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openssl/crypto/bn/asm/x86_64-mont.pl
Richard Levitte 1aa89a7a3a Unify all assembler file generators 
They now generally conform to the following argument sequence:

    script.pl "$(PERLASM_SCHEME)" [ C preprocessor arguments ... ] \
              $(PROCESSOR) <output file>

However, in the spirit of being able to use these scripts manually,
they also allow for no argument, or for only the flavour, or for only
the output file.  This is done by only using the last argument as
output file if it's a file (it has an extension), and only using the
first argument as flavour if it isn't a file (it doesn't have an
extension).

While we're at it, we make all $xlate calls the same, i.e. the $output
argument is always quoted, and we always die on error when trying to
start $xlate.

There's a perl lesson in this, regarding operator priority...

This will always succeed, even when it fails:

    open FOO, "something" || die "ERR: $!";

The reason is that '||' has higher priority than list operators (a
function is essentially a list operator and gobbles up everything
following it that isn't lower priority), and since a non-empty string
is always true, so that ends up being exactly the same as:

    open FOO, "something";

This, however, will fail if "something" can't be opened:

    open FOO, "something" or die "ERR: $!";

The reason is that 'or' has lower priority that list operators,
i.e. it's performed after the 'open' call.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9884)
2019-09-16 16:29:57 +02:00

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#! /usr/bin/env perl
# Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (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
# ====================================================================
# 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.
# June 2013.
#
# Optimize reduction in squaring procedure and improve 1024+-bit RSA
# sign performance by 10-16% on Intel Sandy Bridge and later
# (virtually same on non-Intel processors).
# August 2013.
#
# Add MULX/ADOX/ADCX code path.
# $output is the last argument if it looks like a file (it has an extension)
# $flavour is the first argument if it doesn't look like a file
$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
$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\""
or die "can't call $xlate: $!";
*STDOUT=*OUT;
if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
=~ /GNU assembler version ([2-9]\.[0-9]+)/) {
$addx = ($1>=2.23);
}
if (!$addx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
`nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
$addx = ($1>=2.10);
}
if (!$addx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
`ml64 2>&1` =~ /Version ([0-9]+)\./) {
$addx = ($1>=12);
}
if (!$addx && `$ENV{CC} -v 2>&1` =~ /((?:^clang|LLVM) version|.*based on LLVM) ([3-9])\.([0-9]+)/) {
my $ver = $2 + $3/100.0; # 3.1->3.01, 3.10->3.10
$addx = ($ver>=3.03);
}
# 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
.extern OPENSSL_ia32cap_P
.globl bn_mul_mont
.type bn_mul_mont,\@function,6
.align 16
bn_mul_mont:
.cfi_startproc
mov ${num}d,${num}d
mov %rsp,%rax
.cfi_def_cfa_register %rax
test \$3,${num}d
jnz .Lmul_enter
cmp \$8,${num}d
jb .Lmul_enter
___
$code.=<<___ if ($addx);
mov OPENSSL_ia32cap_P+8(%rip),%r11d
___
$code.=<<___;
cmp $ap,$bp
jne .Lmul4x_enter
test \$7,${num}d
jz .Lsqr8x_enter
jmp .Lmul4x_enter
.align 16
.Lmul_enter:
push %rbx
.cfi_push %rbx
push %rbp
.cfi_push %rbp
push %r12
.cfi_push %r12
push %r13
.cfi_push %r13
push %r14
.cfi_push %r14
push %r15
.cfi_push %r15
neg $num
mov %rsp,%r11
lea -16(%rsp,$num,8),%r10 # future alloca(8*(num+2))
