sub: Wasm text instruction
The sub instructions, short for subtraction, 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 stack i32.const 10 i32.const 3 ;; subtract one number from the other i32.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 |