sub: Wasm text instruction
Thesub instructions, short forsubtraction, are used for subtracting one number from another number, similar to the- operator in other languages.
Try it
(module (import "console" "log" (func $log (param i32))) (func $main ;; load `10` and `3` onto the stack i32.const 10 i32.const 3 i32.sub ;; subtract on number from the other call $log ;; log the result ) (start $main))const url = "{%wasm-url%}";await WebAssembly.instantiateStreaming(fetch(url), { console });Syntax
wat
;; load two numbers onto the stacki32.const 10i32.const 3;; subtract one number from the otheri32.sub;; the top item on the stack will now be 7 (10 - 3 = 7)| Instruction | Binary opcode |
|---|---|
i32.sub | 0x6b |
i64.sub | 0x7d |
f32.sub | 0x93 |
f64.sub | 0xa1 |