aboutsummaryrefslogtreecommitdiff
path: root/vendor/gmp-6.3.0/mpn/x86_64/fastsse/copyi-palignr.asm
blob: 9876a473359ecf88cc2f5b591a4a2a5089e0558f (plain) (blame)
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
dnl  AMD64 mpn_copyi optimised for CPUs with fast SSE copying and SSSE3.

dnl  Copyright 2012, 2013, 2015 Free Software Foundation, Inc.

dnl  Contributed to the GNU project by Torbjörn Granlund.

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     cycles/limb     cycles/limb      good
C              aligned	      unaligned	      best seen	     for cpu?
C AMD K8,K9	 2.0		 illop		1.0/1.0		N
C AMD K10	 0.85		 illop				Y/N
C AMD bd1	 0.70		 0.66				Y
C AMD bd2	 0.68		 0.66				Y
C AMD bd3	 ?		 ?
C AMD bd4	 ?		 ?
C AMD bt1	 1.97		 8.16		1.5/1.5		N
C AMD bt2	 0.77		 0.93		0.65/opt	N/Y
C AMD zn1	 ?		 ?
C AMD zn2	 ?		 ?
C Intel P4	 2.26		 illop				Y/N
C Intel CNR	 0.52		 0.64		opt/opt		Y
C Intel NHM	 0.52		 0.71		0.50/0.67	N
C Intel SBR	 0.51		 0.54		opt/0.51	Y
C Intel IBR	 0.50		 0.54		opt/opt		Y
C Intel HWL	 0.50		 0.51		opt/opt		Y
C Intel BWL	 0.55		 0.55		opt/opt		Y
C Intel atom	 1.16		 1.61		opt/opt		Y
C Intel SLM	 1.02		 1.07		opt/opt		Y
C VIA nano	 1.09		 1.08		opt/opt		Y

C We use only 16-byte operations, except for unaligned top-most and bottom-most
C limbs.  We use the SSSE3 palignr instruction when rp - up = 8 (mod 16).  That
C instruction is better adapted to mpn_copyd's needs, we need to contort the
C code to use it here.
C
C For operands of < COPYI_SSE_THRESHOLD limbs, we use a plain 64-bit loop,
C taken from the x86_64 default code.

C INPUT PARAMETERS
define(`rp', `%rdi')
define(`up', `%rsi')
define(`n',  `%rdx')

C There are three instructions for loading an aligned 128-bit quantity.  We use
C movaps, since it has the shortest coding.
dnl define(`movdqa', ``movaps'')

ifdef(`COPYI_SSE_THRESHOLD',`',`define(`COPYI_SSE_THRESHOLD', 7)')

ASM_START()
	TEXT
	ALIGN(64)
PROLOGUE(mpn_copyi)
	FUNC_ENTRY(3)

	cmp	$COPYI_SSE_THRESHOLD, n
	jbe	L(bc)

	test	$8, R8(rp)		C is rp 16-byte aligned?
	jz	L(rp_aligned)		C jump if rp aligned

	movsq				C copy one limb
	dec	n

L(rp_aligned):
	test	$8, R8(up)
	jnz	L(uent)

ifelse(eval(COPYI_SSE_THRESHOLD >= 8),1,
`	sub	$8, n',
`	jmp	L(am)')

	ALIGN(16)
L(atop):movdqa	0(up), %xmm0
	movdqa	16(up), %xmm1
	movdqa	32(up), %xmm2
	movdqa	48(up), %xmm3
	lea	64(up), up
	movdqa	%xmm0, (rp)
	movdqa	%xmm1, 16(rp)
	movdqa	%xmm2, 32(rp)
	movdqa	%xmm3, 48(rp)
	lea	64(rp), rp
L(am):	sub	$8, n
	jnc	L(atop)

	test	$4, R8(n)
	jz	1f
	movdqa	(up), %xmm0
	movdqa	16(up), %xmm1
	lea	32(up), up
	movdqa	%xmm0, (rp)
	movdqa	%xmm1, 16(rp)
	lea	32(rp), rp

1:	test	$2, R8(n)
	jz	1f
	movdqa	(up), %xmm0
	lea	16(up), up
	movdqa	%xmm0, (rp)
	lea	16(rp), rp

1:	test	$1, R8(n)
	jz	1f
	mov	(up), %r8
	mov	%r8, (rp)

1:	FUNC_EXIT()
	ret

L(uent):
C Code handling up - rp = 8 (mod 16)

	cmp	$16, n
	jc	L(ued0)

IFDOS(`	add	$-56, %rsp	')
IFDOS(`	movdqa	%xmm6, (%rsp)	')
IFDOS(`	movdqa	%xmm7, 16(%rsp)	')
IFDOS(`	movdqa	%xmm8, 32(%rsp)	')

	movaps	120(up), %xmm7
	movaps	104(up), %xmm6
	movaps	88(up), %xmm5
	movaps	72(up), %xmm4
	movaps	56(up), %xmm3
	movaps	40(up), %xmm2
	lea	128(up), up
	sub	$32, n
	jc	L(ued1)

