crypto/fipsmodule/md5/asm/md5-x86_64.pl - boringssl - Git at Google

 #!/usr/bin/perl -w
 #
 # MD5 optimized for AMD64.
 #
 # Author: Marc Bevand <bevand_m (at) epita.fr>
 # Licence: I hereby disclaim the copyright on this code and place it
 # in the public domain.
 #

 use strict;

 my $code;

 # round1_step() does:
 #   dst = x + ((dst + F(x,y,z) + X[k] + T_i) <<< s)
 #   %r10d = X[k_next]
 #   %r11d = z' (copy of z for the next step)
 # Each round1_step() takes about 5.3 clocks (9 instructions, 1.7 IPC)
 sub round1_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
     $code .= " mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */\n" if ($pos == -1);
     $code .= " mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
     $code .= <<EOF;
 	xor	$y,		%r11d		/* y ^ ... */
 	lea	$T_i($dst,%r10d),$dst		/* Const + dst + ... */
 	and	$x,		%r11d		/* x & ... */
 	xor	$z,		%r11d		/* z ^ ... */
 	mov	$k_next*4(%rsi),%r10d		/* (NEXT STEP) X[$k_next] */
 	add	%r11d,		$dst		/* dst += ... */
 	rol	\$$s,		$dst		/* dst <<< s */
 	mov	$y,		%r11d		/* (NEXT STEP) z' = $y */
 	add	$x,		$dst		/* dst += x */
 EOF
 }

 # round2_step() does:
 #   dst = x + ((dst + G(x,y,z) + X[k] + T_i) <<< s)
 #   %r10d = X[k_next]
 #   %r11d = z' (copy of z for the next step)
 #   %r12d = z' (copy of z for the next step)
 # Each round2_step() takes about 5.4 clocks (11 instructions, 2.0 IPC)
 sub round2_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
     $code .= " mov	1*4(%rsi),	%r10d		/* (NEXT STEP) X[1] */\n" if ($pos == -1);
     $code .= " mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
     $code .= " mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
     $code .= <<EOF;
 	not	%r11d				/* not z */
 	lea	$T_i($dst,%r10d),$dst		/* Const + dst + ... */
 	and	$x,		%r12d		/* x & z */
 	and	$y,		%r11d		/* y & (not z) */
 	mov	$k_next*4(%rsi),%r10d		/* (NEXT STEP) X[$k_next] */
 	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
 	mov	$y,		%r11d		/* (NEXT STEP) z' = $y */
 	add	%r12d,		$dst		/* dst += ... */
 	mov	$y,		%r12d		/* (NEXT STEP) z' = $y */
 	rol	\$$s,		$dst		/* dst <<< s */
 	add	$x,		$dst		/* dst += x */
 EOF
 }

 # round3_step() does:
 #   dst = x + ((dst + H(x,y,z) + X[k] + T_i) <<< s)
 #   %r10d = X[k_next]
 #   %r11d = y' (copy of y for the next step)
 # Each round3_step() takes about 4.2 clocks (8 instructions, 1.9 IPC)
 sub round3_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
     $code .= " mov	5*4(%rsi),	%r10d		/* (NEXT STEP) X[5] */\n" if ($pos == -1);
     $code .= " mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */\n" if ($pos == -1);
     $code .= <<EOF;
 	lea	$T_i($dst,%r10d),$dst		/* Const + dst + ... */
 	mov	$k_next*4(%rsi),%r10d		/* (NEXT STEP) X[$k_next] */
 	xor	$z,		%r11d		/* z ^ ... */
 	xor	$x,		%r11d		/* x ^ ... */
 	add	%r11d,		$dst		/* dst += ... */
 	rol	\$$s,		$dst		/* dst <<< s */
 	mov	$x,		%r11d		/* (NEXT STEP) y' = $x */
 	add	$x,		$dst		/* dst += x */
 EOF
 }

