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1#! /usr/bin/env perl
2# Copyright 2014-2020 The OpenSSL Project Authors. All Rights Reserved.
3#
4# Licensed under the Apache License 2.0 (the "License").  You may not use
5# this file except in compliance with the License.  You can obtain a copy
6# in the file LICENSE in the source distribution or at
7# https://www.openssl.org/source/license.html
8
9#
10# ====================================================================
11# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
12# project. The module is, however, dual licensed under OpenSSL and
13# CRYPTOGAMS licenses depending on where you obtain it. For further
14# details see http://www.openssl.org/~appro/cryptogams/.
15# ====================================================================
16#
17# SHA1 for ARMv8.
18#
19# Performance in cycles per processed byte and improvement coefficient
20# over code generated with "default" compiler:
21#
22#		hardware-assisted	software(*)
23# Apple A7	2.31			4.13 (+14%)
24# Cortex-A53	2.24			8.03 (+97%)
25# Cortex-A57	2.35			7.88 (+74%)
26# Denver	2.13			3.97 (+0%)(**)
27# X-Gene				8.80 (+200%)
28# Mongoose	2.05			6.50 (+160%)
29# Kryo		1.88			8.00 (+90%)
30# ThunderX2	2.64			6.36 (+150%)
31#
32# (*)	Software results are presented mostly for reference purposes.
33# (**)	Keep in mind that Denver relies on binary translation, which
34#	optimizes compiler output at run-time.
35
36# $output is the last argument if it looks like a file (it has an extension)
37# $flavour is the first argument if it doesn't look like a file
38$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
39$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
40
41$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
42( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
43( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
44die "can't locate arm-xlate.pl";
45
46open OUT,"| \"$^X\" $xlate $flavour \"$output\""
47    or die "can't call $xlate: $1";
48*STDOUT=*OUT;
49
50($ctx,$inp,$num)=("x0","x1","x2");
51@Xw=map("w$_",(3..17,19));
52@Xx=map("x$_",(3..17,19));
53@V=($A,$B,$C,$D,$E)=map("w$_",(20..24));
54($t0,$t1,$t2,$K)=map("w$_",(25..28));
55
56
57sub BODY_00_19 {
58my ($i,$a,$b,$c,$d,$e)=@_;
59my $j=($i+2)&15;
60
61$code.=<<___ if ($i<15 && !($i&1));
62	lsr	@Xx[$i+1],@Xx[$i],#32
63___
64$code.=<<___ if ($i<14 && !($i&1));
65	ldur	@Xx[$i+2],[$inp,#`($i+2)*4-64`]
66___
67$code.=<<___ if ($i<14 && ($i&1));
68#ifdef	__AARCH64EB__
69	ror	@Xx[$i+1],@Xx[$i+1],#32
70#else
71	rev32	@Xx[$i+1],@Xx[$i+1]
72#endif
73___
74$code.=<<___ if ($i<14);
75	bic	$t0,$d,$b
76	and	$t1,$c,$b
77	ror	$t2,$a,#27
78	add	$d,$d,$K		// future e+=K
79	orr	$t0,$t0,$t1
80	add	$e,$e,$t2		// e+=rot(a,5)
81	ror	$b,$b,#2
82	add	$d,$d,@Xw[($i+1)&15]	// future e+=X[i]
83	add	$e,$e,$t0		// e+=F(b,c,d)
84___
85$code.=<<___ if ($i==19);
86	movz	$K,#0xeba1
87	movk	$K,#0x6ed9,lsl#16
88___
89$code.=<<___ if ($i>=14);
90	 eor	@Xw[$j],@Xw[$j],@Xw[($j+2)&15]
91	bic	$t0,$d,$b
92	and	$t1,$c,$b
93	ror	$t2,$a,#27
94	 eor	@Xw[$j],@Xw[$j],@Xw[($j+8)&15]
95	add	$d,$d,$K		// future e+=K
96	orr	$t0,$t0,$t1
97	add	$e,$e,$t2		// e+=rot(a,5)
98	 eor	@Xw[$j],@Xw[$j],@Xw[($j+13)&15]
99	ror	$b,$b,#2
100	add	$d,$d,@Xw[($i+1)&15]	// future e+=X[i]
101	add	$e,$e,$t0		// e+=F(b,c,d)
102	 ror	@Xw[$j],@Xw[$j],#31
103___
104}
105
106sub BODY_40_59 {
107my ($i,$a,$b,$c,$d,$e)=@_;
108my $j=($i+2)&15;
109
110$code.=<<___ if ($i==59);
111	movz	$K,#0xc1d6
112	movk	$K,#0xca62,lsl#16
