crypto/sha/asm/sha512-x86_64.pl - platform/external/openssl - Git at Google

 #!/usr/bin/env perl
 #
 # ====================================================================
 # Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
 # project. Rights for redistribution and usage in source and binary
 # forms are granted according to the OpenSSL license.
 # ====================================================================
 #
 # sha256/512_block procedure for x86_64.
 #
 # 40% improvement over compiler-generated code on Opteron. On EM64T
 # sha256 was observed to run >80% faster and sha512 - >40%. No magical
 # tricks, just straight implementation... I really wonder why gcc
 # [being armed with inline assembler] fails to generate as fast code.
 # The only thing which is cool about this module is that it's very
 # same instruction sequence used for both SHA-256 and SHA-512. In
 # former case the instructions operate on 32-bit operands, while in
 # latter - on 64-bit ones. All I had to do is to get one flavor right,
 # the other one passed the test right away:-)
 #
 # sha256_block runs in ~1005 cycles on Opteron, which gives you
 # asymptotic performance of 64*1000/1005=63.7MBps times CPU clock
 # frequency in GHz. sha512_block runs in ~1275 cycles, which results
 # in 128*1000/1275=100MBps per GHz. Is there room for improvement?
 # Well, if you compare it to IA-64 implementation, which maintains
 # X[16] in register bank[!], tends to 4 instructions per CPU clock
 # cycle and runs in 1003 cycles, 1275 is very good result for 3-way
 # issue Opteron pipeline and X[16] maintained in memory. So that *if*
 # there is a way to improve it, *then* the only way would be to try to
 # offload X[16] updates to SSE unit, but that would require "deeper"
 # loop unroll, which in turn would naturally cause size blow-up, not
 # to mention increased complexity! And once again, only *if* it's
 # actually possible to noticeably improve overall ILP, instruction
 # level parallelism, on a given CPU implementation in this case.
 #
 # Special note on Intel EM64T. While Opteron CPU exhibits perfect
 # perfromance ratio of 1.5 between 64- and 32-bit flavors [see above],
 # [currently available] EM64T CPUs apparently are far from it. On the
 # contrary, 64-bit version, sha512_block, is ~30% *slower* than 32-bit
 # sha256_block:-( This is presumably because 64-bit shifts/rotates
 # apparently are not atomic instructions, but implemented in microcode.

 $flavour = shift;
 $output  = shift;
 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }

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

 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
 die "can't locate x86_64-xlate.pl";

 open STDOUT,"| $^X $xlate $flavour $output";

 if ($output =~ /512/) {
 	$func="sha512_block_data_order";
 	$TABLE="K512";
 	$SZ=8;
 	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
 					"%r8", "%r9", "%r10","%r11");
 	($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
 	@Sigma0=(28,34,39);
 	@Sigma1=(14,18,41);
 	@sigma0=(1,  8, 7);
 	@sigma1=(19,61, 6);
 	$rounds=80;
 } else {
 	$func="sha256_block_data_order";
 	$TABLE="K256";
 	$SZ=4;
 	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
 					"%r8d","%r9d","%r10d","%r11d");
 	($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
 	@Sigma0=( 2,13,22);
 	@Sigma1=( 6,11,25);
 	@sigma0=( 7,18, 3);
 	@sigma1=(17,19,10);
 	$rounds=64;
 }

 $ctx="%rdi";	# 1st arg
 $round="%rdi";	# zaps $ctx
 $inp="%rsi";	# 2nd arg
 $Tbl="%rbp";

 $_ctx="16*$SZ+0*8(%rsp)";
 $_inp="16*$SZ+1*8(%rsp)";
 $_end="16*$SZ+2*8(%rsp)";
 $_rsp="16*$SZ+3*8(%rsp)";
 $framesz="16*$SZ+4*8";


 sub ROUND_00_15()
 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;

