Further, x86 only provides these SIMD operations on 8-bit and 16-bit quantities, not on 32-bit or 64-bit quantities (although all these types can be packed into a SIMD register and operated on with at least some operations; for example regular, non-saturating add).
SSE has a menagerie of non-orthogonal oddities, unfortunately; this is only one of them.
Further, x86 only provides these SIMD operations on 8-bit and 16-bit quantities, not on 32-bit or 64-bit quantities (although all these types can be packed into a SIMD register and operated on with at least some operations; for example regular, non-saturating add).
SSE has a menagerie of non-orthogonal oddities, unfortunately; this is only one of them.