I think that's somewhat intentional? The name stands for [Intel [Single Program Multiple Data] Program Compiler], not "SIMD"/"Instruction". I'd expect switching

I think that's somewhat intentional? The name stands for [Intel [Single Program Multiple Data] Program Compiler], not "SIMD"/"Instruction". I'd expect switching lane depth (4 shorts or 4 bytes) to work fine, but switching SIMD width (8 or 16 lanes) seems out of scope for "run 4 instances of this program in lockstep".