ArmPkg/Library/CompilerIntrinsicsLib/memcpy.c

   1 // ------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
   4 // Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
   5 //
   6 // SPDX-License-Identifier: BSD-2-Clause-Patent
   7 //
   8 // ------------------------------------------------------------------------------
   9
  10 typedef __SIZE_TYPE__ size_t;
  11
  12 static void
  13 __memcpy (
  14   void        *dest,
  15   const void  *src,
  16   size_t      n
  17   )
  18 {
  19   unsigned char        *d;
  20   unsigned char const  *s;
  21
  22   d = dest;
  23   s = src;
  24
  25   while (n-- != 0) {
  26     *d++ = *s++;
  27   }
  28 }
  29
  30 void *
  31 memcpy (
  32   void        *dest,
  33   const void  *src,
  34   size_t      n
  35   )
  36 {
  37   __memcpy (dest, src, n);
  38   return dest;
  39 }
  40
  41 #ifdef __arm__
  42
  43 __attribute__ ((__alias__ ("__memcpy")))
  44 void
  45 __aeabi_memcpy (
  46   void        *dest,
  47   const void  *src,
  48   size_t      n
  49   );
  50
  51 __attribute__ ((__alias__ ("__memcpy")))
  52 void
  53 __aeabi_memcpy4 (
  54   void        *dest,
  55   const void  *src,
  56   size_t      n
  57   );
  58
  59 __attribute__ ((__alias__ ("__memcpy")))
  60 void
  61 __aeabi_memcpy8 (
  62   void        *dest,
  63   const void  *src,
  64   size_t      n
  65   );
  66
  67 #endif