 # round4_step() does:
 #   dst = x + ((dst + I(x,y,z) + X[k] + T_i) <<< s)
 #   %r10d = X[k_next]
 #   %r11d = not z' (copy of not z for the next step)
 # Each round4_step() takes about 5.2 clocks (9 instructions, 1.7 IPC)
 sub round4_step
 {
     my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
     $code .= " mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */\n" if ($pos == -1);
     $code .= " mov	\$0xffffffff,	%r11d\n" if ($pos == -1);
     $code .= " xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx*/\n"
     if ($pos == -1);
     $code .= <<EOF;
 	lea	$T_i($dst,%r10d),$dst		/* Const + dst + ... */
 	or	$x,		%r11d		/* x | ... */
 	xor	$y,		%r11d		/* y ^ ... */
 	add	%r11d,		$dst		/* dst += ... */
 	mov	$k_next*4(%rsi),%r10d		/* (NEXT STEP) X[$k_next] */
 	mov	\$0xffffffff,	%r11d
 	rol	\$$s,		$dst		/* dst <<< s */
 	xor	$y,		%r11d		/* (NEXT STEP) not z' = not $y */
 	add	$x,		$dst		/* dst += x */
 EOF
 }

 no warnings qw(uninitialized);
 my $flavour = shift;
 my $output  = shift;
 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }

 my $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);

 $0 =~ m/(.*[\/\\])[^\/\\]+$/; my $dir=$1; my $xlate;
 ( $xlate="${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;

 $code .= <<EOF;
 .text
 .align 16

 .globl md5_block_asm_data_order
 .type md5_block_asm_data_order,\@function,3
 md5_block_asm_data_order:
 .cfi_startproc
 	push	%rbp
 .cfi_push	rbp
 	push	%rbx
 .cfi_push	rbx
 	push	%r12
 .cfi_push	r12
 	push	%r14
 .cfi_push	r14
 	push	%r15
 .cfi_push	r15
 .Lprologue:

 	# rdi = arg #1 (ctx, MD5_CTX pointer)
 	# rsi = arg #2 (ptr, data pointer)
 	# rdx = arg #3 (nbr, number of 16-word blocks to process)
 	mov	%rdi,		%rbp	# rbp = ctx
 	shl	\$6,		%rdx	# rdx = nbr in bytes
 	lea	(%rsi,%rdx),	%rdi	# rdi = end
 	mov	0*4(%rbp),	%eax	# eax = ctx->A
 	mov	1*4(%rbp),	%ebx	# ebx = ctx->B
 	mov	2*4(%rbp),	%ecx	# ecx = ctx->C
 	mov	3*4(%rbp),	%edx	# edx = ctx->D
 	# end is 'rdi'
 	# ptr is 'rsi'
 	# A is 'eax'
 	# B is 'ebx'
 	# C is 'ecx'
 	# D is 'edx'

 	cmp	%rdi,		%rsi		# cmp end with ptr
 	je	.Lend				# jmp if ptr == end

 	# BEGIN of loop over 16-word blocks
 .Lloop:	# save old values of A, B, C, D
 	mov	%eax,		%r8d
 	mov	%ebx,		%r9d
 	mov	%ecx,		%r14d
 	mov	%edx,		%r15d
 EOF
 round1_step(-1,'%eax','%ebx','%ecx','%edx', '1','0xd76aa478', '7');
 round1_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xe8c7b756','12');
 round1_step( 0,'%ecx','%edx','%eax','%ebx', '3','0x242070db','17');
 round1_step( 0,'%ebx','%ecx','%edx','%eax', '4','0xc1bdceee','22');
 round1_step( 0,'%eax','%ebx','%ecx','%edx', '5','0xf57c0faf', '7');
 round1_step( 0,'%edx','%eax','%ebx','%ecx', '6','0x4787c62a','12');
 round1_step( 0,'%ecx','%edx','%eax','%ebx', '7','0xa8304613','17');
 round1_step( 0,'%ebx','%ecx','%edx','%eax', '8','0xfd469501','22');
 round1_step( 0,'%eax','%ebx','%ecx','%edx', '9','0x698098d8', '7');
 round1_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8b44f7af','12');
 round1_step( 0,'%ecx','%edx','%eax','%ebx','11','0xffff5bb1','17');
 round1_step( 0,'%ebx','%ecx','%edx','%eax','12','0x895cd7be','22');
 round1_step( 0,'%eax','%ebx','%ecx','%edx','13','0x6b901122', '7');
 round1_step( 0,'%edx','%eax','%ebx','%ecx','14','0xfd987193','12');
 round1_step( 0,'%ecx','%edx','%eax','%ebx','15','0xa679438e','17');
 round1_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x49b40821','22');

