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
|
/* memcpy - copy a block from source to destination. 31/64 bit S/390 version.
Copyright (C) 2012-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include "asm-syntax.h"
#include <ifunc-memcpy.h>
/* INPUT PARAMETERS
%r2 = address of destination memory area
%r3 = address of source memory area
%r4 = number of bytes to copy. */
.text
#if defined __s390x__
# define LTGR ltgr
# define CGHI cghi
# define LGR lgr
# define AGHI aghi
# define BRCTG brctg
#else
# define LTGR ltr
# define CGHI chi
# define LGR lr
# define AGHI ahi
# define BRCTG brct
#endif /* ! defined __s390x__ */
#if HAVE_MEMCPY_Z900_G5
ENTRY(MEMPCPY_Z900_G5)
# if defined __s390x__
.machine "z900"
# else
.machine "g5"
# endif /* ! defined __s390x__ */
LGR %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z900_G5_start
END(MEMPCPY_Z900_G5)
ENTRY(MEMCPY_Z900_G5)
# if defined __s390x__
.machine "z900"
# else
.machine "g5"
# endif /* ! defined __s390x__ */
LGR %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z900_G5_start:
LTGR %r4,%r4
je .L_Z900_G5_4
AGHI %r4,-1
# if defined __s390x__
srlg %r5,%r4,8
# else
lr %r5,%r4
srl %r5,8
# endif /* ! defined __s390x__ */
LTGR %r5,%r5
jne .L_Z900_G5_13
.L_Z900_G5_3:
# if defined __s390x__
larl %r5,.L_Z900_G5_15
# define Z900_G5_EX_D 0
# else
basr %r5,0
.L_Z900_G5_14:
# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_14
# endif /* ! defined __s390x__ */
ex %r4,Z900_G5_EX_D(%r5)
.L_Z900_G5_4:
br %r14
.L_Z900_G5_13:
CGHI %r5,4096 # Switch to mvcle for copies >1MB
jh __memcpy_mvcle
.L_Z900_G5_12:
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
la %r3,256(%r3)
BRCTG %r5,.L_Z900_G5_12
j .L_Z900_G5_3
.L_Z900_G5_15:
mvc 0(1,%r1),0(%r3)
END(MEMCPY_Z900_G5)
#endif /* HAVE_MEMCPY_Z900_G5 */
ENTRY(__memcpy_mvcle)
# Using as standalone function will result in unexpected
# results since the length field is incremented by 1 in order to
# compensate the changes already done in the functions above.
LGR %r0,%r2 # backup return dest [ + n ]
AGHI %r4,1 # length + 1
LGR %r5,%r4 # source length
LGR %r4,%r3 # source address
LGR %r2,%r1 # destination address
LGR %r3,%r5 # destination length = source length
.L_MVCLE_1:
mvcle %r2,%r4,0 # thats it, MVCLE is your friend
jo .L_MVCLE_1
LGR %r2,%r0 # return destination address
br %r14
END(__memcpy_mvcle)
#undef LTGR
#undef CGHI
#undef LGR
#undef AGHI
#undef BRCTG
#if HAVE_MEMCPY_Z10
ENTRY(MEMPCPY_Z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z10_start
END(MEMPCPY_Z10)
ENTRY(MEMCPY_Z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z10_start:
# if !defined __s390x__
llgfr %r4,%r4
# endif /* !defined __s390x__ */
cgije %r4,0,.L_Z10_4
aghi %r4,-1
srlg %r5,%r4,8
cgijlh %r5,0,.L_Z10_13
.L_Z10_3:
exrl %r4,.L_Z10_15
.L_Z10_4:
br %r14
.L_Z10_13:
cgfi %r5,65535 # Switch to mvcle for copies >16MB
jh __memcpy_mvcle
.L_Z10_12:
pfd 1,768(%r3)
pfd 2,768(%r1)
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
la %r3,256(%r3)
brctg %r5,.L_Z10_12
j .L_Z10_3
.L_Z10_15:
mvc 0(1,%r1),0(%r3)
END(MEMCPY_Z10)
#endif /* HAVE_MEMCPY_Z10 */
#if HAVE_MEMCPY_Z196
ENTRY(MEMPCPY_Z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z196_start