neg $num # restore $num
and \$-1024,%r10 # minimize TLB usage
# An OS-agnostic version of __chkstk.
#
# Some OSes (Windows) insist on stack being "wired" to
# physical memory in strictly sequential manner, i.e. if stack
# allocation spans two pages, then reference to farmost one can
# be punishable by SEGV. But page walking can do good even on
# other OSes, because it guarantees that villain thread hits
# the guard page before it can make damage to innocent one...
sub %r10,%r11
and \$-4096,%r11
lea (%r10,%r11),%rsp
mov (%rsp),%r11
cmp %r10,%rsp
ja .Lmul_page_walk
jmp .Lmul_page_walk_done
.align 16
.Lmul_page_walk:
lea -4096(%rsp),%rsp
mov (%rsp),%r11
cmp %r10,%rsp
ja .Lmul_page_walk
.Lmul_page_walk_done:
mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp
.cfi_cfa_expression %rsp+8,$num,8,mul,plus,deref,+8
.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
jb .Louter
xor $i,$i # i=0 and clear CF!
mov (%rsp),%rax # tp[0]
mov $num,$j # j=num
.align 16
.Lsub: sbb ($np,$i,8),%rax
mov %rax,($rp,$i,8) # rp[i]=tp[i]-np[i]
mov 8(%rsp,$i,8),%rax # tp[i+1]
lea 1($i),$i # i++
dec $j # doesn't affect CF!
jnz .Lsub
sbb \$0,%rax # handle upmost overflow bit
mov \$-1,%rbx
xor %rax,%rbx # not %rax
xor $i,$i
mov $num,$j # j=num
.Lcopy: # conditional copy
mov ($rp,$i,8),%rcx
mov (%rsp,$i,8),%rdx
and %rbx,%rcx
and %rax,%rdx
mov $num,(%rsp,$i,8) # zap temporary vector
or %rcx,%rdx
mov %rdx,($rp,$i,8) # rp[i]=tp[i]
lea 1($i),$i
sub \$1,$j
jnz .Lcopy
mov 8(%rsp,$num,8),%rsi # restore %rsp
.cfi_def_cfa %rsi,8
mov \$1,%rax
mov -48(%rsi),%r15
.cfi_restore %r15
mov -40(%rsi),%r14
.cfi_restore %r14
mov -32(%rsi),%r13
.cfi_restore %r13
mov -24(%rsi),%r12
.cfi_restore %r12
mov -16(%rsi),%rbp
.cfi_restore %rbp
mov -8(%rsi),%rbx
.cfi_restore %rbx
lea (%rsi),%rsp
.cfi_def_cfa_register %rsp
.Lmul_epilogue:
ret
.cfi_endproc
.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:
.cfi_startproc
mov ${num}d,${num}d
mov %rsp,%rax
.cfi_def_cfa_register %rax
.Lmul4x_enter:
___
$code.=<<___ if ($addx);
and \$0x80100,%r11d
cmp \$0x80100,%r11d
je .Lmulx4x_enter
___
$code.=<<___;
push %rbx
.cfi_push %rbx
push %rbp
.cfi_push %rbp
push %r12
.cfi_push %r12
push %r13
.cfi_push %r13
push %r14
.cfi_push %r14
push %r15
.cfi_push %r15
neg $num
mov %rsp,%r11
lea -32(%rsp,$num,8),%r10 # future alloca(8*(num+4))
neg $num # restore
and \$-1024,%r10 # minimize TLB usage
sub %r10,%r11
and \$-4096,%r11
lea (%r10,%r11),%rsp
mov (%rsp),%r11
cmp %r10,%rsp
ja .Lmul4x_page_walk
jmp .Lmul4x_page_walk_done
.Lmul4x_page_walk:
lea -4096(%rsp),%rsp
mov (%rsp),%r11
cmp %r10,%rsp
ja .Lmul4x_page_walk
.Lmul4x_page_walk_done:
mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp
.cfi_cfa_expression %rsp+8,$num,8,mul,plus,deref,+8
.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
jb .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
jb .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
jb .Louter4x
___
{
my @ri=("%rax","%rdx",$m0,$m1);
$code.=<<___;
mov 16(%rsp,$num,8),$rp # restore $rp
lea -4($num),$j
mov 0(%rsp),@ri[0] # tp[0]
mov 8(%rsp),@ri[1] # tp[1]
shr \$2,$j # j=num/4-1
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]
.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 $j # doesn't affect CF!
