1#! /usr/bin/env perl
2# Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
3#
4# Licensed under the OpenSSL license (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# Permission to use under GPL terms is granted.
17# ====================================================================
18
19# SHA512 block procedure for ARMv4. September 2007.
20
21# This code is ~4.5 (four and a half) times faster than code generated
22# by gcc 3.4 and it spends ~72 clock cycles per byte [on single-issue
23# Xscale PXA250 core].
24#
25# July 2010.
26#
27# Rescheduling for dual-issue pipeline resulted in 6% improvement on
28# Cortex A8 core and ~40 cycles per processed byte.
29
30# February 2011.
31#
32# Profiler-assisted and platform-specific optimization resulted in 7%
33# improvement on Coxtex A8 core and ~38 cycles per byte.
34
35# March 2011.
36#
37# Add NEON implementation. On Cortex A8 it was measured to process
38# one byte in 23.3 cycles or ~60% faster than integer-only code.
39
40# August 2012.
41#
42# Improve NEON performance by 12% on Snapdragon S4. In absolute
43# terms it's 22.6 cycles per byte, which is disappointing result.
44# Technical writers asserted that 3-way S4 pipeline can sustain
45# multiple NEON instructions per cycle, but dual NEON issue could
46# not be observed, see http://www.openssl.org/~appro/Snapdragon-S4.html
47# for further details. On side note Cortex-A15 processes one byte in
48# 16 cycles.
49
50# Byte order [in]dependence. =========================================
51#
52# Originally caller was expected to maintain specific *dword* order in
53# h[0-7], namely with most significant dword at *lower* address, which
54# was reflected in below two parameters as 0 and 4. Now caller is
55# expected to maintain native byte order for whole 64-bit values.
56$hi="HI";
57$lo="LO";
58# ====================================================================
59
60$flavour = shift;
61if ($flavour=~/\w[\w\-]*\.\w+$/) { $output=$flavour; undef $flavour; }
62else { while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {} }
63
64if ($flavour && $flavour ne "void") {
65    $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
66    ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
67    ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
68    die "can't locate arm-xlate.pl";
69
70    open STDOUT,"| \"$^X\" $xlate $flavour $output";