	ALIGN(16)
L(utop):movaps	-104(up), %xmm1
	sub	$16, n
	movaps	-120(up), %xmm0
	palignr($8, %xmm6, %xmm7)
	movaps	-136(up), %xmm8
	movdqa	%xmm7, 112(rp)
	palignr($8, %xmm5, %xmm6)
	movaps	120(up), %xmm7
	movdqa	%xmm6, 96(rp)
	palignr($8, %xmm4, %xmm5)
	movaps	104(up), %xmm6
	movdqa	%xmm5, 80(rp)
	palignr($8, %xmm3, %xmm4)
	movaps	88(up), %xmm5
	movdqa	%xmm4, 64(rp)
	palignr($8, %xmm2, %xmm3)
	movaps	72(up), %xmm4
	movdqa	%xmm3, 48(rp)
	palignr($8, %xmm1, %xmm2)
	movaps	56(up), %xmm3
	movdqa	%xmm2, 32(rp)
	palignr($8, %xmm0, %xmm1)
	movaps	40(up), %xmm2
	movdqa	%xmm1, 16(rp)
	palignr($8, %xmm8, %xmm0)
	lea	128(up), up
	movdqa	%xmm0, (rp)
	lea	128(rp), rp
	jnc	L(utop)

L(ued1):movaps	-104(up), %xmm1
	movaps	-120(up), %xmm0
	movaps	-136(up), %xmm8
	palignr($8, %xmm6, %xmm7)
	movdqa	%xmm7, 112(rp)
	palignr($8, %xmm5, %xmm6)
	movdqa	%xmm6, 96(rp)
	palignr($8, %xmm4, %xmm5)
	movdqa	%xmm5, 80(rp)
	palignr($8, %xmm3, %xmm4)
	movdqa	%xmm4, 64(rp)
	palignr($8, %xmm2, %xmm3)
	movdqa	%xmm3, 48(rp)
	palignr($8, %xmm1, %xmm2)
	movdqa	%xmm2, 32(rp)
	palignr($8, %xmm0, %xmm1)
	movdqa	%xmm1, 16(rp)
	palignr($8, %xmm8, %xmm0)
	movdqa	%xmm0, (rp)
	lea	128(rp), rp

IFDOS(`	movdqa	(%rsp), %xmm6	')
IFDOS(`	movdqa	16(%rsp), %xmm7	')
IFDOS(`	movdqa	32(%rsp), %xmm8	')
IFDOS(`	add	$56, %rsp	')

L(ued0):test	$8, R8(n)
	jz	1f
	movaps	56(up), %xmm3
	movaps	40(up), %xmm2
	movaps	24(up), %xmm1
	movaps	8(up), %xmm0
	movaps	-8(up), %xmm4
	palignr($8, %xmm2, %xmm3)
	movdqa	%xmm3, 48(rp)
	palignr($8, %xmm1, %xmm2)
	movdqa	%xmm2, 32(rp)
	palignr($8, %xmm0, %xmm1)
	movdqa	%xmm1, 16(rp)
	palignr($8, %xmm4, %xmm0)
	lea	64(up), up
	movdqa	%xmm0, (rp)
	lea	64(rp), rp

1:	test	$4, R8(n)
	jz	1f
	movaps	24(up), %xmm1
	movaps	8(up), %xmm0
	palignr($8, %xmm0, %xmm1)
	movaps	-8(up), %xmm3
	movdqa	%xmm1, 16(rp)
	palignr($8, %xmm3, %xmm0)
	lea	32(up), up
	movdqa	%xmm0, (rp)
	lea	32(rp), rp

1:	test	$2, R8(n)
	jz	1f
	movdqa	8(up), %xmm0
	movdqa	-8(up), %xmm3
	palignr($8, %xmm3, %xmm0)
	lea	16(up), up
	movdqa	%xmm0, (rp)
	lea	16(rp), rp

1:	test	$1, R8(n)
	jz	1f
	mov	(up), %r8
	mov	%r8, (rp)

1:	FUNC_EXIT()
	ret

C Basecase code.  Needed for good small operands speed, not for
C correctness as the above code is currently written.

L(bc):	lea	-8(rp), rp
	sub	$4, R32(n)
	jc	L(end)

	ALIGN(16)
L(top):	mov	(up), %r8
	mov	8(up), %r9
	lea	32(rp), rp
	mov	16(up), %r10
	mov	24(up), %r11
	lea	32(up), up
	mov	%r8, -24(rp)
	mov	%r9, -16(rp)
ifelse(eval(COPYI_SSE_THRESHOLD >= 8),1,
`	sub	$4, R32(n)')
	mov	%r10, -8(rp)
	mov	%r11, (rp)
ifelse(eval(COPYI_SSE_THRESHOLD >= 8),1,
`	jnc	L(top)')

L(end):	test	$1, R8(n)
	jz	1f
	mov	(up), %r8
	mov	%r8, 8(rp)
	lea	8(rp), rp
	lea	8(up), up
1:	test	$2, R8(n)
	jz	1f
	mov	(up), %r8
	mov	8(up), %r9
	mov	%r8, 8(rp)
	mov	%r9, 16(rp)
1:	FUNC_EXIT()
	ret
EPILOGUE()