Max

The max instructions, are used for getting the higher of two numbers.

Try it

(module (import "console" "log" (func $log (param f32))) (func $main ;; load `10` and `2` onto the stack f32.const 10 f32.const 2 f32.max ;; calculate the higher number call $log ;; log the result ) (start $main) ) 
const url = "{%wasm-url%}"; await WebAssembly.instantiateStreaming(fetch(url), { console }); 

Syntax

wat
;; load two numbers onto the stack f32.const 10 f32.const 3 ;; get higher number f32.max ;; the top item on the stack will now be 10 
Instruction Binary opcode
f32.max 0x97
f64.max 0xa5