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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <sys/syscall.h>
22 #include <bits/arm_asm.h>
26 .type memset,%function
29 #if defined(THUMB1_ONLY)
33 cmp r2, #8 @ at least 8 bytes to do?
42 1: @ Fill up to the first word boundary
49 1: @ Fill aligned words
56 2: @ Fill the remaining bytes
70 cmp a3, $8 @ at least 8 bytes to do?
72 orr a2, a2, a2, lsl $8
73 orr a2, a2, a2, lsl $16
75 tst a4, $3 @ aligned yet?
76 #if defined(__thumb2__)
87 cmp a3, $8 @ 8 bytes still to do?
91 cmp a3, $8 @ 8 bytes still to do?
95 cmp a3, $8 @ 8 bytes still to do?
99 cmp a3, $8 @ 8 bytes still to do?
100 #if defined(__thumb2__)
102 stmiage a4!, {a2, ip}
105 stmgeia a4!, {a2, ip}
110 movs a3, a3 @ anything left?
112 #if defined(__USE_BX__)
117 #if defined (__thumb2__)
125 add pc, pc, a3, lsl $2
134 #if defined(__USE_BX__)
142 .size memset,.-memset
144 libc_hidden_def(memset)