113___
114$code.=<<___;
115	orr	$t0,$b,$c
116	and	$t1,$b,$c
117	 eor	@Xw[$j],@Xw[$j],@Xw[($j+2)&15]
118	ror	$t2,$a,#27
119	and	$t0,$t0,$d
120	add	$d,$d,$K		// future e+=K
121	 eor	@Xw[$j],@Xw[$j],@Xw[($j+8)&15]
122	add	$e,$e,$t2		// e+=rot(a,5)
123	orr	$t0,$t0,$t1
124	ror	$b,$b,#2
125	 eor	@Xw[$j],@Xw[$j],@Xw[($j+13)&15]
126	add	$d,$d,@Xw[($i+1)&15]	// future e+=X[i]
127	add	$e,$e,$t0		// e+=F(b,c,d)
128	 ror	@Xw[$j],@Xw[$j],#31
129___
130}
131
132sub BODY_20_39 {
133my ($i,$a,$b,$c,$d,$e)=@_;
134my $j=($i+2)&15;
135
136$code.=<<___ if ($i==39);
137	movz	$K,#0xbcdc
138	movk	$K,#0x8f1b,lsl#16
139___
140$code.=<<___ if ($i<78);
141	 eor	@Xw[$j],@Xw[$j],@Xw[($j+2)&15]
142	eor	$t0,$d,$b
143	ror	$t2,$a,#27
144	add	$d,$d,$K		// future e+=K
145	 eor	@Xw[$j],@Xw[$j],@Xw[($j+8)&15]
146	eor	$t0,$t0,$c
147	add	$e,$e,$t2		// e+=rot(a,5)
148	ror	$b,$b,#2
149	 eor	@Xw[$j],@Xw[$j],@Xw[($j+13)&15]
150	add	$d,$d,@Xw[($i+1)&15]	// future e+=X[i]
151	add	$e,$e,$t0		// e+=F(b,c,d)
152	 ror	@Xw[$j],@Xw[$j],#31
153___
154$code.=<<___ if ($i==78);
155	ldp	@Xw[1],@Xw[2],[$ctx]
156	eor	$t0,$d,$b
157	ror	$t2,$a,#27
158	add	$d,$d,$K		// future e+=K
159	eor	$t0,$t0,$c
160	add	$e,$e,$t2		// e+=rot(a,5)
161	ror	$b,$b,#2
162	add	$d,$d,@Xw[($i+1)&15]	// future e+=X[i]
163	add	$e,$e,$t0		// e+=F(b,c,d)
164___
165$code.=<<___ if ($i==79);
166	ldp	@Xw[3],@Xw[4],[$ctx,#8]
167	eor	$t0,$d,$b
168	ror	$t2,$a,#27
169	eor	$t0,$t0,$c
170	add	$e,$e,$t2		// e+=rot(a,5)
171	ror	$b,$b,#2
172	ldr	@Xw[5],[$ctx,#16]
173	add	$e,$e,$t0		// e+=F(b,c,d)
174___
175}
176
177$code.=<<___;
178#ifndef	__KERNEL__
179# include "arm_arch.h"
180.extern OPENSSL_armcap_P
181.hidden OPENSSL_armcap_P
182#endif
183
184.text
185
186.globl	sha1_block_data_order
187.type	sha1_block_data_order,%function
188.align	6
189sha1_block_data_order:
190	adrp	x16,OPENSSL_armcap_P
191	ldr	w16,[x16,#:lo12:OPENSSL_armcap_P]
192	tst	w16,#ARMV8_SHA1
193	b.ne	.Lv8_entry
194
195	stp	x29,x30,[sp,#-96]!
196	add	x29,sp,#0
197	stp	x19,x20,[sp,#16]
198	stp	x21,x22,[sp,#32]
199	stp	x23,x24,[sp,#48]
200	stp	x25,x26,[sp,#64]
201	stp	x27,x28,[sp,#80]
202
203	ldp	$A,$B,[$ctx]
204	ldp	$C,$D,[$ctx,#8]
205	ldr	$E,[$ctx,#16]
206
207.Loop:
208	ldr	@Xx[0],[$inp],#64
209	movz	$K,#0x7999
210	sub	$num,$num,#1
211	movk	$K,#0x5a82,lsl#16
212#ifdef	__AARCH64EB__
213	ror	$Xx[0],@Xx[0],#32
214#else
215	rev32	@Xx[0],@Xx[0]
216#endif
217	add	$E,$E,$K		// warm it up
218	add	$E,$E,@Xw[0]
219___
220for($i=0;$i<20;$i++)	{ &BODY_00_19($i,@V); unshift(@V,pop(@V)); }
221for(;$i<40;$i++)	{ &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
222for(;$i<60;$i++)	{ &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
223for(;$i<80;$i++)	{ &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
224$code.=<<___;
225	add	$B,$B,@Xw[2]
226	add	$C,$C,@Xw[3]
227	add	$A,$A,@Xw[1]
228	add	$D,$D,@Xw[4]
229	add	$E,$E,@Xw[5]
230	stp	$A,$B,[$ctx]
231	stp	$C,$D,[$ctx,#8]
232	str	$E,[$ctx,#16]
233	cbnz	$num,.Loop
234
235	ldp	x19,x20,[sp,#16]
236	ldp	x21,x22,[sp,#32]
237	ldp	x23,x24,[sp,#48]
238	ldp	x25,x26,[sp,#64]
239	ldp	x27,x28,[sp,#80]
240	ldr	x29,[sp],#96
241	ret
242.size	sha1_block_data_order,.-sha1_block_data_order
243___
244{{{
245my ($ABCD,$E,$E0,$E1)=map("v$_.16b",(0..3));
246my @MSG=map("v$_.16b",(4..7));
247my @Kxx=map("v$_.4s",(16..19));
248my ($W0,$W1)=("v20.4s","v21.4s");
249my $ABCD_SAVE="v22.16b";
250
251$code.=<<___;
252.type	sha1_block_armv8,%function
253.align	6
254sha1_block_armv8:
255.Lv8_entry:
256	stp	x29,x30,[sp,#-16]!
