Not equal
The ne
instructions, short for not equal, check if two numbers are not equal. If the numbers are not equal 1
will be pushed on to the stack, otherwise 0
will be pushed on to the stack.
Try it
(module
(import "env" "log_bool" (func $log_bool (param i32)))
(func $main
;; load `10` and `2` onto the stack
i32.const 10
i32.const 2
i32.ne ;; check if `10` is not equal to `2`
call $log_bool ;; log the result
)
(start $main)
)
const url = "{%wasm-url%}";
function log_bool(value) {
console.log(Boolean(value));
// Expected output: true
}
await WebAssembly.instantiateStreaming(fetch(url), {
env: { log_bool },
});
Syntax
wasm
;; load 2 numbers on to the stack
local.get $num
i32.const 2
;; check if $num is not equal to '2'
i32.ne
;; if $num is not equal to `2`, `1` will be pushed on to the stack,
;; otherwise `0` will be pushed on to the stack.
Instruction | Binary opcode |
---|---|
i32.ne |
0x47 |
i64.ne |
0x52 |
f32.ne |
0x5c |
f64.ne |
0x62 |