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1#!/usr/bin/env perl
2#
3# ====================================================================
4# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
5# project. The module is, however, dual licensed under OpenSSL and
6# CRYPTOGAMS licenses depending on where you obtain it. For further
7# details see http://www.openssl.org/~appro/cryptogams/.
8# ====================================================================
9#
10# March, June 2010
11#
12# The module implements "4-bit" GCM GHASH function and underlying
13# single multiplication operation in GF(2^128). "4-bit" means that
14# it uses 256 bytes per-key table [+128 bytes shared table]. GHASH
15# function features so called "528B" variant utilizing additional
16# 256+16 bytes of per-key storage [+512 bytes shared table].
17# Performance results are for this streamed GHASH subroutine and are
18# expressed in cycles per processed byte, less is better:
19#
20#		gcc 3.4.x(*)	assembler
21#
22# P4		28.6		14.0		+100%
23# Opteron	19.3		7.7		+150%
24# Core2		17.8		8.1(**)		+120%
25#
26# (*)	comparison is not completely fair, because C results are
27#	for vanilla "256B" implementation, while assembler results
28#	are for "528B";-)
29# (**)	it's mystery [to me] why Core2 result is not same as for
30#	Opteron;
31
32# May 2010
33#
34# Add PCLMULQDQ version performing at 2.02 cycles per processed byte.
35# See ghash-x86.pl for background information and details about coding
36# techniques.
37#
38# Special thanks to David Woodhouse <dwmw2@infradead.org> for
39# providing access to a Westmere-based system on behalf of Intel
40# Open Source Technology Centre.
41
42$flavour = shift;
43$output  = shift;
44if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
45
46$win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
47
48$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
49( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
50( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
51die "can't locate x86_64-xlate.pl";
52
53open STDOUT,"| $^X $xlate $flavour $output";
54
55# common register layout
56$nlo="%rax";
57$nhi="%rbx";
58$Zlo="%r8";
59$Zhi="%r9";
60$tmp="%r10";
61$rem_4bit = "%r11";
62
63$Xi="%rdi";
64$Htbl="%rsi";
65
66# per-function register layout
67$cnt="%rcx";
68$rem="%rdx";
69
70sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/	or
71			$r =~ s/%[er]([sd]i)/%\1l/	or
72			$r =~ s/%[er](bp)/%\1l/		or
73			$r =~ s/%(r[0-9]+)[d]?/%\1b/;   $r; }
74
75sub AUTOLOAD()		# thunk [simplified] 32-bit style perlasm
76{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
77  my $arg = pop;
78    $arg = "\$$arg" if ($arg*1 eq $arg);
