--- rpl/lapack/blas/zdscal.f 2017/06/17 10:53:45 1.13 +++ rpl/lapack/blas/zdscal.f 2023/08/07 08:38:44 1.16 @@ -27,6 +27,32 @@ *> ZDSCAL scales a vector by a constant. *> \endverbatim * +* Arguments: +* ========== +* +*> \param[in] N +*> \verbatim +*> N is INTEGER +*> number of elements in input vector(s) +*> \endverbatim +*> +*> \param[in] DA +*> \verbatim +*> DA is DOUBLE PRECISION +*> On entry, DA specifies the scalar alpha. +*> \endverbatim +*> +*> \param[in,out] ZX +*> \verbatim +*> ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) ) +*> \endverbatim +*> +*> \param[in] INCX +*> \verbatim +*> INCX is INTEGER +*> storage spacing between elements of ZX +*> \endverbatim +* * Authors: * ======== * @@ -35,8 +61,6 @@ *> \author Univ. of Colorado Denver *> \author NAG Ltd. * -*> \date December 2016 -* *> \ingroup complex16_blas_level1 * *> \par Further Details: @@ -52,10 +76,9 @@ * ===================================================================== SUBROUTINE ZDSCAL(N,DA,ZX,INCX) * -* -- Reference BLAS level1 routine (version 3.7.0) -- +* -- Reference BLAS level1 routine -- * -- Reference BLAS is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- -* December 2016 * * .. Scalar Arguments .. DOUBLE PRECISION DA @@ -69,17 +92,20 @@ * * .. Local Scalars .. INTEGER I,NINCX +* .. Parameters .. + DOUBLE PRECISION ONE + PARAMETER (ONE=1.0D+0) * .. * .. Intrinsic Functions .. - INTRINSIC DCMPLX + INTRINSIC DBLE, DCMPLX, DIMAG * .. - IF (N.LE.0 .OR. INCX.LE.0) RETURN + IF (N.LE.0 .OR. INCX.LE.0 .OR. DA.EQ.ONE) RETURN IF (INCX.EQ.1) THEN * * code for increment equal to 1 * DO I = 1,N - ZX(I) = DCMPLX(DA,0.0d0)*ZX(I) + ZX(I) = DCMPLX(DA*DBLE(ZX(I)),DA*DIMAG(ZX(I))) END DO ELSE * @@ -87,8 +113,11 @@ * NINCX = N*INCX DO I = 1,NINCX,INCX - ZX(I) = DCMPLX(DA,0.0d0)*ZX(I) + ZX(I) = DCMPLX(DA*DBLE(ZX(I)),DA*DIMAG(ZX(I))) END DO END IF RETURN +* +* End of ZDSCAL +* END