summaryrefslogtreecommitdiff
path: root/Build/source/libs/gmp/gmp-6.0.0/mpn/ia64/lorrshift.asm
blob: 694aaf0f400f5877ef748988abf91cba9f3920f2 (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
dnl  IA-64 mpn_lshift/mpn_rshift.

dnl  Contributed to the GNU project by Torbjorn Granlund.

dnl  Copyright 2000-2005 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:      2
C Itanium 2:    1

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')

ifdef(`OPERATION_lshift',`
	define(`FSH',`shl')
	define(`BSH',`shr.u')
	define(`UPD',`-8')
	define(`POFF',`-512')
	define(`PUPD',`-32')
	define(`func',`mpn_lshift')
')
ifdef(`OPERATION_rshift',`
	define(`FSH',`shr.u')
	define(`BSH',`shl')
	define(`UPD',`8')
	define(`POFF',`512')
	define(`PUPD',`32')
	define(`func',`mpn_rshift')
')

MULFUNC_PROLOGUE(mpn_lshift mpn_rshift)

ASM_START()
PROLOGUE(func)
	.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;	cmp.lt	p14, p15 = 4, n		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
	add	r16 = -5, n
	;;
}{.mmi;	cmp.eq	p6, p0 = 1, r14		C		M I
	cmp.eq	p7, p0 = 2, r14		C		M I
	shr.u	n = r16, 2		C		I0
}{.mmi;	cmp.eq	p8, p0 = 3, r14		C		M I
ifdef(`OPERATION_lshift',
`	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		C function return value
	;;
	FSH	r24 = r10, cnt
	BSH	r25 = r19, tnc
  (p14)	br.cond.dptk	.grt4
	;;
	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	;;
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	;;
	or	r14 = r25, r24
	FSH	r22 = r17, cnt
	BSH	r23 = r10, tnc
	br	.Lr4

.grt4:	ld8	r18 = [up], UPD
	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	;;
	ld8	r19 = [up], UPD
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	;;
	ld8	r16 = [up], UPD
	FSH	r22 = r17, cnt
	BSH	r23 = r18, tnc
	;;
	or	r14 = r25, r24
	ld8	r17 = [up], UPD
	br.cloop.dpnt	.Ltop
	br	.Lbot

.Lb01:
  (p15)	BSH	r8 = r10, tnc		C function return value	I
  (p15)	FSH	r22 = r10, cnt		C		I
  (p15)	br.cond.dptk	.Lr1		C return	B

.grt1:	ld8	r18 = [up], UPD
	;;
	ld8	r19 = [up], UPD
	BSH	r8 = r10, tnc		C function return value
	;;
	ld8	r16 = [up], UPD
	FSH	r22 = r10, cnt
	BSH	r23 = r18, tnc
	;;
	ld8	r17 = [up], UPD
	FSH	r24 = r18, cnt
	BSH	r25 = r19, tnc
	br.cloop.dpnt	.grt5
	;;
	or	r15 = r23, r22
	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	;;
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	br	.Lr5

.grt5:	ld8	r18 = [up], UPD
	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	;;
	ld8	r19 = [up], UPD
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	;;
	or	r15 = r23, r22
	ld8	r16 = [up], UPD
	br	.LL01


.Lb10:	ld8	r17 = [up], UPD
  (p14)	br.cond.dptk	.grt2

	BSH	r8 = r10, tnc		C function return value
	;;
	FSH	r20 = r10, cnt
	BSH	r21 = r17, tnc
	;;
	or	r14 = r21, r20
	FSH	r22 = r17, cnt
	br	.Lr2			C return

.grt2:	ld8	r18 = [up], UPD
	BSH	r8 = r10, tnc		C function return value
	;;
	ld8	r19 = [up], UPD
	FSH	r20 = r10, cnt
	BSH	r21 = r17, tnc
	;;
	ld8	r16 = [up], UPD
	FSH	r22 = r17, cnt
	BSH	r23 = r18, tnc
	;;
 {.mmi;	ld8	r17 = [up], UPD
	or	r14 = r21, r20
	FSH	r24 = r18, cnt
}{.mib;	nop	0
	BSH	r25 = r19, tnc
	br.cloop.dpnt	.grt6
	;; }