79    $code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
80}
81
82{ my $N;
83  sub loop() {
84  my $inp = shift;
85
86	$N++;
87$code.=<<___;
88	xor	$nlo,$nlo
89	xor	$nhi,$nhi
90	mov	`&LB("$Zlo")`,`&LB("$nlo")`
91	mov	`&LB("$Zlo")`,`&LB("$nhi")`
92	shl	\$4,`&LB("$nlo")`
93	mov	\$14,$cnt
94	mov	8($Htbl,$nlo),$Zlo
95	mov	($Htbl,$nlo),$Zhi
96	and	\$0xf0,`&LB("$nhi")`
97	mov	$Zlo,$rem
98	jmp	.Loop$N
99
100.align	16
101.Loop$N:
102	shr	\$4,$Zlo
103	and	\$0xf,$rem
104	mov	$Zhi,$tmp
105	mov	($inp,$cnt),`&LB("$nlo")`
106	shr	\$4,$Zhi
107	xor	8($Htbl,$nhi),$Zlo
108	shl	\$60,$tmp
109	xor	($Htbl,$nhi),$Zhi
110	mov	`&LB("$nlo")`,`&LB("$nhi")`
111	xor	($rem_4bit,$rem,8),$Zhi
112	mov	$Zlo,$rem
113	shl	\$4,`&LB("$nlo")`
114	xor	$tmp,$Zlo
115	dec	$cnt
116	js	.Lbreak$N
117
118	shr	\$4,$Zlo
119	and	\$0xf,$rem
120	mov	$Zhi,$tmp
121	shr	\$4,$Zhi
122	xor	8($Htbl,$nlo),$Zlo
123	shl	\$60,$tmp
124	xor	($Htbl,$nlo),$Zhi
125	and	\$0xf0,`&LB("$nhi")`
126	xor	($rem_4bit,$rem,8),$Zhi
127	mov	$Zlo,$rem
128	xor	$tmp,$Zlo
129	jmp	.Loop$N
130
131.align	16
132.Lbreak$N:
133	shr	\$4,$Zlo
134	and	\$0xf,$rem
135	mov	$Zhi,$tmp
136	shr	\$4,$Zhi
137	xor	8($Htbl,$nlo),$Zlo
138	shl	\$60,$tmp
139	xor	($Htbl,$nlo),$Zhi
140	and	\$0xf0,`&LB("$nhi")`
141	xor	($rem_4bit,$rem,8),$Zhi
142	mov	$Zlo,$rem
143	xor	$tmp,$Zlo
144
145	shr	\$4,$Zlo
146	and	\$0xf,$rem
147	mov	$Zhi,$tmp
148	shr	\$4,$Zhi
149	xor	8($Htbl,$nhi),$Zlo
150	shl	\$60,$tmp
151	xor	($Htbl,$nhi),$Zhi
152	xor	$tmp,$Zlo
153	xor	($rem_4bit,$rem,8),$Zhi
154
155	bswap	$Zlo
156	bswap	$Zhi
157___
158}}
159
160$code=<<___;
161.text
162
163.globl	gcm_gmult_4bit
164.type	gcm_gmult_4bit,\@function,2
165.align	16
166gcm_gmult_4bit:
167	push	%rbx
168	push	%rbp		# %rbp and %r12 are pushed exclusively in
169	push	%r12		# order to reuse Win64 exception handler...
170.Lgmult_prologue:
171
172	movzb	15($Xi),$Zlo
173	lea	.Lrem_4bit(%rip),$rem_4bit
174___
175	&loop	($Xi);
176$code.=<<___;
177	mov	$Zlo,8($Xi)
178	mov	$Zhi,($Xi)
179
180	mov	16(%rsp),%rbx
181	lea	24(%rsp),%rsp
182.Lgmult_epilogue:
183	ret
184.size	gcm_gmult_4bit,.-gcm_gmult_4bit
185___
186
187# per-function register layout
188$inp="%rdx";
189$len="%rcx";
190$rem_8bit=$rem_4bit;
191
192$code.=<<___;
193.globl	gcm_ghash_4bit
194.type	gcm_ghash_4bit,\@function,4
195.align	16
196gcm_ghash_4bit:
197	push	%rbx
198	push	%rbp
199	push	%r12
200	push	%r13
201	push	%r14
202	push	%r15
203	sub	\$280,%rsp
204.Lghash_prologue:
205	mov	$inp,%r14		# reassign couple of args
206	mov	$len,%r15
207___
208{ my $inp="%r14";
209  my $dat="%edx";
210  my $len="%r15";
211  my @nhi=("%ebx","%ecx");
212  my @rem=("%r12","%r13");
213  my $Hshr4="%rbp";
214
215	&sub	($Htbl,-128);		# size optimization
216	&lea	($Hshr4,"16+128(%rsp)");
