extend_high_i16x8_s: Wasm SIMD conversion instruction

The extend_high_i16x8_s SIMD conversion instruction converts lanes 4–7 of a signed v128 i16x8 value interpretation into an i32x4 value interpretation.

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (func $main
    v128.const i16x8 200 210 220 230 240 250 260 270

    i32x4.extend_high_i16x8_s
    i32x4.extract_lane 0
    call $log ;; log the result
  )
  (start $main)
)

WebAssembly.instantiateStreaming(fetch("{%wasm-url%}"), { console });

Syntax

i32x4.extend_high_i16x8_s

i32x4.extend_high_i16x8_s

The i32x4.extend_high_i16x8_s instruction.

Type

[input] -> [output]

input

The input v128 i16x8 value interpretation.

output

The output v128 i32x4 value interpretation.

Binary encoding

Specifications

• WebAssembly Core Specification