71} else {
72    open STDOUT,">$output";
73}
74
75$ctx="r0";	# parameter block
76$inp="r1";
77$len="r2";
78
79$Tlo="r3";
80$Thi="r4";
81$Alo="r5";
82$Ahi="r6";
83$Elo="r7";
84$Ehi="r8";
85$t0="r9";
86$t1="r10";
87$t2="r11";
88$t3="r12";
89############	r13 is stack pointer
90$Ktbl="r14";
91############	r15 is program counter
92
93$Aoff=8*0;
94$Boff=8*1;
95$Coff=8*2;
96$Doff=8*3;
97$Eoff=8*4;
98$Foff=8*5;
99$Goff=8*6;
100$Hoff=8*7;
101$Xoff=8*8;
102
103sub BODY_00_15() {
104my $magic = shift;
105$code.=<<___;
106	@ Sigma1(x)	(ROTR((x),14) ^ ROTR((x),18)  ^ ROTR((x),41))
107	@ LO		lo>>14^hi<<18 ^ lo>>18^hi<<14 ^ hi>>9^lo<<23
108	@ HI		hi>>14^lo<<18 ^ hi>>18^lo<<14 ^ lo>>9^hi<<23
109	mov	$t0,$Elo,lsr#14
110	str	$Tlo,[sp,#$Xoff+0]
111	mov	$t1,$Ehi,lsr#14
112	str	$Thi,[sp,#$Xoff+4]
113	eor	$t0,$t0,$Ehi,lsl#18
114	ldr	$t2,[sp,#$Hoff+0]	@ h.lo
115	eor	$t1,$t1,$Elo,lsl#18
116	ldr	$t3,[sp,#$Hoff+4]	@ h.hi
117	eor	$t0,$t0,$Elo,lsr#18
118	eor	$t1,$t1,$Ehi,lsr#18
119	eor	$t0,$t0,$Ehi,lsl#14
120	eor	$t1,$t1,$Elo,lsl#14
121	eor	$t0,$t0,$Ehi,lsr#9
122	eor	$t1,$t1,$Elo,lsr#9
123	eor	$t0,$t0,$Elo,lsl#23
124	eor	$t1,$t1,$Ehi,lsl#23	@ Sigma1(e)
125	adds	$Tlo,$Tlo,$t0
126	ldr	$t0,[sp,#$Foff+0]	@ f.lo
127	adc	$Thi,$Thi,$t1		@ T += Sigma1(e)
128	ldr	$t1,[sp,#$Foff+4]	@ f.hi
129	adds	$Tlo,$Tlo,$t2
130	ldr	$t2,[sp,#$Goff+0]	@ g.lo
131	adc	$Thi,$Thi,$t3		@ T += h
132	ldr	$t3,[sp,#$Goff+4]	@ g.hi
133
134	eor	$t0,$t0,$t2
135	str	$Elo,[sp,#$Eoff+0]
136	eor	$t1,$t1,$t3
137	str	$Ehi,[sp,#$Eoff+4]
138	and	$t0,$t0,$Elo
139	str	$Alo,[sp,#$Aoff+0]
140	and	$t1,$t1,$Ehi
141	str	$Ahi,[sp,#$Aoff+4]
142	eor	$t0,$t0,$t2
143	ldr	$t2,[$Ktbl,#$lo]	@ K[i].lo
144	eor	$t1,$t1,$t3		@ Ch(e,f,g)
145	ldr	$t3,[$Ktbl,#$hi]	@ K[i].hi
146
147	adds	$Tlo,$Tlo,$t0
148	ldr	$Elo,[sp,#$Doff+0]	@ d.lo
149	adc	$Thi,$Thi,$t1		@ T += Ch(e,f,g)
150	ldr	$Ehi,[sp,#$Doff+4]	@ d.hi
151	adds	$Tlo,$Tlo,$t2
152	and	$t0,$t2,#0xff
153	adc	$Thi,$Thi,$t3		@ T += K[i]
154	adds	$Elo,$Elo,$Tlo
155	ldr	$t2,[sp,#$Boff+0]	@ b.lo
156	adc	$Ehi,$Ehi,$Thi		@ d += T
157	teq	$t0,#$magic
158
159	ldr	$t3,[sp,#$Coff+0]	@ c.lo
160#ifdef	__thumb2__
161	it	eq			@ Thumb2 thing, sanity check in ARM
162#endif
163	orreq	$Ktbl,$Ktbl,#1
164	@ Sigma0(x)	(ROTR((x),28) ^ ROTR((x),34) ^ ROTR((x),39))
165	@ LO		lo>>28^hi<<4  ^ hi>>2^lo<<30 ^ hi>>7^lo<<25
166	@ HI		hi>>28^lo<<4  ^ lo>>2^hi<<30 ^ lo>>7^hi<<25
167	mov	$t0,$Alo,lsr#28
168	mov	$t1,$Ahi,lsr#28
