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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@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.obj
ect_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 armv
4t\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 ar
mv4t\nqadd r3,r3,r3")])], |
| 94 [AC_MSG_RESULT([yes]) |
| 95 $1], |
| 96 [AC_MSG_RESULT([no]) |
| 97 $2]) |
| 98 ]) |
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