• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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# SHA256/512 for ARMv8.
11#
12# Performance in cycles per processed byte and improvement coefficient
13# over code generated with "default" compiler:
14#
15#		SHA256-hw	SHA256(*)	SHA512
16# Apple A7	1.97		10.5 (+33%)	6.73 (-1%(**))
17# Cortex-A53	2.38		15.5 (+115%)	10.0 (+150%(***))
18# Cortex-A57	2.31		11.6 (+86%)	7.51 (+260%(***))
19# Denver	2.01		10.5 (+26%)	6.70 (+8%)
20# X-Gene			20.0 (+100%)	12.8 (+300%(***))
21#
22# (*)	Software SHA256 results are of lesser relevance, presented
23#	mostly for informational purposes.
24# (**)	The result is a trade-off: it's possible to improve it by
25#	10% (or by 1 cycle per round), but at the cost of 20% loss
26#	on Cortex-A53 (or by 4 cycles per round).
27# (***)	Super-impressive coefficients over gcc-generated code are
28#	indication of some compiler "pathology", most notably code
29#	generated with -mgeneral-regs-only is significanty faster
30#	and the gap is only 40-90%.
31
32$flavour=shift;
33$output=shift;
34
35$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
36( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
37( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
38die "can't locate arm-xlate.pl";
39
40open OUT,"| \"$^X\" $xlate $flavour $output";
41*STDOUT=*OUT;
42
43if ($output =~ /512/) {
44	$BITS=512;
45	$SZ=8;
46	@Sigma0=(28,34,39);
47	@Sigma1=(14,18,41);
48	@sigma0=(1,  8, 7);
49	@sigma1=(19,61, 6);
50	$rounds=80;
51	$reg_t="x";
52} else {
53	$BITS=256;
54	$SZ=4;
55	@Sigma0=( 2,13,22);
56	@Sigma1=( 6,11,25);
57	@sigma0=( 7,18, 3);
58	@sigma1=(17,19,10);
59	$rounds=64;
60	$reg_t="w";
61}
62
63$func="sha${BITS}_block_data_order";
64
65($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
66
67@X=map("$reg_t$_",(3..15,0..2));
68@V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
69($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
70
71sub BODY_00_xx {
72my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
73my $j=($i+1)&15;
74my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
75   $T0=@X[$i+3] if ($i<11);
76
77$code.=<<___	if ($i<16);
78#ifndef	__ARMEB__
79	rev	@X[$i],@X[$i]			// $i
80#endif
81___
82$code.=<<___	if ($i<13 && ($i&1));
83	ldp	@X[$i+1],@X[$i+2],[$inp],#2*$SZ
84___
85$code.=<<___	if ($i==13);
86	ldp	@X[14],@X[15],[$inp]
87___
88$code.=<<___	if ($i>=14);
89	ldr	@X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
90___
91$code.=<<___	if ($i>0 && $i<16);
92	add	$a,$a,$t1			// h+=Sigma0(a)
93___
94$code.=<<___	if ($i>=11);
95	str	@X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
96___
97# While ARMv8 specifies merged rotate-n-logical operation such as
98# 'eor x,y,z,ror#n', it was found to negatively affect performance
99# on Apple A7. The reason seems to be that it requires even 'y' to
100# be available earlier. This means that such merged instruction is
101# not necessarily best choice on critical path... On the other hand
102# Cortex-A5x handles merged instructions much better than disjoint
103# rotate and logical... See (**) footnote above.
