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fithisux

Why not just writing inline assembly is not enough?

You optimize for a specific target.

The problem is that you cannot be cross-platform. Sure.

But that is why software is incremental.

I write for my HW, not yours. You can write for yours.

Make folders with implemntations

x86_v1 x86_v2 arm64 riscv64 ... ... ...

and include

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sadly inline assembly is still at the ergonomics of "one compiler doesn't support it in x64 mode" and "you can choose between the readable syntax (which is a black box to the compiler) and the unreadable syntax (which can specify I/O/clobber regs)"

OK, is there a horrible speed penalty for writing your SIMD in pure assembly functions and then calling those functions? If you're writing assembly anyway, just drop the "inline" part.

Sure, if you're willing to write a large enough chunk that you can eat the cost of not inlining it. If you just write a small leaf function or two, it will probably be a wash or perform worse.

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