217	{ my @lo =($nlo,$nhi);
218          my @hi =($Zlo,$Zhi);
219
220	  &xor	($dat,$dat);
221	  for ($i=0,$j=-2;$i<18;$i++,$j++) {
222	    &mov	("$j(%rsp)",&LB($dat))		if ($i>1);
223	    &or		($lo[0],$tmp)			if ($i>1);
224	    &mov	(&LB($dat),&LB($lo[1]))		if ($i>0 && $i<17);
225	    &shr	($lo[1],4)			if ($i>0 && $i<17);
226	    &mov	($tmp,$hi[1])			if ($i>0 && $i<17);
227	    &shr	($hi[1],4)			if ($i>0 && $i<17);
228	    &mov	("8*$j($Hshr4)",$hi[0])		if ($i>1);
229	    &mov	($hi[0],"16*$i+0-128($Htbl)")	if ($i<16);
230	    &shl	(&LB($dat),4)			if ($i>0 && $i<17);
231	    &mov	("8*$j-128($Hshr4)",$lo[0])	if ($i>1);
232	    &mov	($lo[0],"16*$i+8-128($Htbl)")	if ($i<16);
233	    &shl	($tmp,60)			if ($i>0 && $i<17);
234
235	    push	(@lo,shift(@lo));
236	    push	(@hi,shift(@hi));
237	  }
238	}
239	&add	($Htbl,-128);
240	&mov	($Zlo,"8($Xi)");
241	&mov	($Zhi,"0($Xi)");
242	&add	($len,$inp);		# pointer to the end of data
243	&lea	($rem_8bit,".Lrem_8bit(%rip)");
244	&jmp	(".Louter_loop");
245
246$code.=".align	16\n.Louter_loop:\n";
247	&xor	($Zhi,"($inp)");
248	&mov	("%rdx","8($inp)");
249	&lea	($inp,"16($inp)");
250	&xor	("%rdx",$Zlo);
251	&mov	("($Xi)",$Zhi);
252	&mov	("8($Xi)","%rdx");
253	&shr	("%rdx",32);
254
255	&xor	($nlo,$nlo);
256	&rol	($dat,8);
257	&mov	(&LB($nlo),&LB($dat));
258	&movz	($nhi[0],&LB($dat));
259	&shl	(&LB($nlo),4);
260	&shr	($nhi[0],4);
261
262	for ($j=11,$i=0;$i<15;$i++) {
263	    &rol	($dat,8);
264	    &xor	($Zlo,"8($Htbl,$nlo)")			if ($i>0);
265	    &xor	($Zhi,"($Htbl,$nlo)")			if ($i>0);
266	    &mov	($Zlo,"8($Htbl,$nlo)")			if ($i==0);
267	    &mov	($Zhi,"($Htbl,$nlo)")			if ($i==0);
268
269	    &mov	(&LB($nlo),&LB($dat));
270	    &xor	($Zlo,$tmp)				if ($i>0);
271	    &movzw	($rem[1],"($rem_8bit,$rem[1],2)")	if ($i>0);
272
273	    &movz	($nhi[1],&LB($dat));
274	    &shl	(&LB($nlo),4);
275	    &movzb	($rem[0],"(%rsp,$nhi[0])");
276
277	    &shr	($nhi[1],4)				if ($i<14);
278	    &and	($nhi[1],0xf0)				if ($i==14);
279	    &shl	($rem[1],48)				if ($i>0);
280	    &xor	($rem[0],$Zlo);
281
282	    &mov	($tmp,$Zhi);
283	    &xor	($Zhi,$rem[1])				if ($i>0);
284	    &shr	($Zlo,8);
285
286	    &movz	($rem[0],&LB($rem[0]));
287	    &mov	($dat,"$j($Xi)")			if (--$j%4==0);
288	    &shr	($Zhi,8);
289
290	    &xor	($Zlo,"-128($Hshr4,$nhi[0],8)");
291	    &shl	($tmp,56);
292	    &xor	($Zhi,"($Hshr4,$nhi[0],8)");
293
294	    unshift	(@nhi,pop(@nhi));		# "rotate" registers
295	    unshift	(@rem,pop(@rem));
296	}
297	&movzw	($rem[1],"($rem_8bit,$rem[1],2)");
298	&xor	($Zlo,"8($Htbl,$nlo)");
299	&xor	($Zhi,"($Htbl,$nlo)");
300
301	&shl	($rem[1],48);
302	&xor	($Zlo,$tmp);
303
304	&xor	($Zhi,$rem[1]);
305	&movz	($rem[0],&LB($Zlo));
306	&shr	($Zlo,4);
307
