--- rpl/lapack/blas/zdscal.f	2010/01/26 15:22:45	1.1.1.1
+++ rpl/lapack/blas/zdscal.f	2023/08/07 08:38:44	1.16
@@ -1,48 +1,123 @@
+*> \brief \b ZDSCAL
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
+*
+*  Definition:
+*  ===========
+*
+*       SUBROUTINE ZDSCAL(N,DA,ZX,INCX)
+*
+*       .. Scalar Arguments ..
+*       DOUBLE PRECISION DA
+*       INTEGER INCX,N
+*       ..
+*       .. Array Arguments ..
+*       COMPLEX*16 ZX(*)
+*       ..
+*
+*
+*> \par Purpose:
+*  =============
+*>
+*> \verbatim
+*>
+*>    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:
+*  ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \ingroup complex16_blas_level1
+*
+*> \par Further Details:
+*  =====================
+*>
+*> \verbatim
+*>
+*>     jack dongarra, 3/11/78.
+*>     modified 3/93 to return if incx .le. 0.
+*>     modified 12/3/93, array(1) declarations changed to array(*)
+*> \endverbatim
+*>
+*  =====================================================================
       SUBROUTINE ZDSCAL(N,DA,ZX,INCX)
+*
+*  -- 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..--
+*
 *     .. Scalar Arguments ..
       DOUBLE PRECISION DA
       INTEGER INCX,N
 *     ..
 *     .. Array Arguments ..
-      DOUBLE COMPLEX ZX(*)
+      COMPLEX*16 ZX(*)
 *     ..
 *
-*  Purpose
-*  =======
-*
-*     ZDSCAL scales a vector by a constant.
-*
-*  Further Details
-*  ===============
-*
-*     jack dongarra, 3/11/78.
-*     modified 3/93 to return if incx .le. 0.
-*     modified 12/3/93, array(1) declarations changed to array(*)
-*
 *  =====================================================================
 *
 *     .. Local Scalars ..
-      INTEGER I,IX
+      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 (INCX.EQ.1) GO TO 20
+      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*DBLE(ZX(I)),DA*DIMAG(ZX(I)))
+         END DO
+      ELSE
 *
 *        code for increment not equal to 1
 *
-      IX = 1
-      DO 10 I = 1,N
-          ZX(IX) = DCMPLX(DA,0.0d0)*ZX(IX)
-          IX = IX + INCX
-   10 CONTINUE
+         NINCX = N*INCX
+         DO I = 1,NINCX,INCX
+            ZX(I) = DCMPLX(DA*DBLE(ZX(I)),DA*DIMAG(ZX(I)))
+         END DO
+      END IF
       RETURN
 *
-*        code for increment equal to 1
+*     End of ZDSCAL
 *
-   20 DO 30 I = 1,N
-          ZX(I) = DCMPLX(DA,0.0d0)*ZX(I)
-   30 CONTINUE
-      RETURN
       END