2-8-128($np), $TEMP0		# moved below
+	 vpbroadcastq	$Y1, $Y1
+
+	vpmuludq	32*1-8-128($np), $Y2, $TEMP2	# see above
+	vmovdqu		32*3-8-128($np), $TEMP1
+	 mov	%rax, %rdx
+	 imulq	-128($np), %rax
+	vpaddq		$TEMP2, $ACC1, $ACC1
+	vpmuludq	32*2-8-128($np), $Y2, $TEMP0	# see above
+	vmovdqu		32*4-8-128($np), $TEMP2
+	 add	%rax, $r2
+	 mov	%rdx, %rax
+	 imulq	8-128($np), %rax
+	vpaddq		$TEMP0, $ACC2, $ACC2
+	 add	$r3, %rax
+	 shr	\$29, $r2
+	vpmuludq	$Y2, $TEMP1, $TEMP1
+	vmovdqu		32*5-8-128($np), $TEMP0
+	 add	$r2, %rax
+	vpaddq		$TEMP1, $ACC3, $ACC3
+	vpmuludq	$Y2, $TEMP2, $TEMP2
+	vmovdqu		32*6-8-128($np), $TEMP1
+	 .byte	0x67
+	 mov	%rax, $r3
+	 imull	$n0, %eax
+	vpaddq		$TEMP2, $ACC4, $ACC4
+	vpmuludq	$Y2, $TEMP0, $TEMP0
+	.byte	0xc4,0x41,0x7e,0x6f,0x9d,0x58,0x00,0x00,0x00	# vmovdqu		32*7-8-128($np), $TEMP2
+	 and	\$0x1fffffff, %eax
+	vpaddq		$TEMP0, $ACC5, $ACC5
+	vpmuludq	$Y2, $TEMP1, $TEMP1
+	vmovdqu		32*8-8-128($np), $TEMP0
+	vpaddq		$TEMP1, $ACC6, $ACC6
+	vpmuludq	$Y2, $TEMP2, $TEMP2
+	vmovdqu		32*9-8-128($np), $ACC9
+	 vmovd	%eax, $ACC0			# borrow ACC0 for Y2
+	 imulq	-128($np), %rax
+	vpaddq		$TEMP2, $ACC7, $ACC7
+	vpmuludq	$Y2, $TEMP0, $TEMP0
+	 vmovdqu	32*1-16-128($np), $TEMP1
+	 vpbroadcastq	$ACC0, $ACC0
+	vpaddq		$TEMP0, $ACC8, $ACC8
+	vpmuludq	$Y2, $ACC9, $ACC9
+	 vmovdqu	32*2-16-128($np), $TEMP2
+	 add	%rax, $r3
+
+___
+($ACC0,$Y2)=($Y2,$ACC0);
+$code.=<<___;
+	 vmovdqu	32*1-24-128($np), $ACC0
+	vpmuludq	$Y1, $TEMP1, $TEMP1
+	vmovdqu		32*3-16-128($np), $TEMP0
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	 vpmuludq	$Y2, $ACC0, $ACC0
+	vpmuludq	$Y1, $TEMP2, $TEMP2
+	.byte	0xc4,0x41,0x7e,0x6f,0xb5,0xf0,0xff,0xff,0xff	# vmovdqu		32*4-16-128($np), $TEMP1
+	 vpaddq		$ACC1, $ACC0, $ACC0
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vpmuludq	$Y1, $TEMP0, $TEMP0
+	vmovdqu		32*5-16-128($np), $TEMP2
+	 .byte	0x67
+	 vmovq		$ACC0, %rax
+	 vmovdqu	$ACC0, (%rsp)		# transfer $r0-$r3
+	vpaddq		$TEMP0, $ACC3, $ACC3
+	vpmuludq	$Y1, $TEMP1, $TEMP1
+	vmovdqu		32*6-16-128($np), $TEMP0
+	vpaddq		$TEMP1, $ACC4, $ACC4
+	vpmuludq	$Y1, $TEMP2, $TEMP2
+	vmovdqu		32*7-16-128($np), $TEMP1
+	vpaddq		$TEMP2, $ACC5, $ACC5
+	vpmuludq	$Y1, $TEMP0, $TEMP0
+	vmovdqu		32*8-16-128($np), $TEMP2
+	vpaddq		$TEMP0, $ACC6, $ACC6
+	vpmuludq	$Y1, $TEMP1, $TEMP1
+	 shr	\$29, $r3
+	vmovdqu		32*9-16-128($np), $TEMP0
+	 add	$r3, %rax
+	vpaddq		$TEMP1, $ACC7, $ACC7
+	vpmuludq	$Y1, $TEMP2, $TEMP2
+	 #vmovdqu	32*2-24-128($np), $TEMP1	# moved below
+	 mov	%rax, $r0
+	 imull	$n0, %eax
+	vpaddq		$TEMP2, $ACC8, $ACC8
+	vpmuludq	$Y1, $TEMP0, $TEMP0
+	 and	\$0x1fffffff, %eax
+	 vmovd	%eax, $Y1
+	 vmovdqu	32*3-24-128($np), $TEMP2
+	.byte	0x67
+	vpaddq		$TEMP0, $ACC9, $ACC9
+	 vpbroadcastq	$Y1, $Y1
+
+	vpmuludq	32*2-24-128($np), $Y2, $TEMP1	# see above
+	vmovdqu		32*4-24-128($np), $TEMP0
+	 mov	%rax, %rdx
+	 imulq	-128($np), %rax
+	 mov	8(%rsp), $r1
+	vpaddq		$TEMP1, $ACC2, $ACC1
+	vpmuludq	$Y2, $TEMP2, $TEMP2
+	vmovdqu		32*5-24-128($np), $TEMP1
+	 add	%rax, $r0
+	 mov	%rdx, %rax
+	 imulq	8-128($np), %rax
+	 .byte	0x67
+	 shr	\$29, $r0
+	 mov	16(%rsp), $r2
+	vpaddq		$TEMP2, $ACC3, $ACC2
+	vpmuludq	$Y2, $TEMP0, $TEMP0
+	vmovdqu		32*6-24-128($np), $TEMP2
+	 add	%rax, $r1
+	 mov	%rdx, %rax
+	 imulq	16-128($np), %rax
+	vpaddq		$TEMP0, $ACC4, $ACC3
+	vpmuludq	$Y2, $TEMP1, $TEMP1
+	vmovdqu		32*7-24-128($np), $TEMP0
+	 imulq	24-128($np), %rdx		# future $r3
+	 add	%rax, $r2
+	 lea	($r0,$r1), %rax
+	vpaddq		$TEMP1, $ACC5, $ACC4
+	vpmuludq	$Y2, $TEMP2, $TEMP2
+	vmovdqu		32*8-24-128($np), $TEMP1
+	 mov	%rax, $r1
+	 imull	$n0, %eax
+	vpmuludq	$Y2, $TEMP0, $TEMP0
+	vpaddq		$TEMP2, $ACC6, $ACC5
+	vmovdqu		32*9-24-128($np), $TEMP2
+	 and	\$0x1fffffff, %eax
+	vpaddq		$TEMP0, $ACC7, $ACC6
+	vpmuludq	$Y2, $TEMP1, $TEMP1
+	 add	24(%rsp), %rdx
+	vpaddq		$TEMP1, $ACC8, $ACC7
+	vpmuludq	$Y2, $TEMP2, $TEMP2
+	vpaddq		$TEMP2, $ACC9, $ACC8
+	 vmovq	$r3, $ACC9
+	 mov	%rdx, $r3
+
+	dec	$i
+	jnz	.LOOP_REDUCE_1024
+___
+($ACC0,$Y2)=($Y2,$ACC0);
+$code.=<<___;
+	lea	448(%rsp), $tp1			# size optimization
+	vpaddq	$ACC9, $Y2, $ACC0
+	vpxor	$ZERO, $ZERO, $ZERO
+
+	vpaddq		32*9-192($tp0), $ACC0, $ACC0
+	vpaddq		32*10-448($tp1), $ACC1, $ACC1
+	vpaddq		32*11-448($tp1), $ACC2, $ACC2
+	vpaddq		32*12-448($tp1), $ACC3, $ACC3
+	vpaddq		32*13-448($tp1), $ACC4, $ACC4
+	vpaddq		32*14-448($tp1), $ACC5, $ACC5
+	vpaddq		32*15-448($tp1), $ACC6, $ACC6
+	vpaddq		32*16-448($tp1), $ACC7, $ACC7
+	vpaddq		32*17-448($tp1), $ACC8, $ACC8
+
+	vpsrlq		\$29, $ACC0, $TEMP1
+	vpand		$AND_MASK, $ACC0, $ACC0
+	vpsrlq		\$29, $ACC1, $TEMP2
+	vpand		$AND_MASK, $ACC1, $ACC1
+	vpsrlq		\$29, $ACC2, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC2, $ACC2
+	vpsrlq		\$29, $ACC3, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC3, $ACC3
+	vpermq		\$0x93, $TEMP3, $TEMP3
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP4, $TEMP4
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC0, $ACC0
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vpblendd	\$3, $TEMP4, $ZERO, $TEMP4
+	vpaddq		$TEMP3, $ACC3, $ACC3
+	vpaddq		$TEMP4, $ACC4, $ACC4
+
+	vpsrlq		\$29, $ACC0, $TEMP1
+	vpand		$AND_MASK, $ACC0, $ACC0
