extadd_pairwise_i16x8_u: Wasm SIMD arithmetic instruction

The extadd_pairwise_i16x8_u SIMD arithmetic instruction adds each adjacent pair of lanes of an unsigned v128 i16x8 value interpretation, outputting the results into an i32x4 value interpretation.

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (func $main
    v128.const i16x8 20 40 20 40 20 40 20 40

    i32x4.extadd_pairwise_i16x8_u
    i32x4.extract_lane 3
    call $log ;; log the result
  )
  (start $main)
)

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

In the above example, each adjacent pair of lanes contains the values 20 and 40. The extadd_pairwise_i16x8_u instruction adds each pair together, resulting in the 4 lanes of the output i32x4 value all containing the value 60.

Syntax

i32x4.extadd_pairwise_i16x8_u

i32x4.extadd_pairwise_i16x8_u

The i32x4.extadd_pairwise_i16x8_u instruction.

Type

[input] -> [output]

input

The input v128 i16x8 value interpretation.

output

The output v128 i32x4 value interpretation.

Binary encoding

Specifications

• WebAssembly Core Specification