The extend_high_i16x8_u SIMD conversion instruction converts lanes 4–7 of an unsigned v128 i16x8 value interpretation into an i32x4 value interpretation.

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

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

Syntax

i32x4.extend_high_i16x8_u

• i32x4.extend_high_i16x8_u

  • : The i32x4.extend_high_i16x8_u instruction.

Type

[input] -> [output]

• input

  • : The input v128 i16x8 value interpretation.

  output

  • : The output v128 i32x4 value interpretation.

Binary encoding

InstructionBinary formatExample text => binaryi32x4.extend_high_i16x8_u0xfd 170:u32i32x4.extend_high_i16x8_u => 0xfd 0xaa 0x01

Specifications

Browser compatibility