 round2_step(-1,'%eax','%ebx','%ecx','%edx', '6','0xf61e2562', '5');
 round2_step( 0,'%edx','%eax','%ebx','%ecx','11','0xc040b340', '9');
 round2_step( 0,'%ecx','%edx','%eax','%ebx', '0','0x265e5a51','14');
 round2_step( 0,'%ebx','%ecx','%edx','%eax', '5','0xe9b6c7aa','20');
 round2_step( 0,'%eax','%ebx','%ecx','%edx','10','0xd62f105d', '5');
 round2_step( 0,'%edx','%eax','%ebx','%ecx','15', '0x2441453', '9');
 round2_step( 0,'%ecx','%edx','%eax','%ebx', '4','0xd8a1e681','14');
 round2_step( 0,'%ebx','%ecx','%edx','%eax', '9','0xe7d3fbc8','20');
 round2_step( 0,'%eax','%ebx','%ecx','%edx','14','0x21e1cde6', '5');
 round2_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xc33707d6', '9');
 round2_step( 0,'%ecx','%edx','%eax','%ebx', '8','0xf4d50d87','14');
 round2_step( 0,'%ebx','%ecx','%edx','%eax','13','0x455a14ed','20');
 round2_step( 0,'%eax','%ebx','%ecx','%edx', '2','0xa9e3e905', '5');
 round2_step( 0,'%edx','%eax','%ebx','%ecx', '7','0xfcefa3f8', '9');
 round2_step( 0,'%ecx','%edx','%eax','%ebx','12','0x676f02d9','14');
 round2_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x8d2a4c8a','20');

 round3_step(-1,'%eax','%ebx','%ecx','%edx', '8','0xfffa3942', '4');
 round3_step( 0,'%edx','%eax','%ebx','%ecx','11','0x8771f681','11');
 round3_step( 0,'%ecx','%edx','%eax','%ebx','14','0x6d9d6122','16');
 round3_step( 0,'%ebx','%ecx','%edx','%eax', '1','0xfde5380c','23');
 round3_step( 0,'%eax','%ebx','%ecx','%edx', '4','0xa4beea44', '4');
 round3_step( 0,'%edx','%eax','%ebx','%ecx', '7','0x4bdecfa9','11');
 round3_step( 0,'%ecx','%edx','%eax','%ebx','10','0xf6bb4b60','16');
 round3_step( 0,'%ebx','%ecx','%edx','%eax','13','0xbebfbc70','23');
 round3_step( 0,'%eax','%ebx','%ecx','%edx', '0','0x289b7ec6', '4');
 round3_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xeaa127fa','11');
 round3_step( 0,'%ecx','%edx','%eax','%ebx', '6','0xd4ef3085','16');
 round3_step( 0,'%ebx','%ecx','%edx','%eax', '9', '0x4881d05','23');
 round3_step( 0,'%eax','%ebx','%ecx','%edx','12','0xd9d4d039', '4');
 round3_step( 0,'%edx','%eax','%ebx','%ecx','15','0xe6db99e5','11');
 round3_step( 0,'%ecx','%edx','%eax','%ebx', '2','0x1fa27cf8','16');
 round3_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xc4ac5665','23');

