aboutsummaryrefslogtreecommitdiff
path: root/openssl/crypto/sha/asm/sha512-ppc.pl
blob: 734f3c1ca0f092ffa316317b117048433fe5ded7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
#!/usr/bin/env perl

# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see http://www.openssl.org/~appro/cryptogams/.
# ====================================================================

# I let hardware handle unaligned input, except on page boundaries
# (see below for details). Otherwise straightforward implementation
# with X vector in register bank.

#			sha256		|	sha512
# 			-m64	-m32	|	-m64	-m32
# --------------------------------------+-----------------------
# PPC970,gcc-4.0.0	+50%	+38%	|	+40%	+410%(*)
# Power6,xlc-7		+150%	+90%	|	+100%	+430%(*)
#
# (*)	64-bit code in 32-bit application context, which actually is
#	on TODO list. It should be noted that for safe deployment in
#	32-bit *mutli-threaded* context asyncronous signals should be
#	blocked upon entry to SHA512 block routine. This is because
#	32-bit signaling procedure invalidates upper halves of GPRs.
#	Context switch procedure preserves them, but not signaling:-(

# Second version is true multi-thread safe. Trouble with the original
# version was that it was using thread local storage pointer register.
# Well, it scrupulously preserved it, but the problem would arise the
# moment asynchronous signal was delivered and signal handler would
# dereference the TLS pointer. While it's never the case in openssl
# application or test suite, we have to respect this scenario and not
# use TLS pointer register. Alternative would be to require caller to
# block signals prior calling this routine. For the record, in 32-bit
# context R2 serves as TLS pointer, while in 64-bit context - R13.

$flavour=shift;
$output =shift;

if ($flavour =~ /64/) {
	$SIZE_T=8;
	$LRSAVE=2*$SIZE_T;
	$STU="stdu";
	$UCMP="cmpld";
	$SHL="sldi";
	$POP="ld";
	$PUSH="std";
} elsif ($flavour =~ /32/) {
	$SIZE_T=4;
	$LRSAVE=$SIZE_T;
	$STU="stwu";
	$UCMP="cmplw";
	$SHL="slwi";
	$POP="lwz";
	$PUSH="stw";
} else { die "nonsense $flavour"; }

$LITTLE_ENDIAN = ($flavour=~/le$/) ? $SIZE_T : 0;

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

open STDOUT,"| $^X $xlate $flavour $output" || die "can't call $xlate: $!";

if ($output =~ /512/) {
	$func="sha512_block_ppc";
	$SZ=8;
	@Sigma0=(28,34,39);
	@Sigma1=(14,18,41);
	@sigma0=(1,  8, 7);
	@sigma1=(19,61, 6);
	$rounds=80;
	$LD="ld";
	$ST="std";
	$ROR="rotrdi";
	$SHR="srdi";
} else {
	$func="sha256_block_ppc";
	$SZ=4;
	@Sigma0=( 2,13,22);
	@Sigma1=( 6,11,25);
	@sigma0=( 7,18, 3);
	@sigma1=(17,19,10);
	$rounds=64;
	$LD="lwz";
	$ST="stw";
	$ROR="rotrwi";
	$SHR="srwi";
}

$FRAME=32*$SIZE_T+16*$SZ;
$LOCALS=6*$SIZE_T;

$sp ="r1";
$toc="r2";
$ctx="r3";	# zapped by $a0
$inp="r4";	# zapped by $a1
$num="r5";	# zapped by $t0

$T  ="r0";
$a0 ="r3";
$a1 ="r4";
$t0 ="r5";
$t1 ="r6";
$Tbl="r7";

$A  ="r8";
$B  ="r9";
$C  ="r10";
$D  ="r11";
$E  ="r12";
$F  =$t1;	$t1 = "r0";	# stay away from "r13";
$G  ="r14";
$H  ="r15";

@V=($A,$B,$C,$D,$E,$F,$G,$H);
@X=("r16","r17","r18","r19","r20","r21","r22","r23",
    "r24","r25","r26","r27","r28","r29","r30","r31");

