cannam@154: dnl opus-intrinsics.m4
cannam@154: dnl macro for testing for support for compiler intrinsics, either by default or with a compiler flag
cannam@154: 
cannam@154: dnl OPUS_CHECK_INTRINSICS(NAME-OF-INTRINSICS, COMPILER-FLAG-FOR-INTRINSICS, VAR-IF-PRESENT, VAR-IF-DEFAULT, TEST-PROGRAM-HEADER, TEST-PROGRAM-BODY)
cannam@154: AC_DEFUN([OPUS_CHECK_INTRINSICS],
cannam@154: [
cannam@154:    AC_MSG_CHECKING([if compiler supports $1 intrinsics])
cannam@154:    AC_LINK_IFELSE(
cannam@154:      [AC_LANG_PROGRAM($5, $6)],
cannam@154:      [
cannam@154:         $3=1
cannam@154:         $4=1
cannam@154:         AC_MSG_RESULT([yes])
cannam@154:       ],[
cannam@154:         $4=0
cannam@154:         AC_MSG_RESULT([no])
cannam@154:         AC_MSG_CHECKING([if compiler supports $1 intrinsics with $2])
cannam@154:         save_CFLAGS="$CFLAGS"; CFLAGS="$CFLAGS $2"
cannam@154:         AC_LINK_IFELSE([AC_LANG_PROGRAM($5, $6)],
cannam@154:         [
cannam@154:            AC_MSG_RESULT([yes])
cannam@154:            $3=1
cannam@154:         ],[
cannam@154:            AC_MSG_RESULT([no])
cannam@154:            $3=0
cannam@154:         ])
cannam@154:         CFLAGS="$save_CFLAGS"
cannam@154:      ])
cannam@154: ])