Absolute
The abs instructions, short for absolute, are used to get the absolute value of a number. That is, it returns x if x is positive, and the negation of x if x is negative.
Try it
(module (import "console" "log" (func $log (param f32))) (func $main f32.const -10 ;; load a number onto the stack f32.abs ;; calculate the absolute value 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 ;; absolute f32.abs ;; the top item on the stack will now be 2 | Instruction | Binary opcode |
|---|---|
f32.abs | 0x8b |
f64.abs | 0x99 |
