arch/csky/abiv1/memset.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #include <linux/types.h>
   5
   6 void *memset(void *dest, int c, size_t l)
   7 {
   8         char *d = dest;
   9         int ch = c & 0xff;
  10         int tmp = (ch | ch << 8 | ch << 16 | ch << 24);
  11
  12         while (((uintptr_t)d & 0x3) && l--)
  13                 *d++ = ch;
  14
  15         while (l >= 16) {
  16                 *(((u32 *)d))   = tmp;
  17                 *(((u32 *)d)+1) = tmp;
  18                 *(((u32 *)d)+2) = tmp;
  19                 *(((u32 *)d)+3) = tmp;
  20                 l -= 16;
  21                 d += 16;
  22         }
  23
  24         while (l > 3) {
  25                 *(((u32 *)d)) = tmp;
  26                 l -= 4;
  27                 d += 4;
  28         }
  29
  30         while (l) {
  31                 *d = ch;
  32                 l--;
  33                 d++;
  34         }
  35
  36         return dest;
  37 }