169	eor	$t0,$t0,$Ahi,lsl#4
170	eor	$t1,$t1,$Alo,lsl#4
171	eor	$t0,$t0,$Ahi,lsr#2
172	eor	$t1,$t1,$Alo,lsr#2
173	eor	$t0,$t0,$Alo,lsl#30
174	eor	$t1,$t1,$Ahi,lsl#30
175	eor	$t0,$t0,$Ahi,lsr#7
176	eor	$t1,$t1,$Alo,lsr#7
177	eor	$t0,$t0,$Alo,lsl#25
178	eor	$t1,$t1,$Ahi,lsl#25	@ Sigma0(a)
179	adds	$Tlo,$Tlo,$t0
180	and	$t0,$Alo,$t2
181	adc	$Thi,$Thi,$t1		@ T += Sigma0(a)
182
183	ldr	$t1,[sp,#$Boff+4]	@ b.hi
184	orr	$Alo,$Alo,$t2
185	ldr	$t2,[sp,#$Coff+4]	@ c.hi
186	and	$Alo,$Alo,$t3
187	and	$t3,$Ahi,$t1
188	orr	$Ahi,$Ahi,$t1
189	orr	$Alo,$Alo,$t0		@ Maj(a,b,c).lo
190	and	$Ahi,$Ahi,$t2
191	adds	$Alo,$Alo,$Tlo
192	orr	$Ahi,$Ahi,$t3		@ Maj(a,b,c).hi
193	sub	sp,sp,#8
194	adc	$Ahi,$Ahi,$Thi		@ h += T
195	tst	$Ktbl,#1
196	add	$Ktbl,$Ktbl,#8
197___
198}
199$code=<<___;
200#ifndef __KERNEL__
201# include "arm_arch.h"
202# define VFP_ABI_PUSH	vstmdb	sp!,{d8-d15}
203# define VFP_ABI_POP	vldmia	sp!,{d8-d15}
204#else
205# define __ARM_ARCH__ __LINUX_ARM_ARCH__
206# define __ARM_MAX_ARCH__ 7
207# define VFP_ABI_PUSH
208# define VFP_ABI_POP
209#endif
210
211#ifdef __ARMEL__
212# define LO 0
213# define HI 4
214# define WORD64(hi0,lo0,hi1,lo1)	.word	lo0,hi0, lo1,hi1
215#else
216# define HI 0
217# define LO 4
218# define WORD64(hi0,lo0,hi1,lo1)	.word	hi0,lo0, hi1,lo1
219#endif
220
221.text
222#if defined(__thumb2__)
223.syntax unified
224.thumb
225# define adrl adr
226#else
227.code	32
228#endif
229
230.type	K512,%object
231.align	5
232K512:
233WORD64(0x428a2f98,0xd728ae22, 0x71374491,0x23ef65cd)
234WORD64(0xb5c0fbcf,0xec4d3b2f, 0xe9b5dba5,0x8189dbbc)
235WORD64(0x3956c25b,0xf348b538, 0x59f111f1,0xb605d019)
236WORD64(0x923f82a4,0xaf194f9b, 0xab1c5ed5,0xda6d8118)
237WORD64(0xd807aa98,0xa3030242, 0x12835b01,0x45706fbe)
238WORD64(0x243185be,0x4ee4b28c, 0x550c7dc3,0xd5ffb4e2)
239WORD64(0x72be5d74,0xf27b896f, 0x80deb1fe,0x3b1696b1)
240WORD64(0x9bdc06a7,0x25c71235, 0xc19bf174,0xcf692694)
241WORD64(0xe49b69c1,0x9ef14ad2, 0xefbe4786,0x384f25e3)
242WORD64(0x0fc19dc6,0x8b8cd5b5, 0x240ca1cc,0x77ac9c65)
243WORD64(0x2de92c6f,0x592b0275, 0x4a7484aa,0x6ea6e483)
244WORD64(0x5cb0a9dc,0xbd41fbd4, 0x76f988da,0x831153b5)
245WORD64(0x983e5152,0xee66dfab, 0xa831c66d,0x2db43210)
246WORD64(0xb00327c8,0x98fb213f, 0xbf597fc7,0xbeef0ee4)
247WORD64(0xc6e00bf3,0x3da88fc2, 0xd5a79147,0x930aa725)
248WORD64(0x06ca6351,0xe003826f, 0x14292967,0x0a0e6e70)
249WORD64(0x27b70a85,0x46d22ffc, 0x2e1b2138,0x5c26c926)