 $code.=<<___;
 	ror	\$`$Sigma1[2]-$Sigma1[1]`,$a0
 	mov	$f,$a2
 	mov	$T1,`$SZ*($i&0xf)`(%rsp)

 	ror	\$`$Sigma0[2]-$Sigma0[1]`,$a1
 	xor	$e,$a0
 	xor	$g,$a2			# f^g

 	ror	\$`$Sigma1[1]-$Sigma1[0]`,$a0
 	add	$h,$T1			# T1+=h
 	xor	$a,$a1

 	add	($Tbl,$round,$SZ),$T1	# T1+=K[round]
 	and	$e,$a2			# (f^g)&e
 	mov	$b,$h

 	ror	\$`$Sigma0[1]-$Sigma0[0]`,$a1
 	xor	$e,$a0
 	xor	$g,$a2			# Ch(e,f,g)=((f^g)&e)^g

 	xor	$c,$h			# b^c
 	xor	$a,$a1
 	add	$a2,$T1			# T1+=Ch(e,f,g)
 	mov	$b,$a2

 	ror	\$$Sigma1[0],$a0	# Sigma1(e)
 	and	$a,$h			# h=(b^c)&a
 	and	$c,$a2			# b&c

 	ror	\$$Sigma0[0],$a1	# Sigma0(a)
 	add	$a0,$T1			# T1+=Sigma1(e)
 	add	$a2,$h			# h+=b&c (completes +=Maj(a,b,c)

 	add	$T1,$d			# d+=T1
 	add	$T1,$h			# h+=T1
 	lea	1($round),$round	# round++
 	add	$a1,$h			# h+=Sigma0(a)

 ___
 }

 sub ROUND_16_XX()
 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;

 $code.=<<___;
 	mov	`$SZ*(($i+1)&0xf)`(%rsp),$a0
 	mov	`$SZ*(($i+14)&0xf)`(%rsp),$a1
 	mov	$a0,$T1
 	mov	$a1,$a2

 	ror	\$`$sigma0[1]-$sigma0[0]`,$T1
 	xor	$a0,$T1
 	shr	\$$sigma0[2],$a0

 	ror	\$$sigma0[0],$T1
 	xor	$T1,$a0			# sigma0(X[(i+1)&0xf])
 	mov	`$SZ*(($i+9)&0xf)`(%rsp),$T1

 	ror	\$`$sigma1[1]-$sigma1[0]`,$a2
 	xor	$a1,$a2
 	shr	\$$sigma1[2],$a1

 	ror	\$$sigma1[0],$a2
 	add	$a0,$T1
 	xor	$a2,$a1			# sigma1(X[(i+14)&0xf])

 	add	`$SZ*($i&0xf)`(%rsp),$T1
 	mov	$e,$a0
 	add	$a1,$T1
 	mov	$a,$a1
 ___
 	&ROUND_00_15(@_);
 }

 $code=<<___;
 .text

 .globl	$func
 .type	$func,\@function,4
 .align	16
 $func:
 	push	%rbx
 	push	%rbp
 	push	%r12
 	push	%r13
 	push	%r14
 	push	%r15
 	mov	%rsp,%r11		# copy %rsp
 	shl	\$4,%rdx		# num*16
 	sub	\$$framesz,%rsp
 	lea	($inp,%rdx,$SZ),%rdx	# inp+num*16*$SZ
 	and	\$-64,%rsp		# align stack frame
 	mov	$ctx,$_ctx		# save ctx, 1st arg
 	mov	$inp,$_inp		# save inp, 2nd arh
 	mov	%rdx,$_end		# save end pointer, "3rd" arg
 	mov	%r11,$_rsp		# save copy of %rsp
 .Lprologue:

 	lea	$TABLE(%rip),$Tbl

 	mov	$SZ*0($ctx),$A
 	mov	$SZ*1($ctx),$B
 	mov	$SZ*2($ctx),$C
 	mov	$SZ*3($ctx),$D
 	mov	$SZ*4($ctx),$E
 	mov	$SZ*5($ctx),$F
 	mov	$SZ*6($ctx),$G
 	mov	$SZ*7($ctx),$H
 	jmp	.Lloop

