+#!+sb-simd-pack
+(define-primitive-object (simd-pack
+ :lowtag other-pointer-lowtag
+ :widetag simd-pack-widetag)
+ (tag :ref-trans %simd-pack-tag
+ :attributes (movable flushable)
+ :type fixnum)
+ (lo-value :c-type "long" :type (unsigned-byte 64))
+ (hi-value :c-type "long" :type (unsigned-byte 64)))
+