Chris@69: dnl opus-intrinsics.m4
Chris@69: dnl macro for testing for support for compiler intrinsics, either by default or with a compiler flag
Chris@69: 
Chris@69: dnl OPUS_CHECK_INTRINSICS(NAME-OF-INTRINSICS, COMPILER-FLAG-FOR-INTRINSICS, VAR-IF-PRESENT, VAR-IF-DEFAULT, TEST-PROGRAM-HEADER, TEST-PROGRAM-BODY)
Chris@69: AC_DEFUN([OPUS_CHECK_INTRINSICS],
Chris@69: [
Chris@69:    AC_MSG_CHECKING([if compiler supports $1 intrinsics])
Chris@69:    AC_LINK_IFELSE(
Chris@69:      [AC_LANG_PROGRAM($5, $6)],
Chris@69:      [
Chris@69:         $3=1
Chris@69:         $4=1
Chris@69:         AC_MSG_RESULT([yes])
Chris@69:       ],[
Chris@69:         $4=0
Chris@69:         AC_MSG_RESULT([no])
Chris@69:         AC_MSG_CHECKING([if compiler supports $1 intrinsics with $2])
Chris@69:         save_CFLAGS="$CFLAGS"; CFLAGS="$CFLAGS $2"
Chris@69:         AC_LINK_IFELSE([AC_LANG_PROGRAM($5, $6)],
Chris@69:         [
Chris@69:            AC_MSG_RESULT([yes])
Chris@69:            $3=1
Chris@69:         ],[
Chris@69:            AC_MSG_RESULT([no])
Chris@69:            $3=0
Chris@69:         ])
Chris@69:         CFLAGS="$save_CFLAGS"
Chris@69:      ])
Chris@69: ])