simd_fn.swift

typealias Vec4 = (Int8, Int8, Int8, Int8)
@inline(__always)
func vecAdd(x: inout ContiguousArray<Vec4>, s: Int8) {
  for i in 0..<x.count {
    x[i].0 &+= s
    x[i].1 &+= s
    x[i].2 &+= s
    x[i].3 &+= s
  }
}

@inline(__always)
func vecAddSIMD(x: inout ContiguousArray<SIMD4<Int8>>, s: Int8) {
  for i in 0..<x.count {
    x[i] &+= s
  }
}