ref: 006273c59f35ca10f1ab9b4cad36fdd7550b754b
dir: /m4/as-gcc-inline-assembly.m4/
dnl as-gcc-inline-assembly.m4 0.1.0 dnl autostars m4 macro for detection of gcc inline assembly dnl David Schleef <[email protected]> dnl $Id$ dnl AS_COMPILER_FLAG(ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED]) dnl Tries to compile with the given CFLAGS. dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags, dnl and ACTION-IF-NOT-ACCEPTED otherwise. AC_DEFUN([AS_GCC_INLINE_ASSEMBLY], [ AC_MSG_CHECKING([if compiler supports gcc-style inline assembly]) AC_TRY_COMPILE([], [ #ifdef __GNUC_MINOR__ #if (__GNUC__ * 1000 + __GNUC_MINOR__) < 3004 #error GCC before 3.4 has critical bugs compiling inline assembly #endif #endif __asm__ (""::) ], [flag_ok=yes], [flag_ok=no]) if test "X$flag_ok" = Xyes ; then $1 true else $2 true fi AC_MSG_RESULT([$flag_ok]) ]) AC_DEFUN([AC_TRY_ASSEMBLE], [ac_c_ext=$ac_ext ac_ext=${ac_s_ext-s} cat > conftest.$ac_ext <<EOF .file "configure" [$1] EOF if AC_TRY_EVAL(ac_compile); then ac_ext=$ac_c_ext ifelse([$2], , :, [ $2 rm -rf conftest*]) else echo "configure: failed program was:" >&AC_FD_CC cat conftest.$ac_ext >&AC_FD_CC ac_ext=$ac_c_ext ifelse([$3], , , [ rm -rf conftest* $3 ])dnl fi rm -rf conftest*]) AC_DEFUN([AS_ASM_ARM_NEON], [ AC_MSG_CHECKING([if assembler supports NEON instructions on ARM]) AC_TRY_ASSEMBLE([vorr d0,d0,d0], [flag_ok=yes], [flag_ok=no]) if test "X$flag_ok" = Xyes ; then $1 true else $2 true fi AC_MSG_RESULT([$flag_ok]) ]) AC_DEFUN([AS_ASM_ARM_MEDIA], [ AC_MSG_CHECKING([if assembler supports ARMv6 media instructions on ARM]) AC_TRY_ASSEMBLE([shadd8 r3,r3,r3], [flag_ok=yes], [flag_ok=no]) if test "X$flag_ok" = Xyes ; then $1 true else $2 true fi AC_MSG_RESULT([$flag_ok]) ]) AC_DEFUN([AS_ASM_ARM_EDSP], [ AC_MSG_CHECKING([if assembler supports EDSP instructions on ARM]) AC_TRY_ASSEMBLE([qadd r3,r3,r3], [flag_ok=yes], [flag_ok=no]) if test "X$flag_ok" = Xyes ; then $1 true else $2 true fi AC_MSG_RESULT([$flag_ok]) ])