ArmPkg/Library/CompilerIntrinsicsLib/memcpy_ms.c

   1 // ------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2017, Pete Batard. 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 #if defined (_M_ARM64)
  11 typedef unsigned __int64 size_t;
  12 #else
  13 typedef unsigned __int32 size_t;
  14 #endif
  15
  16 void *
  17 memcpy (
  18   void *,
  19   const void *,
  20   size_t
  21   );
  22
  23 #pragma intrinsic(memcpy)
  24 #pragma function(memcpy)
  25 void *
  26 memcpy (
  27   void        *dest,
  28   const void  *src,
  29   size_t      n
  30   )
  31 {
  32   unsigned char        *d;
  33   unsigned char const  *s;
  34
  35   d = dest;
  36   s = src;
  37
  38   while (n-- != 0) {
  39     *d++ = *s++;
  40   }
  41
  42   return dest;
  43 }