+	vpsrlq		\$29, $ACC1, $TEMP2
+	vpand		$AND_MASK, $ACC1, $ACC1
+	vpsrlq		\$29, $ACC2, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC2, $ACC2
+	vpsrlq		\$29, $ACC3, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC3, $ACC3
+	vpermq		\$0x93, $TEMP3, $TEMP3
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP4, $TEMP4
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC0, $ACC0
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vmovdqu		$ACC0, 32*0-128($rp)
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vmovdqu		$ACC1, 32*1-128($rp)
+	vpblendd	\$3, $TEMP4, $ZERO, $TEMP4
+	vpaddq		$TEMP3, $ACC3, $ACC3
+	vmovdqu		$ACC2, 32*2-128($rp)
+	vpaddq		$TEMP4, $ACC4, $ACC4
+	vmovdqu		$ACC3, 32*3-128($rp)
+___
+$TEMP5=$ACC0;
+$code.=<<___;
+	vpsrlq		\$29, $ACC4, $TEMP1
+	vpand		$AND_MASK, $ACC4, $ACC4
+	vpsrlq		\$29, $ACC5, $TEMP2
+	vpand		$AND_MASK, $ACC5, $ACC5
+	vpsrlq		\$29, $ACC6, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC6, $ACC6
+	vpsrlq		\$29, $ACC7, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC7, $ACC7
+	vpsrlq		\$29, $ACC8, $TEMP5
+	vpermq		\$0x93, $TEMP3, $TEMP3
+	vpand		$AND_MASK, $ACC8, $ACC8
+	vpermq		\$0x93, $TEMP4, $TEMP4
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP5, $TEMP5
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC4, $ACC4
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC5, $ACC5
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC6, $ACC6
+	vpblendd	\$3, $TEMP4, $TEMP5, $TEMP4
+	vpaddq		$TEMP3, $ACC7, $ACC7
+	vpaddq		$TEMP4, $ACC8, $ACC8
+     
+	vpsrlq		\$29, $ACC4, $TEMP1
+	vpand		$AND_MASK, $ACC4, $ACC4
+	vpsrlq		\$29, $ACC5, $TEMP2
+	vpand		$AND_MASK, $ACC5, $ACC5
+	vpsrlq		\$29, $ACC6, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC6, $ACC6
+	vpsrlq		\$29, $ACC7, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC7, $ACC7
+	vpsrlq		\$29, $ACC8, $TEMP5
+	vpermq		\$0x93, $TEMP3, $TEMP3
+	vpand		$AND_MASK, $ACC8, $ACC8
+	vpermq		\$0x93, $TEMP4, $TEMP4
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP5, $TEMP5
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC4, $ACC4
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC5, $ACC5
+	vmovdqu		$ACC4, 32*4-128($rp)
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC6, $ACC6
+	vmovdqu		$ACC5, 32*5-128($rp)
+	vpblendd	\$3, $TEMP4, $TEMP5, $TEMP4
+	vpaddq		$TEMP3, $ACC7, $ACC7
+	vmovdqu		$ACC6, 32*6-128($rp)
+	vpaddq		$TEMP4, $ACC8, $ACC8
+	vmovdqu		$ACC7, 32*7-128($rp)
+	vmovdqu		$ACC8, 32*8-128($rp)
+
+	mov	$rp, $ap
+	dec	$rep
+	jne	.LOOP_GRANDE_SQR_1024
+
+	vzeroall
+	mov	%rbp, %rax
+___
+$code.=<<___ if ($win64);
+	movaps	-0xd8(%rax),%xmm6
+	movaps	-0xc8(%rax),%xmm7
+	movaps	-0xb8(%rax),%xmm8
+	movaps	-0xa8(%rax),%xmm9
+	movaps	-0x98(%rax),%xmm10
+	movaps	-0x88(%rax),%xmm11
+	movaps	-0x78(%rax),%xmm12
+	movaps	-0x68(%rax),%xmm13
+	movaps	-0x58(%rax),%xmm14
+	movaps	-0x48(%rax),%xmm15
+___
+$code.=<<___;
+	mov	-48(%rax),%r15
+	mov	-40(%rax),%r14
+	mov	-32(%rax),%r13
+	mov	-24(%rax),%r12
+	mov	-16(%rax),%rbp
+	mov	-8(%rax),%rbx
+	lea	(%rax),%rsp		# restore %rsp
+.Lsqr_1024_epilogue:
+	ret
+.size	rsaz_1024_sqr_avx2,.-rsaz_1024_sqr_avx2
+___
+}
+
+{ # void AMM_WW(
+my $rp="%rdi";	# BN_ULONG *rp,
+my $ap="%rsi";	# const BN_ULONG *ap,
+my $bp="%rdx";	# const BN_ULONG *bp,
+my $np="%rcx";	# const BN_ULONG *np,
+my $n0="%r8d";	# unsigned int n0);
+
+# The registers that hold the accumulated redundant result
+# The AMM works on 1024 bit operands, and redundant word size is 29
+# Therefore: ceil(1024/29)/4 = 9
+my $ACC0="%ymm0";
+my $ACC1="%ymm1";
+my $ACC2="%ymm2";
+my $ACC3="%ymm3";
+my $ACC4="%ymm4";
+my $ACC5="%ymm5";
+my $ACC6="%ymm6";
+my $ACC7="%ymm7";
+my $ACC8="%ymm8";
+my $ACC9="%ymm9";
+
+# Registers that hold the broadcasted words of multiplier, currently used
+my $Bi="%ymm10";
+my $Yi="%ymm11";
+
+# Helper registers
+my $TEMP0=$ACC0;
+my $TEMP1="%ymm12";
+my $TEMP2="%ymm13";
+my $ZERO="%ymm14";
+my $AND_MASK="%ymm15";
+
+# alu registers that hold the first words of the ACC
+my $r0="%r9";
+my $r1="%r10";
+my $r2="%r11";
+my $r3="%r12";
+
+my $i="%r14d";
+my $tmp="%r15";
+
+$bp="%r13";	# reassigned argument
+
+$code.=<<___;
+.globl	rsaz_1024_mul_avx2
+.type	rsaz_1024_mul_avx2,\@function,5
+.align	64
+rsaz_1024_mul_avx2:
+	lea	(%rsp), %rax
+	push	%rbx
+	push	%rbp
+	push	%r12
+	push	%r13
+	push	%r14
+	push	%r15
+___
+$code.=<<___ if ($win64);
+	vzeroupper
+	lea	-0xa8(%rsp),%rsp
+	vmovaps	%xmm6,-0xd8(%rax)
+	vmovaps	%xmm7,-0xc8(%rax)
+	vmovaps	%xmm8,-0xb8(%rax)
+	vmovaps	%xmm9,-0xa8(%rax)
+	vmovaps	%xmm10,-0x98(%rax)
+	vmovaps	%xmm11,-0x88(%rax)
+	vmovaps	%xmm12,-0x78(%rax)
+	vmovaps	%xmm13,-0x68(%rax)
+	vmovaps	%xmm14,-0x58(%rax)
+	vmovaps	%xmm15,-0x48(%rax)
+.Lmul_1024_body:
+___
+$code.=<<___;
+	mov	%rax,%rbp
+	vzeroall
+	mov	%rdx, $bp	# reassigned argument
+	sub	\$64,%rsp
+
+	# unaligned 256-bit load that crosses page boundary can
+	# cause severe performance degradation here, so if $ap does
+	# cross page boundary, swap it with $bp [meaning that caller
+	# is advised to lay down $ap and $bp next to each other, so
+	# that only one can cross page boundary].