jnz .Lsub4x
mov @ri[0],0($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]
pxor %xmm0,%xmm0
movq @ri[0],%xmm4
pcmpeqd %xmm5,%xmm5
pshufd \$0,%xmm4,%xmm4
mov $num,$j
pxor %xmm4,%xmm5
shr \$2,$j # j=num/4
xor %eax,%eax # i=0
jmp .Lcopy4x
.align 16
.Lcopy4x: # conditional copy
movdqa (%rsp,%rax),%xmm1
movdqu ($rp,%rax),%xmm2
pand %xmm4,%xmm1
pand %xmm5,%xmm2
movdqa 16(%rsp,%rax),%xmm3
movdqa %xmm0,(%rsp,%rax)
por %xmm2,%xmm1
movdqu 16($rp,%rax),%xmm2
movdqu %xmm1,($rp,%rax)
pand %xmm4,%xmm3
pand %xmm5,%xmm2
movdqa %xmm0,16(%rsp,%rax)
por %xmm2,%xmm3
movdqu %xmm3,16($rp,%rax)
lea 32(%rax),%rax
dec $j
jnz .Lcopy4x
___
}
$code.=<<___;
mov 8(%rsp,$num,8),%rsi # restore %rsp
.cfi_def_cfa %rsi, 8
mov \$1,%rax
mov -48(%rsi),%r15
.cfi_restore %r15
mov -40(%rsi),%r14
.cfi_restore %r14
mov -32(%rsi),%r13
.cfi_restore %r13
mov -24(%rsi),%r12
.cfi_restore %r12
mov -16(%rsi),%rbp
.cfi_restore %rbp
mov -8(%rsi),%rbx
.cfi_restore %rbx
lea (%rsi),%rsp
.cfi_def_cfa_register %rsp
.Lmul4x_epilogue:
ret
.cfi_endproc
.size bn_mul4x_mont,.-bn_mul4x_mont
___
}}}
{{{
######################################################################
# void bn_sqr8x_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 $num ="%r9"; # int num, has to be divisible by 8
my ($i,$j,$tptr)=("%rbp","%rcx",$rptr);
my @A0=("%r10","%r11");
my @A1=("%r12","%r13");
my ($a0,$a1,$ai)=("%r14","%r15","%rbx");
$code.=<<___ if ($addx);
.extern bn_sqrx8x_internal # see x86_64-mont5 module
___
$code.=<<___;
.extern bn_sqr8x_internal # see x86_64-mont5 module
.type bn_sqr8x_mont,\@function,6
.align 32
bn_sqr8x_mont:
.cfi_startproc
mov %rsp,%rax
.cfi_def_cfa_register %rax
.Lsqr8x_enter:
push %rbx
.cfi_push %rbx
push %rbp
.cfi_push %rbp
push %r12
.cfi_push %r12
push %r13
.cfi_push %r13
push %r14
.cfi_push %r14
push %r15
.cfi_push %r15
.Lsqr8x_prologue:
mov ${num}d,%r10d
shl \$3,${num}d # convert $num to bytes
shl \$3+2,%r10 # 4*$num
neg $num
##############################################################
# ensure that stack frame doesn't alias with $aptr modulo
# 4096. this is done to allow memory disambiguation logic
# do its job.
#
lea -64(%rsp,$num,2),%r11
mov %rsp,%rbp
mov ($n0),$n0 # *n0
sub $aptr,%r11
and \$4095,%r11
cmp %r11,%r10
jb .Lsqr8x_sp_alt
sub %r11,%rbp # align with $aptr
lea -64(%rbp,$num,2),%rbp # future alloca(frame+2*$num)
jmp .Lsqr8x_sp_done
.align 32
.Lsqr8x_sp_alt:
lea 4096-64(,$num,2),%r10 # 4096-frame-2*$num
lea -64(%rbp,$num,2),%rbp # future alloca(frame+2*$num)
sub %r10,%r11
mov \$0,%r10
cmovc %r10,%r11
sub %r11,%rbp
.Lsqr8x_sp_done:
and \$-64,%rbp
mov %rsp,%r11
sub %rbp,%r11
and \$-4096,%r11
lea (%rbp,%r11),%rsp
mov (%rsp),%r10
cmp %rbp,%rsp
ja .Lsqr8x_page_walk
jmp .Lsqr8x_page_walk_done
.align 16
.Lsqr8x_page_walk:
lea -4096(%rsp),%rsp
mov (%rsp),%r10
cmp %rbp,%rsp
ja .Lsqr8x_page_walk
.Lsqr8x_page_walk_done:
mov $num,%r10
neg $num
mov $n0, 32(%rsp)
mov %rax, 40(%rsp) # save original %rsp
.cfi_cfa_expression %rsp+40,deref,+8
.Lsqr8x_body:
movq $nptr, %xmm2 # save pointer to modulus
pxor %xmm0,%xmm0
movq $rptr,%xmm1 # save $rptr
movq %r10, %xmm3 # -$num
___
$code.=<<___ if ($addx);
mov OPENSSL_ia32cap_P+8(%rip),%eax
and \$0x80100,%eax
cmp \$0x80100,%eax
jne .Lsqr8x_nox
call bn_sqrx8x_internal # see x86_64-mont5 module
# %rax top-most carry
# %rbp nptr
# %rcx -8*num
# %r8 end of tp[2*num]
lea (%r8,%rcx),%rbx
mov %rcx,$num
mov %rcx,%rdx
movq %xmm1,$rptr
sar \$3+2,%rcx # %cf=0
jmp .Lsqr8x_sub
.align 32
.Lsqr8x_nox:
___
$code.=<<___;
call bn_sqr8x_internal # see x86_64-mont5 module
# %rax top-most carry
# %rbp nptr
# %r8 -8*num
# %rdi end of tp[2*num]
lea (%rdi,$num),%rbx
mov $num,%rcx
mov $num,%rdx
movq %xmm1,$rptr
sar \$3+2,%rcx # %cf=0
jmp .Lsqr8x_sub
.align 32
.Lsqr8x_sub:
mov 8*0(%rbx),%r12
mov 8*1(%rbx),%r13
mov 8*2(%rbx),%r14
mov 8*3(%rbx),%r15
lea 8*4(%rbx),%rbx
sbb 8*0(%rbp),%r12
sbb 8*1(%rbp),%r13
sbb 8*2(%rbp),%r14
sbb 8*3(%rbp),%r15
lea 8*4(%rbp),%rbp
mov %r12,8*0($rptr)
mov %r13,8*1($rptr)
mov %r14,8*2($rptr)
mov %r15,8*3($rptr)
lea 8*4($rptr),$rptr
inc %rcx # preserves %cf
jnz .Lsqr8x_sub
sbb \$0,%rax # top-most carry
lea (%rbx,$num),%rbx # rewind
lea ($rptr,$num),$rptr # rewind
movq %rax,%xmm1
pxor %xmm0,%xmm0
pshufd \$0,%xmm1,%xmm1
mov 40(%rsp),%rsi # restore %rsp
.cfi_def_cfa %rsi,8
jmp .Lsqr8x_cond_copy
.align 32
.Lsqr8x_cond_copy:
movdqa 16*0(%rbx),%xmm2
movdqa 16*1(%rbx),%xmm3