308	&mov	($tmp,$Zhi);
309	&shl	(&LB($rem[0]),4);
310	&shr	($Zhi,4);
311
312	&xor	($Zlo,"8($Htbl,$nhi[0])");
313	&movzw	($rem[0],"($rem_8bit,$rem[0],2)");
314	&shl	($tmp,60);
315
316	&xor	($Zhi,"($Htbl,$nhi[0])");
317	&xor	($Zlo,$tmp);
318	&shl	($rem[0],48);
319
320	&bswap	($Zlo);
321	&xor	($Zhi,$rem[0]);
322
323	&bswap	($Zhi);
324	&cmp	($inp,$len);
325	&jb	(".Louter_loop");
326}
327$code.=<<___;
328	mov	$Zlo,8($Xi)
329	mov	$Zhi,($Xi)
330
331	lea	280(%rsp),%rsi
332	mov	0(%rsi),%r15
333	mov	8(%rsi),%r14
334	mov	16(%rsi),%r13
335	mov	24(%rsi),%r12
336	mov	32(%rsi),%rbp
337	mov	40(%rsi),%rbx
338	lea	48(%rsi),%rsp
339.Lghash_epilogue:
340	ret
341.size	gcm_ghash_4bit,.-gcm_ghash_4bit
342___
343
344######################################################################
345# PCLMULQDQ version.
346
347@_4args=$win64?	("%rcx","%rdx","%r8", "%r9") :	# Win64 order
348		("%rdi","%rsi","%rdx","%rcx");	# Unix order
349
350($Xi,$Xhi)=("%xmm0","%xmm1");	$Hkey="%xmm2";
351($T1,$T2,$T3)=("%xmm3","%xmm4","%xmm5");
352
353sub clmul64x64_T2 {	# minimal register pressure
354my ($Xhi,$Xi,$Hkey,$modulo)=@_;
355
356$code.=<<___ if (!defined($modulo));
357	movdqa		$Xi,$Xhi		#
358	pshufd		\$0b01001110,$Xi,$T1
359	pshufd		\$0b01001110,$Hkey,$T2
360	pxor		$Xi,$T1			#
361	pxor		$Hkey,$T2
362___
363$code.=<<___;
364	pclmulqdq	\$0x00,$Hkey,$Xi	#######
365	pclmulqdq	\$0x11,$Hkey,$Xhi	#######
366	pclmulqdq	\$0x00,$T2,$T1		#######
367	pxor		$Xi,$T1			#
368	pxor		$Xhi,$T1		#
369
370	movdqa		$T1,$T2			#
371	psrldq		\$8,$T1
372	pslldq		\$8,$T2			#
373	pxor		$T1,$Xhi
374	pxor		$T2,$Xi			#
375___
376}
377
378sub reduction_alg9 {	# 17/13 times faster than Intel version
379my ($Xhi,$Xi) = @_;
380
381$code.=<<___;
382	# 1st phase
383	movdqa		$Xi,$T1			#
384	psllq		\$1,$Xi
385	pxor		$T1,$Xi			#
386	psllq		\$5,$Xi			#
387	pxor		$T1,$Xi			#
388	psllq		\$57,$Xi		#
389	movdqa		$Xi,$T2			#
390	pslldq		\$8,$Xi
391	psrldq		\$8,$T2			#
392	pxor		$T1,$Xi
393	pxor		$T2,$Xhi		#
394
395	# 2nd phase
396	movdqa		$Xi,$T2
397	psrlq		\$5,$Xi
398	pxor		$T2,$Xi			#
399	psrlq		\$1,$Xi			#
400	pxor		$T2,$Xi			#
401	pxor		$Xhi,$T2
402	psrlq		\$1,$Xi			#
403	pxor		$T2,$Xi			#
404___
405}
406
407{ my ($Htbl,$Xip)=@_4args;
408
409$code.=<<___;
410.globl	gcm_init_clmul
411.type	gcm_init_clmul,\@abi-omnipotent
412.align	16
413gcm_init_clmul:
414	movdqu		($Xip),$Hkey
415	pshufd		\$0b01001110,$Hkey,$Hkey	# dword swap
416
417	# <<1 twist
418	pshufd		\$0b11111111,$Hkey,$T2	# broadcast uppermost dword
419	movdqa		$Hkey,$T1
420	psllq		\$1,$Hkey
421	pxor		$T3,$T3			#
422	psrlq		\$63,$T1
423	pcmpgtd		$T2,$T3			# broadcast carry bit
424	pslldq		\$8,$T1
425	por		$T1,$Hkey		# H<<=1
426
427	# magic reduction
428	pand		.L0x1c2_polynomial(%rip),$T3