+	.byte	0x67,0x67
+	mov	$ap, $tmp
+	and	\$4095, $tmp
+	add	\$32*10, $tmp
+	shr	\$12, $tmp
+	mov	$ap, $tmp
+	cmovnz	$bp, $ap
+	cmovnz	$tmp, $bp
+
+	mov	$np, $tmp
+	sub	\$-128,$ap	# size optimization
+	sub	\$-128,$np
+	sub	\$-128,$rp
+
+	and	\$4095, $tmp	# see if $np crosses page
+	add	\$32*10, $tmp
+	.byte	0x67,0x67
+	shr	\$12, $tmp
+	jz	.Lmul_1024_no_n_copy
+
+	# unaligned 256-bit load that crosses page boundary can
+	# cause severe performance degradation here, so if $np does
+	# cross page boundary, copy it to stack and make sure stack
+	# frame doesn't...
+	sub		\$32*10,%rsp
+	vmovdqu		32*0-128($np), $ACC0
+	and		\$-512, %rsp
+	vmovdqu		32*1-128($np), $ACC1
+	vmovdqu		32*2-128($np), $ACC2
+	vmovdqu		32*3-128($np), $ACC3
+	vmovdqu		32*4-128($np), $ACC4
+	vmovdqu		32*5-128($np), $ACC5
+	vmovdqu		32*6-128($np), $ACC6
+	vmovdqu		32*7-128($np), $ACC7
+	vmovdqu		32*8-128($np), $ACC8
+	lea		64+128(%rsp),$np
+	vmovdqu		$ACC0, 32*0-128($np)
+	vpxor		$ACC0, $ACC0, $ACC0
+	vmovdqu		$ACC1, 32*1-128($np)
+	vpxor		$ACC1, $ACC1, $ACC1
+	vmovdqu		$ACC2, 32*2-128($np)
+	vpxor		$ACC2, $ACC2, $ACC2
+	vmovdqu		$ACC3, 32*3-128($np)
+	vpxor		$ACC3, $ACC3, $ACC3
+	vmovdqu		$ACC4, 32*4-128($np)
+	vpxor		$ACC4, $ACC4, $ACC4
+	vmovdqu		$ACC5, 32*5-128($np)
+	vpxor		$ACC5, $ACC5, $ACC5
+	vmovdqu		$ACC6, 32*6-128($np)
+	vpxor		$ACC6, $ACC6, $ACC6
+	vmovdqu		$ACC7, 32*7-128($np)
+	vpxor		$ACC7, $ACC7, $ACC7
+	vmovdqu		$ACC8, 32*8-128($np)
+	vmovdqa		$ACC0, $ACC8
+	vmovdqu		$ACC9, 32*9-128($np)	# $ACC9 is zero after vzeroall
+.Lmul_1024_no_n_copy:
+	and	\$-64,%rsp
+
+	mov	($bp), %rbx
+	vpbroadcastq ($bp), $Bi
+	vmovdqu	$ACC0, (%rsp)			# clear top of stack
+	xor	$r0, $r0
+	.byte	0x67
+	xor	$r1, $r1
+	xor	$r2, $r2
+	xor	$r3, $r3
+
+	vmovdqu	.Land_mask(%rip), $AND_MASK
+	mov	\$9, $i
+	vmovdqu	$ACC9, 32*9-128($rp)		# $ACC9 is zero after vzeroall
+	jmp	.Loop_mul_1024
+
+.align	32
+.Loop_mul_1024:
+	 vpsrlq		\$29, $ACC3, $ACC9		# correct $ACC3(*)
+	mov	%rbx, %rax
+	imulq	-128($ap), %rax
+	add	$r0, %rax
+	mov	%rbx, $r1
+	imulq	8-128($ap), $r1
+	add	8(%rsp), $r1
+
+	mov	%rax, $r0
+	imull	$n0, %eax
+	and	\$0x1fffffff, %eax
+
+	 mov	%rbx, $r2
+	 imulq	16-128($ap), $r2
+	 add	16(%rsp), $r2
+
+	 mov	%rbx, $r3
+	 imulq	24-128($ap), $r3
+	 add	24(%rsp), $r3
+	vpmuludq	32*1-128($ap),$Bi,$TEMP0
+	 vmovd		%eax, $Yi
+	vpaddq		$TEMP0,$ACC1,$ACC1
+	vpmuludq	32*2-128($ap),$Bi,$TEMP1
+	 vpbroadcastq	$Yi, $Yi
+	vpaddq		$TEMP1,$ACC2,$ACC2
+	vpmuludq	32*3-128($ap),$Bi,$TEMP2
+	 vpand		$AND_MASK, $ACC3, $ACC3		# correct $ACC3
+	vpaddq		$TEMP2,$ACC3,$ACC3
+	vpmuludq	32*4-128($ap),$Bi,$TEMP0
+	vpaddq		$TEMP0,$ACC4,$ACC4
+	vpmuludq	32*5-128($ap),$Bi,$TEMP1
+	vpaddq		$TEMP1,$ACC5,$ACC5
+	vpmuludq	32*6-128($ap),$Bi,$TEMP2
+	vpaddq		$TEMP2,$ACC6,$ACC6
+	vpmuludq	32*7-128($ap),$Bi,$TEMP0
+	 vpermq		\$0x93, $ACC9, $ACC9		# correct $ACC3
+	vpaddq		$TEMP0,$ACC7,$ACC7
+	vpmuludq	32*8-128($ap),$Bi,$TEMP1
+	 vpbroadcastq	8($bp), $Bi
+	vpaddq		$TEMP1,$ACC8,$ACC8
+
+	mov	%rax,%rdx
+	imulq	-128($np),%rax
+	add	%rax,$r0
+	mov	%rdx,%rax
+	imulq	8-128($np),%rax
+	add	%rax,$r1
+	mov	%rdx,%rax
+	imulq	16-128($np),%rax
+	add	%rax,$r2
+	shr	\$29, $r0
+	imulq	24-128($np),%rdx
+	add	%rdx,$r3
+	add	$r0, $r1
+
+	vpmuludq	32*1-128($np),$Yi,$TEMP2
+	 vmovq		$Bi, %rbx
+	vpaddq		$TEMP2,$ACC1,$ACC1
+	vpmuludq	32*2-128($np),$Yi,$TEMP0
+	vpaddq		$TEMP0,$ACC2,$ACC2
+	vpmuludq	32*3-128($np),$Yi,$TEMP1
+	vpaddq		$TEMP1,$ACC3,$ACC3
+	vpmuludq	32*4-128($np),$Yi,$TEMP2
+	vpaddq		$TEMP2,$ACC4,$ACC4
+	vpmuludq	32*5-128($np),$Yi,$TEMP0
+	vpaddq		$TEMP0,$ACC5,$ACC5
+	vpmuludq	32*6-128($np),$Yi,$TEMP1
+	vpaddq		$TEMP1,$ACC6,$ACC6
+	vpmuludq	32*7-128($np),$Yi,$TEMP2
+	 vpblendd	\$3, $ZERO, $ACC9, $TEMP1	# correct $ACC3
+	vpaddq		$TEMP2,$ACC7,$ACC7
+	vpmuludq	32*8-128($np),$Yi,$TEMP0
+	 vpaddq		$TEMP1, $ACC3, $ACC3		# correct $ACC3
+	vpaddq		$TEMP0,$ACC8,$ACC8
+
+	mov	%rbx, %rax
+	imulq	-128($ap),%rax
+	add	%rax,$r1
+	 vmovdqu	-8+32*1-128($ap),$TEMP1
+	mov	%rbx, %rax
+	imulq	8-128($ap),%rax
+	add	%rax,$r2
+	 vmovdqu	-8+32*2-128($ap),$TEMP2
+
+	mov	$r1, %rax
+	 vpblendd	\$0xfc, $ZERO, $ACC9, $ACC9	# correct $ACC3
+	imull	$n0, %eax
+	 vpaddq		$ACC9,$ACC4,$ACC4		# correct $ACC3
+	and	\$0x1fffffff, %eax
+
+	 imulq	16-128($ap),%rbx
+	 add	%rbx,$r3
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	 vmovd		%eax, $Yi
+	vmovdqu		-8+32*3-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC1,$ACC1
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	 vpbroadcastq	$Yi, $Yi
+	vmovdqu		-8+32*4-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC2,$ACC2
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-8+32*5-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC3,$ACC3
