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 David Mosberger (davidm@cs.arizona.edu).
3 EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <http://www.gnu.org/licenses/>. */
19
20/* Finds length of a 0-terminated string. */
21
22#include <sysdep.h>
23
24 .arch ev6
25 .set noreorder
26 .set noat
27
28ENTRY(strlen)
29#ifdef PROF
30 ldgp gp, 0(pv)
31 lda AT, _mcount
32 jsr AT, (AT), _mcount
33 .prologue 1
34#else
35 .prologue 0
36#endif
37
38 ldq_u $1, 0($16) # L : load first quadword ($16 may be misaligned)
39 lda $2, -1($31) # E :
40 insqh $2, $16, $2 # U :
41 andnot $16, 7, $0 # E :
42
43 or $2, $1, $1 # E :
44 cmpbge $31, $1, $2 # E : $2 <- bitmask: bit i == 1 <==> i-th byte == 0
45 nop # E :
46 bne $2, $found # U :
47
48$loop: ldq $1, 8($0) # L :
49 addq $0, 8, $0 # E : addr += 8
50 cmpbge $31, $1, $2 # E :
51 beq $2, $loop # U :
52
53$found:
54 cttz $2, $3 # U0 :
55 addq $0, $3, $0 # E :
56 subq $0, $16, $0 # E :
57 ret $31, ($26) # L0 :
58
59 END(strlen)
60libc_hidden_builtin_def (strlen)
61

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