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d626a24f | 1 | /* Vector optimized 32/64 bit S/390 version of strcat. |
04277e02 | 2 | Copyright (C) 2015-2019 Free Software Foundation, Inc. |
d626a24f SL |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
8e5a0afb SL |
19 | #include <ifunc-strcat.h> |
20 | #if HAVE_STRCAT_Z13 | |
d626a24f SL |
21 | |
22 | # include "sysdep.h" | |
23 | # include "asm-syntax.h" | |
24 | ||
25 | .text | |
26 | ||
27 | /* char * strcat (const char *dest, const char *src) | |
28 | Concatenate two strings. | |
29 | ||
30 | Register usage: | |
31 | -r0=saved dest pointer for return | |
32 | -r1=tmp | |
33 | -r2=dest | |
34 | -r3=src | |
35 | -r4=tmp | |
36 | -r5=current_len | |
37 | -v16=part of src | |
38 | -v17=index of zero | |
39 | -v18=part of src | |
40 | */ | |
8e5a0afb | 41 | ENTRY(STRCAT_Z13) |
d626a24f SL |
42 | .machine "z13" |
43 | .machinemode "zarch_nohighgprs" | |
44 | ||
45 | lgr %r0,%r2 /* Save destination pointer for return. */ | |
46 | ||
47 | /* STRLEN | |
48 | r1 = loaded bytes (tmp) | |
49 | r4 = zero byte index (tmp) | |
50 | r2 = dst | |
51 | */ | |
52 | vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ | |
53 | lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ | |
54 | ||
55 | vfenezb %v16,%v16,%v16 /* Find element not equal with zero search. */ | |
56 | vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */ | |
57 | clrjl %r5,%r1,.Llen_end /* Found zero within loaded bytes, end. */ | |
58 | ||
59 | /* Align s to 16 byte. */ | |
60 | risbgn %r1,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ | |
61 | lghi %r5,16 /* current_len = 16. */ | |
62 | slr %r5,%r1 /* Compute bytes to 16bytes boundary. */ | |
63 | ||
64 | /* Find zero in 16byte aligned loop. */ | |
65 | .Llen_loop: | |
66 | vl %v16,0(%r5,%r2) /* Load s. */ | |
67 | vfenezbs %v16,%v16,%v16 /* Find element not equal with zero search. */ | |
68 | je .Llen_found /* Jump away if zero was found. */ | |
69 | vl %v16,16(%r5,%r2) | |
70 | vfenezbs %v16,%v16,%v16 | |
71 | je .Llen_found16 | |
72 | vl %v16,32(%r5,%r2) | |
73 | vfenezbs %v16,%v16,%v16 | |
74 | je .Llen_found32 | |
75 | vl %v16,48(%r5,%r2) | |
76 | vfenezbs %v16,%v16,%v16 | |
77 | je .Llen_found48 | |
78 | ||
79 | aghi %r5,64 | |
80 | j .Llen_loop /* No zero -> loop. */ | |
81 | ||
82 | .Llen_found48: | |
83 | aghi %r5,16 | |
84 | .Llen_found32: | |
85 | aghi %r5,16 | |
86 | .Llen_found16: | |
87 | aghi %r5,16 | |
88 | .Llen_found: | |
89 | vlgvb %r4,%v16,7 /* Load byte index of zero. */ | |
90 | algr %r5,%r4 | |
91 | ||
92 | .Llen_end: | |
93 | /* STRCPY | |
94 | %r1 = loaded bytes (tmp) | |
95 | %r4 = zero byte index (tmp) | |
96 | %r3 = curr src pointer | |
97 | %r2 = curr dst pointer | |
98 | */ | |
99 | la %r2,0(%r5,%r2) /* strcpy at end of dst-string. */ | |
100 | ||
101 | vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */ | |
102 | lcbb %r1,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */ | |
103 | ||
104 | vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */ | |
105 | vlgvb %r5,%v17,7 /* Load zero index or 16 if not found. */ | |
106 | clrjl %r5,%r1,.Lcpy_found_align /* If found zero within loaded bytes, | |
107 | copy bytes before and return. */ | |
108 | ||
109 | /* Align s to 16 byte. */ | |
110 | risbgn %r4,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ | |
111 | lghi %r5,15 /* current_len = 15. */ | |
112 | slr %r5,%r4 /* Compute highest index to 16byte boundary. */ | |
113 | ||
114 | vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */ | |
115 | ahi %r5,1 /* Start loop at next character. */ | |
116 | ||
117 | /* Find zero in 16byte aligned loop. */ | |
118 | .Lcpy_loop: | |
119 | vl %v16,0(%r5,%r3) /* Load s. */ | |
120 | vfenezbs %v17,%v16,%v16 /* Find element not equal with zero search. */ | |
121 | je .Lcpy_found_v16_0 /* Jump away if zero was found. */ | |
122 | vl %v18,16(%r5,%r3)/* Load next part of s. */ | |
123 | vst %v16,0(%r5,%r2) /* Store previous part without zero to dst. */ | |
124 | vfenezbs %v17,%v18,%v18 | |
125 | je .Lcpy_found_v18_16 | |
126 | vl %v16,32(%r5,%r3) | |
127 | vst %v18,16(%r5,%r2) | |
128 | vfenezbs %v17,%v16,%v16 | |
129 | je .Lcpy_found_v16_32 | |
130 | vl %v18,48(%r5,%r3) | |
131 | vst %v16,32(%r5,%r2) | |
132 | vfenezbs %v17,%v18,%v18 | |
133 | je .Lcpy_found_v18_48 | |
134 | vst %v18,48(%r5,%r2) | |
135 | ||
136 | aghi %r5,64 | |
137 | j .Lcpy_loop /* No zero -> loop. */ | |
138 | ||
139 | .Lcpy_found_v16_32: | |
140 | aghi %r5,32 | |
141 | .Lcpy_found_v16_0: | |
142 | la %r4,0(%r5,%r2) | |
143 | vlgvb %r1,%v17,7 /* Load byte index of zero. */ | |
144 | vstl %v16,%r1,0(%r4) /* Copy characters including zero. */ | |
145 | lgr %r2,%r0 /* Load saved dest-ptr. */ | |
146 | br %r14 | |
147 | ||
148 | .Lcpy_found_v18_48: | |
149 | aghi %r5,32 | |
150 | .Lcpy_found_v18_16: | |
151 | la %r4,16(%r5,%r2) | |
152 | vlgvb %r1,%v17,7 /* Load byte index of zero. */ | |
153 | vstl %v18,%r1,0(%r4) /* Copy characters including zero. */ | |
154 | lgr %r2,%r0 /* Load saved dest-ptr. */ | |
155 | br %r14 | |
156 | ||
157 | .Lcpy_found_align: | |
158 | vstl %v16,%r5,0(%r2) /* Copy characters including zero. */ | |
159 | lgr %r2,%r0 /* Load saved dest-ptr. */ | |
160 | br %r14 | |
8e5a0afb SL |
161 | END(STRCAT_Z13) |
162 | ||
163 | # if ! HAVE_STRCAT_IFUNC | |
164 | strong_alias (STRCAT_Z13, strcat) | |
165 | # endif | |
166 | ||
167 | # if ! HAVE_STRCAT_C && defined SHARED && IS_IN (libc) | |
168 | strong_alias (STRCAT_Z13, __GI_strcat) | |
169 | # endif | |
170 | #endif |