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vmovdqu		-8+32*6-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC4,$ACC4
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vmovdqu		-8+32*7-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC5,$ACC5
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-8+32*8-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC6,$ACC6
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vmovdqu		-8+32*9-128($ap),$ACC9
+	vpaddq		$TEMP1,$ACC7,$ACC7
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vpaddq		$TEMP2,$ACC8,$ACC8
+	vpmuludq	$Bi,$ACC9,$ACC9
+	 vpbroadcastq	16($bp), $Bi
+
+	mov	%rax,%rdx
+	imulq	-128($np),%rax
+	add	%rax,$r1
+	 vmovdqu	-8+32*1-128($np),$TEMP0
+	mov	%rdx,%rax
+	imulq	8-128($np),%rax
+	add	%rax,$r2
+	 vmovdqu	-8+32*2-128($np),$TEMP1
+	shr	\$29, $r1
+	imulq	16-128($np),%rdx
+	add	%rdx,$r3
+	add	$r1, $r2
+
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	 vmovq		$Bi, %rbx
+	vmovdqu		-8+32*3-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC1,$ACC1
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vmovdqu		-8+32*4-128($np),$TEMP0
+	vpaddq		$TEMP1,$ACC2,$ACC2
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-8+32*5-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC3,$ACC3
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-8+32*6-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC4,$ACC4
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vmovdqu		-8+32*7-128($np),$TEMP0
+	vpaddq		$TEMP1,$ACC5,$ACC5
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-8+32*8-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC6,$ACC6
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-8+32*9-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC7,$ACC7
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vpaddq		$TEMP1,$ACC8,$ACC8
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vpaddq		$TEMP2,$ACC9,$ACC9
+
+	 vmovdqu	-16+32*1-128($ap),$TEMP0
+	mov	%rbx,%rax
+	imulq	-128($ap),%rax
+	add	$r2,%rax
+
+	 vmovdqu	-16+32*2-128($ap),$TEMP1
+	mov	%rax,$r2
+	imull	$n0, %eax
+	and	\$0x1fffffff, %eax
+
+	 imulq	8-128($ap),%rbx
+	 add	%rbx,$r3
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	 vmovd		%eax, $Yi
+	vmovdqu		-16+32*3-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC1,$ACC1
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	 vpbroadcastq	$Yi, $Yi
+	vmovdqu		-16+32*4-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC2,$ACC2
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vmovdqu		-16+32*5-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC3,$ACC3
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-16+32*6-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC4,$ACC4
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vmovdqu		-16+32*7-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC5,$ACC5
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vmovdqu		-16+32*8-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC6,$ACC6
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-16+32*9-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC7,$ACC7
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vpaddq		$TEMP1,$ACC8,$ACC8
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	 vpbroadcastq	24($bp), $Bi
+	vpaddq		$TEMP2,$ACC9,$ACC9
+
+	 vmovdqu	-16+32*1-128($np),$TEMP0
+	mov	%rax,%rdx
+	imulq	-128($np),%rax
+	add	%rax,$r2
+	 vmovdqu	-16+32*2-128($np),$TEMP1
+	imulq	8-128($np),%rdx
+	add	%rdx,$r3
+	shr	\$29, $r2
+
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	 vmovq		$Bi, %rbx
+	vmovdqu		-16+32*3-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC1,$ACC1
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vmovdqu		-16+32*4-128($np),$TEMP0
+	vpaddq		$TEMP1,$ACC2,$ACC2
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-16+32*5-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC3,$ACC3
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-16+32*6-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC4,$ACC4
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vmovdqu		-16+32*7-128($np),$TEMP0
+	vpaddq		$TEMP1,$ACC5,$ACC5
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-16+32*8-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC6,$ACC6
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-16+32*9-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC7,$ACC7
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	 vmovdqu	-24+32*1-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC8,$ACC8