$inp="r31" if($SZ==4 || $SIZE_T==8);	# reassigned $inp! aliases with @X[15]

sub ROUND_00_15 {
my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
$code.=<<___;
	$ROR	$a0,$e,$Sigma1[0]
	$ROR	$a1,$e,$Sigma1[1]
	and	$t0,$f,$e
	xor	$a0,$a0,$a1
	add	$h,$h,$t1
	andc	$t1,$g,$e
	$ROR	$a1,$a1,`$Sigma1[2]-$Sigma1[1]`
	or	$t0,$t0,$t1		; Ch(e,f,g)
	add	$h,$h,@X[$i%16]
	xor	$a0,$a0,$a1		; Sigma1(e)
	add	$h,$h,$t0
	add	$h,$h,$a0

	$ROR	$a0,$a,$Sigma0[0]
	$ROR	$a1,$a,$Sigma0[1]
	and	$t0,$a,$b
	and	$t1,$a,$c
	xor	$a0,$a0,$a1
	$ROR	$a1,$a1,`$Sigma0[2]-$Sigma0[1]`
	xor	$t0,$t0,$t1
	and	$t1,$b,$c
	xor	$a0,$a0,$a1		; Sigma0(a)
	add	$d,$d,$h
	xor	$t0,$t0,$t1		; Maj(a,b,c)
___
$code.=<<___ if ($i<15);
	$LD	$t1,`($i+1)*$SZ`($Tbl)
___
$code.=<<___;
	add	$h,$h,$a0
	add	$h,$h,$t0

___
}

sub ROUND_16_xx {
my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
$i-=16;
$code.=<<___;
	$ROR	$a0,@X[($i+1)%16],$sigma0[0]
	$ROR	$a1,@X[($i+1)%16],$sigma0[1]
	$ROR	$t0,@X[($i+14)%16],$sigma1[0]
	$ROR	$t1,@X[($i+14)%16],$sigma1[1]
	xor	$a0,$a0,$a1
	$SHR	$a1,@X[($i+1)%16],$sigma0[2]
	xor	$t0,$t0,$t1
	$SHR	$t1,@X[($i+14)%16],$sigma1[2]
	add	@X[$i],@X[$i],@X[($i+9)%16]
	xor	$a0,$a0,$a1		; sigma0(X[(i+1)&0x0f])
	xor	$t0,$t0,$t1		; sigma1(X[(i+14)&0x0f])
	$LD	$t1,`$i*$SZ`($Tbl)
	add	@X[$i],@X[$i],$a0
	add	@X[$i],@X[$i],$t0
___
&ROUND_00_15($i+16,$a,$b,$c,$d,$e,$f,$g,$h);
}

$code=<<___;
.machine	"any"
.text

.globl	$func
.align	6
$func:
	$STU	$sp,-$FRAME($sp)
	mflr	r0
	$SHL	$num,$num,`log(16*$SZ)/log(2)`

	$PUSH	$ctx,`$FRAME-$SIZE_T*22`($sp)

	$PUSH	r14,`$FRAME-$SIZE_T*18`($sp)
	$PUSH	r15,`$FRAME-$SIZE_T*17`($sp)
	$PUSH	r16,`$FRAME-$SIZE_T*16`($sp)
	$PUSH	r17,`$FRAME-$SIZE_T*15`($sp)
	$PUSH	r18,`$FRAME-$SIZE_T*14`($sp)
	$PUSH	r19,`$FRAME-$SIZE_T*13`($sp)
	$PUSH	r20,`$FRAME-$SIZE_T*12`($sp)
	$PUSH	r21,`$FRAME-$SIZE_T*11`($sp)
	$PUSH	r22,`$FRAME-$SIZE_T*10`($sp)
	$PUSH	r23,`$FRAME-$SIZE_T*9`($sp)
	$PUSH	r24,`$FRAME-$SIZE_T*8`($sp)
	$PUSH	r25,`$FRAME-$SIZE_T*7`($sp)
	$PUSH	r26,`$FRAME-$SIZE_T*6`($sp)
	$PUSH	r27,`$FRAME-$SIZE_T*5`($sp)
	$PUSH	r28,`$FRAME-$SIZE_T*4`($sp)
	$PUSH	r29,`$FRAME-$SIZE_T*3`($sp)
	$PUSH	r30,`$FRAME-$SIZE_T*2`($sp)
	$PUSH	r31,`$FRAME-$SIZE_T*1`($sp)
	$PUSH	r0,`$FRAME+$LRSAVE`($sp)
___

