index.md

---

title: Left rotate
slug: WebAssembly/Reference/Numeric/Left_rotate

---

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The rotl instructions, short for rotate-left, are used for performing a bitwise left-rotate.

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Syntax

;; load two numbers onto the stack
i32.const 3758096384 ;; 11100000_00000000_00000000_00000000
i32.const 1          ;; left rotate one spot

;; perform a bitwise left-rotate
i32.rotl

;; the top item on the stack will now be 3221225473
;; (11000000_00000000_00000000_00000001)

Instruction	Binary opcode
i32.rotl	0x77
i64.rotl	0x89