* cranelift: Add `iabs.i128` runtest * riscv64: Fix incorrect extension in iabs When lowering iabs, we were accidentally comparing the unextended value this caused the instruction to misbehave with certain top bits. This commit also adds a zbb lowering that does not use jumps.
This crate contains the metaprogram used by cranelift-codegen. It's not useful on its own.