Copy sign

(module (import "console" "log" (func $log (param f32))) (func $main ;; load `10` and a negative number onto the stack f32.const 10 f32.const -2 f32.copysign ;; copy just the sign bit from second to the first number call $log ;; log the result ) (start $main) ) 

const url = "{%wasm-url%}"; await WebAssembly.instantiateStreaming(fetch(url), { console }); 

;; load two numbers onto the stack f32.const 10 f32.const -1 ;; copy just the sign bit from the second number (-1) to the first (10) f32.copysign ;; the top item on the stack will now be -10