diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index f93d4616..0f6ff815 100644 --- a/configure.ac +++ b/configure.ac @@ -227,7 +227,7 @@ else [pulseaudio_cv_support_arm_atomic_ops=no]) ]) AS_IF([test "$pulseaudio_cv_support_arm_atomic_ops" = "yes"], [ - AC_DEFINE([ATOMIC_ARM_INLINE_ASM], 1, [Have ARMv6 instructions.]) + AC_DEFINE([ATOMIC_ARM_INLINE_ASM], 1, [Have ARM atomic instructions.]) need_libatomic_ops=no ]) fi @@ -246,6 +246,37 @@ else esac fi +# If we're on ARM, check for the ARMV6 instructions we need */ +case $host in + arm*) + AC_CACHE_CHECK([support for required armv6 instructions], + pulseaudio_cv_support_armv6, + [AC_COMPILE_IFELSE( + AC_LANG_PROGRAM([], + [[volatile int a = -60000, b = 0xaaaabbbb, c = 0xccccdddd; + asm volatile ("ldr r0, %2 \n" + "ldr r2, %3 \n" + "ldr r3, %4 \n" + "ssat r1, #8, r0 \n" + "str r1, %0 \n" + "pkhbt r1, r3, r2, LSL #8 \n" + "str r1, %1 \n" + : "=m" (a), "=m" (b) + : "m" (a), "m" (b), "m" (c) + : "r0", "r1", "r2", "r3", "cc"); + return (a == -128 && b == 0xaabbdddd) ? 0 : -1; + ]]), + [pulseaudio_cv_support_armv6=yes], + [pulseaudio_cv_support_armv6=no]) + ]) + AS_IF([test "$pulseaudio_cv_support_armv6" = "yes"], [ + AC_DEFINE([HAVE_ARMV6], 1, [Have ARMv6 instructions.]) + ]) + ;; + *) + ;; +esac + CC_CHECK_TLS AC_CACHE_CHECK([whether $CC knows _Bool], |