250WORD64(0x4d2c6dfc,0x5ac42aed, 0x53380d13,0x9d95b3df)
251WORD64(0x650a7354,0x8baf63de, 0x766a0abb,0x3c77b2a8)
252WORD64(0x81c2c92e,0x47edaee6, 0x92722c85,0x1482353b)
253WORD64(0xa2bfe8a1,0x4cf10364, 0xa81a664b,0xbc423001)
254WORD64(0xc24b8b70,0xd0f89791, 0xc76c51a3,0x0654be30)
255WORD64(0xd192e819,0xd6ef5218, 0xd6990624,0x5565a910)
256WORD64(0xf40e3585,0x5771202a, 0x106aa070,0x32bbd1b8)
257WORD64(0x19a4c116,0xb8d2d0c8, 0x1e376c08,0x5141ab53)
258WORD64(0x2748774c,0xdf8eeb99, 0x34b0bcb5,0xe19b48a8)
259WORD64(0x391c0cb3,0xc5c95a63, 0x4ed8aa4a,0xe3418acb)
260WORD64(0x5b9cca4f,0x7763e373, 0x682e6ff3,0xd6b2b8a3)
261WORD64(0x748f82ee,0x5defb2fc, 0x78a5636f,0x43172f60)
262WORD64(0x84c87814,0xa1f0ab72, 0x8cc70208,0x1a6439ec)
263WORD64(0x90befffa,0x23631e28, 0xa4506ceb,0xde82bde9)
264WORD64(0xbef9a3f7,0xb2c67915, 0xc67178f2,0xe372532b)
265WORD64(0xca273ece,0xea26619c, 0xd186b8c7,0x21c0c207)
266WORD64(0xeada7dd6,0xcde0eb1e, 0xf57d4f7f,0xee6ed178)
267WORD64(0x06f067aa,0x72176fba, 0x0a637dc5,0xa2c898a6)
268WORD64(0x113f9804,0xbef90dae, 0x1b710b35,0x131c471b)
269WORD64(0x28db77f5,0x23047d84, 0x32caab7b,0x40c72493)
270WORD64(0x3c9ebe0a,0x15c9bebc, 0x431d67c4,0x9c100d4c)
271WORD64(0x4cc5d4be,0xcb3e42b6, 0x597f299c,0xfc657e2a)
272WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
273.size	K512,.-K512
274#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
275.LOPENSSL_armcap:
276.word	OPENSSL_armcap_P-.Lsha512_block_data_order
277.skip	32-4
278#else
279.skip	32
280#endif
281
282.global	sha512_block_data_order
283.type	sha512_block_data_order,%function
284sha512_block_data_order:
285.Lsha512_block_data_order:
286#if __ARM_ARCH__<7 && !defined(__thumb2__)
287	sub	r3,pc,#8		@ sha512_block_data_order
288#else
289	adr	r3,.Lsha512_block_data_order
290#endif
291#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
292	ldr	r12,.LOPENSSL_armcap
293	ldr	r12,[r3,r12]		@ OPENSSL_armcap_P
294#ifdef	__APPLE__
295	ldr	r12,[r12]
296#endif
297	tst	r12,#ARMV7_NEON
298	bne	.LNEON
299#endif
300	add	$len,$inp,$len,lsl#7	@ len to point at the end of inp
301	stmdb	sp!,{r4-r12,lr}
302	sub	$Ktbl,r3,#672		@ K512
303	sub	sp,sp,#9*8
304
305	ldr	$Elo,[$ctx,#$Eoff+$lo]
306	ldr	$Ehi,[$ctx,#$Eoff+$hi]
307	ldr	$t0, [$ctx,#$Goff+$lo]
308	ldr	$t1, [$ctx,#$Goff+$hi]
309	ldr	$t2, [$ctx,#$Hoff+$lo]
310	ldr	$t3, [$ctx,#$Hoff+$hi]
311.Loop:
312	str	$t0, [sp,#$Goff+0]
313	str	$t1, [sp,#$Goff+4]
