Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 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.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 | ]) |