lea 16*2(%rbx),%rbx
movdqu 16*0($rptr),%xmm4
movdqu 16*1($rptr),%xmm5
lea 16*2($rptr),$rptr
movdqa %xmm0,-16*2(%rbx) # zero tp
movdqa %xmm0,-16*1(%rbx)
movdqa %xmm0,-16*2(%rbx,%rdx)
movdqa %xmm0,-16*1(%rbx,%rdx)
pcmpeqd %xmm1,%xmm0
pand %xmm1,%xmm2
pand %xmm1,%xmm3
pand %xmm0,%xmm4
pand %xmm0,%xmm5
pxor %xmm0,%xmm0
por %xmm2,%xmm4
por %xmm3,%xmm5
movdqu %xmm4,-16*2($rptr)
movdqu %xmm5,-16*1($rptr)
add \$32,$num
jnz .Lsqr8x_cond_copy
mov \$1,%rax
mov -48(%rsi),%r15
.cfi_restore %r15
mov -40(%rsi),%r14
.cfi_restore %r14
mov -32(%rsi),%r13
.cfi_restore %r13
mov -24(%rsi),%r12
.cfi_restore %r12
mov -16(%rsi),%rbp
.cfi_restore %rbp
mov -8(%rsi),%rbx
.cfi_restore %rbx
lea (%rsi),%rsp
.cfi_def_cfa_register %rsp
.Lsqr8x_epilogue:
ret
.cfi_endproc
.size bn_sqr8x_mont,.-bn_sqr8x_mont
___
}}}
if ($addx) {{{
my $bp="%rdx"; # original value
$code.=<<___;
.type bn_mulx4x_mont,\@function,6
.align 32
bn_mulx4x_mont:
.cfi_startproc
mov %rsp,%rax
.cfi_def_cfa_register %rax
.Lmulx4x_enter:
push %rbx
.cfi_push %rbx
push %rbp
.cfi_push %rbp
push %r12
.cfi_push %r12
push %r13
.cfi_push %r13
push %r14
.cfi_push %r14
push %r15
.cfi_push %r15
.Lmulx4x_prologue:
shl \$3,${num}d # convert $num to bytes
xor %r10,%r10
sub $num,%r10 # -$num
mov ($n0),$n0 # *n0
lea -72(%rsp,%r10),%rbp # future alloca(frame+$num+8)
and \$-128,%rbp
mov %rsp,%r11
sub %rbp,%r11
and \$-4096,%r11
lea (%rbp,%r11),%rsp
mov (%rsp),%r10
cmp %rbp,%rsp
ja .Lmulx4x_page_walk
jmp .Lmulx4x_page_walk_done
.align 16
.Lmulx4x_page_walk:
lea -4096(%rsp),%rsp
mov (%rsp),%r10
cmp %rbp,%rsp
ja .Lmulx4x_page_walk
.Lmulx4x_page_walk_done:
lea ($bp,$num),%r10
##############################################################
# Stack layout
# +0 num
# +8 off-loaded &b[i]
# +16 end of b[num]
# +24 saved n0
# +32 saved rp
# +40 saved %rsp
# +48 inner counter
# +56
# +64 tmp[num+1]
#
mov $num,0(%rsp) # save $num
shr \$5,$num
mov %r10,16(%rsp) # end of b[num]
sub \$1,$num
mov $n0, 24(%rsp) # save *n0
mov $rp, 32(%rsp) # save $rp
mov %rax,40(%rsp) # save original %rsp
.cfi_cfa_expression %rsp+40,deref,+8
mov $num,48(%rsp) # inner counter
jmp .Lmulx4x_body
.align 32
.Lmulx4x_body:
___
my ($aptr, $bptr, $nptr, $tptr, $mi, $bi, $zero, $num)=
("%rsi","%rdi","%rcx","%rbx","%r8","%r9","%rbp","%rax");
my $rptr=$bptr;
$code.=<<___;
lea 8($bp),$bptr
mov ($bp),%rdx # b[0], $bp==%rdx actually
lea 64+32(%rsp),$tptr
mov %rdx,$bi
mulx 0*8($aptr),$mi,%rax # a[0]*b[0]
mulx 1*8($aptr),%r11,%r14 # a[1]*b[0]
add %rax,%r11
mov $bptr,8(%rsp) # off-load &b[i]
mulx 2*8($aptr),%r12,%r13 # ...