429	pxor		$T3,$Hkey		# if(carry) H^=0x1c2_polynomial
430
431	# calculate H^2
432	movdqa		$Hkey,$Xi
433___
434	&clmul64x64_T2	($Xhi,$Xi,$Hkey);
435	&reduction_alg9	($Xhi,$Xi);
436$code.=<<___;
437	movdqu		$Hkey,($Htbl)		# save H
438	movdqu		$Xi,16($Htbl)		# save H^2
439	ret
440.size	gcm_init_clmul,.-gcm_init_clmul
441___
442}
443
444{ my ($Xip,$Htbl)=@_4args;
445
446$code.=<<___;
447.globl	gcm_gmult_clmul
448.type	gcm_gmult_clmul,\@abi-omnipotent
449.align	16
450gcm_gmult_clmul:
451	movdqu		($Xip),$Xi
452	movdqa		.Lbswap_mask(%rip),$T3
453	movdqu		($Htbl),$Hkey
454	pshufb		$T3,$Xi
455___
456	&clmul64x64_T2	($Xhi,$Xi,$Hkey);
457	&reduction_alg9	($Xhi,$Xi);
458$code.=<<___;
459	pshufb		$T3,$Xi
460	movdqu		$Xi,($Xip)
461	ret
462.size	gcm_gmult_clmul,.-gcm_gmult_clmul
463___
464}
465
466{ my ($Xip,$Htbl,$inp,$len)=@_4args;
467  my $Xn="%xmm6";
468  my $Xhn="%xmm7";
469  my $Hkey2="%xmm8";
470  my $T1n="%xmm9";
471  my $T2n="%xmm10";
472
473$code.=<<___;
474.globl	gcm_ghash_clmul
475.type	gcm_ghash_clmul,\@abi-omnipotent
476.align	16
477gcm_ghash_clmul:
478___
479$code.=<<___ if ($win64);
480.LSEH_begin_gcm_ghash_clmul:
481	# I can't trust assembler to use specific encoding:-(
482	.byte	0x48,0x83,0xec,0x58		#sub	\$0x58,%rsp
483	.byte	0x0f,0x29,0x34,0x24		#movaps	%xmm6,(%rsp)
484	.byte	0x0f,0x29,0x7c,0x24,0x10	#movdqa	%xmm7,0x10(%rsp)
485	.byte	0x44,0x0f,0x29,0x44,0x24,0x20	#movaps	%xmm8,0x20(%rsp)
486	.byte	0x44,0x0f,0x29,0x4c,0x24,0x30	#movaps	%xmm9,0x30(%rsp)
487	.byte	0x44,0x0f,0x29,0x54,0x24,0x40	#movaps	%xmm10,0x40(%rsp)
488___
489$code.=<<___;
490	movdqa		.Lbswap_mask(%rip),$T3
491
492	movdqu		($Xip),$Xi
493	movdqu		($Htbl),$Hkey
494	pshufb		$T3,$Xi
495
496	sub		\$0x10,$len
497	jz		.Lodd_tail
498
499	movdqu		16($Htbl),$Hkey2
500	#######
501	# Xi+2 =[H*(Ii+1 + Xi+1)] mod P =
502	#	[(H*Ii+1) + (H*Xi+1)] mod P =
503	#	[(H*Ii+1) + H^2*(Ii+Xi)] mod P
504	#
505	movdqu		($inp),$T1		# Ii
506	movdqu		16($inp),$Xn		# Ii+1
507	pshufb		$T3,$T1
508	pshufb		$T3,$Xn
509	pxor		$T1,$Xi			# Ii+Xi
510___
511	&clmul64x64_T2	($Xhn,$Xn,$Hkey);	# H*Ii+1
512$code.=<<___;
513	movdqa		$Xi,$Xhi		#
514	pshufd		\$0b01001110,$Xi,$T1
515	pshufd		\$0b01001110,$Hkey2,$T2
516	pxor		$Xi,$T1			#
517	pxor		$Hkey2,$T2
518
519	lea		32($inp),$inp		# i+=2
520	sub		\$0x20,$len
521	jbe		.Leven_tail
522
523.Lmod_loop:
524___
525	&clmul64x64_T2	($Xhi,$Xi,$Hkey2,1);	# H^2*(Ii+Xi)
526$code.=<<___;
527	movdqu		($inp),$T1		# Ii
528	pxor		$Xn,$Xi			# (H*Ii+1) + H^2*(Ii+Xi)
529	pxor		$Xhn,$Xhi
530
531	movdqu		16($inp),$Xn		# Ii+1
532	pshufb		$T3,$T1
533	pshufb		$T3,$Xn
534
535	movdqa		$Xn,$Xhn		#
536	pshufd		\$0b01001110,$Xn,$T1n
537	pshufd		\$0b01001110,$Hkey,$T2n
538	pxor		$Xn,$T1n		#
539	pxor		$Hkey,$T2n