 round4_step(-1,'%eax','%ebx','%ecx','%edx', '7','0xf4292244', '6');
 round4_step( 0,'%edx','%eax','%ebx','%ecx','14','0x432aff97','10');
 round4_step( 0,'%ecx','%edx','%eax','%ebx', '5','0xab9423a7','15');
 round4_step( 0,'%ebx','%ecx','%edx','%eax','12','0xfc93a039','21');
 round4_step( 0,'%eax','%ebx','%ecx','%edx', '3','0x655b59c3', '6');
 round4_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8f0ccc92','10');
 round4_step( 0,'%ecx','%edx','%eax','%ebx', '1','0xffeff47d','15');
 round4_step( 0,'%ebx','%ecx','%edx','%eax', '8','0x85845dd1','21');
 round4_step( 0,'%eax','%ebx','%ecx','%edx','15','0x6fa87e4f', '6');
 round4_step( 0,'%edx','%eax','%ebx','%ecx', '6','0xfe2ce6e0','10');
 round4_step( 0,'%ecx','%edx','%eax','%ebx','13','0xa3014314','15');
 round4_step( 0,'%ebx','%ecx','%edx','%eax', '4','0x4e0811a1','21');
 round4_step( 0,'%eax','%ebx','%ecx','%edx','11','0xf7537e82', '6');
 round4_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xbd3af235','10');
 round4_step( 0,'%ecx','%edx','%eax','%ebx', '9','0x2ad7d2bb','15');
 round4_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xeb86d391','21');
 $code .= <<EOF;
 	# add old values of A, B, C, D
 	add	%r8d,	%eax
 	add	%r9d,	%ebx
 	add	%r14d,	%ecx
 	add	%r15d,	%edx

 	# loop control
 	add	\$64,		%rsi		# ptr += 64
 	cmp	%rdi,		%rsi		# cmp end with ptr
 	jb	.Lloop				# jmp if ptr < end
 	# END of loop over 16-word blocks

 .Lend:
 	mov	%eax,		0*4(%rbp)	# ctx->A = A
 	mov	%ebx,		1*4(%rbp)	# ctx->B = B
 	mov	%ecx,		2*4(%rbp)	# ctx->C = C
 	mov	%edx,		3*4(%rbp)	# ctx->D = D

 	mov	(%rsp),%r15
 .cfi_restore r15
 	mov	8(%rsp),%r14
 .cfi_restore r14
 	mov	16(%rsp),%r12
 .cfi_restore r12
 	mov	24(%rsp),%rbx
 .cfi_restore rbx
 	mov	32(%rsp),%rbp
 .cfi_restore rbp
 	add	\$40,%rsp
 .cfi_adjust_cfa_offset	-40
 .Lepilogue:
 	ret
 .cfi_endproc
 .size md5_block_asm_data_order,.-md5_block_asm_data_order
 EOF

 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
 #		CONTEXT *context,DISPATCHER_CONTEXT *disp)
 if ($win64) {
 my $rec="%rcx";
 my $frame="%rdx";
 my $context="%r8";
 my $disp="%r9";

 $code.=<<___;
 .extern	__imp_RtlVirtualUnwind
 .type	se_handler,\@abi-omnipotent
 .align	16
 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

 	lea	.Lprologue(%rip),%r10
 	cmp	%r10,%rbx		# context->Rip<.Lprologue
 	jb	.Lin_prologue

 	mov	152($context),%rax	# pull context->Rsp

 	lea	.Lepilogue(%rip),%r10
 	cmp	%r10,%rbx		# context->Rip>=.Lepilogue
 	jae	.Lin_prologue

 	lea	40(%rax),%rax

 	mov	-8(%rax),%rbp
 	mov	-16(%rax),%rbx
 	mov	-24(%rax),%r12
 	mov	-32(%rax),%r14
 	mov	-40(%rax),%r15
 	mov	%rbx,144($context)	# restore context->Rbx
 	mov	%rbp,160($context)	# restore context->Rbp
 	mov	%r12,216($context)	# restore context->R12
 	mov	%r14,232($context)	# restore context->R14
 	mov	%r15,240($context)	# restore context->R15

 .Lin_prologue:
 	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	se_handler,.-se_handler

 .section	.pdata
 .align	4
 	.rva	.LSEH_begin_md5_block_asm_data_order
 	.rva	.LSEH_end_md5_block_asm_data_order
 	.rva	.LSEH_info_md5_block_asm_data_order

