The convert_low_i32x4_s SIMD conversion instruction converts the first two lanes of a signed v128 i32x4 value interpretation into an f64x2 value interpretation.

(module
  (import "console" "log" (func $log (param f64)))
  (func $main
    v128.const i32x4 0x3 0x3a 0xa9 0xff

    f64x2.convert_low_i32x4_s
    f64x2.extract_lane 1
    call $log ;; log the result
  )
  (start $main)
)

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

Syntax

value_type.convert_low_i32x4_s

• value_type

  • : The type of value the instruction is being run on. The following v128 value interpretations support convert_low_i32x4_s:

    • f64x2

  convert_low_i32x4_s

  • : The convert_low_i32x4_s instruction. Must always be included after the value_type and a period (.).

Type

[input] -> [output]

• input

  • : The input v128 i32x4 value interpretation.

  output

  • : The output v128 f64x2 value interpretation. The first two values of the input i32x4 are included in the output f64x2.

Binary encoding

InstructionBinary formatExample text => binaryf64x2.convert_low_i32x4_s0xfd 254:u32f64x2.convert_low_i32x4_s => 0xfd 0xfe 0x01

Specifications

Browser compatibility