	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	br	.Lr6

.grt6:	ld8	r18 = [up], UPD
	FSH	r26 = r19, cnt
	BSH	r27 = r16, tnc
	;;
	ld8	r19 = [up], UPD
	br	.LL10


.Lb11:	ld8	r16 = [up], UPD
	;;
	ld8	r17 = [up], UPD
	BSH	r8 = r10, tnc		C function return value
  (p14)	br.cond.dptk	.grt3
	;;

	FSH	r26 = r10, cnt
	BSH	r27 = r16, tnc
	;;
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	;;
	or	r15 = r27, r26
	FSH	r22 = r17, cnt
	br	.Lr3			C return

.grt3:	ld8	r18 = [up], UPD
	FSH	r26 = r10, cnt
	BSH	r27 = r16, tnc
	;;
	ld8	r19 = [up], UPD
	FSH	r20 = r16, cnt
	BSH	r21 = r17, tnc
	;;
	ld8	r16 = [up], UPD
	FSH	r22 = r17, cnt
	BSH	r23 = r18, tnc
	;;
	ld8	r17 = [up], UPD
	br.cloop.dpnt	.grt7

	or	r15 = r27, r26
	FSH	r24 = r18, cnt
	BSH	r25 = r19, tnc
	br	.Lr7

.grt7:	or	r15 = r27, r26
	FSH	r24 = r18, cnt
	BSH	r25 = r19, tnc
	ld8	r18 = [up], UPD
	br	.LL11

C *** MAIN LOOP START ***
	ALIGN(32)
.Ltop:
 {.mmi;	st8	[rp] = r14, UPD		C M2
	or	r15 = r27, r26		C M3
	FSH	r24 = r18, cnt		C I0
}{.mmi;	ld8	r18 = [up], UPD		C M1
	lfetch	[r11], PUPD
	BSH	r25 = r19, tnc		C I1
	;; }
.LL11:
 {.mmi;	st8	[rp] = r15, UPD
	or	r14 = r21, r20
	FSH	r26 = r19, cnt
}{.mmi;	ld8	r19 = [up], UPD
	nop.m	0
	BSH	r27 = r16, tnc
	;; }
.LL10:
 {.mmi;	st8	[rp] = r14, UPD
	or	r15 = r23, r22
	FSH	r20 = r16, cnt
}{.mmi;	ld8	r16 = [up], UPD
	nop.m	0
	BSH	r21 = r17, tnc
	;; }
.LL01:
 {.mmi;	st8	[rp] = r15, UPD
	or	r14 = r25, r24
	FSH	r22 = r17, cnt
}{.mib;	ld8	r17 = [up], UPD
	BSH	r23 = r18, tnc
	br.cloop.dptk	.Ltop
	;; }
C *** MAIN LOOP END ***

.Lbot:
 {.mmi;	st8	[rp] = r14, UPD
	or	r15 = r27, r26
	FSH	r24 = r18, cnt
}{.mib;	nop	0
	BSH	r25 = r19, tnc
	nop	0
	;; }
.Lr7:
 {.mmi;	st8	[rp] = r15, UPD
	or	r14 = r21, r20
	FSH	r26 = r19, cnt
}{.mib;	nop	0
	BSH	r27 = r16, tnc
	nop	0
	;; }
.Lr6:
 {.mmi;	st8	[rp] = r14, UPD
	or	r15 = r23, r22
	FSH	r20 = r16, cnt
}{.mib;	nop	0
	BSH	r21 = r17, tnc
	nop	0
	;; }
.Lr5:	st8	[rp] = r15, UPD
	or	r14 = r25, r24
	FSH	r22 = r17, cnt
	;;
.Lr4:	st8	[rp] = r14, UPD
	or	r15 = r27, r26
	;;
.Lr3:	st8	[rp] = r15, UPD
	or	r14 = r21, r20
	;;
.Lr2:	st8	[rp] = r14, UPD
	;;
.Lr1:	st8	[rp] = r22, UPD		C		M23
	mov	ar.lc = r2		C		I0
	br.ret.sptk.many b0		C		B
EPILOGUE(func)
ASM_END()