1dnl Copyright (C) 2012-2023 Xiph.Org Foundation 2dnl 3dnl Redistribution and use in source and binary forms, with or without 4dnl modification, are permitted provided that the following conditions 5dnl are met: 6dnl 7dnl - Redistributions of source code must retain the above copyright 8dnl notice, this list of conditions and the following disclaimer. 9dnl 10dnl - Redistributions in binary form must reproduce the above copyright 11dnl notice, this list of conditions and the following disclaimer in the 12dnl documentation and/or other materials provided with the distribution. 13dnl 14dnl - Neither the name of the Xiph.org Foundation nor the names of its 15dnl contributors may be used to endorse or promote products derived from 16dnl this software without specific prior written permission. 17dnl 18dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19dnl ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 22dnl CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23dnl EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24dnl PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 25dnl PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 26dnl LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 27dnl NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28dnl SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 31dnl @synopsis XIPH_C_BSWAP32 32dnl 33dnl @author Erik de Castro Lopo <[email protected]> 34dnl 35dnl Dtermine whether the compiler has the __builtin_bswap32() intrinsic which 36dnl is likely to be present for most versions of GCC as well as Clang. 37 38AC_DEFUN([XIPH_C_BSWAP32], 39[AC_CACHE_CHECK(for bswap32 intrinsic, 40 ac_cv_c_bswap32, 41 42 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[return __builtin_bswap32 (0) ;]])],[ac_cv_c_bswap32=yes],[ac_cv_c_bswap32=no]) 43 if test $ac_cv_c_bswap32 = yes; then 44 AC_DEFINE_UNQUOTED(HAVE_BSWAP32, [1], [Compiler has the __builtin_bswap32 intrinsic]) 45 fi 46 )] 47)# XIPH_C_BSWAP32 48 49 50dnl @synopsis XIPH_C_BSWAP16 51dnl 52dnl @author Erik de Castro Lopo <[email protected]> 53dnl 54dnl Dtermine whether the compiler has the __builtin_bswap16() intrinsic which 55dnl is likely to be present for most versions of GCC as well as Clang. 56 57AC_DEFUN([XIPH_C_BSWAP16], 58[AC_CACHE_CHECK(for bswap16 intrinsic, 59 ac_cv_c_bswap16, 60 61 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[return __builtin_bswap16 (0) ;]])],[ac_cv_c_bswap16=yes],[ac_cv_c_bswap16=no]) 62 if test $ac_cv_c_bswap16 = yes; then 63 AC_DEFINE_UNQUOTED(HAVE_BSWAP16, [1], [Compiler has the __builtin_bswap16 intrinsic]) 64 fi 65 )] 66)# XIPH_C_BSWAP16 67