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
|
dnl IA-64 mpn_lshiftc.
dnl Contributed to the GNU project by Torbjorn Granlund.
dnl Copyright 2000-2005, 2010 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C Itanium: ?
C Itanium 2: 1.25
C This code is scheduled deeply since the plain shift instructions shr and shl
C have a latency of 4 (on Itanium) or 3 (on Itanium 2). Poor scheduling of
C these instructions cause a 10 cycle replay trap on Itanium.
C The ld8 scheduling should probably be decreased to make the function smaller.
C Good lfetch will make sure we never stall anyway.
C We should actually issue the first ld8 at cycle 0, and the first BSH/FSH pair
C at cycle 2. Judicious use of predicates could allow us to issue more ld8's
C in the prologue.
C INPUT PARAMETERS
define(`rp', `r32')
define(`up', `r33')
define(`n', `r34')
define(`cnt',`r35')
define(`tnc',`r9')
define(`FSH',`shl')
define(`BSH',`shr.u')
define(`UPD',`-8')
define(`POFF',`-512')
define(`PUPD',`-32')
define(`func',`mpn_lshiftc')
ASM_START()
PROLOGUE(mpn_lshiftc)
.prologue
.save ar.lc, r2
.body
ifdef(`HAVE_ABI_32',
` addp4 rp = 0, rp C M I
addp4 up = 0, up C M I
sxt4 n = n C M I
nop.m 0
nop.m 0
zxt4 cnt = cnt C I
;;
')
{.mmi; nop 0 C M I
and r14 = 3, n C M I
mov.i r2 = ar.lc C I0
}{.mmi; add r15 = -1, n C M I
sub tnc = 64, cnt C M I
nop 0
;;
}{.mmi; cmp.eq p6, p0 = 1, r14 C M I
cmp.eq p7, p0 = 2, r14 C M I
shr.u n = r15, 2 C I0
}{.mmi; cmp.eq p8, p0 = 3, r14 C M I
shladd up = r15, 3, up C M I
shladd rp = r15, 3, rp C M I
;;
}{.mmi; add r11 = POFF, up C M I
ld8 r10 = [up], UPD C M01
mov.i ar.lc = n C I0
}{.bbb;
(p6) br.dptk .Lb01
(p7) br.dptk .Lb10
(p8) br.dptk .Lb11
;; }
.Lb00:
ld8 r19 = [up], UPD
;;
ld8 r16 = [up], UPD
;;
ld8 r17 = [up], UPD
BSH r8 = r10, tnc
br.cloop.dptk L(gt4)
;;
FSH r24 = r10, cnt
BSH r25 = r19, tnc
;;
FSH r26 = r19, cnt
BSH r27 = r16, tnc
;;
FSH r20 = r16, cnt
BSH r21 = r17, tnc
;;
or r14 = r25, r24
FSH r22 = r17, cnt
;;
or r15 = r27, r26
sub r31 = -1, r14
br .Lr4
L(gt4):
{.mmi; nop 0
nop 0
FSH r24 = r10, cnt
}{.mmi; ld8 r18 = [up], UPD
nop 0
BSH r25 = r19, tnc
;; }
{.mmi; nop 0
nop 0
FSH r26 = r19, cnt
}{.mmi; ld8 r19 = [up], UPD
nop 0
BSH r27 = r16, tnc
;; }
{.mmi; nop 0
nop 0
FSH r20 = r16, cnt
}{.mmi; ld8 r16 = [up], UPD
nop 0
BSH r21 = r17, tnc
;; }
{.mmi; nop 0