 .align	16
 .Lloop:
 	xor	$round,$round
 ___
 	for($i=0;$i<16;$i++) {
 		$code.="	mov	$SZ*$i($inp),$T1\n";
 		$code.="	mov	@ROT[4],$a0\n";
 		$code.="	mov	@ROT[0],$a1\n";
 		$code.="	bswap	$T1\n";
 		&ROUND_00_15($i,@ROT);
 		unshift(@ROT,pop(@ROT));
 	}
 $code.=<<___;
 	jmp	.Lrounds_16_xx
 .align	16
 .Lrounds_16_xx:
 ___
 	for(;$i<32;$i++) {
 		&ROUND_16_XX($i,@ROT);
 		unshift(@ROT,pop(@ROT));
 	}

 $code.=<<___;
 	cmp	\$$rounds,$round
 	jb	.Lrounds_16_xx

 	mov	$_ctx,$ctx
 	lea	16*$SZ($inp),$inp

 	add	$SZ*0($ctx),$A
 	add	$SZ*1($ctx),$B
 	add	$SZ*2($ctx),$C
 	add	$SZ*3($ctx),$D
 	add	$SZ*4($ctx),$E
 	add	$SZ*5($ctx),$F
 	add	$SZ*6($ctx),$G
 	add	$SZ*7($ctx),$H

 	cmp	$_end,$inp

 	mov	$A,$SZ*0($ctx)
 	mov	$B,$SZ*1($ctx)
 	mov	$C,$SZ*2($ctx)
 	mov	$D,$SZ*3($ctx)
 	mov	$E,$SZ*4($ctx)
 	mov	$F,$SZ*5($ctx)
 	mov	$G,$SZ*6($ctx)
 	mov	$H,$SZ*7($ctx)
 	jb	.Lloop

 	mov	$_rsp,%rsi
 	mov	(%rsi),%r15
 	mov	8(%rsi),%r14
 	mov	16(%rsi),%r13
 	mov	24(%rsi),%r12
 	mov	32(%rsi),%rbp
 	mov	40(%rsi),%rbx
 	lea	48(%rsi),%rsp
 .Lepilogue:
 	ret
 .size	$func,.-$func
 ___

 if ($SZ==4) {
 $code.=<<___;
 .align	64
 .type	$TABLE,\@object
 $TABLE:
 	.long	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 	.long	0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 	.long	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 	.long	0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 	.long	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 	.long	0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 	.long	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 	.long	0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 	.long	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 	.long	0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 	.long	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 	.long	0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 	.long	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 	.long	0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 	.long	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 	.long	0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 ___
 } else {
 $code.=<<___;
 .align	64
 .type	$TABLE,\@object
 $TABLE:
 	.quad	0x428a2f98d728ae22,0x7137449123ef65cd
 	.quad	0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 	.quad	0x3956c25bf348b538,0x59f111f1b605d019
 	.quad	0x923f82a4af194f9b,0xab1c5ed5da6d8118
 	.quad	0xd807aa98a3030242,0x12835b0145706fbe
 	.quad	0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 	.quad	0x72be5d74f27b896f,0x80deb1fe3b1696b1
 	.quad	0x9bdc06a725c71235,0xc19bf174cf692694
 	.quad	0xe49b69c19ef14ad2,0xefbe4786384f25e3
 	.quad	0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 	.quad	0x2de92c6f592b0275,0x4a7484aa6ea6e483
 	.quad	0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 	.quad	0x983e5152ee66dfab,0xa831c66d2db43210
 	.quad	0xb00327c898fb213f,0xbf597fc7beef0ee4
 	.quad	0xc6e00bf33da88fc2,0xd5a79147930aa725
 	.quad	0x06ca6351e003826f,0x142929670a0e6e70
 	.quad	0x27b70a8546d22ffc,0x2e1b21385c26c926
 	.quad	0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 	.quad	0x650a73548baf63de,0x766a0abb3c77b2a8
 	.quad	0x81c2c92e47edaee6,0x92722c851482353b
 	.quad	0xa2bfe8a14cf10364,0xa81a664bbc423001
 	.quad	0xc24b8b70d0f89791,0xc76c51a30654be30
 	.quad	0xd192e819d6ef5218,0xd69906245565a910
 	.quad	0xf40e35855771202a,0x106aa07032bbd1b8
 	.quad	0x19a4c116b8d2d0c8,0x1e376c085141ab53
 	.quad	0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 	.quad	0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 	.quad	0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 	.quad	0x748f82ee5defb2fc,0x78a5636f43172f60
 	.quad	0x84c87814a1f0ab72,0x8cc702081a6439ec
 	.quad	0x90befffa23631e28,0xa4506cebde82bde9
 	.quad	0xbef9a3f7b2c67915,0xc67178f2e372532b
 	.quad	0xca273eceea26619c,0xd186b8c721c0c207
 	.quad	0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 	.quad	0x06f067aa72176fba,0x0a637dc5a2c898a6
 	.quad	0x113f9804bef90dae,0x1b710b35131c471b
 	.quad	0x28db77f523047d84,0x32caab7b40c72493
 	.quad	0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 	.quad	0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 	.quad	0x5fcb6fab3ad6faec,0x6c44198c4a475817
 ___
 }

