init(lowHalf:highHalf:)
A vector formed by concatenating lowHalf and highHalf.
Declaration
init(lowHalf: SIMD4<UInt64>, highHalf: SIMD4<UInt64>)Discussion
Equivalent to:
var result = SIMD8<UInt64>()
for i in 0..<4 {
result[i] = lowHalf[i]
result[4+i] = highHalf[i]
}