if ($SZ==4 || $SIZE_T==8) {
$code.=<<___;
	$LD	$A,`0*$SZ`($ctx)
	mr	$inp,r4				; incarnate $inp
	$LD	$B,`1*$SZ`($ctx)
	$LD	$C,`2*$SZ`($ctx)
	$LD	$D,`3*$SZ`($ctx)
	$LD	$E,`4*$SZ`($ctx)
	$LD	$F,`5*$SZ`($ctx)
	$LD	$G,`6*$SZ`($ctx)
	$LD	$H,`7*$SZ`($ctx)
___
} else {
  for ($i=16;$i<32;$i++) {
    $code.=<<___;
	lwz	r$i,`$LITTLE_ENDIAN^(4*($i-16))`($ctx)
___
  }
}

$code.=<<___;
	bl	LPICmeup
LPICedup:
	andi.	r0,$inp,3
	bne	Lunaligned
Laligned:
	add	$num,$inp,$num
	$PUSH	$num,`$FRAME-$SIZE_T*24`($sp)	; end pointer
	$PUSH	$inp,`$FRAME-$SIZE_T*23`($sp)	; inp pointer
	bl	Lsha2_block_private
	b	Ldone

; PowerPC specification allows an implementation to be ill-behaved
; upon unaligned access which crosses page boundary. "Better safe
; than sorry" principle makes me treat it specially. But I don't
; look for particular offending word, but rather for the input
; block which crosses the boundary. Once found that block is aligned
; and hashed separately...
.align	4
Lunaligned:
	subfic	$t1,$inp,4096
	andi.	$t1,$t1,`4096-16*$SZ`	; distance to closest page boundary
	beq	Lcross_page
	$UCMP	$num,$t1
	ble-	Laligned		; didn't cross the page boundary
	subfc	$num,$t1,$num
	add	$t1,$inp,$t1
	$PUSH	$num,`$FRAME-$SIZE_T*25`($sp)	; save real remaining num
	$PUSH	$t1,`$FRAME-$SIZE_T*24`($sp)	; intermediate end pointer
	$PUSH	$inp,`$FRAME-$SIZE_T*23`($sp)	; inp pointer
	bl	Lsha2_block_private
	; $inp equals to the intermediate end pointer here
	$POP	$num,`$FRAME-$SIZE_T*25`($sp)	; restore real remaining num
Lcross_page:
	li	$t1,`16*$SZ/4`
	mtctr	$t1
___
if ($SZ==4 || $SIZE_T==8) {
$code.=<<___;
	addi	r20,$sp,$LOCALS			; aligned spot below the frame
Lmemcpy:
	lbz	r16,0($inp)
	lbz	r17,1($inp)
	lbz	r18,2($inp)
	lbz	r19,3($inp)
	addi	$inp,$inp,4
	stb	r16,0(r20)
	stb	r17,1(r20)
	stb	r18,2(r20)
	stb	r19,3(r20)
	addi	r20,r20,4
	bdnz	Lmemcpy
___
} else {
$code.=<<___;
	addi	r12,$sp,$LOCALS			; aligned spot below the frame
Lmemcpy:
	lbz	r8,0($inp)
	lbz	r9,1($inp)
	lbz	r10,2($inp)
	lbz	r11,3($inp)
	addi	$inp,$inp,4
	stb	r8,0(r12)
	stb	r9,1(r12)
	stb	r10,2(r12)
	stb	r11,3(r12)
	addi	r12,r12,4
	bdnz	Lmemcpy
___
}

$code.=<<___;
	$PUSH	$inp,`$FRAME-$SIZE_T*26`($sp)	; save real inp
	addi	$t1,$sp,`$LOCALS+16*$SZ`	; fictitious end pointer
	addi	$inp,$sp,$LOCALS		; fictitious inp pointer
	$PUSH	$num,`$FRAME-$SIZE_T*25`($sp)	; save real num
	$PUSH	$t1,`$FRAME-$SIZE_T*24`($sp)	; end pointer
	$PUSH	$inp,`$FRAME-$SIZE_T*23`($sp)	; inp pointer
	bl	Lsha2_block_private
	$POP	$inp,`$FRAME-$SIZE_T*26`($sp)	; restore real inp
	$POP	$num,`$FRAME-$SIZE_T*25`($sp)	; restore real num
	addic.	$num,$num,`-16*$SZ`		; num--
	bne-	Lunaligned

