BaseTools: Add DevicePath support for PCD values

[mirror_edk2.git] / StdLib / LibC / Main / bswap64.c

/*  $NetBSD: bswap64.c,v 1.1 2005/12/20 19:28:51 christos Exp $    */\r
\r
/*\r
 * Written by Manuel Bouyer <bouyer@NetBSD.org>.\r
 * Public domain.\r
 */\r
\r
//#include <sys/cdefs.h>\r
//#if defined(LIBC_SCCS) && !defined(lint)\r
//__RCSID("$NetBSD: bswap64.c,v 1.1 2005/12/20 19:28:51 christos Exp $");\r
//#endif /* LIBC_SCCS and not lint */\r
\r
//#include <sys/types.h>\r
//#include <machine/bswap.h>\r
\r
#undef bswap64\r
\r
UINT64\r
bswap64(UINT64 x)\r
{\r
#ifndef _LP64\r
  /*\r
   * Assume we have wide enough registers to do it without touching\r
   * memory.\r
   */\r
  return  ( (x << 56) & 0xff00000000000000UL ) |\r
    ( (x << 40) & 0x00ff000000000000UL ) |\r
    ( (x << 24) & 0x0000ff0000000000UL ) |\r
    ( (x <<  8) & 0x000000ff00000000UL ) |\r
    ( (x >>  8) & 0x00000000ff000000UL ) |\r
    ( (x >> 24) & 0x0000000000ff0000UL ) |\r
    ( (x >> 40) & 0x000000000000ff00UL ) |\r
    ( (x >> 56) & 0x00000000000000ffUL );\r
#else\r
  /*\r
   * Split the operation in two 32bit steps.\r
   */\r
  u_int32_t tl, th;\r
\r
  th = bswap32((u_int32_t)(x & 0x00000000ffffffffULL));\r
  tl = bswap32((u_int32_t)((x >> 32) & 0x00000000ffffffffULL));\r
  return ((u_int64_t)th << 32) | tl;\r
#endif\r
}\r