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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,

  AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[return __builtin_bswap32 (0) ;]])],[ac_cv_c_bswap32=yes],[ac_cv_c_bswap32=no])
  if test $ac_cv_c_bswap32 = yes; then
     AC_DEFINE_UNQUOTED(HAVE_BSWAP32, [1], [Compiler has the __builtin_bswap32 intrinsic])
    fi
  )]
)# 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,

  AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[return __builtin_bswap16 (0) ;]])],[ac_cv_c_bswap16=yes],[ac_cv_c_bswap16=no])
  if test $ac_cv_c_bswap16 = yes; then
     AC_DEFINE_UNQUOTED(HAVE_BSWAP16, [1], [Compiler has the __builtin_bswap16 intrinsic])
    fi
  )]
)# XIPH_C_BSWAP16