540	 pxor		$T1,$Xhi		# "Ii+Xi", consume early
541
542	  movdqa	$Xi,$T1			# 1st phase
543	  psllq		\$1,$Xi
544	  pxor		$T1,$Xi			#
545	  psllq		\$5,$Xi			#
546	  pxor		$T1,$Xi			#
547	pclmulqdq	\$0x00,$Hkey,$Xn	#######
548	  psllq		\$57,$Xi		#
549	  movdqa	$Xi,$T2			#
550	  pslldq	\$8,$Xi
551	  psrldq	\$8,$T2			#
552	  pxor		$T1,$Xi
553	  pxor		$T2,$Xhi		#
554
555	pclmulqdq	\$0x11,$Hkey,$Xhn	#######
556	  movdqa	$Xi,$T2			# 2nd phase
557	  psrlq		\$5,$Xi
558	  pxor		$T2,$Xi			#
559	  psrlq		\$1,$Xi			#
560	  pxor		$T2,$Xi			#
561	  pxor		$Xhi,$T2
562	  psrlq		\$1,$Xi			#
563	  pxor		$T2,$Xi			#
564
565	pclmulqdq	\$0x00,$T2n,$T1n	#######
566	 movdqa		$Xi,$Xhi		#
567	 pshufd		\$0b01001110,$Xi,$T1
568	 pshufd		\$0b01001110,$Hkey2,$T2
569	 pxor		$Xi,$T1			#
570	 pxor		$Hkey2,$T2
571
572	pxor		$Xn,$T1n		#
573	pxor		$Xhn,$T1n		#
574	movdqa		$T1n,$T2n		#
575	psrldq		\$8,$T1n
576	pslldq		\$8,$T2n		#
577	pxor		$T1n,$Xhn
578	pxor		$T2n,$Xn		#
579
580	lea		32($inp),$inp
581	sub		\$0x20,$len
582	ja		.Lmod_loop
583
584.Leven_tail:
585___
586	&clmul64x64_T2	($Xhi,$Xi,$Hkey2,1);	# H^2*(Ii+Xi)
587$code.=<<___;
588	pxor		$Xn,$Xi			# (H*Ii+1) + H^2*(Ii+Xi)
589	pxor		$Xhn,$Xhi
590___
591	&reduction_alg9	($Xhi,$Xi);
592$code.=<<___;
593	test		$len,$len
594	jnz		.Ldone
595
596.Lodd_tail:
597	movdqu		($inp),$T1		# Ii
598	pshufb		$T3,$T1
599	pxor		$T1,$Xi			# Ii+Xi
600___
601	&clmul64x64_T2	($Xhi,$Xi,$Hkey);	# H*(Ii+Xi)
602	&reduction_alg9	($Xhi,$Xi);
603$code.=<<___;
604.Ldone:
605	pshufb		$T3,$Xi
606	movdqu		$Xi,($Xip)
607___
608$code.=<<___ if ($win64);
609	movaps	(%rsp),%xmm6
610	movaps	0x10(%rsp),%xmm7
611	movaps	0x20(%rsp),%xmm8
612	movaps	0x30(%rsp),%xmm9
613	movaps	0x40(%rsp),%xmm10
614	add	\$0x58,%rsp
615___
616$code.=<<___;
617	ret
618.LSEH_end_gcm_ghash_clmul:
619.size	gcm_ghash_clmul,.-gcm_ghash_clmul
620___
621}
622
623$code.=<<___;
624.align	64
625.Lbswap_mask:
626	.byte	15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
627.L0x1c2_polynomial:
628	.byte	1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2
629.align	64
630.type	.Lrem_4bit,\@object
631.Lrem_4bit:
632	.long	0,`0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`
633	.long	0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
634	.long	0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
635	.long	0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
636.type	.Lrem_8bit,\@object
637.Lrem_8bit:
638	.value	0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
639	.value	0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
640	.value	0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
641	.value	0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