 .section	.xdata
 .align	8
 .LSEH_info_md5_block_asm_data_order:
 	.byte	9,0,0,0
 	.rva	se_handler
 ___
 }

 print $code;

 close STDOUT or die "error closing STDOUT";
	#!/usr/bin/perl -w
	#
	# MD5 optimized for AMD64.
	#
	# Author: Marc Bevand <bevand_m (at) epita.fr>
	# Licence: I hereby disclaim the copyright on this code and place it
	# in the public domain.
	#

	use strict;

	my $code;

	# round1_step() does:
	# dst = x + ((dst + F(x,y,z) + X[k] + T_i) <<< s)
	# %r10d = X[k_next]
	# %r11d = z' (copy of z for the next step)
	# Each round1_step() takes about 5.3 clocks (9 instructions, 1.7 IPC)
	sub round1_step
	{
	my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
	$code .= " mov 04(%rsi), %r10d / (NEXT STEP) X[0] */\n" if ($pos == -1);
	$code .= " mov %edx, %r11d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
	$code .= <<EOF;
	xor $y, %r11d /* y ^ ... */
	lea $T_i($dst,%r10d),$dst /* Const + dst + ... */
	and $x, %r11d /* x & ... */
	xor $z, %r11d /* z ^ ... */
	mov $k_next4(%rsi),%r10d / (NEXT STEP) X[$k_next] */
	add %r11d, $dst /* dst += ... */
	rol \$$s, $dst /* dst <<< s */
	mov $y, %r11d /* (NEXT STEP) z' = $y */
	add $x, $dst /* dst += x */
	EOF
	}

	# round2_step() does:
	# dst = x + ((dst + G(x,y,z) + X[k] + T_i) <<< s)
	# %r10d = X[k_next]
	# %r11d = z' (copy of z for the next step)
	# %r12d = z' (copy of z for the next step)
	# Each round2_step() takes about 5.4 clocks (11 instructions, 2.0 IPC)
	sub round2_step
	{
	my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
	$code .= " mov 14(%rsi), %r10d / (NEXT STEP) X[1] */\n" if ($pos == -1);
	$code .= " mov %edx, %r11d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
	$code .= " mov %edx, %r12d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);
	$code .= <<EOF;
	not %r11d /* not z */
	lea $T_i($dst,%r10d),$dst /* Const + dst + ... */
	and $x, %r12d /* x & z */
	and $y, %r11d /* y & (not z) */
	mov $k_next4(%rsi),%r10d / (NEXT STEP) X[$k_next] */
	or %r11d, %r12d /* (y & (not z)) \| (x & z) */
	mov $y, %r11d /* (NEXT STEP) z' = $y */
	add %r12d, $dst /* dst += ... */
	mov $y, %r12d /* (NEXT STEP) z' = $y */
	rol \$$s, $dst /* dst <<< s */
	add $x, $dst /* dst += x */
	EOF
	}

	# round3_step() does:
	# dst = x + ((dst + H(x,y,z) + X[k] + T_i) <<< s)
	# %r10d = X[k_next]
	# %r11d = y' (copy of y for the next step)
	# Each round3_step() takes about 4.2 clocks (8 instructions, 1.9 IPC)
	sub round3_step
	{
	my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
	$code .= " mov 54(%rsi), %r10d / (NEXT STEP) X[5] */\n" if ($pos == -1);
	$code .= " mov %ecx, %r11d /* (NEXT STEP) y' = %ecx */\n" if ($pos == -1);
	$code .= <<EOF;
	lea $T_i($dst,%r10d),$dst /* Const + dst + ... */
	mov $k_next4(%rsi),%r10d / (NEXT STEP) X[$k_next] */
	xor $z, %r11d /* z ^ ... */
	xor $x, %r11d /* x ^ ... */
	add %r11d, $dst /* dst += ... */
	rol \$$s, $dst /* dst <<< s */
	mov $x, %r11d /* (NEXT STEP) y' = $x */
	add $x, $dst /* dst += x */
	EOF
	}