or r14 = r25, r24
FSH r22 = r17, cnt
}{.mib; ld8 r17 = [up], UPD
BSH r23 = r18, tnc
br.cloop.dptk L(gt8)
;; }
{.mmi; nop 0
or r15 = r27, r26
FSH r24 = r18, cnt
}{.mib; sub r31 = -1, r14
BSH r25 = r19, tnc
br .Lr8 }
L(gt8):
or r15 = r27, r26
FSH r24 = r18, cnt
ld8 r18 = [up], UPD
sub r31 = -1, r14
BSH r25 = r19, tnc
br .LL00
.Lb01:
br.cloop.dptk L(gt1)
;;
BSH r8 = r10, tnc
FSH r22 = r10, cnt
;;
sub r31 = -1, r22
br .Lr1
;;
L(gt1):
ld8 r18 = [up], UPD
BSH r8 = r10, tnc
FSH r22 = r10, cnt
;;
ld8 r19 = [up], UPD
;;
ld8 r16 = [up], UPD
;;
ld8 r17 = [up], UPD
BSH r23 = r18, tnc
br.cloop.dptk L(gt5)
;;
nop 0
FSH r24 = r18, cnt
BSH r25 = r19, tnc
;;
nop 0
FSH r26 = r19, cnt
BSH r27 = r16, tnc
;;
or r15 = r23, r22
FSH r20 = r16, cnt
BSH r21 = r17, tnc
;;
or r14 = r25, r24
FSH r22 = r17, cnt
sub r31 = -1, r15
br .Lr5
L(gt5):
{.mmi; nop 0
nop 0
FSH r24 = r18, cnt
}{.mmi; ld8 r18 = [up], UPD
nop 0
BSH r25 = r19, tnc
;; }
{.mmi; nop 0
nop 0
FSH r26 = r19, cnt
}{.mmi; ld8 r19 = [up], UPD
nop 0
BSH r27 = r16, tnc
;; }
{.mmi; nop 0
or r15 = r23, r22
FSH r20 = r16, cnt
}{.mmi; ld8 r16 = [up], UPD
nop 0
BSH r21 = r17, tnc
;; }
{.mmi; or r14 = r25, r24
sub r31 = -1, r15
FSH r22 = r17, cnt
}{.mib; ld8 r17 = [up], UPD
BSH r23 = r18, tnc
br L(end)
;; }
.Lb10:
ld8 r17 = [up], UPD
br.cloop.dptk L(gt2)
;;
BSH r8 = r10, tnc
FSH r20 = r10, cnt
;;
BSH r21 = r17, tnc
FSH r22 = r17, cnt
;;
or r14 = r21, r20
;;
sub r31 = -1, r14
br .Lr2
;;
L(gt2):
ld8 r18 = [up], UPD
BSH r8 = r10, tnc
FSH r20 = r10, cnt
;;
ld8 r19 = [up], UPD
;;
ld8 r16 = [up], UPD
BSH r21 = r17, tnc
FSH r22 = r17, cnt
;;
ld8 r17 = [up], UPD
BSH r23 = r18, tnc
br.cloop.dptk L(gt6)
;;
nop 0
FSH r24 = r18, cnt
BSH r25 = r19, tnc
;;
or r14 = r21, r20
FSH r26 = r19, cnt
BSH r27 = r16, tnc
;;
{.mmi; nop 0
or r15 = r23, r22
FSH r20 = r16, cnt
}{.mib; sub r31 = -1, r14
BSH r21 = r17, tnc
br .Lr6
;; }
L(gt6):
{.mmi; nop 0
nop 0
FSH r24 = r18, cnt
}{.mmi; ld8 r18 = [up], UPD
nop 0
BSH r25 = r19, tnc
;; }
{.mmi; nop 0
or r14 = r21, r20
FSH r26 = r19, cnt
}{.mmi; ld8 r19 = [up], UPD
nop 0
BSH r27 = r16, tnc
;; }
{.mmi; or r15 = r23, r22
sub r31 = -1, r14
FSH r20 = r16, cnt
}{.mib; ld8 r16 = [up], UPD
BSH r21 = r17, tnc
br .LL10
}
.Lb11:
ld8 r16 = [up], UPD
;;
ld8 r17 = [up], UPD
BSH r8 = r10, tnc
FSH r26 = r10, cnt
br.cloop.dptk L(gt3)
;;
BSH r27 = r16, tnc