Ldone:
	$POP	r0,`$FRAME+$LRSAVE`($sp)
	$POP	r14,`$FRAME-$SIZE_T*18`($sp)
	$POP	r15,`$FRAME-$SIZE_T*17`($sp)
	$POP	r16,`$FRAME-$SIZE_T*16`($sp)
	$POP	r17,`$FRAME-$SIZE_T*15`($sp)
	$POP	r18,`$FRAME-$SIZE_T*14`($sp)
	$POP	r19,`$FRAME-$SIZE_T*13`($sp)
	$POP	r20,`$FRAME-$SIZE_T*12`($sp)
	$POP	r21,`$FRAME-$SIZE_T*11`($sp)
	$POP	r22,`$FRAME-$SIZE_T*10`($sp)
	$POP	r23,`$FRAME-$SIZE_T*9`($sp)
	$POP	r24,`$FRAME-$SIZE_T*8`($sp)
	$POP	r25,`$FRAME-$SIZE_T*7`($sp)
	$POP	r26,`$FRAME-$SIZE_T*6`($sp)
	$POP	r27,`$FRAME-$SIZE_T*5`($sp)
	$POP	r28,`$FRAME-$SIZE_T*4`($sp)
	$POP	r29,`$FRAME-$SIZE_T*3`($sp)
	$POP	r30,`$FRAME-$SIZE_T*2`($sp)
	$POP	r31,`$FRAME-$SIZE_T*1`($sp)
	mtlr	r0
	addi	$sp,$sp,$FRAME
	blr
	.long	0
	.byte	0,12,4,1,0x80,18,3,0
	.long	0
___

if ($SZ==4 || $SIZE_T==8) {
$code.=<<___;
.align	4
Lsha2_block_private:
	$LD	$t1,0($Tbl)
___
for($i=0;$i<16;$i++) {
$code.=<<___ if ($SZ==4 && !$LITTLE_ENDIAN);
	lwz	@X[$i],`$i*$SZ`($inp)
___
$code.=<<___ if ($SZ==4 && $LITTLE_ENDIAN);
	lwz	$a0,`$i*$SZ`($inp)
	rotlwi	@X[$i],$a0,8
	rlwimi	@X[$i],$a0,24,0,7
	rlwimi	@X[$i],$a0,24,16,23
___
# 64-bit loads are split to 2x32-bit ones, as CPU can't handle
# unaligned 64-bit loads, only 32-bit ones...
$code.=<<___ if ($SZ==8 && !$LITTLE_ENDIAN);
	lwz	$t0,`$i*$SZ`($inp)
	lwz	@X[$i],`$i*$SZ+4`($inp)
	insrdi	@X[$i],$t0,32,0
___
$code.=<<___ if ($SZ==8 && $LITTLE_ENDIAN);
	lwz	$a0,`$i*$SZ`($inp)
	 lwz	$a1,`$i*$SZ+4`($inp)
	rotlwi	$t0,$a0,8
	 rotlwi	@X[$i],$a1,8
	rlwimi	$t0,$a0,24,0,7
	 rlwimi	@X[$i],$a1,24,0,7
	rlwimi	$t0,$a0,24,16,23
	 rlwimi	@X[$i],$a1,24,16,23
	insrdi	@X[$i],$t0,32,0
___
	&ROUND_00_15($i,@V);
	unshift(@V,pop(@V));
}
$code.=<<___;
	li	$t0,`$rounds/16-1`
	mtctr	$t0
.align	4
Lrounds:
	addi	$Tbl,$Tbl,`16*$SZ`
___
for(;$i<32;$i++) {
	&ROUND_16_xx($i,@V);
	unshift(@V,pop(@V));
}
$code.=<<___;
	bdnz-	Lrounds

	$POP	$ctx,`$FRAME-$SIZE_T*22`($sp)
	$POP	$inp,`$FRAME-$SIZE_T*23`($sp)	; inp pointer
	$POP	$num,`$FRAME-$SIZE_T*24`($sp)	; end pointer
	subi	$Tbl,$Tbl,`($rounds-16)*$SZ`	; rewind Tbl

