copy: Wasm text instruction

Thecopymemory instruction copies data from one region of a memory to another.

The instruction does not return a value.If either the source or destination range is out of bounds, the instruction traps.

Syntax

Copy within default memory

wat

;; Copy data in default memory from [100, 125] to [50, 75]i32.const 50 ;; Destination address to copy toi32.const 100 ;; Source address to copy fromi32.const 25 ;; Number of bytes to copymemory.copy  ;; Copy memory;; Copy in default memory using an S-function(memory.copy (i32.const 50) (i32.const 100) (i32.const 25))

Copy specified memory (if multi-memory supported)

wat

;; Copy data in specific memory  [100, 125] to [50, 75]i32.const 50 ;; Destination address to copy toi32.const 100 ;; Source address to copy fromi32.const 25 ;; Number of bytes to copymemory.copy (memory 2)  ;; Copy memory within memory with index 2;; Copy within memory referenced by its namei32.const 50 ;; Destination address to copy toi32.const 100 ;; Source address to copy fromi32.const 25 ;; Number of bytes to copymemory.copy (memory $memoryName) ;; Copy memory with memory named "$memoryName";; Copy same memory using an S function(memory.copy (memory $memoryName) (i32.const 50) (i32.const 100) (i32.const 25))