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	 vmovdqu	-24+32*2-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC9,$ACC9
+
+	add	$r2, $r3
+	imulq	-128($ap),%rbx
+	add	%rbx,$r3
+
+	mov	$r3, %rax
+	imull	$n0, %eax
+	and	\$0x1fffffff, %eax
+
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	 vmovd		%eax, $Yi
+	vmovdqu		-24+32*3-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC1,$ACC1
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	 vpbroadcastq	$Yi, $Yi
+	vmovdqu		-24+32*4-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC2,$ACC2
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vmovdqu		-24+32*5-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC3,$ACC3
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-24+32*6-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC4,$ACC4
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vmovdqu		-24+32*7-128($ap),$TEMP0
+	vpaddq		$TEMP1,$ACC5,$ACC5
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	vmovdqu		-24+32*8-128($ap),$TEMP1
+	vpaddq		$TEMP2,$ACC6,$ACC6
+	vpmuludq	$Bi,$TEMP0,$TEMP0
+	vmovdqu		-24+32*9-128($ap),$TEMP2
+	vpaddq		$TEMP0,$ACC7,$ACC7
+	vpmuludq	$Bi,$TEMP1,$TEMP1
+	vpaddq		$TEMP1,$ACC8,$ACC8
+	vpmuludq	$Bi,$TEMP2,$TEMP2
+	 vpbroadcastq	32($bp), $Bi
+	vpaddq		$TEMP2,$ACC9,$ACC9
+	 add		\$32, $bp			# $bp++
+
+	vmovdqu		-24+32*1-128($np),$TEMP0
+	imulq	-128($np),%rax
+	add	%rax,$r3
+	shr	\$29, $r3
+
+	vmovdqu		-24+32*2-128($np),$TEMP1
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	 vmovq		$Bi, %rbx
+	vmovdqu		-24+32*3-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC1,$ACC0		# $ACC0==$TEMP0
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	 vmovdqu	$ACC0, (%rsp)			# transfer $r0-$r3
+	vpaddq		$TEMP1,$ACC2,$ACC1
+	vmovdqu		-24+32*4-128($np),$TEMP0
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-24+32*5-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC3,$ACC2
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-24+32*6-128($np),$TEMP2
+	vpaddq		$TEMP0,$ACC4,$ACC3
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	vmovdqu		-24+32*7-128($np),$TEMP0
+	vpaddq		$TEMP1,$ACC5,$ACC4
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	vmovdqu		-24+32*8-128($np),$TEMP1
+	vpaddq		$TEMP2,$ACC6,$ACC5
+	vpmuludq	$Yi,$TEMP0,$TEMP0
+	vmovdqu		-24+32*9-128($np),$TEMP2
+	 mov	$r3, $r0
+	vpaddq		$TEMP0,$ACC7,$ACC6
+	vpmuludq	$Yi,$TEMP1,$TEMP1
+	 add	(%rsp), $r0
+	vpaddq		$TEMP1,$ACC8,$ACC7
+	vpmuludq	$Yi,$TEMP2,$TEMP2
+	 vmovq	$r3, $TEMP1
+	vpaddq		$TEMP2,$ACC9,$ACC8
+
+	dec	$i
+	jnz	.Loop_mul_1024
+___
+
+# (*)	Original implementation was correcting ACC1-ACC3 for overflow
+#	after 7 loop runs, or after 28 iterations, or 56 additions.
+#	But as we underutilize resources, it's possible to correct in
+#	each iteration with marginal performance loss. But then, as
+#	we do it in each iteration, we can correct less digits, and
+#	avoid performance penalties completely.
+
+$TEMP0 = $ACC9;
+$TEMP3 = $Bi;
+$TEMP4 = $Yi;
+$code.=<<___;
+	vpaddq		(%rsp), $TEMP1, $ACC0
+
+	vpsrlq		\$29, $ACC0, $TEMP1
+	vpand		$AND_MASK, $ACC0, $ACC0
+	vpsrlq		\$29, $ACC1, $TEMP2
+	vpand		$AND_MASK, $ACC1, $ACC1
+	vpsrlq		\$29, $ACC2, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC2, $ACC2
+	vpsrlq		\$29, $ACC3, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC3, $ACC3
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP3, $TEMP3
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpermq		\$0x93, $TEMP4, $TEMP4
+	vpaddq		$TEMP0, $ACC0, $ACC0
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vpblendd	\$3, $TEMP4, $ZERO, $TEMP4
+	vpaddq		$TEMP3, $ACC3, $ACC3
+	vpaddq		$TEMP4, $ACC4, $ACC4
+
+	vpsrlq		\$29, $ACC0, $TEMP1
+	vpand		$AND_MASK, $ACC0, $ACC0
+	vpsrlq		\$29, $ACC1, $TEMP2
+	vpand		$AND_MASK, $ACC1, $ACC1
+	vpsrlq		\$29, $ACC2, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC2, $ACC2
+	vpsrlq		\$29, $ACC3, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC3, $ACC3
+	vpermq		\$0x93, $TEMP3, $TEMP3
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP4, $TEMP4
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC0, $ACC0
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC1, $ACC1
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC2, $ACC2
+	vpblendd	\$3, $TEMP4, $ZERO, $TEMP4
+	vpaddq		$TEMP3, $ACC3, $ACC3
+	vpaddq		$TEMP4, $ACC4, $ACC4
+
+	vmovdqu		$ACC0, 0-128($rp)
+	vmovdqu		$ACC1, 32-128($rp)
+	vmovdqu		$ACC2, 64-128($rp)
+	vmovdqu		$ACC3, 96-128($rp)
+___
+
+$TEMP5=$ACC0;
+$code.=<<___;
+	vpsrlq		\$29, $ACC4, $TEMP1
+	vpand		$AND_MASK, $ACC4, $ACC4
+	vpsrlq		\$29, $ACC5, $TEMP2
+	vpand		$AND_MASK, $ACC5, $ACC5
