about summary refs log tree commit diff
path: root/sysdeps/s390/memcmp-z900.S
blob: bf07d494931cd665c08a07b656cd9aa084068378 (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
/* memcmp - compare two memory blocks.  31/64 bit S/390 version.
   Copyright (C) 2012-2023 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-memcmp.h>

/* INPUT PARAMETERS
     %r2 = address of first memory area
     %r3 = address of second memory area
     %r4 = number of bytes to compare.  */

       .text

#if HAVE_MEMCMP_Z900_G5
# if defined __s390x__
#  define LTGR	ltgr
#  define AGHI	aghi
#  define BRCTG	brctg
# else
#  define LTGR	ltr
#  define AGHI	ahi
#  define BRCTG	brct
# endif /* ! defined __s390x__  */
ENTRY(MEMCMP_Z900_G5)
# if defined __s390x__
	.machine "z900"
# else
	.machine "g5"
	basr    %r5,0
.L_Z900_G5_16:
#  define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_16
# endif /* ! defined __s390x__  */
	LTGR    %r4,%r4
	je      .L_Z900_G5_4
	AGHI    %r4,-1
# if defined __s390x__
	srlg    %r1,%r4,8
	larl    %r5,.L_Z900_G5_15
#  define Z900_G5_EX_D 0
# else
	lr	%r1,%r4
	srl	%r1,8
# endif /* ! defined __s390x__  */
	LTGR    %r1,%r1
	jne     .L_Z900_G5_12
.L_Z900_G5_3:
	ex      %r4,Z900_G5_EX_D(%r5)
.L_Z900_G5_4:
	ipm     %r2
# if defined __s390x__
	sllg    %r2,%r2,34
	srag    %r2,%r2,62
# else
	sll     %r2,2
	sra     %r2,30
# endif /* ! defined __s390x__  */
	br      %r14
.L_Z900_G5_12:
	clc     0(256,%r3),0(%r2)
	jne     .L_Z900_G5_4
	la      %r3,256(%r3)
	la      %r2,256(%r2)
	BRCTG   %r1,.L_Z900_G5_12
	j       .L_Z900_G5_3
.L_Z900_G5_15:
	clc     0(1,%r3),0(%r2)
END(MEMCMP_Z900_G5)
# undef LTGR
# undef AGHI
# undef BRCTG
#endif /* HAVE_MEMCMP_Z900_G5  */

#if HAVE_MEMCMP_Z10
ENTRY(MEMCMP_Z10)
	.machine "z10"
	.machinemode "zarch_nohighgprs"
# if !defined __s390x__
	llgfr	%r4,%r4
# endif /* !defined __s390x__  */
	ltgr    %r4,%r4
	je      .L_Z10_4
	aghi    %r4,-1
	srlg    %r1,%r4,8
	cgijlh  %r1,0,.L_Z10_12
.L_Z10_3:
	exrl    %r4,.L_Z10_15
.L_Z10_4:
	ipm     %r2
	sllg    %r2,%r2,34
	srag    %r2,%r2,62
	br      %r14
.L_Z10_12:
	pfd     1,512(%r3)
	pfd     1,512(%r2)
	clc     0(256,%r3),0(%r2)
	jne     .L_Z10_4
	la      %r3,256(%r3)
	la      %r2,256(%r2)
	brctg   %r1,.L_Z10_12
	j       .L_Z10_3
.L_Z10_15:
	clc     0(1,%r3),0(%r2)
END(MEMCMP_Z10)
#endif /* HAVE_MEMCMP_Z10  */

#if HAVE_MEMCMP_Z196
ENTRY(MEMCMP_Z196)
	.machine "z196"
	.machinemode "zarch_nohighgprs"
# if !defined __s390x__
	llgfr	%r4,%r4
# endif /* !defined __s390x__  */
	ltgr    %r4,%r4
	je      .L_Z196_4
	aghi    %r4,-1
	srlg    %r1,%r4,8
	ltgr    %r1,%r1
	jne     .L_Z196_2
.L_Z196_3:
	exrl    %r4,.L_Z196_14
.L_Z196_4:
	ipm     %r2
	sllg    %r2,%r2,34
	srag    %r2,%r2,62
	br      %r14
.L_Z196_17:
	la      %r3,256(%r3)
	la      %r2,256(%r2)
	aghi    %r1,-1
	je      .L_Z196_3
.L_Z196_2:
	pfd     1,512(%r3)
	pfd     1,512(%r2)
	clc     0(256,%r3),0(%r2)
	je      .L_Z196_17
	ipm     %r2
	sllg    %r2,%r2,34
	srag    %r2,%r2,62
	br      %r14
.L_Z196_14:
	clc     0(1,%r3),0(%r2)
END(MEMCMP_Z196)
#endif /* HAVE_MEMCMP_Z196  */

#if ! HAVE_MEMCMP_IFUNC
/* If we don't use ifunc, define an alias for memcmp here.
   Otherwise see sysdeps/s390/memcmp.c.  */
strong_alias (MEMCMP_DEFAULT, memcmp)
weak_alias (memcmp, bcmp)
strong_alias (memcmp, __memcmpeq)
libc_hidden_def (__memcmpeq)
#endif

#if defined SHARED && IS_IN (libc)
/* Defines the internal symbols.
   Compare to libc_hidden_builtin_def (memcmp) in string/memcmp.c.  */
strong_alias (MEMCMP_DEFAULT, __GI_memcmp)
#endif