sign(_:) Returns the sign of each element in a vector. Declarationfunc sign(_ x: SIMD4<Double>) -> SIMD4<Double> See AlsoCommon Functionssimd_abs(_:)abs(_:)simd_clamp(_:_:_:)clamp(_:min:max:)clamp(_:min:max:)simd_fract(_:)fract(_:)simd_equal(_:_:)simd_sign(_:)simd_step(_:_:)step(_:edge:)