314	str	$t2, [sp,#$Hoff+0]
315	str	$t3, [sp,#$Hoff+4]
316	ldr	$Alo,[$ctx,#$Aoff+$lo]
317	ldr	$Ahi,[$ctx,#$Aoff+$hi]
318	ldr	$Tlo,[$ctx,#$Boff+$lo]
319	ldr	$Thi,[$ctx,#$Boff+$hi]
320	ldr	$t0, [$ctx,#$Coff+$lo]
321	ldr	$t1, [$ctx,#$Coff+$hi]
322	ldr	$t2, [$ctx,#$Doff+$lo]
323	ldr	$t3, [$ctx,#$Doff+$hi]
324	str	$Tlo,[sp,#$Boff+0]
325	str	$Thi,[sp,#$Boff+4]
326	str	$t0, [sp,#$Coff+0]
327	str	$t1, [sp,#$Coff+4]
328	str	$t2, [sp,#$Doff+0]
329	str	$t3, [sp,#$Doff+4]
330	ldr	$Tlo,[$ctx,#$Foff+$lo]
331	ldr	$Thi,[$ctx,#$Foff+$hi]
332	str	$Tlo,[sp,#$Foff+0]
333	str	$Thi,[sp,#$Foff+4]
334
335.L00_15:
336#if __ARM_ARCH__<7
337	ldrb	$Tlo,[$inp,#7]
338	ldrb	$t0, [$inp,#6]
339	ldrb	$t1, [$inp,#5]
340	ldrb	$t2, [$inp,#4]
341	ldrb	$Thi,[$inp,#3]
342	ldrb	$t3, [$inp,#2]
343	orr	$Tlo,$Tlo,$t0,lsl#8
344	ldrb	$t0, [$inp,#1]
345	orr	$Tlo,$Tlo,$t1,lsl#16
346	ldrb	$t1, [$inp],#8
347	orr	$Tlo,$Tlo,$t2,lsl#24
348	orr	$Thi,$Thi,$t3,lsl#8
349	orr	$Thi,$Thi,$t0,lsl#16
350	orr	$Thi,$Thi,$t1,lsl#24
351#else
352	ldr	$Tlo,[$inp,#4]
353	ldr	$Thi,[$inp],#8
354#ifdef __ARMEL__
355	rev	$Tlo,$Tlo
356	rev	$Thi,$Thi
357#endif
358#endif
359___
360	&BODY_00_15(0x94);
361$code.=<<___;
362	tst	$Ktbl,#1
363	beq	.L00_15
364	ldr	$t0,[sp,#`$Xoff+8*(16-1)`+0]
365	ldr	$t1,[sp,#`$Xoff+8*(16-1)`+4]
366	bic	$Ktbl,$Ktbl,#1
367.L16_79:
368	@ sigma0(x)	(ROTR((x),1)  ^ ROTR((x),8)  ^ ((x)>>7))
369	@ LO		lo>>1^hi<<31  ^ lo>>8^hi<<24 ^ lo>>7^hi<<25
370	@ HI		hi>>1^lo<<31  ^ hi>>8^lo<<24 ^ hi>>7
371	mov	$Tlo,$t0,lsr#1
372	ldr	$t2,[sp,#`$Xoff+8*(16-14)`+0]
373	mov	$Thi,$t1,lsr#1
374	ldr	$t3,[sp,#`$Xoff+8*(16-14)`+4]
375	eor	$Tlo,$Tlo,$t1,lsl#31
376	eor	$Thi,$Thi,$t0,lsl#31
377	eor	$Tlo,$Tlo,$t0,lsr#8
378	eor	$Thi,$Thi,$t1,lsr#8
379	eor	$Tlo,$Tlo,$t1,lsl#24
380	eor	$Thi,$Thi,$t0,lsl#24
381	eor	$Tlo,$Tlo,$t0,lsr#7
382	eor	$Thi,$Thi,$t1,lsr#7
383	eor	$Tlo,$Tlo,$t1,lsl#25
384
385	@ sigma1(x)	(ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6))
386	@ LO		lo>>19^hi<<13 ^ hi>>29^lo<<3 ^ lo>>6^hi<<26
387	@ HI		hi>>19^lo<<13 ^ lo>>29^hi<<3 ^ hi>>6
388	mov	$t0,$t2,lsr#19
389	mov	$t1,$t3,lsr#19
390	eor	$t0,$t0,$t3,lsl#13
391	eor	$t1,$t1,$t2,lsl#13
392	eor	$t0,$t0,$t3,lsr#29
393	eor	$t1,$t1,$t2,lsr#29
394	eor	$t0,$t0,$t2,lsl#3
395	eor	$t1,$t1,$t3,lsl#3
396	eor	$t0,$t0,$t2,lsr#6
397	eor	$t1,$t1,$t3,lsr#6
398	ldr	$t2,[sp,#`$Xoff+8*(16-9)`+0]
399	eor	$t0,$t0,$t3,lsl#26
400
401	ldr	$t3,[sp,#`$Xoff+8*(16-9)`+4]
402	adds	$Tlo,$Tlo,$t0