642	.value	0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
643	.value	0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
644	.value	0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
645	.value	0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
646	.value	0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
647	.value	0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
648	.value	0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
649	.value	0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
650	.value	0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
651	.value	0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
652	.value	0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
653	.value	0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
654	.value	0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
655	.value	0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
656	.value	0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
657	.value	0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
658	.value	0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
659	.value	0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
660	.value	0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
661	.value	0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
662	.value	0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
663	.value	0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
664	.value	0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
665	.value	0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
666	.value	0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
667	.value	0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
668	.value	0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
669	.value	0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
670
671.asciz	"GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
672.align	64
673___
674
675# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
676#		CONTEXT *context,DISPATCHER_CONTEXT *disp)
677if ($win64) {
678$rec="%rcx";
679$frame="%rdx";
680$context="%r8";
681$disp="%r9";
682
683$code.=<<___;
684.extern	__imp_RtlVirtualUnwind
685.type	se_handler,\@abi-omnipotent
686.align	16
687se_handler:
688	push	%rsi
689	push	%rdi
690	push	%rbx
691	push	%rbp
692	push	%r12
693	push	%r13
694	push	%r14
695	push	%r15
696	pushfq
697	sub	\$64,%rsp
698
699	mov	120($context),%rax	# pull context->Rax
700	mov	248($context),%rbx	# pull context->Rip
701
702	mov	8($disp),%rsi		# disp->ImageBase
703	mov	56($disp),%r11		# disp->HandlerData
704
705	mov	0(%r11),%r10d		# HandlerData[0]
706	lea	(%rsi,%r10),%r10	# prologue label
707	cmp	%r10,%rbx		# context->Rip<prologue label
708	jb	.Lin_prologue
