Extend
The extend instructions, are used to convert (extend) numbers of type i32 to type i64. There are signed and unsigned versions of this instruction.
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Syntax
wasm
;; push an i32 onto the stack
i32.const 10
;; sign-extend from i32 to i64
i64.extend_i32_s
;; the top item on the stack will now be the value 10 of type i64
| Instruction | Binary opcode |
|---|---|
i64.extend_i32_s |
0xac |
i64.extend_i32_u |
0xad |