	# round4_step() does:
	# dst = x + ((dst + I(x,y,z) + X[k] + T_i) <<< s)
	# %r10d = X[k_next]
	# %r11d = not z' (copy of not z for the next step)
	# Each round4_step() takes about 5.2 clocks (9 instructions, 1.7 IPC)
	sub round4_step
	{
	my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;
	$code .= " mov 04(%rsi), %r10d / (NEXT STEP) X[0] */\n" if ($pos == -1);
	$code .= " mov \$0xffffffff, %r11d\n" if ($pos == -1);
	$code .= " xor %edx, %r11d /* (NEXT STEP) not z' = not %edx*/\n"
	if ($pos == -1);
	$code .= <<EOF;
	lea $T_i($dst,%r10d),$dst /* Const + dst + ... */
	or $x, %r11d /* x \| ... */
	xor $y, %r11d /* y ^ ... */
	add %r11d, $dst /* dst += ... */
	mov $k_next4(%rsi),%r10d / (NEXT STEP) X[$k_next] */
	mov \$0xffffffff, %r11d
	rol \$$s, $dst /* dst <<< s */
	xor $y, %r11d /* (NEXT STEP) not z' = not $y */
	add $x, $dst /* dst += x */
	EOF
	}

	no warnings qw(uninitialized);
	my $flavour = shift;
	my $output = shift;
	if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }

	my $win64=0; $win64=1 if ($flavour =~ /[nm]asm\|mingw64/ \|\| $output =~ /\.asm$/);

	$0 =~ m/(.*[\/\\])[^\/\\]+$/; my $dir=$1; my $xlate;
	( $xlate="${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;

	$code .= <<EOF;
	.text
	.align 16

	.globl md5_block_asm_data_order
	.type md5_block_asm_data_order,\@function,3
	md5_block_asm_data_order:
	.cfi_startproc
	push %rbp
	.cfi_push rbp
	push %rbx
	.cfi_push rbx
	push %r12
	.cfi_push r12
	push %r14
	.cfi_push r14
	push %r15
	.cfi_push r15
	.Lprologue:

	# rdi = arg #1 (ctx, MD5_CTX pointer)
	# rsi = arg #2 (ptr, data pointer)
	# rdx = arg #3 (nbr, number of 16-word blocks to process)
	mov %rdi, %rbp # rbp = ctx
	shl \$6, %rdx # rdx = nbr in bytes
	lea (%rsi,%rdx), %rdi # rdi = end
	mov 0*4(%rbp), %eax # eax = ctx->A
	mov 1*4(%rbp), %ebx # ebx = ctx->B
	mov 2*4(%rbp), %ecx # ecx = ctx->C
	mov 3*4(%rbp), %edx # edx = ctx->D
	# end is 'rdi'
	# ptr is 'rsi'
	# A is 'eax'
	# B is 'ebx'
	# C is 'ecx'
	# D is 'edx'

	cmp %rdi, %rsi # cmp end with ptr
	je .Lend # jmp if ptr == end

	# BEGIN of loop over 16-word blocks
	.Lloop: # save old values of A, B, C, D
	mov %eax, %r8d
	mov %ebx, %r9d
	mov %ecx, %r14d
	mov %edx, %r15d
	EOF
	round1_step(-1,'%eax','%ebx','%ecx','%edx', '1','0xd76aa478', '7');
	round1_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xe8c7b756','12');
	round1_step( 0,'%ecx','%edx','%eax','%ebx', '3','0x242070db','17');
	round1_step( 0,'%ebx','%ecx','%edx','%eax', '4','0xc1bdceee','22');
	round1_step( 0,'%eax','%ebx','%ecx','%edx', '5','0xf57c0faf', '7');
	round1_step( 0,'%edx','%eax','%ebx','%ecx', '6','0x4787c62a','12');
	round1_step( 0,'%ecx','%edx','%eax','%ebx', '7','0xa8304613','17');
	round1_step( 0,'%ebx','%ecx','%edx','%eax', '8','0xfd469501','22');
	round1_step( 0,'%eax','%ebx','%ecx','%edx', '9','0x698098d8', '7');
	round1_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8b44f7af','12');
	round1_step( 0,'%ecx','%edx','%eax','%ebx','11','0xffff5bb1','17');
	round1_step( 0,'%ebx','%ecx','%edx','%eax','12','0x895cd7be','22');
	round1_step( 0,'%eax','%ebx','%ecx','%edx','13','0x6b901122', '7');
	round1_step( 0,'%edx','%eax','%ebx','%ecx','14','0xfd987193','12');
	round1_step( 0,'%ecx','%edx','%eax','%ebx','15','0xa679438e','17');
	round1_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x49b40821','22');

