--- rpl/lapack/blas/zscal.f	2012/12/14 14:22:04	1.10
+++ rpl/lapack/blas/zscal.f	2023/08/07 08:38:46	1.16
@@ -2,14 +2,14 @@
 *
 *  =========== DOCUMENTATION ===========
 *
-* Online html documentation available at 
-*            http://www.netlib.org/lapack/explore-html/ 
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
 *
 *  Definition:
 *  ===========
 *
 *       SUBROUTINE ZSCAL(N,ZA,ZX,INCX)
-* 
+*
 *       .. Scalar Arguments ..
 *       COMPLEX*16 ZA
 *       INTEGER INCX,N
@@ -17,7 +17,7 @@
 *       .. Array Arguments ..
 *       COMPLEX*16 ZX(*)
 *       ..
-*  
+*
 *
 *> \par Purpose:
 *  =============
@@ -27,15 +27,39 @@
 *>    ZSCAL 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] ZA
+*> \verbatim
+*>          ZA is COMPLEX*16
+*>           On entry, ZA 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. 
-*
-*> \date November 2011
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
 *
 *> \ingroup complex16_blas_level1
 *
@@ -52,10 +76,9 @@
 *  =====================================================================
       SUBROUTINE ZSCAL(N,ZA,ZX,INCX)
 *
-*  -- Reference BLAS level1 routine (version 3.4.0) --
+*  -- 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..--
-*     November 2011
 *
 *     .. Scalar Arguments ..
       COMPLEX*16 ZA
@@ -70,7 +93,11 @@
 *     .. Local Scalars ..
       INTEGER I,NINCX
 *     ..
-      IF (N.LE.0 .OR. INCX.LE.0) RETURN
+*     .. Parameters ..
+      COMPLEX*16 ONE
+      PARAMETER (ONE= (1.0D+0,0.0D+0))
+*     ..
+      IF (N.LE.0 .OR. INCX.LE.0 .OR. ZA.EQ.ONE) RETURN
       IF (INCX.EQ.1) THEN
 *
 *        code for increment equal to 1
@@ -88,4 +115,7 @@
          END DO
       END IF
       RETURN
+*
+*     End of ZSCAL
+*
       END