403	ldr	$t0,[sp,#`$Xoff+8*16`+0]
404	adc	$Thi,$Thi,$t1
405
406	ldr	$t1,[sp,#`$Xoff+8*16`+4]
407	adds	$Tlo,$Tlo,$t2
408	adc	$Thi,$Thi,$t3
409	adds	$Tlo,$Tlo,$t0
410	adc	$Thi,$Thi,$t1
411___
412	&BODY_00_15(0x17);
413$code.=<<___;
414#ifdef	__thumb2__
415	ittt	eq			@ Thumb2 thing, sanity check in ARM
416#endif
417	ldreq	$t0,[sp,#`$Xoff+8*(16-1)`+0]
418	ldreq	$t1,[sp,#`$Xoff+8*(16-1)`+4]
419	beq	.L16_79
420	bic	$Ktbl,$Ktbl,#1
421
422	ldr	$Tlo,[sp,#$Boff+0]
423	ldr	$Thi,[sp,#$Boff+4]
424	ldr	$t0, [$ctx,#$Aoff+$lo]
425	ldr	$t1, [$ctx,#$Aoff+$hi]
426	ldr	$t2, [$ctx,#$Boff+$lo]
427	ldr	$t3, [$ctx,#$Boff+$hi]
428	adds	$t0,$Alo,$t0
429	str	$t0, [$ctx,#$Aoff+$lo]
430	adc	$t1,$Ahi,$t1
431	str	$t1, [$ctx,#$Aoff+$hi]
432	adds	$t2,$Tlo,$t2
433	str	$t2, [$ctx,#$Boff+$lo]
434	adc	$t3,$Thi,$t3
435	str	$t3, [$ctx,#$Boff+$hi]
436
437	ldr	$Alo,[sp,#$Coff+0]
438	ldr	$Ahi,[sp,#$Coff+4]
439	ldr	$Tlo,[sp,#$Doff+0]
440	ldr	$Thi,[sp,#$Doff+4]
441	ldr	$t0, [$ctx,#$Coff+$lo]
442	ldr	$t1, [$ctx,#$Coff+$hi]
443	ldr	$t2, [$ctx,#$Doff+$lo]
444	ldr	$t3, [$ctx,#$Doff+$hi]
445	adds	$t0,$Alo,$t0
446	str	$t0, [$ctx,#$Coff+$lo]
447	adc	$t1,$Ahi,$t1
448	str	$t1, [$ctx,#$Coff+$hi]
449	adds	$t2,$Tlo,$t2
450	str	$t2, [$ctx,#$Doff+$lo]
451	adc	$t3,$Thi,$t3
452	str	$t3, [$ctx,#$Doff+$hi]
453
454	ldr	$Tlo,[sp,#$Foff+0]
455	ldr	$Thi,[sp,#$Foff+4]
456	ldr	$t0, [$ctx,#$Eoff+$lo]
457	ldr	$t1, [$ctx,#$Eoff+$hi]
458	ldr	$t2, [$ctx,#$Foff+$lo]
459	ldr	$t3, [$ctx,#$Foff+$hi]
460	adds	$Elo,$Elo,$t0
461	str	$Elo,[$ctx,#$Eoff+$lo]
462	adc	$Ehi,$Ehi,$t1
463	str	$Ehi,[$ctx,#$Eoff+$hi]
464	adds	$t2,$Tlo,$t2
465	str	$t2, [$ctx,#$Foff+$lo]
466	adc	$t3,$Thi,$t3
467	str	$t3, [$ctx,#$Foff+$hi]
468
469	ldr	$Alo,[sp,#$Goff+0]
470	ldr	$Ahi,[sp,#$Goff+4]
471	ldr	$Tlo,[sp,#$Hoff+0]
472	ldr	$Thi,[sp,#$Hoff+4]
473	ldr	$t0, [$ctx,#$Goff+$lo]
474	ldr	$t1, [$ctx,#$Goff+$hi]
475	ldr	$t2, [$ctx,#$Hoff+$lo]
476	ldr	$t3, [$ctx,#$Hoff+$hi]
477	adds	$t0,$Alo,$t0
478	str	$t0, [$ctx,#$Goff+$lo]
479	adc	$t1,$Ahi,$t1
480	str	$t1, [$ctx,#$Goff+$hi]
481	adds	$t2,$Tlo,$t2
482	str	$t2, [$ctx,#$Hoff+$lo]
483	adc	$t3,$Thi,$t3
484	str	$t3, [$ctx,#$Hoff+$hi]
485
486	add	sp,sp,#640
487	sub	$Ktbl,$Ktbl,#640
488
489	teq	$inp,$len
490	bne	.Loop
491
492	add	sp,sp,#8*9		@ destroy frame
493#if __ARM_ARCH__>=5
494	ldmia	sp!,{r4-r12,pc}
495#else
496	ldmia	sp!,{r4-r12,lr}
497	tst	lr,#1
498	moveq	pc,lr			@ be binary compatible with V4, yet