adc %r14,%r12
adc \$0,%r13
mov $mi,$bptr # borrow $bptr
imulq 24(%rsp),$mi # "t[0]"*n0
xor $zero,$zero # cf=0, of=0
mulx 3*8($aptr),%rax,%r14
mov $mi,%rdx
lea 4*8($aptr),$aptr
adcx %rax,%r13
adcx $zero,%r14 # cf=0
mulx 0*8($nptr),%rax,%r10
adcx %rax,$bptr # discarded
adox %r11,%r10
mulx 1*8($nptr),%rax,%r11
adcx %rax,%r10
adox %r12,%r11
.byte 0xc4,0x62,0xfb,0xf6,0xa1,0x10,0x00,0x00,0x00 # mulx 2*8($nptr),%rax,%r12
mov 48(%rsp),$bptr # counter value
mov %r10,-4*8($tptr)
adcx %rax,%r11
adox %r13,%r12
mulx 3*8($nptr),%rax,%r15
mov $bi,%rdx
mov %r11,-3*8($tptr)
adcx %rax,%r12
adox $zero,%r15 # of=0
lea 4*8($nptr),$nptr
mov %r12,-2*8($tptr)
jmp .Lmulx4x_1st
.align 32
.Lmulx4x_1st:
adcx $zero,%r15 # cf=0, modulo-scheduled
mulx 0*8($aptr),%r10,%rax # a[4]*b[0]
adcx %r14,%r10
mulx 1*8($aptr),%r11,%r14 # a[5]*b[0]
adcx %rax,%r11
mulx 2*8($aptr),%r12,%rax # ...
adcx %r14,%r12
mulx 3*8($aptr),%r13,%r14
.byte 0x67,0x67
mov $mi,%rdx
adcx %rax,%r13
adcx $zero,%r14 # cf=0
lea 4*8($aptr),$aptr
lea 4*8($tptr),$tptr
adox %r15,%r10
mulx 0*8($nptr),%rax,%r15
adcx %rax,%r10
adox %r15,%r11
mulx 1*8($nptr),%rax,%r15
adcx %rax,%r11
adox %r15,%r12
mulx 2*8($nptr),%rax,%r15
mov %r10,-5*8($tptr)
adcx %rax,%r12
mov %r11,-4*8($tptr)
adox %r15,%r13
mulx 3*8($nptr),%rax,%r15
mov $bi,%rdx
mov %r12,-3*8($tptr)
adcx %rax,%r13
adox $zero,%r15
lea 4*8($nptr),$nptr
mov %r13,-2*8($tptr)
dec $bptr # of=0, pass cf
jnz .Lmulx4x_1st
mov 0(%rsp),$num # load num
mov 8(%rsp),$bptr # re-load &b[i]
adc $zero,%r15 # modulo-scheduled
add %r15,%r14
sbb %r15,%r15 # top-most carry
mov %r14,-1*8($tptr)
jmp .Lmulx4x_outer
.align 32
.Lmulx4x_outer:
mov ($bptr),%rdx # b[i]
lea 8($bptr),$bptr # b++
sub $num,$aptr # rewind $aptr
mov %r15,($tptr) # save top-most carry
lea 64+4*8(%rsp),$tptr
sub $num,$nptr # rewind $nptr
mulx 0*8($aptr),$mi,%r11 # a[0]*b[i]
xor %ebp,%ebp # xor $zero,$zero # cf=0, of=0
mov %rdx,$bi
mulx 1*8($aptr),%r14,%r12 # a[1]*b[i]
adox -4*8($tptr),$mi
adcx %r14,%r11
mulx 2*8($aptr),%r15,%r13 # ...
