simd_add(_:_:) Returns the sum of two quaternions. Declarationfunc simd_add(_ p: simd_quatd, _ q: simd_quatd) -> simd_quatd See AlsoApplying arithmetic operations to quaternionssimd_mul(_:_:)simd_mul(_:_:)simd_mul(_:_:)simd_sub(_:_:)exp(_:)log(_:)