	$LD	r16,`0*$SZ`($ctx)
	$LD	r17,`1*$SZ`($ctx)
	$LD	r18,`2*$SZ`($ctx)
	$LD	r19,`3*$SZ`($ctx)
	$LD	r20,`4*$SZ`($ctx)
	$LD	r21,`5*$SZ`($ctx)
	$LD	r22,`6*$SZ`($ctx)
	addi	$inp,$inp,`16*$SZ`		; advance inp
	$LD	r23,`7*$SZ`($ctx)
	add	$A,$A,r16
	add	$B,$B,r17
	$PUSH	$inp,`$FRAME-$SIZE_T*23`($sp)
	add	$C,$C,r18
	$ST	$A,`0*$SZ`($ctx)
	add	$D,$D,r19
	$ST	$B,`1*$SZ`($ctx)
	add	$E,$E,r20
	$ST	$C,`2*$SZ`($ctx)
	add	$F,$F,r21
	$ST	$D,`3*$SZ`($ctx)
	add	$G,$G,r22
	$ST	$E,`4*$SZ`($ctx)
	add	$H,$H,r23
	$ST	$F,`5*$SZ`($ctx)
	$ST	$G,`6*$SZ`($ctx)
	$UCMP	$inp,$num
	$ST	$H,`7*$SZ`($ctx)
	bne	Lsha2_block_private
	blr
	.long	0
	.byte	0,12,0x14,0,0,0,0,0
.size	$func,.-$func
___
} else {
########################################################################
# SHA512 for PPC32, X vector is off-loaded to stack...
#
#			|	sha512
#			|	-m32
# ----------------------+-----------------------
# PPC74x0,gcc-4.0.1	|	+48%
# POWER6,gcc-4.4.6	|	+124%(*)
# POWER7,gcc-4.4.6	|	+79%(*)
# e300,gcc-4.1.0	|	+167%
#
# (*)	~1/3 of -m64 result [and ~20% better than -m32 code generated
#	by xlc-12.1]

my $XOFF=$LOCALS;

my @V=map("r$_",(16..31));	# A..H

my ($s0,$s1,$t0,$t1,$t2,$t3,$a0,$a1,$a2,$a3)=map("r$_",(0,5,6,8..12,14,15));
my ($x0,$x1)=("r3","r4");	# zaps $ctx and $inp

sub ROUND_00_15_ppc32 {
my ($i,	$ahi,$alo,$bhi,$blo,$chi,$clo,$dhi,$dlo,
	$ehi,$elo,$fhi,$flo,$ghi,$glo,$hhi,$hlo)=@_;

$code.=<<___;
	lwz	$t2,`$SZ*($i%16)+($LITTLE_ENDIAN^4)`($Tbl)
	 xor	$a0,$flo,$glo
	lwz	$t3,`$SZ*($i%16)+($LITTLE_ENDIAN^0)`($Tbl)
	 xor	$a1,$fhi,$ghi
	addc	$hlo,$hlo,$t0			; h+=x[i]
	stw	$t0,`$XOFF+0+$SZ*($i%16)`($sp)	; save x[i]

	srwi	$s0,$elo,$Sigma1[0]
	srwi	$s1,$ehi,$Sigma1[0]
	 and	$a0,$a0,$elo
	adde	$hhi,$hhi,$t1
	 and	$a1,$a1,$ehi
	stw	$t1,`$XOFF+4+$SZ*($i%16)`($sp)
	srwi	$t0,$elo,$Sigma1[1]
	srwi	$t1,$ehi,$Sigma1[1]
	 addc	$hlo,$hlo,$t2			; h+=K512[i]
	insrwi	$s0,$ehi,$Sigma1[0],0
	insrwi	$s1,$elo,$Sigma1[0],0
	 xor	$a0,$a0,$glo			; Ch(e,f,g)
	 adde	$hhi,$hhi,$t3
	 xor	$a1,$a1,$ghi
	insrwi	$t0,$ehi,$Sigma1[1],0
	insrwi	$t1,$elo,$Sigma1[1],0
	 addc	$hlo,$hlo,$a0			; h+=Ch(e,f,g)
	srwi	$t2,$ehi,$Sigma1[2]-32
	srwi	$t3,$elo,$Sigma1[2]-32
	xor	$s0,$s0,$t0
	xor	$s1,$s1,$t1
	insrwi	$t2,$elo,$Sigma1[2]-32,0
	insrwi	$t3,$ehi,$Sigma1[2]-32,0
	 xor	$a0,$alo,$blo			; a^b, b^c in next round
	 adde	$hhi,$hhi,$a1
	 xor	$a1,$ahi,$bhi
	xor	$s0,$s0,$t2			; Sigma1(e)
	xor	$s1,$s1,$t3

