Promote

The promote instruction, is used to convert (promote) numbers of type f32 to type f64.

Try it

Syntax

wasm

;; push an f32 onto the stack
f32.const 10.5

;; promote from f32 to f64
f64.promote_f32

;; the top item on the stack will now be the value 10.5 of type f64
Instruction Binary opcode
f64.promote_f32 0xbb