adox -3*8($tptr),%r11
adcx %r15,%r12
adox -2*8($tptr),%r12
adcx $zero,%r13
adox $zero,%r13
mov $bptr,8(%rsp) # off-load &b[i]
mov $mi,%r15
imulq 24(%rsp),$mi # "t[0]"*n0
xor %ebp,%ebp # xor $zero,$zero # cf=0, of=0
mulx 3*8($aptr),%rax,%r14
mov $mi,%rdx
adcx %rax,%r13
adox -1*8($tptr),%r13
adcx $zero,%r14
lea 4*8($aptr),$aptr
adox $zero,%r14
mulx 0*8($nptr),%rax,%r10
adcx %rax,%r15 # discarded
adox %r11,%r10
mulx 1*8($nptr),%rax,%r11
adcx %rax,%r10
adox %r12,%r11
mulx 2*8($nptr),%rax,%r12
mov %r10,-4*8($tptr)
adcx %rax,%r11
adox %r13,%r12
mulx 3*8($nptr),%rax,%r15
mov $bi,%rdx
mov %r11,-3*8($tptr)
lea 4*8($nptr),$nptr
adcx %rax,%r12
adox $zero,%r15 # of=0
mov 48(%rsp),$bptr # counter value
mov %r12,-2*8($tptr)
jmp .Lmulx4x_inner
.align 32
.Lmulx4x_inner:
mulx 0*8($aptr),%r10,%rax # a[4]*b[i]
adcx $zero,%r15 # cf=0, modulo-scheduled
adox %r14,%r10
mulx 1*8($aptr),%r11,%r14 # a[5]*b[i]
adcx 0*8($tptr),%r10
adox %rax,%r11
mulx 2*8($aptr),%r12,%rax # ...
adcx 1*8($tptr),%r11
adox %r14,%r12
mulx 3*8($aptr),%r13,%r14
mov $mi,%rdx
adcx 2*8($tptr),%r12
adox %rax,%r13
adcx 3*8($tptr),%r13
adox $zero,%r14 # of=0
lea 4*8($aptr),$aptr
lea 4*8($tptr),$tptr
adcx $zero,%r14 # cf=0
adox %r15,%r10
mulx 0*8($nptr),%rax,%r15
adcx %rax,%r10
adox %r15,%r11
mulx 1*8($nptr),%rax,%r15
adcx %rax,%r11
adox %r15,%r12
mulx 2*8($nptr),%rax,%r15
mov %r10,-5*8($tptr)
adcx %rax,%r12
adox %r15,%r13
mulx 3*8($nptr),%rax,%r15
mov $bi,%rdx
mov %r11,-4*8($tptr)
mov %r12,-3*8($tptr)
adcx %rax,%r13
adox $zero,%r15
lea 4*8($nptr),$nptr
mov %r13,-2*8($tptr)
dec $bptr # of=0, pass cf
jnz .Lmulx4x_inner
mov 0(%rsp),$num # load num
mov 8(%rsp),$bptr # re-load &b[i]
adc $zero,%r15 # modulo-scheduled
sub 0*8($tptr),$zero # pull top-most carry
adc %r15,%r14
sbb %r15,%r15 # top-most carry
mov %r14,-1*8($tptr)
cmp 16(%rsp),$bptr
jne .Lmulx4x_outer
lea 64(%rsp),$tptr
sub $num,$nptr # rewind $nptr
neg %r15
mov $num,%rdx
shr \$3+2,$num # %cf=0
mov 32(%rsp),$rptr # restore rp
jmp .Lmulx4x_sub
.align 32
.Lmulx4x_sub:
mov 8*0($tptr),%r11
mov 8*1($tptr),%r12
mov 8*2($tptr),%r13
mov 8*3($tptr),%r14
lea 8*4($tptr),$tptr
sbb 8*0($nptr),%r11
sbb 8*1($nptr),%r12
sbb 8*2($nptr),%r13
sbb 8*3($nptr),%r14
lea 8*4($nptr),$nptr
mov %r11,8*0($rptr)
mov %r12,8*1($rptr)
mov %r13,8*2($rptr)
mov %r14,8*3($rptr)
lea 8*4($rptr),$rptr
dec $num # preserves %cf
jnz .Lmulx4x_sub
sbb \$0,%r15 # top-most carry
lea 64(%rsp),$tptr
sub %rdx,$rptr # rewind
movq %r15,%xmm1
pxor %xmm0,%xmm0
pshufd \$0,%xmm1,%xmm1
mov 40(%rsp),%rsi # restore %rsp
.cfi_def_cfa %rsi,8
