notes

abs via float is still better than function calls as emitted by gcc -O3 !!

(func $abs (type 2) (param i32) (result i32) (local i32) local.get 0 local.get 0 i32.const 31 i32.shr_s local.tee 1 i32.add local.get 1 i32.xor)

⚠️ specification and progress are out of sync