升级
promote 指令用于将 f32 类型数字转换为 f64 类型（提升）。
试一试
(module
(import "console" "log" (func $log (param f64)))
(func $main
f32.const 10.5 ;; push an f32 onto the stack
f64.promote_f32 ;; promote from f32 to f64
call $log ;; log the result
)
(start $main)
)
const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url), { console });
语法
wat
;; push an f32 onto the stack
f32.const 10.5
;; promote from f32 to f64
f64.promote_f32
;; the top item on the stack will now be the value 10.5 of type f64
| 指令 | 二进制操作码 |
|---|---|
f64.promote_f32 |
0xbb |