	round2_step(-1,'%eax','%ebx','%ecx','%edx', '6','0xf61e2562', '5');
	round2_step( 0,'%edx','%eax','%ebx','%ecx','11','0xc040b340', '9');
	round2_step( 0,'%ecx','%edx','%eax','%ebx', '0','0x265e5a51','14');
	round2_step( 0,'%ebx','%ecx','%edx','%eax', '5','0xe9b6c7aa','20');
	round2_step( 0,'%eax','%ebx','%ecx','%edx','10','0xd62f105d', '5');
	round2_step( 0,'%edx','%eax','%ebx','%ecx','15', '0x2441453', '9');
	round2_step( 0,'%ecx','%edx','%eax','%ebx', '4','0xd8a1e681','14');
	round2_step( 0,'%ebx','%ecx','%edx','%eax', '9','0xe7d3fbc8','20');
	round2_step( 0,'%eax','%ebx','%ecx','%edx','14','0x21e1cde6', '5');
	round2_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xc33707d6', '9');
	round2_step( 0,'%ecx','%edx','%eax','%ebx', '8','0xf4d50d87','14');
	round2_step( 0,'%ebx','%ecx','%edx','%eax','13','0x455a14ed','20');
	round2_step( 0,'%eax','%ebx','%ecx','%edx', '2','0xa9e3e905', '5');
	round2_step( 0,'%edx','%eax','%ebx','%ecx', '7','0xfcefa3f8', '9');
	round2_step( 0,'%ecx','%edx','%eax','%ebx','12','0x676f02d9','14');
	round2_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x8d2a4c8a','20');

	round3_step(-1,'%eax','%ebx','%ecx','%edx', '8','0xfffa3942', '4');
	round3_step( 0,'%edx','%eax','%ebx','%ecx','11','0x8771f681','11');
	round3_step( 0,'%ecx','%edx','%eax','%ebx','14','0x6d9d6122','16');
	round3_step( 0,'%ebx','%ecx','%edx','%eax', '1','0xfde5380c','23');
	round3_step( 0,'%eax','%ebx','%ecx','%edx', '4','0xa4beea44', '4');
	round3_step( 0,'%edx','%eax','%ebx','%ecx', '7','0x4bdecfa9','11');
	round3_step( 0,'%ecx','%edx','%eax','%ebx','10','0xf6bb4b60','16');
	round3_step( 0,'%ebx','%ecx','%edx','%eax','13','0xbebfbc70','23');
	round3_step( 0,'%eax','%ebx','%ecx','%edx', '0','0x289b7ec6', '4');
	round3_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xeaa127fa','11');
	round3_step( 0,'%ecx','%edx','%eax','%ebx', '6','0xd4ef3085','16');
	round3_step( 0,'%ebx','%ecx','%edx','%eax', '9', '0x4881d05','23');
	round3_step( 0,'%eax','%ebx','%ecx','%edx','12','0xd9d4d039', '4');
	round3_step( 0,'%edx','%eax','%ebx','%ecx','15','0xe6db99e5','11');
	round3_step( 0,'%ecx','%edx','%eax','%ebx', '2','0x1fa27cf8','16');
	round3_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xc4ac5665','23');

