Ceil

The ceil instructions, are used for getting the value of a number rounded up to the next integer.

Try it

(module (import "console" "log" (func $log (param f32))) (func $main f32.const 2.7 ;; load a number onto the stack f32.ceil ;; round up call $log ;; log the result ) (start $main) ) 
const url = "{%wasm-url%}"; await WebAssembly.instantiateStreaming(fetch(url), { console }); 

Syntax

wat
;; load a number onto the stack f32.const 2.7 ;; round up f32.ceil ;; the top item on the stack will now be 3 
Instruction Binary opcode
f32.ceil 0x8d
f64.ceil 0x9b