	srwi	$t0,$alo,$Sigma0[0]
	 and	$a2,$a2,$a0
	 addc	$hlo,$hlo,$s0			; h+=Sigma1(e)
	 and	$a3,$a3,$a1
	srwi	$t1,$ahi,$Sigma0[0]
	srwi	$s0,$ahi,$Sigma0[1]-32
	 adde	$hhi,$hhi,$s1
	srwi	$s1,$alo,$Sigma0[1]-32
	insrwi	$t0,$ahi,$Sigma0[0],0
	insrwi	$t1,$alo,$Sigma0[0],0
	 xor	$a2,$a2,$blo			; Maj(a,b,c)
	 addc	$dlo,$dlo,$hlo			; d+=h
	 xor	$a3,$a3,$bhi
	insrwi	$s0,$alo,$Sigma0[1]-32,0
	insrwi	$s1,$ahi,$Sigma0[1]-32,0
	 adde	$dhi,$dhi,$hhi
	srwi	$t2,$ahi,$Sigma0[2]-32
	srwi	$t3,$alo,$Sigma0[2]-32
	xor	$s0,$s0,$t0
	 addc	$hlo,$hlo,$a2			; h+=Maj(a,b,c)
	xor	$s1,$s1,$t1
	insrwi	$t2,$alo,$Sigma0[2]-32,0
	insrwi	$t3,$ahi,$Sigma0[2]-32,0
	 adde	$hhi,$hhi,$a3
___
$code.=<<___ if ($i>=15);
	lwz	$t0,`$XOFF+0+$SZ*(($i+2)%16)`($sp)
	lwz	$t1,`$XOFF+4+$SZ*(($i+2)%16)`($sp)
___
$code.=<<___ if ($i<15 && !$LITTLE_ENDIAN);
	lwz	$t1,`$SZ*($i+1)+0`($inp)
	lwz	$t0,`$SZ*($i+1)+4`($inp)
___
$code.=<<___ if ($i<15 && $LITTLE_ENDIAN);
	lwz	$a2,`$SZ*($i+1)+0`($inp)
	 lwz	$a3,`$SZ*($i+1)+4`($inp)
	rotlwi	$t1,$a2,8
	 rotlwi	$t0,$a3,8
	rlwimi	$t1,$a2,24,0,7
	 rlwimi	$t0,$a3,24,0,7
	rlwimi	$t1,$a2,24,16,23
	 rlwimi	$t0,$a3,24,16,23
___
$code.=<<___;
	xor	$s0,$s0,$t2			; Sigma0(a)
	xor	$s1,$s1,$t3
	addc	$hlo,$hlo,$s0			; h+=Sigma0(a)
	adde	$hhi,$hhi,$s1
___
$code.=<<___ if ($i==15);
	lwz	$x0,`$XOFF+0+$SZ*(($i+1)%16)`($sp)
	lwz	$x1,`$XOFF+4+$SZ*(($i+1)%16)`($sp)
___
}
sub ROUND_16_xx_ppc32 {
my ($i,	$ahi,$alo,$bhi,$blo,$chi,$clo,$dhi,$dlo,
	$ehi,$elo,$fhi,$flo,$ghi,$glo,$hhi,$hlo)=@_;