104$code.=<<___	if ($i<15);
105	ror	$t0,$e,#$Sigma1[0]
106	add	$h,$h,$t2			// h+=K[i]
107	eor	$T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
108	and	$t1,$f,$e
109	bic	$t2,$g,$e
110	add	$h,$h,@X[$i&15]			// h+=X[i]
111	orr	$t1,$t1,$t2			// Ch(e,f,g)
112	eor	$t2,$a,$b			// a^b, b^c in next round
113	eor	$t0,$t0,$T0,ror#$Sigma1[1]	// Sigma1(e)
114	ror	$T0,$a,#$Sigma0[0]
115	add	$h,$h,$t1			// h+=Ch(e,f,g)
116	eor	$t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
117	add	$h,$h,$t0			// h+=Sigma1(e)
118	and	$t3,$t3,$t2			// (b^c)&=(a^b)
119	add	$d,$d,$h			// d+=h
120	eor	$t3,$t3,$b			// Maj(a,b,c)
121	eor	$t1,$T0,$t1,ror#$Sigma0[1]	// Sigma0(a)
122	add	$h,$h,$t3			// h+=Maj(a,b,c)
123	ldr	$t3,[$Ktbl],#$SZ		// *K++, $t2 in next round
124	//add	$h,$h,$t1			// h+=Sigma0(a)
125___
126$code.=<<___	if ($i>=15);
127	ror	$t0,$e,#$Sigma1[0]
128	add	$h,$h,$t2			// h+=K[i]
129	ror	$T1,@X[($j+1)&15],#$sigma0[0]
130	and	$t1,$f,$e
131	ror	$T2,@X[($j+14)&15],#$sigma1[0]
132	bic	$t2,$g,$e
133	ror	$T0,$a,#$Sigma0[0]
134	add	$h,$h,@X[$i&15]			// h+=X[i]
135	eor	$t0,$t0,$e,ror#$Sigma1[1]
136	eor	$T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
137	orr	$t1,$t1,$t2			// Ch(e,f,g)
138	eor	$t2,$a,$b			// a^b, b^c in next round
139	eor	$t0,$t0,$e,ror#$Sigma1[2]	// Sigma1(e)
140	eor	$T0,$T0,$a,ror#$Sigma0[1]
141	add	$h,$h,$t1			// h+=Ch(e,f,g)
142	and	$t3,$t3,$t2			// (b^c)&=(a^b)
143	eor	$T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
144	eor	$T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]	// sigma0(X[i+1])
145	add	$h,$h,$t0			// h+=Sigma1(e)
146	eor	$t3,$t3,$b			// Maj(a,b,c)
147	eor	$t1,$T0,$a,ror#$Sigma0[2]	// Sigma0(a)
148	eor	$T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]	// sigma1(X[i+14])
149	add	@X[$j],@X[$j],@X[($j+9)&15]
150	add	$d,$d,$h			// d+=h
151	add	$h,$h,$t3			// h+=Maj(a,b,c)
152	ldr	$t3,[$Ktbl],#$SZ		// *K++, $t2 in next round
153	add	@X[$j],@X[$j],$T1
154	add	$h,$h,$t1			// h+=Sigma0(a)
155	add	@X[$j],@X[$j],$T2
156___
157	($t2,$t3)=($t3,$t2);
158}
159
160$code.=<<___;
161#include <openssl/arm_arch.h>
162
163.text
164
165.extern	OPENSSL_armcap_P
166.globl	$func
167.type	$func,%function
168.align	6
169$func:
170___
171$code.=<<___	if ($SZ==4);
172	ldr	x16,.LOPENSSL_armcap_P
173	adr	x17,.LOPENSSL_armcap_P
174	add	x16,x16,x17
175	ldr	w16,[x16]
176	tst	w16,#ARMV8_SHA256
177	b.ne	.Lv8_entry
178___
179$code.=<<___;
180	stp	x29,x30,[sp,#-128]!
181	add	x29,sp,#0
182
183	stp	x19,x20,[sp,#16]
184	stp	x21,x22,[sp,#32]
185	stp	x23,x24,[sp,#48]
186	stp	x25,x26,[sp,#64]
187	stp	x27,x28,[sp,#80]
188	sub	sp,sp,#4*$SZ
189
190	ldp	$A,$B,[$ctx]				// load context
191	ldp	$C,$D,[$ctx,#2*$SZ]
192	ldp	$E,$F,[$ctx,#4*$SZ]
193	add	$num,$inp,$num,lsl#`log(16*$SZ)/log(2)`	// end of input
194	ldp	$G,$H,[$ctx,#6*$SZ]
195	adr	$Ktbl,.LK$BITS
196	stp	$ctx,$num,[x29,#96]
197
198.Loop:
199	ldp	@X[0],@X[1],[$inp],#2*$SZ
200	ldr	$t2,[$Ktbl],#$SZ			// *K++
201	eor	$t3,$B,$C				// magic seed
202	str	$inp,[x29,#112]
203___
204for ($i=0;$i<16;$i++)	{ &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
205$code.=".Loop_16_xx:\n";
206for (;$i<32;$i++)	{ &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
207$code.=<<___;
208	cbnz	$t2,.Loop_16_xx
209
210	ldp	$ctx,$num,[x29,#96]
211	ldr	$inp,[x29,#112]
212	sub	$Ktbl,$Ktbl,#`$SZ*($rounds+1)`		// rewind
213
214	ldp	@X[0],@X[1],[$ctx]
215	ldp	@X[2],@X[3],[$ctx,#2*$SZ]
216	add	$inp,$inp,#14*$SZ			// advance input pointer
217	ldp	@X[4],@X[5],[$ctx,#4*$SZ]
218	add	$A,$A,@X[0]
219	ldp	@X[6],@X[7],[$ctx,#6*$SZ]
220	add	$B,$B,@X[1]
221	add	$C,$C,@X[2]
222	add	$D,$D,@X[3]
223	stp	$A,$B,[$ctx]
224	add	$E,$E,@X[4]
225	add	$F,$F,@X[5]
226	stp	$C,$D,[$ctx,#2*$SZ]
227	add	$G,$G,@X[6]
