1 /*
2  * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  *
6  */
7 
8 #include "crt_impl_private.h"
9 
memset(void * s,int c,size_t n)10 void *memset(void *s, int c, size_t n)
11 {
12     union composite_addr_t p_mem;
13     uint32_t pattern_word;
14 
15     p_mem.p_byte = (uint8_t *)s;
16     pattern_word = (((uint32_t)c) << 24) | (((uint32_t)c) << 16) |
17                    (((uint32_t)c) << 8) | ((uint32_t)c);
18 
19     while (n && ADDR_WORD_UNALIGNED(p_mem.uint_addr)) {
20         *p_mem.p_byte++ = (uint8_t)c;
21         n--;
22     }
23 
24     while (n >= sizeof(uint32_t)) {
25         *p_mem.p_word++ = pattern_word;
26         n -= sizeof(uint32_t);
27     }
28 
29     while (n--) {
30         *p_mem.p_byte++ = (uint8_t)c;
31     }
32 
33     return s;
34 }
35