1 files changed, 11 insertions, 1 deletions
diff --git a/common.h b/common.h
index 958c7b0..edfaed7 100644
--- a/common.h
+++ b/common.h
@@ -29,7 +29,8 @@
 
 
 #if defined(__GNUC__)
-# define LIBAR2_WEAKLY_LINKED__ __attribute__((weak))
+# define LIBAR2_WEAKLY_LINKED__ __attribute__((__weak__))
+# define LIBAR2_TARGET__(TARGETS) __attribute__((__target__(TARGETS)))
 #endif
 
 
@@ -86,6 +87,15 @@
 #endif
 
 
+#if defined(__x86_64__) && defined(LIBAR2_TARGET__)
+# define MAX_SIMD_ALIGNMENT 64
+# define SIMD_ALIGNED _Alignas(MAX_SIMD_ALIGNMENT)
+#else
+# define MAX_SIMD_ALIGNMENT 1
+# define SIMD_ALIGNED /* use the types native alignment */
+#endif
+
+
 #define ELEMSOF(ARR) (sizeof(ARR) / sizeof(*(ARR)))
 
 #define MAX(A, B) ((A) > (B) ? (A) : (B))