 # 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	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

 	mov	16*$SZ+3*8(%rax),%rax	# pull $_rsp
 	lea	48(%rax),%rax

 	mov	-8(%rax),%rbx
 	mov	-16(%rax),%rbp
 	mov	-24(%rax),%r12
 	mov	-32(%rax),%r13
 	mov	-40(%rax),%r14
 	mov	-48(%rax),%r15
 	mov	%rbx,144($context)	# restore context->Rbx
 	mov	%rbp,160($context)	# restore context->Rbp
 	mov	%r12,216($context)	# restore context->R12
 	mov	%r13,224($context)	# restore context->R13
 	mov	%r14,232($context)	# restore context->R14
 	mov	%r15,240($context)	# restore context->R15

 .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_$func
 	.rva	.LSEH_end_$func
 	.rva	.LSEH_info_$func

 .section	.xdata
 .align	8
 .LSEH_info_$func:
 	.byte	9,0,0,0
 	.rva	se_handler
 ___
 }

 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 print $code;
 close STDOUT;
	#!/usr/bin/env perl
	#
	# ====================================================================
	# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
	# project. Rights for redistribution and usage in source and binary
	# forms are granted according to the OpenSSL license.
	# ====================================================================
	#
	# sha256/512_block procedure for x86_64.
	#
	# 40% improvement over compiler-generated code on Opteron. On EM64T
	# sha256 was observed to run >80% faster and sha512 - >40%. No magical
	# tricks, just straight implementation... I really wonder why gcc
	# [being armed with inline assembler] fails to generate as fast code.
	# The only thing which is cool about this module is that it's very
	# same instruction sequence used for both SHA-256 and SHA-512. In
	# former case the instructions operate on 32-bit operands, while in
	# latter - on 64-bit ones. All I had to do is to get one flavor right,
	# the other one passed the test right away:-)
	#
	# sha256_block runs in ~1005 cycles on Opteron, which gives you
	# asymptotic performance of 64*1000/1005=63.7MBps times CPU clock
	# frequency in GHz. sha512_block runs in ~1275 cycles, which results
	# in 128*1000/1275=100MBps per GHz. Is there room for improvement?
	# Well, if you compare it to IA-64 implementation, which maintains
	# X[16] in register bank[!], tends to 4 instructions per CPU clock
	# cycle and runs in 1003 cycles, 1275 is very good result for 3-way
	# issue Opteron pipeline and X[16] maintained in memory. So that if
	# there is a way to improve it, then the only way would be to try to
	# offload X[16] updates to SSE unit, but that would require "deeper"
	# loop unroll, which in turn would naturally cause size blow-up, not
	# to mention increased complexity! And once again, only if it's
	# actually possible to noticeably improve overall ILP, instruction
	# level parallelism, on a given CPU implementation in this case.
	#
	# Special note on Intel EM64T. While Opteron CPU exhibits perfect
	# perfromance ratio of 1.5 between 64- and 32-bit flavors [see above],
	# [currently available] EM64T CPUs apparently are far from it. On the
	# contrary, 64-bit version, sha512_block, is ~30% slower than 32-bit
	# sha256_block:-( This is presumably because 64-bit shifts/rotates
	# apparently are not atomic instructions, but implemented in microcode.