+	vpsrlq		\$29, $ACC6, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC6, $ACC6
+	vpsrlq		\$29, $ACC7, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC7, $ACC7
+	vpsrlq		\$29, $ACC8, $TEMP5
+	vpermq		\$0x93, $TEMP3, $TEMP3
+	vpand		$AND_MASK, $ACC8, $ACC8
+	vpermq		\$0x93, $TEMP4, $TEMP4
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP5, $TEMP5
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC4, $ACC4
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC5, $ACC5
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC6, $ACC6
+	vpblendd	\$3, $TEMP4, $TEMP5, $TEMP4
+	vpaddq		$TEMP3, $ACC7, $ACC7
+	vpaddq		$TEMP4, $ACC8, $ACC8
+
+	vpsrlq		\$29, $ACC4, $TEMP1
+	vpand		$AND_MASK, $ACC4, $ACC4
+	vpsrlq		\$29, $ACC5, $TEMP2
+	vpand		$AND_MASK, $ACC5, $ACC5
+	vpsrlq		\$29, $ACC6, $TEMP3
+	vpermq		\$0x93, $TEMP1, $TEMP1
+	vpand		$AND_MASK, $ACC6, $ACC6
+	vpsrlq		\$29, $ACC7, $TEMP4
+	vpermq		\$0x93, $TEMP2, $TEMP2
+	vpand		$AND_MASK, $ACC7, $ACC7
+	vpsrlq		\$29, $ACC8, $TEMP5
+	vpermq		\$0x93, $TEMP3, $TEMP3
+	vpand		$AND_MASK, $ACC8, $ACC8
+	vpermq		\$0x93, $TEMP4, $TEMP4
+
+	vpblendd	\$3, $ZERO, $TEMP1, $TEMP0
+	vpermq		\$0x93, $TEMP5, $TEMP5
+	vpblendd	\$3, $TEMP1, $TEMP2, $TEMP1
+	vpaddq		$TEMP0, $ACC4, $ACC4
+	vpblendd	\$3, $TEMP2, $TEMP3, $TEMP2
+	vpaddq		$TEMP1, $ACC5, $ACC5
+	vpblendd	\$3, $TEMP3, $TEMP4, $TEMP3
+	vpaddq		$TEMP2, $ACC6, $ACC6
+	vpblendd	\$3, $TEMP4, $TEMP5, $TEMP4
+	vpaddq		$TEMP3, $ACC7, $ACC7
+	vpaddq		$TEMP4, $ACC8, $ACC8
+
+	vmovdqu		$ACC4, 128-128($rp)
+	vmovdqu		$ACC5, 160-128($rp)    
+	vmovdqu		$ACC6, 192-128($rp)
+	vmovdqu		$ACC7, 224-128($rp)
+	vmovdqu		$ACC8, 256-128($rp)
+	vzeroupper
+
+	mov	%rbp, %rax
+___
+$code.=<<___ if ($win64);
+	movaps	-0xd8(%rax),%xmm6
+	movaps	-0xc8(%rax),%xmm7
+	movaps	-0xb8(%rax),%xmm8
+	movaps	-0xa8(%rax),%xmm9
+	movaps	-0x98(%rax),%xmm10
+	movaps	-0x88(%rax),%xmm11
+	movaps	-0x78(%rax),%xmm12
+	movaps	-0x68(%rax),%xmm13
+	movaps	-0x58(%rax),%xmm14
+	movaps	-0x48(%rax),%xmm15
+___
+$code.=<<___;
+	mov	-48(%rax),%r15
+	mov	-40(%rax),%r14
+	mov	-32(%rax),%r13
+	mov	-24(%rax),%r12
+	mov	-16(%rax),%rbp
+	mov	-8(%rax),%rbx
+	lea	(%rax),%rsp		# restore %rsp
+.Lmul_1024_epilogue:
+	ret
+.size	rsaz_1024_mul_avx2,.-rsaz_1024_mul_avx2
+___
+}
+{
+my ($out,$inp) = $win64 ? ("%rcx","%rdx") : ("%rdi","%rsi");
+my @T = map("%r$_",(8..11));
+
+$code.=<<___;
+.globl	rsaz_1024_red2norm_avx2
+.type	rsaz_1024_red2norm_avx2,\@abi-omnipotent
+.align	32
+rsaz_1024_red2norm_avx2:
+	sub	\$-128,$inp	# size optimization
+	xor	%rax,%rax
+___
+
+for ($j=0,$i=0; $i<16; $i++) {
+    my $k=0;
+    while (29*$j<64*($i+1)) {	# load data till boundary
+	$code.="	mov	`8*$j-128`($inp), @T[0]\n";
+	$j++; $k++; push(@T,shift(@T));
+    }
+    $l=$k;
+    while ($k>1) {		# shift loaded data but last value
+	$code.="	shl	\$`29*($j-$k)`,@T[-$k]\n";
+	$k--;
+    }
+    $code.=<<___;		# shift last value
+	mov	@T[-1], @T[0]
+	shl	\$`29*($j-1)`, @T[-1]
+	shr	\$`-29*($j-1)`, @T[0]
+___
+    while ($l) {		# accumulate all values
+	$code.="	add	@T[-$l], %rax\n";
+	$l--;
+    }
+	$code.=<<___;
+	adc	\$0, @T[0]	# consume eventual carry
+	mov	%rax, 8*$i($out)
+	mov	@T[0], %rax
+___
+    push(@T,shift(@T));
+}
+$code.=<<___;
+	ret
+.size	rsaz_1024_red2norm_avx2,.-rsaz_1024_red2norm_avx2
+
+.globl	rsaz_1024_norm2red_avx2
+.type	rsaz_1024_norm2red_avx2,\@abi-omnipotent
+.align	32
+rsaz_1024_norm2red_avx2:
+	sub	\$-128,$out	# size optimization
+	mov	($inp),@T[0]
+	mov	\$0x1fffffff,%eax
+___
+for ($j=0,$i=0; $i<16; $i++) {
+    $code.="	mov	`8*($i+1)`($inp),@T[1]\n"	if ($i<15);
+    $code.="	xor	@T[1],@T[1]\n"			if ($i==15);
+    my $k=1;
+    while (29*($j+1)<64*($i+1)) {
+    	$code.=<<___;
+	mov	@T[0],@T[-$k]
+	shr	\$`29*$j`,@T[-$k]
+	and	%rax,@T[-$k]				# &0x1fffffff
+	mov	@T[-$k],`8*$j-128`($out)
+___
+	$j++; $k++;
+    }
+    $code.=<<___;
+	shrd	\$`29*$j`,@T[1],@T[0]
+	and	%rax,@T[0]
+	mov	@T[0],`8*$j-128`($out)
+___
+    $j++;
+    push(@T,shift(@T));
+}
+$code.=<<___;
+	mov	@T[0],`8*$j-128`($out)			# zero
+	mov	@T[0],`8*($j+1)-128`($out)
+	mov	@T[0],`8*($j+2)-128`($out)
+	mov	@T[0],`8*($j+3)-128`($out)
+	ret
+.size	rsaz_1024_norm2red_avx2,.-rsaz_1024_norm2red_avx2
+___
+}
+{
+my ($out,$inp,$power) = $win64 ? ("%rcx","%rdx","%r8d") : ("%rdi","%rsi","%edx");
+
+$code.=<<___;
+.globl	rsaz_1024_scatter5_avx2
+.type	rsaz_1024_scatter5_avx2,\@abi-omnipotent
+.align	32
+rsaz_1024_scatter5_avx2:
+	vzeroupper
+	vmovdqu	.Lscatter_permd(%rip),%ymm5
+	shl	\$4,$power
+	lea	($out,$power),$out
+	mov	\$9,%eax
+	jmp	.Loop_scatter_1024
+
+.align	32
+.Loop_scatter_1024:
+	vmovdqu		($inp),%ymm0
+	lea		32($inp),$inp