	round4_step(-1,'%eax','%ebx','%ecx','%edx', '7','0xf4292244', '6');
	round4_step( 0,'%edx','%eax','%ebx','%ecx','14','0x432aff97','10');
	round4_step( 0,'%ecx','%edx','%eax','%ebx', '5','0xab9423a7','15');
	round4_step( 0,'%ebx','%ecx','%edx','%eax','12','0xfc93a039','21');
	round4_step( 0,'%eax','%ebx','%ecx','%edx', '3','0x655b59c3', '6');
	round4_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8f0ccc92','10');
	round4_step( 0,'%ecx','%edx','%eax','%ebx', '1','0xffeff47d','15');
	round4_step( 0,'%ebx','%ecx','%edx','%eax', '8','0x85845dd1','21');
	round4_step( 0,'%eax','%ebx','%ecx','%edx','15','0x6fa87e4f', '6');
	round4_step( 0,'%edx','%eax','%ebx','%ecx', '6','0xfe2ce6e0','10');
	round4_step( 0,'%ecx','%edx','%eax','%ebx','13','0xa3014314','15');
	round4_step( 0,'%ebx','%ecx','%edx','%eax', '4','0x4e0811a1','21');
	round4_step( 0,'%eax','%ebx','%ecx','%edx','11','0xf7537e82', '6');
	round4_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xbd3af235','10');
	round4_step( 0,'%ecx','%edx','%eax','%ebx', '9','0x2ad7d2bb','15');
	round4_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xeb86d391','21');
	$code .= <<EOF;
	# add old values of A, B, C, D
	add %r8d, %eax
	add %r9d, %ebx
	add %r14d, %ecx
	add %r15d, %edx

	# loop control
	add \$64, %rsi # ptr += 64
	cmp %rdi, %rsi # cmp end with ptr
	jb .Lloop # jmp if ptr < end
	# END of loop over 16-word blocks

	.Lend:
	mov %eax, 0*4(%rbp) # ctx->A = A
	mov %ebx, 1*4(%rbp) # ctx->B = B
	mov %ecx, 2*4(%rbp) # ctx->C = C
	mov %edx, 3*4(%rbp) # ctx->D = D

	mov (%rsp),%r15
	.cfi_restore r15
	mov 8(%rsp),%r14
	.cfi_restore r14
	mov 16(%rsp),%r12
	.cfi_restore r12
	mov 24(%rsp),%rbx
	.cfi_restore rbx
	mov 32(%rsp),%rbp
	.cfi_restore rbp
	add \$40,%rsp
	.cfi_adjust_cfa_offset -40
	.Lepilogue:
	ret
	.cfi_endproc
	.size md5_block_asm_data_order,.-md5_block_asm_data_order
	EOF

	# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
	# CONTEXT context,DISPATCHER_CONTEXT disp)
	if ($win64) {
	my $rec="%rcx";
	my $frame="%rdx";
	my $context="%r8";
	my $disp="%r9";

	$code.=<<___;
	.extern __imp_RtlVirtualUnwind
	.type se_handler,\@abi-omnipotent
	.align 16
	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

	lea .Lprologue(%rip),%r10
	cmp %r10,%rbx # context->Rip<.Lprologue
	jb .Lin_prologue

	mov 152($context),%rax # pull context->Rsp

	lea .Lepilogue(%rip),%r10
	cmp %r10,%rbx # context->Rip>=.Lepilogue
	jae .Lin_prologue

	lea 40(%rax),%rax

	mov -8(%rax),%rbp
	mov -16(%rax),%rbx
	mov -24(%rax),%r12
	mov -32(%rax),%r14
	mov -40(%rax),%r15
	mov %rbx,144($context) # restore context->Rbx
	mov %rbp,160($context) # restore context->Rbp
	mov %r12,216($context) # restore context->R12
	mov %r14,232($context) # restore context->R14
	mov %r15,240($context) # restore context->R15

	.Lin_prologue:
	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 se_handler,.-se_handler

	.section .pdata
	.align 4
	.rva .LSEH_begin_md5_block_asm_data_order
	.rva .LSEH_end_md5_block_asm_data_order
	.rva .LSEH_info_md5_block_asm_data_order

	.section .xdata
	.align 8
	.LSEH_info_md5_block_asm_data_order:
	.byte 9,0,0,0
	.rva se_handler
	___
	}

	print $code;

	close STDOUT or die "error closing STDOUT";