narrow_i32x4_u: Wasm SIMD conversion instruction
The narrow_i32x4_u SIMD conversion instruction converts two signed v128 i32x4 value interpretations into an i16x8 value interpretation using unsigned saturation (clamping to the range between 0 to 65,535).
Try it
(module
(import "console" "log" (func $log (param i32)))
(func $main
v128.const i32x4 200 210 220 230
v128.const i32x4 300 310 320 330
i16x8.narrow_i32x4_u
i16x8.extract_lane_s 7
call $log ;; log the result
)
(start $main)
)
WebAssembly.instantiateStreaming(fetch("{%wasm-url%}"), { console });
Syntax
i16x8.narrow_i32x4_u
i16x8.narrow_i32x4_u-
The
i16x8.narrow_i32x4_uinstruction.
Type
[input1, input2] -> [output]
Binary encoding
| Instruction | Binary format | Example text => binary |
|---|---|---|
i16x8.narrow_i32x4_u |
0xfd 134:u32 |
i16x8.narrow_i32x4_u => 0xfd 0x86 0x01 |