cannam@154: dnl as-gcc-inline-assembly.m4 0.1.0
cannam@154: 
cannam@154: dnl autostars m4 macro for detection of gcc inline assembly
cannam@154: 
cannam@154: dnl David Schleef <ds@schleef.org>
cannam@154: 
cannam@154: dnl AS_COMPILER_FLAG(ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
cannam@154: dnl Tries to compile with the given CFLAGS.
cannam@154: dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
cannam@154: dnl and ACTION-IF-NOT-ACCEPTED otherwise.
cannam@154: 
cannam@154: AC_DEFUN([AS_GCC_INLINE_ASSEMBLY],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if compiler supports gcc-style inline assembly])
cannam@154: 
cannam@154:   AC_TRY_COMPILE([], [
cannam@154: #ifdef __GNUC_MINOR__
cannam@154: #if (__GNUC__ * 1000 + __GNUC_MINOR__) < 3004
cannam@154: #error GCC before 3.4 has critical bugs compiling inline assembly
cannam@154: #endif
cannam@154: #endif
cannam@154: __asm__ (""::) ], [flag_ok=yes], [flag_ok=no])
cannam@154: 
cannam@154:   if test "X$flag_ok" = Xyes ; then
cannam@154:     $1
cannam@154:     true
cannam@154:   else
cannam@154:     $2
cannam@154:     true
cannam@154:   fi
cannam@154:   AC_MSG_RESULT([$flag_ok])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_NEON],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports NEON instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("vorr d0,d0,d0")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_NEON_FORCE],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports NEON instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv7-a\n.fpu neon\n.object_arch armv4t\nvorr d0,d0,d0")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_MEDIA],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports ARMv6 media instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("shadd8 r3,r3,r3")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_MEDIA_FORCE],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports ARMv6 media instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv6\n.object_arch armv4t\nshadd8 r3,r3,r3")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_EDSP],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports EDSP instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__("qadd r3,r3,r3")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])
cannam@154: 
cannam@154: AC_DEFUN([AS_ASM_ARM_EDSP_FORCE],
cannam@154: [
cannam@154:   AC_MSG_CHECKING([if assembler supports EDSP instructions on ARM])
cannam@154: 
cannam@154:   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[__asm__(".arch armv5te\n.object_arch armv4t\nqadd r3,r3,r3")])],
cannam@154:                     [AC_MSG_RESULT([yes])
cannam@154:                      $1],
cannam@154:                     [AC_MSG_RESULT([no])
cannam@154:                      $2])
cannam@154: ])