	$flavour = shift;
	$output = shift;
	if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }

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

	$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
	( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
	( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
	die "can't locate x86_64-xlate.pl";

	open STDOUT,"\| $^X $xlate $flavour $output";

	if ($output =~ /512/) {
	$func="sha512_block_data_order";
	$TABLE="K512";
	$SZ=8;
	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
	"%r8", "%r9", "%r10","%r11");
	($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
	@Sigma0=(28,34,39);
	@Sigma1=(14,18,41);
	@sigma0=(1, 8, 7);
	@sigma1=(19,61, 6);
	$rounds=80;
	} else {
	$func="sha256_block_data_order";
	$TABLE="K256";
	$SZ=4;
	@ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
	"%r8d","%r9d","%r10d","%r11d");
	($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
	@Sigma0=( 2,13,22);
	@Sigma1=( 6,11,25);
	@sigma0=( 7,18, 3);
	@sigma1=(17,19,10);
	$rounds=64;
	}

	$ctx="%rdi"; # 1st arg
	$round="%rdi"; # zaps $ctx
	$inp="%rsi"; # 2nd arg
	$Tbl="%rbp";

	$_ctx="16$SZ+08(%rsp)";
	$_inp="16$SZ+18(%rsp)";
	$_end="16$SZ+28(%rsp)";
	$_rsp="16$SZ+38(%rsp)";
	$framesz="16$SZ+48";


	sub ROUND_00_15()
	{ my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;

	$code.=<<___;
	ror \$`$Sigma1[2]-$Sigma1[1]`,$a0
	mov $f,$a2
	mov $T1,`$SZ*($i&0xf)`(%rsp)

	ror \$`$Sigma0[2]-$Sigma0[1]`,$a1
	xor $e,$a0
	xor $g,$a2 # f^g

	ror \$`$Sigma1[1]-$Sigma1[0]`,$a0
	add $h,$T1 # T1+=h
	xor $a,$a1

	add ($Tbl,$round,$SZ),$T1 # T1+=K[round]
	and $e,$a2 # (f^g)&e
	mov $b,$h

	ror \$`$Sigma0[1]-$Sigma0[0]`,$a1
	xor $e,$a0
	xor $g,$a2 # Ch(e,f,g)=((f^g)&e)^g

	xor $c,$h # b^c
	xor $a,$a1
	add $a2,$T1 # T1+=Ch(e,f,g)
	mov $b,$a2

	ror \$$Sigma1[0],$a0 # Sigma1(e)
	and $a,$h # h=(b^c)&a
	and $c,$a2 # b&c

	ror \$$Sigma0[0],$a1 # Sigma0(a)
	add $a0,$T1 # T1+=Sigma1(e)
	add $a2,$h # h+=b&c (completes +=Maj(a,b,c)

	add $T1,$d # d+=T1
	add $T1,$h # h+=T1
	lea 1($round),$round # round++
	add $a1,$h # h+=Sigma0(a)

	___
	}

	sub ROUND_16_XX()
	{ my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;