$code.=<<___;
	srwi	$s0,$t0,$sigma0[0]
	srwi	$s1,$t1,$sigma0[0]
	srwi	$t2,$t0,$sigma0[1]
	srwi	$t3,$t1,$sigma0[1]
	insrwi	$s0,$t1,$sigma0[0],0
	insrwi	$s1,$t0,$sigma0[0],0
	srwi	$a0,$t0,$sigma0[2]
	insrwi	$t2,$t1,$sigma0[1],0
	insrwi	$t3,$t0,$sigma0[1],0
	insrwi	$a0,$t1,$sigma0[2],0
	xor	$s0,$s0,$t2
	 lwz	$t2,`$XOFF+0+$SZ*(($i+14)%16)`($sp)
	srwi	$a1,$t1,$sigma0[2]
	xor	$s1,$s1,$t3
	 lwz	$t3,`$XOFF+4+$SZ*(($i+14)%16)`($sp)
	xor	$a0,$a0,$s0
	 srwi	$s0,$t2,$sigma1[0]
	xor	$a1,$a1,$s1
	 srwi	$s1,$t3,$sigma1[0]
	addc	$x0,$x0,$a0			; x[i]+=sigma0(x[i+1])
	 srwi	$a0,$t3,$sigma1[1]-32
	insrwi	$s0,$t3,$sigma1[0],0
	insrwi	$s1,$t2,$sigma1[0],0
	adde	$x1,$x1,$a1
	 srwi	$a1,$t2,$sigma1[1]-32

	insrwi	$a0,$t2,$sigma1[1]-32,0
	srwi	$t2,$t2,$sigma1[2]
	insrwi	$a1,$t3,$sigma1[1]-32,0
	insrwi	$t2,$t3,$sigma1[2],0
	xor	$s0,$s0,$a0
	 lwz	$a0,`$XOFF+0+$SZ*(($i+9)%16)`($sp)
	srwi	$t3,$t3,$sigma1[2]
	xor	$s1,$s1,$a1
	 lwz	$a1,`$XOFF+4+$SZ*(($i+9)%16)`($sp)
	xor	$s0,$s0,$t2
	 addc	$x0,$x0,$a0			; x[i]+=x[i+9]
	xor	$s1,$s1,$t3
	 adde	$x1,$x1,$a1
	addc	$x0,$x0,$s0			; x[i]+=sigma1(x[i+14])
	adde	$x1,$x1,$s1
___
	($t0,$t1,$x0,$x1) = ($x0,$x1,$t0,$t1);
	&ROUND_00_15_ppc32(@_);
}

$code.=<<___;
.align	4
Lsha2_block_private:
___
$code.=<<___ if (!$LITTLE_ENDIAN);
	lwz	$t1,0($inp)
	xor	$a2,@V[3],@V[5]		; B^C, magic seed
	lwz	$t0,4($inp)
	xor	$a3,@V[2],@V[4]
___
$code.=<<___ if ($LITTLE_ENDIAN);
	lwz	$a1,0($inp)
	xor	$a2,@V[3],@V[5]		; B^C, magic seed
	lwz	$a0,4($inp)
	xor	$a3,@V[2],@V[4]
	rotlwi	$t1,$a1,8
	 rotlwi	$t0,$a0,8
	rlwimi	$t1,$a1,24,0,7
	 rlwimi	$t0,$a0,24,0,7
	rlwimi	$t1,$a1,24,16,23
	 rlwimi	$t0,$a0,24,16,23
___
for($i=0;$i<16;$i++) {
	&ROUND_00_15_ppc32($i,@V);
	unshift(@V,pop(@V));	unshift(@V,pop(@V));
	($a0,$a1,$a2,$a3) = ($a2,$a3,$a0,$a1);
}
$code.=<<___;
	li	$a0,`$rounds/16-1`
	mtctr	$a0
.align	4
Lrounds:
	addi	$Tbl,$Tbl,`16*$SZ`
___
for(;$i<32;$i++) {
	&ROUND_16_xx_ppc32($i,@V);
	unshift(@V,pop(@V));	unshift(@V,pop(@V));
	($a0,$a1,$a2,$a3) = ($a2,$a3,$a0,$a1);
}
$code.=<<___;
	bdnz-	Lrounds

