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      1 dnl as-gcc-inline-assembly.m4 0.1.0
      2 
      3 dnl autostars m4 macro for detection of gcc inline assembly
      4 
      5 dnl David Schleef <ds (a] schleef.org>
      6 
      7 dnl AS_COMPILER_FLAG(ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
      8 dnl Tries to compile with the given CFLAGS.
      9 dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
     10 dnl and ACTION-IF-NOT-ACCEPTED otherwise.
     11 
     12 AC_DEFUN([AS_GCC_INLINE_ASSEMBLY],
     13 [
     14   AC_MSG_CHECKING([if compiler supports gcc-style inline assembly])
     15 
     16   AC_TRY_COMPILE([], [
     17 #ifdef __GNUC_MINOR__
     18 #if (__GNUC__ * 1000 + __GNUC_MINOR__) < 3004
     19 #error GCC before 3.4 has critical bugs compiling inline assembly
     20 #endif
     21 #endif
     22 __asm__ (""::) ], [flag_ok=yes], [flag_ok=no])
     23 
     24   if test "X$flag_ok" = Xyes ; then
     25     $1
     26     true
     27   else
     28     $2
     29     true
     30   fi
     31   AC_MSG_RESULT([$flag_ok])
     32 ])
     33 
     34 AC_DEFUN([AS_ASM_ARM_NEON],
     35 [
     36   AC_MSG_CHECKING([if assembler supports NEON instructions on ARM])
     37 
     38   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("vorr d0,d0,d0")])],
     39                     [AC_MSG_RESULT([yes])
     40                      $1],
     41                     [AC_MSG_RESULT([no])
     42                      $2])
     43 ])
     44 
     45 AC_DEFUN([AS_ASM_ARM_NEON_FORCE],
     46 [
     47   AC_MSG_CHECKING([if assembler supports NEON instructions on ARM])
     48 
     49   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv7-a\n.fpu neon\n.object_arch armv4t\nvorr d0,d0,d0")])],
     50                     [AC_MSG_RESULT([yes])
     51                      $1],
     52                     [AC_MSG_RESULT([no])
     53                      $2])
     54 ])
     55 
     56 AC_DEFUN([AS_ASM_ARM_MEDIA],
     57 [
     58   AC_MSG_CHECKING([if assembler supports ARMv6 media instructions on ARM])
     59 
     60   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("shadd8 r3,r3,r3")])],
     61                     [AC_MSG_RESULT([yes])
     62                      $1],
     63                     [AC_MSG_RESULT([no])
     64                      $2])
     65 ])
     66 
     67 AC_DEFUN([AS_ASM_ARM_MEDIA_FORCE],
     68 [
     69   AC_MSG_CHECKING([if assembler supports ARMv6 media instructions on ARM])
     70 
     71   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv6\n.object_arch armv4t\nshadd8 r3,r3,r3")])],
     72                     [AC_MSG_RESULT([yes])
     73                      $1],
     74                     [AC_MSG_RESULT([no])
     75                      $2])
     76 ])
     77 
     78 AC_DEFUN([AS_ASM_ARM_EDSP],
     79 [
     80   AC_MSG_CHECKING([if assembler supports EDSP instructions on ARM])
     81 
     82   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("qadd r3,r3,r3")])],
     83                     [AC_MSG_RESULT([yes])
     84                      $1],
     85                     [AC_MSG_RESULT([no])
     86                      $2])
     87 ])
     88 
     89 AC_DEFUN([AS_ASM_ARM_EDSP_FORCE],
     90 [
     91   AC_MSG_CHECKING([if assembler supports EDSP instructions on ARM])
     92 
     93   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv5te\n.object_arch armv4t\nqadd r3,r3,r3")])],
     94                     [AC_MSG_RESULT([yes])
     95                      $1],
     96                     [AC_MSG_RESULT([no])
     97                      $2])
     98 ])
     99