499	bx	lr			@ interoperable with Thumb ISA:-)
500#endif
501.size	sha512_block_data_order,.-sha512_block_data_order
502___
503
504{
505my @Sigma0=(28,34,39);
506my @Sigma1=(14,18,41);
507my @sigma0=(1, 8, 7);
508my @sigma1=(19,61,6);
509
510my $Ktbl="r3";
511my $cnt="r12";	# volatile register known as ip, intra-procedure-call scratch
512
513my @X=map("d$_",(0..15));
514my @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("d$_",(16..23));
515
516sub NEON_00_15() {
517my $i=shift;
518my ($a,$b,$c,$d,$e,$f,$g,$h)=@_;
519my ($t0,$t1,$t2,$T1,$K,$Ch,$Maj)=map("d$_",(24..31));	# temps
520
521$code.=<<___ if ($i<16 || $i&1);
522	vshr.u64	$t0,$e,#@Sigma1[0]	@ $i
523#if $i<16
524	vld1.64		{@X[$i%16]},[$inp]!	@ handles unaligned
525#endif
526	vshr.u64	$t1,$e,#@Sigma1[1]
527#if $i>0
528	 vadd.i64	$a,$Maj			@ h+=Maj from the past
529#endif
530	vshr.u64	$t2,$e,#@Sigma1[2]
531___
532$code.=<<___;
533	vld1.64		{$K},[$Ktbl,:64]!	@ K[i++]
534	vsli.64		$t0,$e,#`64-@Sigma1[0]`
535	vsli.64		$t1,$e,#`64-@Sigma1[1]`
536	vmov		$Ch,$e
537	vsli.64		$t2,$e,#`64-@Sigma1[2]`
538#if $i<16 && defined(__ARMEL__)
539	vrev64.8	@X[$i],@X[$i]
540#endif
541	veor		$t1,$t0
542	vbsl		$Ch,$f,$g		@ Ch(e,f,g)
543	vshr.u64	$t0,$a,#@Sigma0[0]
544	veor		$t2,$t1			@ Sigma1(e)
545	vadd.i64	$T1,$Ch,$h
546	vshr.u64	$t1,$a,#@Sigma0[1]
547	vsli.64		$t0,$a,#`64-@Sigma0[0]`
548	vadd.i64	$T1,$t2
549	vshr.u64	$t2,$a,#@Sigma0[2]
550	vadd.i64	$K,@X[$i%16]
551	vsli.64		$t1,$a,#`64-@Sigma0[1]`
552	veor		$Maj,$a,$b
553	vsli.64		$t2,$a,#`64-@Sigma0[2]`
554	veor		$h,$t0,$t1
555	vadd.i64	$T1,$K
556	vbsl		$Maj,$c,$b		@ Maj(a,b,c)
557	veor		$h,$t2			@ Sigma0(a)
558	vadd.i64	$d,$T1
559	vadd.i64	$Maj,$T1
560	@ vadd.i64	$h,$Maj
561___
562}
563
564sub NEON_16_79() {
565my $i=shift;
566
567if ($i&1)	{ &NEON_00_15($i,@_); return; }
568
569# 2x-vectorized, therefore runs every 2nd round
570my @X=map("q$_",(0..7));			# view @X as 128-bit vector
571my ($t0,$t1,$s0,$s1) = map("q$_",(12..15));	# temps
572my ($d0,$d1,$d2) = map("d$_",(24..26));		# temps from NEON_00_15
573my $e=@_[4];					# $e from NEON_00_15
574$i /= 2;
575$code.=<<___;
576	vshr.u64	$t0,@X[($i+7)%8],#@sigma1[0]
577	vshr.u64	$t1,@X[($i+7)%8],#@sigma1[1]
578	 vadd.i64	@_[0],d30			@ h+=Maj from the past
579	vshr.u64	$s1,@X[($i+7)%8],#@sigma1[2]
580	vsli.64		$t0,@X[($i+7)%8],#`64-@sigma1[0]`
581	vext.8		$s0,@X[$i%8],@X[($i+1)%8],#8	@ X[i+1]
582	vsli.64		$t1,@X[($i+7)%8],#`64-@sigma1[1]`
