dnl Copyright (C) 2012-2022  Xiph.Org Foundation
dnl
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dnl modification, are permitted provided that the following conditions
dnl are met:
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dnl - Redistributions of source code must retain the above copyright
dnl notice, this list of conditions and the following disclaimer.
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dnl - Redistributions in binary form must reproduce the above copyright
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dnl documentation and/or other materials provided with the distribution.
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dnl ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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dnl @synopsis XIPH_C_BSWAP32
dnl
dnl @author Erik de Castro Lopo <erikd@mega-nerd.com>
dnl
dnl Dtermine whether the compiler has the __builtin_bswap32() intrinsic which
dnl is likely to be present for most versions of GCC as well as Clang.

AC_DEFUN([XIPH_C_BSWAP32],
[AC_CACHE_CHECK(for bswap32 intrinsic,
  ac_cv_c_bswap32,

  # Initialize to no
  ac_cv_c_bswap32=no
  HAVE_BSWAP32=0

  [AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[return __builtin_bswap32 (0) ;]])],[ac_cv_c_bswap32=yes
    HAVE_BSWAP32=1
  ],[])]
  AC_DEFINE_UNQUOTED(HAVE_BSWAP32, ${HAVE_BSWAP32},
    [Compiler has the __builtin_bswap32 intrinsic])

  )]
)# XIPH_C_BSWAP32


dnl @synopsis XIPH_C_BSWAP16
dnl
dnl @author Erik de Castro Lopo <erikd@mega-nerd.com>
dnl
dnl Dtermine whether the compiler has the __builtin_bswap16() intrinsic which
dnl is likely to be present for most versions of GCC as well as Clang.

AC_DEFUN([XIPH_C_BSWAP16],
[AC_CACHE_CHECK(for bswap16 intrinsic,
  ac_cv_c_bswap16,

  # Initialize to no
  ac_cv_c_bswap16=no
  HAVE_BSWAP16=0

  [AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[return __builtin_bswap16 (0) ;]])],[ac_cv_c_bswap16=yes
    HAVE_BSWAP16=1
  ],[])]
  AC_DEFINE_UNQUOTED(HAVE_BSWAP16, ${HAVE_BSWAP16},
    [Compiler has the __builtin_bswap16 intrinsic])

  )]
)# XIPH_C_BSWAP16