+	vpermd		%ymm0,%ymm5,%ymm0
+	vmovdqu		%xmm0,($out)
+	lea		16*32($out),$out
+	dec	%eax
+	jnz	.Loop_scatter_1024
+
+	vzeroupper
+	ret
+.size	rsaz_1024_scatter5_avx2,.-rsaz_1024_scatter5_avx2
+
+.globl	rsaz_1024_gather5_avx2
+.type	rsaz_1024_gather5_avx2,\@abi-omnipotent
+.align	32
+rsaz_1024_gather5_avx2:
+	vzeroupper
+	mov	%rsp,%r11
+___
+$code.=<<___ if ($win64);
+	lea	-0x88(%rsp),%rax
+.LSEH_begin_rsaz_1024_gather5:
+	# I can't trust assembler to use specific encoding:-(
+	.byte	0x48,0x8d,0x60,0xe0		# lea	-0x20(%rax),%rsp
+	.byte	0xc5,0xf8,0x29,0x70,0xe0	# vmovaps %xmm6,-0x20(%rax)
+	.byte	0xc5,0xf8,0x29,0x78,0xf0	# vmovaps %xmm7,-0x10(%rax)
+	.byte	0xc5,0x78,0x29,0x40,0x00	# vmovaps %xmm8,0(%rax)
+	.byte	0xc5,0x78,0x29,0x48,0x10	# vmovaps %xmm9,0x10(%rax)
+	.byte	0xc5,0x78,0x29,0x50,0x20	# vmovaps %xmm10,0x20(%rax)
+	.byte	0xc5,0x78,0x29,0x58,0x30	# vmovaps %xmm11,0x30(%rax)
+	.byte	0xc5,0x78,0x29,0x60,0x40	# vmovaps %xmm12,0x40(%rax)
+	.byte	0xc5,0x78,0x29,0x68,0x50	# vmovaps %xmm13,0x50(%rax)
+	.byte	0xc5,0x78,0x29,0x70,0x60	# vmovaps %xmm14,0x60(%rax)
+	.byte	0xc5,0x78,0x29,0x78,0x70	# vmovaps %xmm15,0x70(%rax)
+___
+$code.=<<___;
+	lea	-0x100(%rsp),%rsp
+	and	\$-32, %rsp
+	lea	.Linc(%rip), %r10
+	lea	-128(%rsp),%rax			# control u-op density
+
+	vmovd		$power, %xmm4
+	vmovdqa		(%r10),%ymm0
+	vmovdqa		32(%r10),%ymm1
+	vmovdqa		64(%r10),%ymm5
+	vpbroadcastd	%xmm4,%ymm4
+
+	vpaddd		%ymm5, %ymm0, %ymm2
+	vpcmpeqd	%ymm4, %ymm0, %ymm0
+	vpaddd		%ymm5, %ymm1, %ymm3
+	vpcmpeqd	%ymm4, %ymm1, %ymm1
+	vmovdqa		%ymm0, 32*0+128(%rax)
+	vpaddd		%ymm5, %ymm2, %ymm0
+	vpcmpeqd	%ymm4, %ymm2, %ymm2
+	vmovdqa		%ymm1, 32*1+128(%rax)
+	vpaddd		%ymm5, %ymm3, %ymm1
+	vpcmpeqd	%ymm4, %ymm3, %ymm3
+	vmovdqa		%ymm2, 32*2+128(%rax)
+	vpaddd		%ymm5, %ymm0, %ymm2
+	vpcmpeqd	%ymm4, %ymm0, %ymm0
+	vmovdqa		%ymm3, 32*3+128(%rax)
+	vpaddd		%ymm5, %ymm1, %ymm3
+	vpcmpeqd	%ymm4, %ymm1, %ymm1
+	vmovdqa		%ymm0, 32*4+128(%rax)
+	vpaddd		%ymm5, %ymm2, %ymm8
+	vpcmpeqd	%ymm4, %ymm2, %ymm2
+	vmovdqa		%ymm1, 32*5+128(%rax)
+	vpaddd		%ymm5, %ymm3, %ymm9
+	vpcmpeqd	%ymm4, %ymm3, %ymm3
+	vmovdqa		%ymm2, 32*6+128(%rax)
+	vpaddd		%ymm5, %ymm8, %ymm10
+	vpcmpeqd	%ymm4, %ymm8, %ymm8
+	vmovdqa		%ymm3, 32*7+128(%rax)
+	vpaddd		%ymm5, %ymm9, %ymm11
+	vpcmpeqd	%ymm4, %ymm9, %ymm9
+	vpaddd		%ymm5, %ymm10, %ymm12
+	vpcmpeqd	%ymm4, %ymm10, %ymm10
+	vpaddd		%ymm5, %ymm11, %ymm13
+	vpcmpeqd	%ymm4, %ymm11, %ymm11
+	vpaddd		%ymm5, %ymm12, %ymm14
+	vpcmpeqd	%ymm4, %ymm12, %ymm12
+	vpaddd		%ymm5, %ymm13, %ymm15
+	vpcmpeqd	%ymm4, %ymm13, %ymm13
+	vpcmpeqd	%ymm4, %ymm14, %ymm14
+	vpcmpeqd	%ymm4, %ymm15, %ymm15
+
+	vmovdqa	-32(%r10),%ymm7			# .Lgather_permd
+	lea	128($inp), $inp
+	mov	\$9,$power
+
+.Loop_gather_1024:
+	vmovdqa		32*0-128($inp),	%ymm0
+	vmovdqa		32*1-128($inp),	%ymm1
+	vmovdqa		32*2-128($inp),	%ymm2
+	vmovdqa		32*3-128($inp),	%ymm3
+	vpand		32*0+128(%rax),	%ymm0,	%ymm0
+	vpand		32*1+128(%rax),	%ymm1,	%ymm1
+	vpand		32*2+128(%rax),	%ymm2,	%ymm2
+	vpor		%ymm0, %ymm1, %ymm4
+	vpand		32*3+128(%rax),	%ymm3,	%ymm3
+	vmovdqa		32*4-128($inp),	%ymm0
+	vmovdqa		32*5-128($inp),	%ymm1
+	vpor		%ymm2, %ymm3, %ymm5
+	vmovdqa		32*6-128($inp),	%ymm2
+	vmovdqa		32*7-128($inp),	%ymm3
+	vpand		32*4+128(%rax),	%ymm0,	%ymm0
+	vpand		32*5+128(%rax),	%ymm1,	%ymm1
+	vpand		32*6+128(%rax),	%ymm2,	%ymm2
+	vpor		%ymm0, %ymm4, %ymm4
+	vpand		32*7+128(%rax),	%ymm3,	%ymm3
+	vpand		32*8-128($inp),	%ymm8,	%ymm0
+	vpor		%ymm1, %ymm5, %ymm5
+	vpand		32*9-128($inp),	%ymm9,	%ymm1
+	vpor		%ymm2, %ymm4, %ymm4
+	vpand		32*10-128($inp),%ymm10,	%ymm2
+	vpor		%ymm3, %ymm5, %ymm5
+	vpand		32*11-128($inp),%ymm11,	%ymm3
+	vpor		%ymm0, %ymm4, %ymm4
+	vpand		32*12-128($inp),%ymm12,	%ymm0
+	vpor		%ymm1, %ymm5, %ymm5
+	vpand		32*13-128($inp),%ymm13,	%ymm1
+	vpor		%ymm2, %ymm4, %ymm4
+	vpand		32*14-128($inp),%ymm14,	%ymm2
+	vpor		%ymm3, %ymm5, %ymm5
+	vpand		32*15-128($inp),%ymm15,	%ymm3
+	lea		32*16($inp), $inp
+	vpor		%ymm0, %ymm4, %ymm4
+	vpor		%ymm1, %ymm5, %ymm5
+	vpor		%ymm2, %ymm4, %ymm4
+	vpor		%ymm3, %ymm5, %ymm5
+
+	vpor		%ymm5, %ymm4, %ymm4
+	vextracti128	\$1, %ymm4, %xmm5	# upper half is cleared
+	vpor		%xmm4, %xmm5, %xmm5
+	vpermd		%ymm5,%ymm7,%ymm5
+	vmovdqu		%ymm5,($out)
+	lea		32($out),$out
+	dec	$power
+	jnz	.Loop_gather_1024
+
+	vpxor	%ymm0,%ymm0,%ymm0
+	vmovdqu	%ymm0,($out)
+	vzeroupper
+___
+$code.=<<___ if ($win64);
+	movaps	-0xa8(%r11),%xmm6
+	movaps	-0x98(%r11),%xmm7
+	movaps	-0x88(%r11),%xmm8
+	movaps	-0x78(%r11),%xmm9
+	movaps	-0x68(%r11),%xmm10
+	movaps	-0x58(%r11),%xmm11
+	movaps	-0x48(%r11),%xmm12
+	movaps	-0x38(%r11),%xmm13
+	movaps	-0x28(%r11),%xmm14
+	movaps	-0x18(%r11),%xmm15