END(MEMPCPY_Z196)
ENTRY(MEMCPY_Z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z196_start:
# if !defined __s390x__
llgfr %r4,%r4
# endif /* !defined __s390x__ */
ltgr %r4,%r4
je .L_Z196_4
.L_Z196_start2:
aghi %r4,-1
srlg %r5,%r4,8
ltgr %r5,%r5
jne .L_Z196_5
.L_Z196_3:
exrl %r4,.L_Z196_14
.L_Z196_4:
br %r14
.L_Z196_5:
cgfi %r5,262144 # Switch to mvcle for copies >64MB
jh __memcpy_mvcle
.L_Z196_2:
pfd 1,768(%r3)
pfd 2,768(%r1)
mvc 0(256,%r1),0(%r3)
aghi %r5,-1
la %r1,256(%r1)
la %r3,256(%r3)
jne .L_Z196_2
j .L_Z196_3
.L_Z196_14:
mvc 0(1,%r1),0(%r3)
END(MEMCPY_Z196)
#endif /* HAVE_MEMCPY_Z196 */
#if HAVE_MEMMOVE_Z13
ENTRY(MEMMOVE_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
# if !defined __s390x__
/* Note: The 31bit dst and src pointers are prefixed with zeroes. */
llgfr %r4,%r4
llgfr %r3,%r3
llgfr %r2,%r2
# endif /* !defined __s390x__ */
sgrk %r0,%r2,%r3
clgijh %r4,16,.L_MEMMOVE_Z13_LARGE
aghik %r5,%r4,-1
.L_MEMMOVE_Z13_SMALL:
jl .L_MEMMOVE_Z13_END /* Jump away if len was zero. */
/* Store up to 16 bytes with vll/vstl which needs the index
instead of lengths. */
vll %v16,%r5,0(%r3)
vstl %v16,%r5,0(%r2)
.L_MEMMOVE_Z13_END:
br %r14
.L_MEMMOVE_Z13_LARGE:
lgr %r1,%r2 /* For memcpy: r1: Use as dest ;
r2: Return dest */
/* The unsigned comparison (dst - src >= len) determines if we can
execute the forward case with memcpy. */
#if ! HAVE_MEMCPY_Z196
# error The z13 variant of memmove needs the z196 variant of memcpy!
#endif
clgrjhe %r0,%r4,.L_Z196_start2
risbgn %r5,%r4,4,128+63,60 /* r5 = r4 / 16 */
aghi %r4,-16
clgijhe %r5,8,.L_MEMMOVE_Z13_LARGE_64B
.L_MEMMOVE_Z13_LARGE_16B_LOOP:
/* Store at least 16 bytes with vl/vst. The number of 16byte blocks
is stored in r5. */
vl %v16,0(%r4,%r3)
vst %v16,0(%r4,%r2)
aghi %r4,-16
brctg %r5,.L_MEMMOVE_Z13_LARGE_16B_LOOP
aghik %r5,%r4,15
j .L_MEMMOVE_Z13_SMALL
.L_MEMMOVE_Z13_LARGE_64B:
/* Store at least 128 bytes with 4x vl/vst. The number of 64byte blocks
will be stored in r0. */
aghi %r4,-48
srlg %r0,%r5,2 /* r5 = %r0 / 4
=> Number of 64byte blocks. */
.L_MEMMOVE_Z13_LARGE_64B_LOOP:
vl %v20,48(%r4,%r3)
vl %v19,32(%r4,%r3)
vl %v18,16(%r4,%r3)
vl %v17,0(%r4,%r3)
vst %v20,48(%r4,%r2)
vst %v19,32(%r4,%r2)
vst %v18,16(%r4,%r2)
vst %v17,0(%r4,%r2)
aghi %r4,-64
brctg %r0,.L_MEMMOVE_Z13_LARGE_64B_LOOP
aghi %r4,48
/* Recalculate the number of 16byte blocks. */
risbg %r5,%r5,62,128+63,0 /* r5 = r5 & 3
=> Remaining 16byte blocks. */
jne .L_MEMMOVE_Z13_LARGE_16B_LOOP
aghik %r5,%r4,15
j .L_MEMMOVE_Z13_SMALL
END(MEMMOVE_Z13)
#endif /* HAVE_MEMMOVE_Z13 */
#if HAVE_MEMMOVE_ARCH13
ENTRY(MEMMOVE_ARCH13)
.machine "arch13"
.machinemode "zarch_nohighgprs"
# if ! defined __s390x__
/* Note: The 31bit dst and src pointers are prefixed with zeroes. */
llgfr %r4,%r4
llgfr %r3,%r3
llgfr %r2,%r2
# endif /* ! defined __s390x__ */
sgrk %r5,%r2,%r3
aghik %r0,%r4,-1 /* Both vstl and mvcrl needs highest index. */
clgijh %r4,16,.L_MEMMOVE_ARCH13_LARGE
.L_MEMMOVE_ARCH13_SMALL:
jl .L_MEMMOVE_ARCH13_END /* Return if len was zero (cc of aghik). */
/* Store up to 16 bytes with vll/vstl (needs highest index). */
vll %v16,%r0,0(%r3)
vstl %v16,%r0,0(%r2)
.L_MEMMOVE_ARCH13_END:
br %r14
.L_MEMMOVE_ARCH13_LARGE:
lgr %r1,%r2 /* For memcpy: r1: Use as dest ; r2: Return dest */
/* The unsigned comparison (dst - src >= len) determines if we can
execute the forward case with memcpy. */
#if ! HAVE_MEMCPY_Z196
# error The arch13 variant of memmove needs the z196 variant of memcpy!
#endif
/* Backward case. */
clgrjhe %r5,%r4,.L_Z196_start2
clgijh %r0,255,.L_MEMMOVE_ARCH13_LARGER_256B
/* Move up to 256bytes with mvcrl (move right to left). */
mvcrl 0(%r1),0(%r3) /* Move (r0 + 1) bytes from r3 to r1. */
br %r14
.L_MEMMOVE_ARCH13_LARGER_256B:
/* First move the "remaining" block of up to 256 bytes at the end of
src/dst buffers. Then move blocks of 256bytes in a loop starting
with the block at the end.
(If src/dst pointers are aligned e.g. to 256 bytes, then the pointers
passed to mvcrl instructions are aligned, too) */
risbgn %r5,%r0,8,128+63,56 /* r5 = r0 / 256 */
risbgn %r0,%r0,56,128+63,0 /* r0 = r0 & 0xFF */
slgr %r4,%r0
lay %r1,-1(%r4,%r1)
lay %r3,-1(%r4,%r3)
mvcrl 0(%r1),0(%r3) /* Move (r0 + 1) bytes from r3 to r1. */
lghi %r0,255 /* Always copy 256 bytes in the loop below! */
.L_MEMMOVE_ARCH13_LARGE_256B_LOOP:
aghi %r1,-256
aghi %r3,-256
mvcrl 0(%r1),0(%r3) /* Move (r0 + 1) bytes from r3 to r1. */
brctg %r5,.L_MEMMOVE_ARCH13_LARGE_256B_LOOP
br %r14
END(MEMMOVE_ARCH13)
#endif /* HAVE_MEMMOVE_ARCH13 */
#if ! HAVE_MEMCPY_IFUNC
/* If we don't use ifunc, define an alias for mem[p]cpy here.
Otherwise see sysdeps/s390/mem[p]cpy.c. */
strong_alias (MEMCPY_DEFAULT, memcpy)
strong_alias (MEMPCPY_DEFAULT, __mempcpy)
weak_alias (__mempcpy, mempcpy)
#endif
#if ! HAVE_MEMMOVE_IFUNC
/* If we don't use ifunc, define an alias for memmove here.
Otherwise see sysdeps/s390/memmove.c. */
# if ! HAVE_MEMMOVE_C
/* If the c variant is needed, then sysdeps/s390/memmove-c.c
defines memmove.
Otherwise MEMMOVE_DEFAULT is implemented here and we have to define it. */
strong_alias (MEMMOVE_DEFAULT, memmove)
# endif
#endif
#if defined SHARED && IS_IN (libc)
/* Defines the internal symbols.
Compare to libc_hidden_[builtin_]def (mem[p]cpy) in string/mem[p]cpy.c. */
strong_alias (MEMCPY_DEFAULT, __GI_memcpy)
strong_alias (MEMPCPY_DEFAULT, __GI_mempcpy)
strong_alias (MEMPCPY_DEFAULT, __GI___mempcpy)
# if ! HAVE_MEMMOVE_C
/* If the c variant is needed, then sysdeps/s390/memmove-c.c
defines the internal symbol.
Otherwise MEMMOVE_DEFAULT is implemented here and we have to define it. */
strong_alias (MEMMOVE_DEFAULT, __GI_memmove)
# endif
#endif
|