jmp .Lmulx4x_cond_copy
.align 32
.Lmulx4x_cond_copy:
movdqa 16*0($tptr),%xmm2
movdqa 16*1($tptr),%xmm3
lea 16*2($tptr),$tptr
movdqu 16*0($rptr),%xmm4
movdqu 16*1($rptr),%xmm5
lea 16*2($rptr),$rptr
movdqa %xmm0,-16*2($tptr) # zero tp
movdqa %xmm0,-16*1($tptr)
pcmpeqd %xmm1,%xmm0
pand %xmm1,%xmm2
pand %xmm1,%xmm3
pand %xmm0,%xmm4
pand %xmm0,%xmm5
pxor %xmm0,%xmm0
por %xmm2,%xmm4
por %xmm3,%xmm5
movdqu %xmm4,-16*2($rptr)
movdqu %xmm5,-16*1($rptr)
sub \$32,%rdx
jnz .Lmulx4x_cond_copy
mov %rdx,($tptr)
mov \$1,%rax
mov -48(%rsi),%r15
.cfi_restore %r15
mov -40(%rsi),%r14
.cfi_restore %r14
mov -32(%rsi),%r13
.cfi_restore %r13
mov -24(%rsi),%r12
.cfi_restore %r12
mov -16(%rsi),%rbp
.cfi_restore %rbp
mov -8(%rsi),%rbx
.cfi_restore %rbx
lea (%rsi),%rsp
.cfi_def_cfa_register %rsp
.Lmulx4x_epilogue:
ret
.cfi_endproc
.size bn_mulx4x_mont,.-bn_mulx4x_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 $num
mov 8(%rax,%r10,8),%rax # pull saved stack pointer
jmp .Lcommon_pop_regs
.size mul_handler,.-mul_handler
.type sqr_handler,\@abi-omnipotent
.align 16
sqr_handler:
push %rsi
push %rdi
push %rbx
push %rbp
push %r12
push %r13
push %r14
push %r15
pushfq
sub \$64,%rsp
mov 120($context),%rax # pull context->Rax
mov 248($context),%rbx # pull context->Rip
mov 8($disp),%rsi # disp->ImageBase
mov 56($disp),%r11 # disp->HandlerData
mov 0(%r11),%r10d # HandlerData[0]
lea (%rsi,%r10),%r10 # end of prologue label
cmp %r10,%rbx # context->Rip<.Lsqr_prologue
jb .Lcommon_seh_tail
mov 4(%r11),%r10d # HandlerData[1]
lea (%rsi,%r10),%r10 # body label
cmp %r10,%rbx # context->Rip<.Lsqr_body
jb .Lcommon_pop_regs
mov 152($context),%rax # pull context->Rsp
mov 8(%r11),%r10d # HandlerData[2]
lea (%rsi,%r10),%r10 # epilogue label
cmp %r10,%rbx # context->Rip>=.Lsqr_epilogue
jae .Lcommon_seh_tail
mov 40(%rax),%rax # pull saved stack pointer
.Lcommon_pop_regs:
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_sqr8x_mont
.rva .LSEH_end_bn_sqr8x_mont
.rva .LSEH_info_bn_sqr8x_mont
___
$code.=<<___ if ($addx);
.rva .LSEH_begin_bn_mulx4x_mont
.rva .LSEH_end_bn_mulx4x_mont
.rva .LSEH_info_bn_mulx4x_mont
___
$code.=<<___;
.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_sqr8x_mont:
.byte 9,0,0,0
.rva sqr_handler
.rva .Lsqr8x_prologue,.Lsqr8x_body,.Lsqr8x_epilogue # HandlerData[]
.align 8
___
$code.=<<___ if ($addx);
.LSEH_info_bn_mulx4x_mont:
.byte 9,0,0,0
.rva sqr_handler
.rva .Lmulx4x_prologue,.Lmulx4x_body,.Lmulx4x_epilogue # HandlerData[]
.align 8
___
}
print $code;
close STDOUT;
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