minimal fix for PR5743


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91032 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Headers/tmmintrin.h b/lib/Headers/tmmintrin.h
index 374a27e..00bfa27 100644
--- a/lib/Headers/tmmintrin.h
+++ b/lib/Headers/tmmintrin.h
@@ -66,8 +66,8 @@
     return (__m128i)__builtin_ia32_pabsd128((__v4si)a);
 }
 
-#define _mm_alignr_epi8(a, b, n) (__builtin_ia32_palignr128((a), (b), (n)))
-#define _mm_alignr_pi8(a, b, n) (__builtin_ia32_palignr((a), (b), (n)))
+#define _mm_alignr_epi8(a, b, n) (__builtin_ia32_palignr128((a), (b), (n*8)))
+#define _mm_alignr_pi8(a, b, n) (__builtin_ia32_palignr((a), (b), (n*8)))
 
 static inline __m128i __attribute__((__always_inline__, __nodebug__))
 _mm_hadd_epi16(__m128i a, __m128i b)