709
710	mov	152($context),%rax	# pull context->Rsp
711
712	mov	4(%r11),%r10d		# HandlerData[1]
713	lea	(%rsi,%r10),%r10	# epilogue label
714	cmp	%r10,%rbx		# context->Rip>=epilogue label
715	jae	.Lin_prologue
716
717	lea	24(%rax),%rax		# adjust "rsp"
718
719	mov	-8(%rax),%rbx
720	mov	-16(%rax),%rbp
721	mov	-24(%rax),%r12
722	mov	%rbx,144($context)	# restore context->Rbx
723	mov	%rbp,160($context)	# restore context->Rbp
724	mov	%r12,216($context)	# restore context->R12
725
726.Lin_prologue:
727	mov	8(%rax),%rdi
728	mov	16(%rax),%rsi
729	mov	%rax,152($context)	# restore context->Rsp
730	mov	%rsi,168($context)	# restore context->Rsi
731	mov	%rdi,176($context)	# restore context->Rdi
732
733	mov	40($disp),%rdi		# disp->ContextRecord
734	mov	$context,%rsi		# context
735	mov	\$`1232/8`,%ecx		# sizeof(CONTEXT)
736	.long	0xa548f3fc		# cld; rep movsq
737
738	mov	$disp,%rsi
739	xor	%rcx,%rcx		# arg1, UNW_FLAG_NHANDLER
740	mov	8(%rsi),%rdx		# arg2, disp->ImageBase
741	mov	0(%rsi),%r8		# arg3, disp->ControlPc
742	mov	16(%rsi),%r9		# arg4, disp->FunctionEntry
743	mov	40(%rsi),%r10		# disp->ContextRecord
744	lea	56(%rsi),%r11		# &disp->HandlerData
745	lea	24(%rsi),%r12		# &disp->EstablisherFrame
746	mov	%r10,32(%rsp)		# arg5
747	mov	%r11,40(%rsp)		# arg6
748	mov	%r12,48(%rsp)		# arg7
749	mov	%rcx,56(%rsp)		# arg8, (NULL)
750	call	*__imp_RtlVirtualUnwind(%rip)
751
752	mov	\$1,%eax		# ExceptionContinueSearch
753	add	\$64,%rsp
754	popfq
755	pop	%r15
756	pop	%r14
757	pop	%r13
758	pop	%r12
759	pop	%rbp
760	pop	%rbx
761	pop	%rdi
762	pop	%rsi
763	ret
764.size	se_handler,.-se_handler
765
766.section	.pdata
767.align	4
768	.rva	.LSEH_begin_gcm_gmult_4bit
769	.rva	.LSEH_end_gcm_gmult_4bit
770	.rva	.LSEH_info_gcm_gmult_4bit
771
772	.rva	.LSEH_begin_gcm_ghash_4bit
773	.rva	.LSEH_end_gcm_ghash_4bit
774	.rva	.LSEH_info_gcm_ghash_4bit
775
776	.rva	.LSEH_begin_gcm_ghash_clmul
777	.rva	.LSEH_end_gcm_ghash_clmul
778	.rva	.LSEH_info_gcm_ghash_clmul
779
780.section	.xdata
781.align	8
782.LSEH_info_gcm_gmult_4bit:
783	.byte	9,0,0,0
784	.rva	se_handler
785	.rva	.Lgmult_prologue,.Lgmult_epilogue	# HandlerData
786.LSEH_info_gcm_ghash_4bit:
787	.byte	9,0,0,0
788	.rva	se_handler
789	.rva	.Lghash_prologue,.Lghash_epilogue	# HandlerData
790.LSEH_info_gcm_ghash_clmul:
791	.byte	0x01,0x1f,0x0b,0x00
792	.byte	0x1f,0xa8,0x04,0x00	#movaps 0x40(rsp),xmm10
793	.byte	0x19,0x98,0x03,0x00	#movaps 0x30(rsp),xmm9
794	.byte	0x13,0x88,0x02,0x00	#movaps 0x20(rsp),xmm8
795	.byte	0x0d,0x78,0x01,0x00	#movaps 0x10(rsp),xmm7
796	.byte	0x08,0x68,0x00,0x00	#movaps (rsp),xmm6
797	.byte	0x04,0xa2,0x00,0x00	#sub	rsp,0x58
798___
799}
800
801$code =~ s/\`([^\`]*)\`/eval($1)/gem;
802
803print $code;
804
805close STDOUT;
806