Just write inline asm for x86 and aarch64 (if you care about that) and not care about the rest. Is it even useful to do simd on other processors? Compiler opt

Just write inline asm for x86 and aarch64 (if you care about that) and not care about the rest. Is it even useful to do simd on other processors? Compiler optimizing even the code around the simd code based on the semantics of arithmetic or other things sounds silly after writing some of this kind of code