The extend_low_i32x4_s SIMD conversion instruction converts lanes 0–1 of a signed v128 i32x4 value interpretation into an i64x2 value interpretation.

(module
  (import "console" "log" (func $log (param i64)))
  (func $main
    v128.const i32x4 2090 2091 2092 2093

    i64x2.extend_low_i32x4_s
    i64x2.extract_lane 0
    call $log ;; log the result
  )
  (start $main)
)

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

Syntax

i64x2.extend_low_i32x4_s

• i64x2.extend_low_i32x4_s

  • : The i64x2.extend_low_i32x4_s instruction.

Type

[input] -> [output]

• input

  • : The input v128 i32x4 value interpretation.

  output

  • : The output v128 i64x2 value interpretation.

Binary encoding

InstructionBinary formatExample text => binaryi64x2.extend_low_i32x4_s0xfd 199:u32i64x2.extend_low_i32x4_s => 0xfd 0xc7 0x01

Specifications

Browser compatibility