global.get: Wasm variable instruction

The global.get variable instruction loads the value of a global variable onto the stack.

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (global $var i32 (i32.const 10))
  (func $main

    global.get $var ;; Load the value of $var variable onto the stack
    call $log ;; Log the result

  )
  (start $main)
)

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

Syntax

global.get identifier

global.get

The global.get instruction type. Must always be included first.

identifier

An identifier for the global whose value you want to get. This can be one of the following:

name

The identifying name set for the global when it was declared. This must begin with a $ symbol, for example $my_global.

index

The global's index number, for example 0 for the first global in the Wasm script, 1 for the second, etc.

Type

[] -> [output]

output

The global value retrieved by the global.get instruction.

Opcodes

Specifications

• WebAssembly Core Specification

See also

• global
• global.set