ArmPkg/CompilerIntrinsicsLib: Add memcmp, memmove intrinsics for MSFT

[mirror_edk2.git] / ArmPkg / Library / CompilerIntrinsicsLib / memmove_ms.c

//------------------------------------------------------------------------------\r
//\r
// Copyright (c) 2019, Pete Batard. All rights reserved.\r
//\r
// SPDX-License-Identifier: BSD-2-Clause-Patent\r
//\r
//------------------------------------------------------------------------------\r
\r
#if defined(_M_ARM64)\r
typedef unsigned __int64  size_t;\r
#else\r
typedef unsigned __int32  size_t;\r
#endif\r
\r
void* memmove(void *, const void *, size_t);\r
#pragma intrinsic(memmove)\r
#pragma function(memmove)\r
void* memmove(void *dest, const void *src, size_t n)\r
{\r
  unsigned char *d = dest;\r
  unsigned char const *s = src;\r
\r
  if (d < s) {\r
    while (n--)\r
      *d++ = *s++;\r
  } else {\r
    d += n;\r
    s += n;\r
    while (n--)\r
      *--d = *--s;\r
  }\r
\r
  return dest;\r
}\r