This needs better examples. I find: v4si multiply_four(v4si a, v4si b) { return a*b; } Much more readable, and just as portable. There's a typedef for v4s

This needs better examples. I find: v4si multiply_four(v4si a, v4si b) { return a*b; } Much more readable, and just as portable. There's a typedef for v4si, of course, but you do that exactly once and then ignore it. The IR produced is identical, and therefore just as portable.