Oops, I used `#pragma pack` incorrectly in my code, but it doesn't change the codegen for the 96-bit structs other than offsets. Also `restrict` is only needed

Oops, I used `#pragma pack` incorrectly in my code, but it doesn't change the codegen for the 96-bit structs other than offsets. Also `restrict` is only needed on the output argument to enable full vectorization of the 128-bit structs. New link: https://godbolt.org/g/8uGn4h https://godbolt.org/g/8uGn4h