This attribute is supported for this architecture in MSVC as well
(but produces errors if used for 32 bit x86).
---
libavutil/intreadwrite.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h
index 84685f0..94abb6c 100644
--- a/libavutil/intreadwrite.h
+++ b/libavutil/intreadwrite.h
@@ -192,7 +192,7 @@ union unaligned_16 { uint16_t l; } __attribute__((packed))
av_alias;
# define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
# define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
-#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64)) &&
AV_HAVE_FAST_UNALIGNED
+#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64) ||
defined(_M_ARM64)) && AV_HAVE_FAST_UNALIGNED
# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
# define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
--
2.7.4
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