228	add	$H,$H,@X[7]
229	cmp	$inp,$num
230	stp	$E,$F,[$ctx,#4*$SZ]
231	stp	$G,$H,[$ctx,#6*$SZ]
232	b.ne	.Loop
233
234	ldp	x19,x20,[x29,#16]
235	add	sp,sp,#4*$SZ
236	ldp	x21,x22,[x29,#32]
237	ldp	x23,x24,[x29,#48]
238	ldp	x25,x26,[x29,#64]
239	ldp	x27,x28,[x29,#80]
240	ldp	x29,x30,[sp],#128
241	ret
242.size	$func,.-$func
243
244.align	6
245.type	.LK$BITS,%object
246.LK$BITS:
247___
248$code.=<<___ if ($SZ==8);
249	.quad	0x428a2f98d728ae22,0x7137449123ef65cd
250	.quad	0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
251	.quad	0x3956c25bf348b538,0x59f111f1b605d019
252	.quad	0x923f82a4af194f9b,0xab1c5ed5da6d8118
253	.quad	0xd807aa98a3030242,0x12835b0145706fbe
254	.quad	0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
255	.quad	0x72be5d74f27b896f,0x80deb1fe3b1696b1
256	.quad	0x9bdc06a725c71235,0xc19bf174cf692694
257	.quad	0xe49b69c19ef14ad2,0xefbe4786384f25e3
258	.quad	0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
259	.quad	0x2de92c6f592b0275,0x4a7484aa6ea6e483
260	.quad	0x5cb0a9dcbd41fbd4,0x76f988da831153b5
261	.quad	0x983e5152ee66dfab,0xa831c66d2db43210
262	.quad	0xb00327c898fb213f,0xbf597fc7beef0ee4
263	.quad	0xc6e00bf33da88fc2,0xd5a79147930aa725
264	.quad	0x06ca6351e003826f,0x142929670a0e6e70
265	.quad	0x27b70a8546d22ffc,0x2e1b21385c26c926
266	.quad	0x4d2c6dfc5ac42aed,0x53380d139d95b3df
267	.quad	0x650a73548baf63de,0x766a0abb3c77b2a8
268	.quad	0x81c2c92e47edaee6,0x92722c851482353b
269	.quad	0xa2bfe8a14cf10364,0xa81a664bbc423001
270	.quad	0xc24b8b70d0f89791,0xc76c51a30654be30
271	.quad	0xd192e819d6ef5218,0xd69906245565a910
272	.quad	0xf40e35855771202a,0x106aa07032bbd1b8
273	.quad	0x19a4c116b8d2d0c8,0x1e376c085141ab53
274	.quad	0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
275	.quad	0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
276	.quad	0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
277	.quad	0x748f82ee5defb2fc,0x78a5636f43172f60
278	.quad	0x84c87814a1f0ab72,0x8cc702081a6439ec
279	.quad	0x90befffa23631e28,0xa4506cebde82bde9
280	.quad	0xbef9a3f7b2c67915,0xc67178f2e372532b
281	.quad	0xca273eceea26619c,0xd186b8c721c0c207
282	.quad	0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
283	.quad	0x06f067aa72176fba,0x0a637dc5a2c898a6
284	.quad	0x113f9804bef90dae,0x1b710b35131c471b
285	.quad	0x28db77f523047d84,0x32caab7b40c72493
286	.quad	0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
287	.quad	0x4cc5d4becb3e42b6,0x597f299cfc657e2a
288	.quad	0x5fcb6fab3ad6faec,0x6c44198c4a475817
289	.quad	0	// terminator
290___
291$code.=<<___ if ($SZ==4);
292	.long	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
293	.long	0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
294	.long	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
295	.long	0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
296	.long	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
297	.long	0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
298	.long	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
299	.long	0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
300	.long	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
301	.long	0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
302	.long	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
303	.long	0xd192e819,0xd6990624,0xf40e3585,0x106aa070
304	.long	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
305	.long	0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
306	.long	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
307	.long	0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
308	.long	0	//terminator
309___
310$code.=<<___;
311.size	.LK$BITS,.-.LK$BITS
312.align	3
313.LOPENSSL_armcap_P:
314	.quad	OPENSSL_armcap_P-.