257	add	x29,sp,#0
258
259	adr	x4,.Lconst
260	eor	$E,$E,$E
261	ld1.32	{$ABCD},[$ctx],#16
262	ld1.32	{$E}[0],[$ctx]
263	sub	$ctx,$ctx,#16
264	ld1.32	{@Kxx[0]-@Kxx[3]},[x4]
265
266.Loop_hw:
267	ld1	{@MSG[0]-@MSG[3]},[$inp],#64
268	sub	$num,$num,#1
269	rev32	@MSG[0],@MSG[0]
270	rev32	@MSG[1],@MSG[1]
271
272	add.i32	$W0,@Kxx[0],@MSG[0]
273	rev32	@MSG[2],@MSG[2]
274	orr	$ABCD_SAVE,$ABCD,$ABCD	// offload
275
276	add.i32	$W1,@Kxx[0],@MSG[1]
277	rev32	@MSG[3],@MSG[3]
278	sha1h	$E1,$ABCD
279	sha1c	$ABCD,$E,$W0		// 0
280	add.i32	$W0,@Kxx[$j],@MSG[2]
281	sha1su0	@MSG[0],@MSG[1],@MSG[2]
282___
283for ($j=0,$i=1;$i<20-3;$i++) {
284my $f=("c","p","m","p")[$i/5];
285$code.=<<___;
286	sha1h	$E0,$ABCD		// $i
287	sha1$f	$ABCD,$E1,$W1
288	add.i32	$W1,@Kxx[$j],@MSG[3]
289	sha1su1	@MSG[0],@MSG[3]
290___
291$code.=<<___ if ($i<20-4);
292	sha1su0	@MSG[1],@MSG[2],@MSG[3]
293___
294	($E0,$E1)=($E1,$E0);		($W0,$W1)=($W1,$W0);
295	push(@MSG,shift(@MSG));		$j++ if ((($i+3)%5)==0);
296}
297$code.=<<___;
298	sha1h	$E0,$ABCD		// $i
299	sha1p	$ABCD,$E1,$W1
300	add.i32	$W1,@Kxx[$j],@MSG[3]
301
302	sha1h	$E1,$ABCD		// 18
303	sha1p	$ABCD,$E0,$W0
304
305	sha1h	$E0,$ABCD		// 19
306	sha1p	$ABCD,$E1,$W1
307
308	add.i32	$E,$E,$E0
309	add.i32	$ABCD,$ABCD,$ABCD_SAVE
310
311	cbnz	$num,.Loop_hw
312
313	st1.32	{$ABCD},[$ctx],#16
314	st1.32	{$E}[0],[$ctx]
315
316	ldr	x29,[sp],#16
317	ret
318.size	sha1_block_armv8,.-sha1_block_armv8
319.align	6
320.Lconst:
321.long	0x5a827999,0x5a827999,0x5a827999,0x5a827999	//K_00_19
322.long	0x6ed9eba1,0x6ed9eba1,0x6ed9eba1,0x6ed9eba1	//K_20_39
323.long	0x8f1bbcdc,0x8f1bbcdc,0x8f1bbcdc,0x8f1bbcdc	//K_40_59
324.long	0xca62c1d6,0xca62c1d6,0xca62c1d6,0xca62c1d6	//K_60_79
325.asciz	"SHA1 block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
326.align	2
327___
328}}}
329
330{   my	%opcode = (
331	"sha1c"		=> 0x5e000000,	"sha1p"		=> 0x5e001000,
332	"sha1m"		=> 0x5e002000,	"sha1su0"	=> 0x5e003000,
333	"sha1h"		=> 0x5e280800,	"sha1su1"	=> 0x5e281800	);
334
335    sub unsha1 {
336	my ($mnemonic,$arg)=@_;
337
338	$arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
339	&&
340	sprintf ".inst\t0x%08x\t//%s %s",
341			$opcode{$mnemonic}|$1|($2<<5)|($3<<16),
342			$mnemonic,$arg;
343    }
344}
345
346foreach(split("\n",$code)) {
347
348	s/\`([^\`]*)\`/eval($1)/geo;
349
350	s/\b(sha1\w+)\s+([qv].*)/unsha1($1,$2)/geo;
351
352	s/\.\w?32\b//o		and s/\.16b/\.4s/go;
353	m/(ld|st)1[^\[]+\[0\]/o	and s/\.4s/\.s/go;
354
355	print $_,"\n";
356}
357
358close STDOUT or die "error closing STDOUT: $!";
359