Negate
The neg instructions, short for negate, are used to negate a number. That is, turn a positive number into a negative number and a negative number into a positive number.
Try it
(module
(import "console" "log" (func $log (param f32)))
(func $main
f32.const 10 ;; load a number onto the stack
f32.neg ;; negate the values
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
;; negate
f32.neg
;; the top item on the stack will now be -2.7
| Instruction | Binary opcode |
|---|---|
f32.neg |
0x8c |
f64.neg |
0x9a |