1 /* Copyright (C) 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Philip Blundell <philb@gnu.org>
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.
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.
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/>. */
20 #include <sys/syscall.h>
21 #include <bits/arm_asm.h>
25 .type memset,%function
28 #if defined(THUMB1_ONLY)
32 cmp r2, #8 @ at least 8 bytes to do?
41 1: @ Fill up to the first word boundary
48 1: @ Fill aligned words
55 2: @ Fill the remaining bytes
69 cmp a3, $8 @ at least 8 bytes to do?
71 orr a2, a2, a2, lsl $8
72 orr a2, a2, a2, lsl $16
74 tst a4, $3 @ aligned yet?
75 #if defined(__thumb2__)
86 cmp a3, $8 @ 8 bytes still to do?
90 cmp a3, $8 @ 8 bytes still to do?
94 cmp a3, $8 @ 8 bytes still to do?
98 cmp a3, $8 @ 8 bytes still to do?
99 #if defined(__thumb2__)
101 stmiage a4!, {a2, ip}
104 stmgeia a4!, {a2, ip}
109 movs a3, a3 @ anything left?
111 #if defined(__USE_BX__)
116 #if defined (__thumb2__)
124 add pc, pc, a3, lsl $2
133 #if defined(__USE_BX__)
141 .size memset,.-memset
143 libc_hidden_def(memset)