315.asciz	"SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
316.align	2
317___
318
319if ($SZ==4) {
320my $Ktbl="x3";
321
322my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
323my @MSG=map("v$_.16b",(4..7));
324my ($W0,$W1)=("v16.4s","v17.4s");
325my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
326
327$code.=<<___;
328.type	sha256_block_armv8,%function
329.align	6
330sha256_block_armv8:
331.Lv8_entry:
332	stp		x29,x30,[sp,#-16]!
333	add		x29,sp,#0
334
335	ld1.32		{$ABCD,$EFGH},[$ctx]
336	adr		$Ktbl,.LK256
337
338.Loop_hw:
339	ld1		{@MSG[0]-@MSG[3]},[$inp],#64
340	sub		$num,$num,#1
341	ld1.32		{$W0},[$Ktbl],#16
342	rev32		@MSG[0],@MSG[0]
343	rev32		@MSG[1],@MSG[1]
344	rev32		@MSG[2],@MSG[2]
345	rev32		@MSG[3],@MSG[3]
346	orr		$ABCD_SAVE,$ABCD,$ABCD		// offload
347	orr		$EFGH_SAVE,$EFGH,$EFGH
348___
349for($i=0;$i<12;$i++) {
350$code.=<<___;
351	ld1.32		{$W1},[$Ktbl],#16
352	add.i32		$W0,$W0,@MSG[0]
353	sha256su0	@MSG[0],@MSG[1]
354	orr		$abcd,$ABCD,$ABCD
355	sha256h		$ABCD,$EFGH,$W0
356	sha256h2	$EFGH,$abcd,$W0
357	sha256su1	@MSG[0],@MSG[2],@MSG[3]
358___
359	($W0,$W1)=($W1,$W0);	push(@MSG,shift(@MSG));
360}
361$code.=<<___;
362	ld1.32		{$W1},[$Ktbl],#16
363	add.i32		$W0,$W0,@MSG[0]
364	orr		$abcd,$ABCD,$ABCD
365	sha256h		$ABCD,$EFGH,$W0
366	sha256h2	$EFGH,$abcd,$W0
367
368	ld1.32		{$W0},[$Ktbl],#16
369	add.i32		$W1,$W1,@MSG[1]
370	orr		$abcd,$ABCD,$ABCD
371	sha256h		$ABCD,$EFGH,$W1
372	sha256h2	$EFGH,$abcd,$W1
373
374	ld1.32		{$W1},[$Ktbl]
375	add.i32		$W0,$W0,@MSG[2]
376	sub		$Ktbl,$Ktbl,#$rounds*$SZ-16	// rewind
377	orr		$abcd,$ABCD,$ABCD
378	sha256h		$ABCD,$EFGH,$W0
379	sha256h2	$EFGH,$abcd,$W0
380
381	add.i32		$W1,$W1,@MSG[3]
382	orr		$abcd,$ABCD,$ABCD
383	sha256h		$ABCD,$EFGH,$W1
384	sha256h2	$EFGH,$abcd,$W1
385
386	add.i32		$ABCD,$ABCD,$ABCD_SAVE
387	add.i32		$EFGH,$EFGH,$EFGH_SAVE
388
389	cbnz		$num,.Loop_hw
390
391	st1.32		{$ABCD,$EFGH},[$ctx]
392
393	ldr		x29,[sp],#16
394	ret
395.size	sha256_block_armv8,.-sha256_block_armv8
396___
397}
398
399$code.=<<___;
400.comm	OPENSSL_armcap_P,4,4
401___
402
403{   my  %opcode = (
404	"sha256h"	=> 0x5e004000,	"sha256h2"	=> 0x5e005000,
405	"sha256su0"	=> 0x5e282800,	"sha256su1"	=> 0x5e006000	);
406
407    sub unsha256 {
408	my ($mnemonic,$arg)=@_;
409
410	$arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
411	&&
412	sprintf ".inst\t0x%08x\t//%s %s",
413			$opcode{$mnemonic}|$1|($2<<5)|($3<<16),
414			$mnemonic,$arg;
415    }
416}
417
418foreach(split("\n",$code)) {
419
420	s/\`([^\`]*)\`/eval($1)/geo;
421
422	s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/geo;
423
424	s/\.\w?32\b//o		and s/\.16b/\.4s/go;
425	m/(ld|st)1[^\[]+\[0\]/o	and s/\.4s/\.s/go;
426
427	print $_,"\n";
428}
429
430close STDOUT;
431