The convert numeric instructions are used for converting integer numbers to floating point numbers. There are signed and unsigned versions of this instruction.

(module
  (import "console" "log" (func $log (param f32)))
  (func $main

    i32.const 10 ;; push an i32 onto the stack

    f32.convert_i32_s ;; convert from signed i32 to f32

    call $log ;; log the result

  )
  (start $main)
)

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

Syntax

;; push an i32 onto the stack
i32.const 10

;; convert from signed i32 to f32
f32.convert_i32_s

;; the top item on the stack will now be the value 10 of type f32

InstructionBinary opcodef32.convert_i32_s0xb2f32.convert_i32_u0xb3f32.convert_i64_s0xb4f32.convert_i64_u0xb5f64.convert_i32_s0xb7f64.convert_i32_u0xb8f64.convert_i64_s0xb9f64.convert_i64_u0xba

Specifications

Browser compatibility