	$code.=<<___;
	mov `$SZ*(($i+1)&0xf)`(%rsp),$a0
	mov `$SZ*(($i+14)&0xf)`(%rsp),$a1
	mov $a0,$T1
	mov $a1,$a2

	ror \$`$sigma0[1]-$sigma0[0]`,$T1
	xor $a0,$T1
	shr \$$sigma0[2],$a0

	ror \$$sigma0[0],$T1
	xor $T1,$a0 # sigma0(X[(i+1)&0xf])
	mov `$SZ*(($i+9)&0xf)`(%rsp),$T1

	ror \$`$sigma1[1]-$sigma1[0]`,$a2
	xor $a1,$a2
	shr \$$sigma1[2],$a1

	ror \$$sigma1[0],$a2
	add $a0,$T1
	xor $a2,$a1 # sigma1(X[(i+14)&0xf])

	add `$SZ*($i&0xf)`(%rsp),$T1
	mov $e,$a0
	add $a1,$T1
	mov $a,$a1
	___
	&ROUND_00_15(@_);
	}

	$code=<<___;
	.text

	.globl $func
	.type $func,\@function,4
	.align 16
	$func:
	push %rbx
	push %rbp
	push %r12
	push %r13
	push %r14
	push %r15
	mov %rsp,%r11 # copy %rsp
	shl \$4,%rdx # num*16
	sub \$$framesz,%rsp
	lea ($inp,%rdx,$SZ),%rdx # inp+num16$SZ
	and \$-64,%rsp # align stack frame
	mov $ctx,$_ctx # save ctx, 1st arg
	mov $inp,$_inp # save inp, 2nd arh
	mov %rdx,$_end # save end pointer, "3rd" arg
	mov %r11,$_rsp # save copy of %rsp
	.Lprologue:

	lea $TABLE(%rip),$Tbl

	mov $SZ*0($ctx),$A
	mov $SZ*1($ctx),$B
	mov $SZ*2($ctx),$C
	mov $SZ*3($ctx),$D
	mov $SZ*4($ctx),$E
	mov $SZ*5($ctx),$F
	mov $SZ*6($ctx),$G
	mov $SZ*7($ctx),$H
	jmp .Lloop

	.align 16
	.Lloop:
	xor $round,$round
	___
	for($i=0;$i<16;$i++) {
	$code.=" mov $SZ*$i($inp),$T1\n";
	$code.=" mov @ROT[4],$a0\n";
	$code.=" mov @ROT[0],$a1\n";
	$code.=" bswap $T1\n";
	&ROUND_00_15($i,@ROT);
	unshift(@ROT,pop(@ROT));
	}
	$code.=<<___;
	jmp .Lrounds_16_xx
	.align 16
	.Lrounds_16_xx:
	___
	for(;$i<32;$i++) {
	&ROUND_16_XX($i,@ROT);
	unshift(@ROT,pop(@ROT));
	}

	$code.=<<___;
	cmp \$$rounds,$round
	jb .Lrounds_16_xx

	mov $_ctx,$ctx
	lea 16*$SZ($inp),$inp

	add $SZ*0($ctx),$A
	add $SZ*1($ctx),$B
	add $SZ*2($ctx),$C
	add $SZ*3($ctx),$D
	add $SZ*4($ctx),$E
	add $SZ*5($ctx),$F
	add $SZ*6($ctx),$G
	add $SZ*7($ctx),$H

	cmp $_end,$inp

	mov $A,$SZ*0($ctx)
	mov $B,$SZ*1($ctx)
	mov $C,$SZ*2($ctx)
	mov $D,$SZ*3($ctx)
	mov $E,$SZ*4($ctx)
	mov $F,$SZ*5($ctx)
	mov $G,$SZ*6($ctx)
	mov $H,$SZ*7($ctx)
	jb .Lloop

	mov $_rsp,%rsi
	mov (%rsi),%r15
	mov 8(%rsi),%r14
	mov 16(%rsi),%r13
	mov 24(%rsi),%r12
	mov 32(%rsi),%rbp
	mov 40(%rsi),%rbx
	lea 48(%rsi),%rsp
	.Lepilogue:
	ret
	.size $func,.-$func
	___