+.LSEH_end_rsaz_1024_gather5:
+___
+$code.=<<___;
+	lea	(%r11),%rsp
+	ret
+.size	rsaz_1024_gather5_avx2,.-rsaz_1024_gather5_avx2
+___
+}
+
+$code.=<<___;
+.extern	OPENSSL_ia32cap_P
+.globl	rsaz_avx2_eligible
+.type	rsaz_avx2_eligible,\@abi-omnipotent
+.align	32
+rsaz_avx2_eligible:
+	mov	OPENSSL_ia32cap_P+8(%rip),%eax
+___
+$code.=<<___	if ($addx);
+	mov	\$`1<<8|1<<19`,%ecx
+	mov	\$0,%edx
+	and	%eax,%ecx
+	cmp	\$`1<<8|1<<19`,%ecx	# check for BMI2+AD*X
+	cmove	%edx,%eax
+___
+$code.=<<___;
+	and	\$`1<<5`,%eax
+	shr	\$5,%eax
+	ret
+.size	rsaz_avx2_eligible,.-rsaz_avx2_eligible
+
+.align	64
+.Land_mask:
+	.quad	0x1fffffff,0x1fffffff,0x1fffffff,0x1fffffff
+.Lscatter_permd:
+	.long	0,2,4,6,7,7,7,7
+.Lgather_permd:
+	.long	0,7,1,7,2,7,3,7
+.Linc:
+	.long	0,0,0,0, 1,1,1,1
+	.long	2,2,2,2, 3,3,3,3
+	.long	4,4,4,4, 4,4,4,4
+.align	64
+___
+
+if ($win64) {
+$rec="%rcx";
+$frame="%rdx";
+$context="%r8";
+$disp="%r9";
+
+$code.=<<___
+.extern	__imp_RtlVirtualUnwind
+.type	rsaz_se_handler,\@abi-omnipotent
+.align	16
+rsaz_se_handler:
+	push	%rsi
+	push	%rdi
+	push	%rbx
+	push	%rbp
+	push	%r12
+	push	%r13
+	push	%r14
+	push	%r15
+	pushfq
+	sub	\$64,%rsp
+
+	mov	120($context),%rax	# pull context->Rax
+	mov	248($context),%rbx	# pull context->Rip
+
+	mov	8($disp),%rsi		# disp->ImageBase
+	mov	56($disp),%r11		# disp->HandlerData
+
+	mov	0(%r11),%r10d		# HandlerData[0]
+	lea	(%rsi,%r10),%r10	# prologue label
+	cmp	%r10,%rbx		# context->Rip<prologue label
+	jb	.Lcommon_seh_tail
+
+	mov	152($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	160($context),%rax	# pull context->Rbp
+
+	mov	-48(%rax),%r15
+	mov	-40(%rax),%r14
+	mov	-32(%rax),%r13
+	mov	-24(%rax),%r12
+	mov	-16(%rax),%rbp
+	mov	-8(%rax),%rbx
+	mov	%r15,240($context)
+	mov	%r14,232($context)
+	mov	%r13,224($context)
+	mov	%r12,216($context)
+	mov	%rbp,160($context)
+	mov	%rbx,144($context)
+
+	lea	-0xd8(%rax),%rsi	# %xmm save area
+	lea	512($context),%rdi	# & context.Xmm6
+	mov	\$20,%ecx		# 10*sizeof(%xmm0)/sizeof(%rax)
+	.long	0xa548f3fc		# cld; rep movsq
+
+.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	rsaz_se_handler,.-rsaz_se_handler
+
+.section	.pdata
+.align	4
+	.rva	.LSEH_begin_rsaz_1024_sqr_avx2
+	.rva	.LSEH_end_rsaz_1024_sqr_avx2
+	.rva	.LSEH_info_rsaz_1024_sqr_avx2
+
+	.rva	.LSEH_begin_rsaz_1024_mul_avx2
+	.rva	.LSEH_end_rsaz_1024_mul_avx2
+	.rva	.LSEH_info_rsaz_1024_mul_avx2
+
+	.rva	.LSEH_begin_rsaz_1024_gather5
+	.rva	.LSEH_end_rsaz_1024_gather5
+	.rva	.LSEH_info_rsaz_1024_gather5
+.section	.xdata
+.align	8
+.LSEH_info_rsaz_1024_sqr_avx2:
+	.byte	9,0,0,0
+	.rva	rsaz_se_handler
+	.rva	.Lsqr_1024_body,.Lsqr_1024_epilogue
+.LSEH_info_rsaz_1024_mul_avx2:
+	.byte	9,0,0,0
+	.rva	rsaz_se_handler
+	.rva	.Lmul_1024_body,.Lmul_1024_epilogue
+.LSEH_info_rsaz_1024_gather5:
+	.byte	0x01,0x36,0x17,0x0b
+	.byte	0x36,0xf8,0x09,0x00	# vmovaps 0x90(rsp),xmm15
+	.byte	0x31,0xe8,0x08,0x00	# vmovaps 0x80(rsp),xmm14
+	.byte	0x2c,0xd8,0x07,0x00	# vmovaps 0x70(rsp),xmm13
+	.byte	0x27,0xc8,0x06,0x00	# vmovaps 0x60(rsp),xmm12
+	.byte	0x22,0xb8,0x05,0x00	# vmovaps 0x50(rsp),xmm11
+	.byte	0x1d,0xa8,0x04,0x00	# vmovaps 0x40(rsp),xmm10
+	.byte	0x18,0x98,0x03,0x00	# vmovaps 0x30(rsp),xmm9
+	.byte	0x13,0x88,0x02,0x00	# vmovaps 0x20(rsp),xmm8
+	.byte	0x0e,0x78,0x01,0x00	# vmovaps 0x10(rsp),xmm7
+	.byte	0x09,0x68,0x00,0x00	# vmovaps 0x00(rsp),xmm6
+	.byte	0x04,0x01,0x15,0x00	# sub	  rsp,0xa8
+	.byte	0x00,0xb3,0x00,0x00	# set_frame r11
+___
+}
+
+foreach (split("\n",$code)) {
+	s/\`([^\`]*)\`/eval($1)/ge;
+
+	s/\b(sh[rl]d?\s+\$)(-?[0-9]+)/$1.$2%64/ge		or
+
+	s/\b(vmov[dq])\b(.+)%ymm([0-9]+)/$1$2%xmm$3/go		or
+	s/\b(vmovdqu)\b(.+)%x%ymm([0-9]+)/$1$2%xmm$3/go		or
+	s/\b(vpinsr[qd])\b(.+)%ymm([0-9]+)/$1$2%xmm$3/go	or
+	s/\b(vpextr[qd])\b(.+)%ymm([0-9]+)/$1$2%xmm$3/go	or
+	s/\b(vpbroadcast[qd]\s+)%ymm([0-9]+)/$1%xmm$2/go;
+	print $_,"\n";
+}
+
+}}} else {{{
+print <<___;	# assembler is too old
+.text
+
+.globl	rsaz_avx2_eligible
+.type	rsaz_avx2_eligible,\@abi-omnipotent
+rsaz_avx2_eligible:
+	xor	%eax,%eax
+	ret
+.size	rsaz_avx2_eligible,.-rsaz_avx2_eligible
+
+.globl	rsaz_1024_sqr_avx2
+.globl	rsaz_1024_mul_avx2
+.globl	rsaz_1024_norm2red_avx2
+.globl	rsaz_1024_red2norm_avx2
+.globl	rsaz_1024_scatter5_avx2
+.globl	rsaz_1024_gather5_avx2
+.type	rsaz_1024_sqr_avx2,\@abi-omnipotent
+rsaz_1024_sqr_avx2:
+rsaz_1024_mul_avx2:
+rsaz_1024_norm2red_avx2:
+rsaz_1024_red2norm_avx2:
+rsaz_1024_scatter5_avx2:
+rsaz_1024_gather5_avx2:
+	.byte	0x0f,0x0b	# ud2
+	ret
+.size	rsaz_1024_sqr_avx2,.-rsaz_1024_sqr_avx2
+___
+}}}
+
+close STDOUT;
-- 
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