;;
FSH r20 = r16, cnt
BSH r21 = r17, tnc
;;
FSH r22 = r17, cnt
;;
or r15 = r27, r26
;;
or r14 = r21, r20
sub r31 = -1, r15
br .Lr3
;;
L(gt3):
ld8 r18 = [up], UPD
;;
ld8 r19 = [up], UPD
BSH r27 = r16, tnc
;;
{.mmi; nop 0
nop 0
FSH r20 = r16, cnt
}{.mmi; ld8 r16 = [up], UPD
nop 0
BSH r21 = r17, tnc
;;
}{.mmi; nop 0
nop 0
FSH r22 = r17, cnt
}{.mib; ld8 r17 = [up], UPD
BSH r23 = r18, tnc
br.cloop.dptk L(gt7)
;; }
or r15 = r27, r26
FSH r24 = r18, cnt
BSH r25 = r19, tnc
;;
{.mmi; nop 0
or r14 = r21, r20
FSH r26 = r19, cnt
}{.mib; sub r31 = -1, r15
BSH r27 = r16, tnc
br .Lr7
}
L(gt7):
{.mmi; nop 0
or r15 = r27, r26
FSH r24 = r18, cnt
}{.mmi; ld8 r18 = [up], UPD
nop 0
BSH r25 = r19, tnc
;; }
{.mmi; or r14 = r21, r20
sub r31 = -1, r15
FSH r26 = r19, cnt
}{.mib; ld8 r19 = [up], UPD
BSH r27 = r16, tnc
br .LL11
}
C *** MAIN LOOP START ***
ALIGN(32)
L(top):
.LL01:
{.mmi; st8 [rp] = r31, UPD C M2
or r15 = r27, r26 C M3
FSH r24 = r18, cnt C I0
}{.mmi; ld8 r18 = [up], UPD C M0
sub r31 = -1, r14 C M1
BSH r25 = r19, tnc C I1
;; }
.LL00:
{.mmi; st8 [rp] = r31, UPD
or r14 = r21, r20
FSH r26 = r19, cnt
}{.mmi; ld8 r19 = [up], UPD
sub r31 = -1, r15
BSH r27 = r16, tnc
;; }
.LL11:
{.mmi; st8 [rp] = r31, UPD
or r15 = r23, r22
FSH r20 = r16, cnt
}{.mmi; ld8 r16 = [up], UPD
sub r31 = -1, r14
BSH r21 = r17, tnc
;; }
.LL10:
{.mmi; st8 [rp] = r31, UPD
or r14 = r25, r24
FSH r22 = r17, cnt
}{.mmi; ld8 r17 = [up], UPD
sub r31 = -1, r15
BSH r23 = r18, tnc
;; }
L(end): lfetch [r11], PUPD
br.cloop.dptk L(top)
C *** MAIN LOOP END ***
{.mmi; st8 [rp] = r31, UPD
or r15 = r27, r26
FSH r24 = r18, cnt
}{.mib; sub r31 = -1, r14
BSH r25 = r19, tnc
nop 0
;; }
.Lr8:
{.mmi; st8 [rp] = r31, UPD
or r14 = r21, r20
FSH r26 = r19, cnt
}{.mib; sub r31 = -1, r15
BSH r27 = r16, tnc
nop 0
;; }
.Lr7:
{.mmi; st8 [rp] = r31, UPD
or r15 = r23, r22
FSH r20 = r16, cnt
}{.mib; sub r31 = -1, r14
BSH r21 = r17, tnc
nop 0
;; }
.Lr6: st8 [rp] = r31, UPD
or r14 = r25, r24
FSH r22 = r17, cnt
sub r31 = -1, r15
;;
.Lr5: st8 [rp] = r31, UPD
or r15 = r27, r26
sub r31 = -1, r14
;;
.Lr4: st8 [rp] = r31, UPD
or r14 = r21, r20
sub r31 = -1, r15
;;
.Lr3: st8 [rp] = r31, UPD
sub r31 = -1, r14
;;
.Lr2: st8 [rp] = r31, UPD
sub r31 = -1, r22
;;
.Lr1: st8 [rp] = r31, UPD C M23
mov ar.lc = r2 C I0
br.ret.sptk.many b0 C B
EPILOGUE(func)
ASM_END()
|