583	veor		$s1,$t0
584	vshr.u64	$t0,$s0,#@sigma0[0]
585	veor		$s1,$t1				@ sigma1(X[i+14])
586	vshr.u64	$t1,$s0,#@sigma0[1]
587	vadd.i64	@X[$i%8],$s1
588	vshr.u64	$s1,$s0,#@sigma0[2]
589	vsli.64		$t0,$s0,#`64-@sigma0[0]`
590	vsli.64		$t1,$s0,#`64-@sigma0[1]`
591	vext.8		$s0,@X[($i+4)%8],@X[($i+5)%8],#8	@ X[i+9]
592	veor		$s1,$t0
593	vshr.u64	$d0,$e,#@Sigma1[0]		@ from NEON_00_15
594	vadd.i64	@X[$i%8],$s0
595	vshr.u64	$d1,$e,#@Sigma1[1]		@ from NEON_00_15
596	veor		$s1,$t1				@ sigma0(X[i+1])
597	vshr.u64	$d2,$e,#@Sigma1[2]		@ from NEON_00_15
598	vadd.i64	@X[$i%8],$s1
599___
600	&NEON_00_15(2*$i,@_);
601}
602
603$code.=<<___;
604#if __ARM_MAX_ARCH__>=7
605.arch	armv7-a
606.fpu	neon
607
608.global	sha512_block_data_order_neon
609.type	sha512_block_data_order_neon,%function
610.align	4
611sha512_block_data_order_neon:
612.LNEON:
613	dmb				@ errata #451034 on early Cortex A8
614	add	$len,$inp,$len,lsl#7	@ len to point at the end of inp
615	adr	$Ktbl,K512
616	VFP_ABI_PUSH
617	vldmia	$ctx,{$A-$H}		@ load context
618.Loop_neon:
619___
620for($i=0;$i<16;$i++)	{ &NEON_00_15($i,@V); unshift(@V,pop(@V)); }
621$code.=<<___;
622	mov		$cnt,#4
623.L16_79_neon:
624	subs		$cnt,#1
625___
626for(;$i<32;$i++)	{ &NEON_16_79($i,@V); unshift(@V,pop(@V)); }
627$code.=<<___;
628	bne		.L16_79_neon
629
630	 vadd.i64	$A,d30		@ h+=Maj from the past
631	vldmia		$ctx,{d24-d31}	@ load context to temp
632	vadd.i64	q8,q12		@ vectorized accumulate
633	vadd.i64	q9,q13
634	vadd.i64	q10,q14
635	vadd.i64	q11,q15
636	vstmia		$ctx,{$A-$H}	@ save context
637	teq		$inp,$len
638	sub		$Ktbl,#640	@ rewind K512
639	bne		.Loop_neon
640
641	VFP_ABI_POP
642	ret				@ bx lr
643.size	sha512_block_data_order_neon,.-sha512_block_data_order_neon
644#endif
645___
646}
647$code.=<<___;
648.asciz	"SHA512 block transform for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
649.align	2
650#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
651.comm	OPENSSL_armcap_P,4,4
652#endif
653___
654
655$code =~ s/\`([^\`]*)\`/eval $1/gem;
656$code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm;	# make it possible to compile with -march=armv4
657$code =~ s/\bret\b/bx	lr/gm;
658
659open SELF,$0;
660while(<SELF>) {
661	next if (/^#!/);
662	last if (!s/^#/@/ and !/^$/);
663	print;
664}
665close SELF;
666
667print $code;
668close STDOUT or die "error closing STDOUT: $!"; # enforce flush
669