	$POP	$ctx,`$FRAME-$SIZE_T*22`($sp)
	$POP	$inp,`$FRAME-$SIZE_T*23`($sp)	; inp pointer
	$POP	$num,`$FRAME-$SIZE_T*24`($sp)	; end pointer
	subi	$Tbl,$Tbl,`($rounds-16)*$SZ`	; rewind Tbl

	lwz	$t0,`$LITTLE_ENDIAN^0`($ctx)
	lwz	$t1,`$LITTLE_ENDIAN^4`($ctx)
	lwz	$t2,`$LITTLE_ENDIAN^8`($ctx)
	lwz	$t3,`$LITTLE_ENDIAN^12`($ctx)
	lwz	$a0,`$LITTLE_ENDIAN^16`($ctx)
	lwz	$a1,`$LITTLE_ENDIAN^20`($ctx)
	lwz	$a2,`$LITTLE_ENDIAN^24`($ctx)
	addc	@V[1],@V[1],$t1
	lwz	$a3,`$LITTLE_ENDIAN^28`($ctx)
	adde	@V[0],@V[0],$t0
	lwz	$t0,`$LITTLE_ENDIAN^32`($ctx)
	addc	@V[3],@V[3],$t3
	lwz	$t1,`$LITTLE_ENDIAN^36`($ctx)
	adde	@V[2],@V[2],$t2
	lwz	$t2,`$LITTLE_ENDIAN^40`($ctx)
	addc	@V[5],@V[5],$a1
	lwz	$t3,`$LITTLE_ENDIAN^44`($ctx)
	adde	@V[4],@V[4],$a0
	lwz	$a0,`$LITTLE_ENDIAN^48`($ctx)
	addc	@V[7],@V[7],$a3
	lwz	$a1,`$LITTLE_ENDIAN^52`($ctx)
	adde	@V[6],@V[6],$a2
	lwz	$a2,`$LITTLE_ENDIAN^56`($ctx)
	addc	@V[9],@V[9],$t1
	lwz	$a3,`$LITTLE_ENDIAN^60`($ctx)
	adde	@V[8],@V[8],$t0
	stw	@V[0],`$LITTLE_ENDIAN^0`($ctx)
	stw	@V[1],`$LITTLE_ENDIAN^4`($ctx)
	addc	@V[11],@V[11],$t3
	stw	@V[2],`$LITTLE_ENDIAN^8`($ctx)
	stw	@V[3],`$LITTLE_ENDIAN^12`($ctx)
	adde	@V[10],@V[10],$t2
	stw	@V[4],`$LITTLE_ENDIAN^16`($ctx)
	stw	@V[5],`$LITTLE_ENDIAN^20`($ctx)
	addc	@V[13],@V[13],$a1
	stw	@V[6],`$LITTLE_ENDIAN^24`($ctx)
	stw	@V[7],`$LITTLE_ENDIAN^28`($ctx)
	adde	@V[12],@V[12],$a0
	stw	@V[8],`$LITTLE_ENDIAN^32`($ctx)
	stw	@V[9],`$LITTLE_ENDIAN^36`($ctx)
	addc	@V[15],@V[15],$a3
	stw	@V[10],`$LITTLE_ENDIAN^40`($ctx)
	stw	@V[11],`$LITTLE_ENDIAN^44`($ctx)
	adde	@V[14],@V[14],$a2
	stw	@V[12],`$LITTLE_ENDIAN^48`($ctx)
	stw	@V[13],`$LITTLE_ENDIAN^52`($ctx)
	stw	@V[14],`$LITTLE_ENDIAN^56`($ctx)
	stw	@V[15],`$LITTLE_ENDIAN^60`($ctx)

	addi	$inp,$inp,`16*$SZ`		; advance inp
	$PUSH	$inp,`$FRAME-$SIZE_T*23`($sp)
	$UCMP	$inp,$num
	bne	Lsha2_block_private
	blr
	.long	0
	.byte	0,12,0x14,0,0,0,0,0
.size	$func,.-$func
___
}

# Ugly hack here, because PPC assembler syntax seem to vary too
# much from platforms to platform...
$code.=<<___;
.align	6
LPICmeup:
	mflr	r0
	bcl	20,31,\$+4
	mflr	$Tbl	; vvvvvv "distance" between . and 1st data entry
	addi	$Tbl,$Tbl,`64-8`
	mtlr	r0
	blr
	.long	0
	.byte	0,12,0x14,0,0,0,0,0
	.space	`64-9*4`
___
$code.=<<___ if ($SZ==8);
	.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
___
$code.=<<___ if ($SZ==4);
	.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
___

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