	if ($SZ==4) {
	$code.=<<___;
	.align 64
	.type $TABLE,\@object
	$TABLE:
	.long 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
	.long 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
	.long 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
	.long 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
	.long 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
	.long 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
	.long 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
	.long 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
	.long 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
	.long 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
	.long 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
	.long 0xd192e819,0xd6990624,0xf40e3585,0x106aa070
	.long 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
	.long 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
	.long 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
	.long 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
	___
	} else {
	$code.=<<___;
	.align 64
	.type $TABLE,\@object
	$TABLE:
	.quad 0x428a2f98d728ae22,0x7137449123ef65cd
	.quad 0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
	.quad 0x3956c25bf348b538,0x59f111f1b605d019
	.quad 0x923f82a4af194f9b,0xab1c5ed5da6d8118
	.quad 0xd807aa98a3030242,0x12835b0145706fbe
	.quad 0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
	.quad 0x72be5d74f27b896f,0x80deb1fe3b1696b1
	.quad 0x9bdc06a725c71235,0xc19bf174cf692694
	.quad 0xe49b69c19ef14ad2,0xefbe4786384f25e3
	.quad 0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
	.quad 0x2de92c6f592b0275,0x4a7484aa6ea6e483
	.quad 0x5cb0a9dcbd41fbd4,0x76f988da831153b5
	.quad 0x983e5152ee66dfab,0xa831c66d2db43210
	.quad 0xb00327c898fb213f,0xbf597fc7beef0ee4
	.quad 0xc6e00bf33da88fc2,0xd5a79147930aa725
	.quad 0x06ca6351e003826f,0x142929670a0e6e70
	.quad 0x27b70a8546d22ffc,0x2e1b21385c26c926
	.quad 0x4d2c6dfc5ac42aed,0x53380d139d95b3df
	.quad 0x650a73548baf63de,0x766a0abb3c77b2a8
	.quad 0x81c2c92e47edaee6,0x92722c851482353b
	.quad 0xa2bfe8a14cf10364,0xa81a664bbc423001
	.quad 0xc24b8b70d0f89791,0xc76c51a30654be30
	.quad 0xd192e819d6ef5218,0xd69906245565a910
	.quad 0xf40e35855771202a,0x106aa07032bbd1b8
	.quad 0x19a4c116b8d2d0c8,0x1e376c085141ab53
	.quad 0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
	.quad 0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
	.quad 0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
	.quad 0x748f82ee5defb2fc,0x78a5636f43172f60
	.quad 0x84c87814a1f0ab72,0x8cc702081a6439ec
	.quad 0x90befffa23631e28,0xa4506cebde82bde9
	.quad 0xbef9a3f7b2c67915,0xc67178f2e372532b
	.quad 0xca273eceea26619c,0xd186b8c721c0c207
	.quad 0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
	.quad 0x06f067aa72176fba,0x0a637dc5a2c898a6
	.quad 0x113f9804bef90dae,0x1b710b35131c471b
	.quad 0x28db77f523047d84,0x32caab7b40c72493
	.quad 0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
	.quad 0x4cc5d4becb3e42b6,0x597f299cfc657e2a
	.quad 0x5fcb6fab3ad6faec,0x6c44198c4a475817
	___
	}

	# 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 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

	mov 16$SZ+38(%rax),%rax # pull $_rsp
	lea 48(%rax),%rax

	mov -8(%rax),%rbx
	mov -16(%rax),%rbp
	mov -24(%rax),%r12
	mov -32(%rax),%r13
	mov -40(%rax),%r14
	mov -48(%rax),%r15
	mov %rbx,144($context) # restore context->Rbx
	mov %rbp,160($context) # restore context->Rbp
	mov %r12,216($context) # restore context->R12
	mov %r13,224($context) # restore context->R13
	mov %r14,232($context) # restore context->R14
	mov %r15,240($context) # restore context->R15

	.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_$func
	.rva .LSEH_end_$func
	.rva .LSEH_info_$func

	.section .xdata
	.align 8
	.LSEH_info_$func:
	.byte 9,0,0,0
	.rva se_handler
	___
	}

	$code =~ s/\`([^\`]*)\`/eval $1/gem;
	print $code;
	close STDOUT;