Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Copyright (C) 2000-2019 Free Software Foundation, Inc.
2 Contributed by Richard Henderson (rth@redhat.com)
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
19/* Copy no more than N bytes from SRC to DEST, returning the address of
20 the terminating '\0' in DEST. */
21
22#include <sysdep.h>
23
24 .arch ev6
25 .set noat
26 .set noreorder
27 .text
28
29ENTRY(__stpncpy)
30 ldgp gp, 0(pv)
31#ifdef PROF
32 lda AT, _mcount
33 jsr AT, (AT), _mcount
34#endif
35 .prologue 1
36
37 mov a0, v0
38 beq a2, $zerocount
39
40 .align 4
41 nop
42 nop
43 jsr t9, __stxncpy # do the work of the copy
44
45 cttz t8, t4
46 zapnot t0, t8, t5
47 andnot a0, 7, a0
48 bne a2, $multiword # do we have full words left?
49
50 subq t8, 1, t2
51 subq t10, 1, t3
52 cmpult zero, t5, t5
53 addq a0, t4, v0
54
55 or t2, t8, t2
56 or t3, t10, t3
57 addq v0, t5, v0
58 andnot t3, t2, t3
59
60 zap t0, t3, t0
61 nop
62 stq t0, 0(a0)
63 ret
64
65$multiword:
66 subq t8, 1, t7 # clear the final bits in the prev word
67 cmpult zero, t5, t5
68 or t7, t8, t7
69 zapnot t0, t7, t0
70
71 subq a2, 1, a2
72 stq t0, 0(a0)
73 addq a0, 8, a1
74 beq a2, 1f # loop over full words remaining
75
76 nop
77 nop
78 nop
79 blbc a2, 0f
80
81 stq zero, 0(a1)
82 subq a2, 1, a2
83 addq a1, 8, a1
84 beq a2, 1f
85
860: stq zero, 0(a1)
87 subq a2, 2, a2
88 nop
89 nop
90
91 stq zero, 8(a1)
92 addq a1, 16, a1
93 nop
94 bne a2, 0b
95
961: ldq t0, 0(a1) # clear the leading bits in the final word
97 subq t10, 1, t7
98 addq a0, t4, v0
99 nop
100
101 or t7, t10, t7
102 addq v0, t5, v0
103 zap t0, t7, t0
104 stq t0, 0(a1)
105
106$zerocount:
107 nop
108 nop
109 nop
110 ret
111
112 END(__stpncpy)
113
114libc_hidden_def (__stpncpy)
115weak_alias (__stpncpy, stpncpy)
116

Warning: That file was not part of the compilation database. It may have many parsing errors.