--- rpl/lapack/blas/drot.f	2010/08/13 21:03:39	1.5
+++ rpl/lapack/blas/drot.f	2017/06/17 10:53:43	1.13
@@ -1,4 +1,61 @@
+*> \brief \b DROT
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
+*
+*  Definition:
+*  ===========
+*
+*       SUBROUTINE DROT(N,DX,INCX,DY,INCY,C,S)
+*
+*       .. Scalar Arguments ..
+*       DOUBLE PRECISION C,S
+*       INTEGER INCX,INCY,N
+*       ..
+*       .. Array Arguments ..
+*       DOUBLE PRECISION DX(*),DY(*)
+*       ..
+*
+*
+*> \par Purpose:
+*  =============
+*>
+*> \verbatim
+*>
+*>    DROT applies a plane rotation.
+*> \endverbatim
+*
+*  Authors:
+*  ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \date December 2016
+*
+*> \ingroup double_blas_level1
+*
+*> \par Further Details:
+*  =====================
+*>
+*> \verbatim
+*>
+*>     jack dongarra, linpack, 3/11/78.
+*>     modified 12/3/93, array(1) declarations changed to array(*)
+*> \endverbatim
+*>
+*  =====================================================================
       SUBROUTINE DROT(N,DX,INCX,DY,INCY,C,S)
+*
+*  -- Reference BLAS level1 routine (version 3.7.0) --
+*  -- 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 C,S
       INTEGER INCX,INCY,N
@@ -7,17 +64,6 @@
       DOUBLE PRECISION DX(*),DY(*)
 *     ..
 *
-*  Purpose
-*  =======
-*
-*     DROT applies a plane rotation.
-*
-*  Further Details
-*  ===============
-*
-*     jack dongarra, linpack, 3/11/78.
-*     modified 12/3/93, array(1) declarations changed to array(*)
-*
 *  =====================================================================
 *
 *     .. Local Scalars ..
@@ -25,30 +71,31 @@
       INTEGER I,IX,IY
 *     ..
       IF (N.LE.0) RETURN
-      IF (INCX.EQ.1 .AND. INCY.EQ.1) GO TO 20
+      IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
 *
-*       code for unequal increments or equal increments not equal
-*         to 1
+*       code for both increments equal to 1
 *
-      IX = 1
-      IY = 1
-      IF (INCX.LT.0) IX = (-N+1)*INCX + 1
-      IF (INCY.LT.0) IY = (-N+1)*INCY + 1
-      DO 10 I = 1,N
-          DTEMP = C*DX(IX) + S*DY(IY)
-          DY(IY) = C*DY(IY) - S*DX(IX)
-          DX(IX) = DTEMP
-          IX = IX + INCX
-          IY = IY + INCY
-   10 CONTINUE
-      RETURN
+         DO I = 1,N
+            DTEMP = C*DX(I) + S*DY(I)
+            DY(I) = C*DY(I) - S*DX(I)
+            DX(I) = DTEMP
+         END DO
+      ELSE
 *
-*       code for both increments equal to 1
+*       code for unequal increments or equal increments not equal
+*         to 1
 *
-   20 DO 30 I = 1,N
-          DTEMP = C*DX(I) + S*DY(I)
-          DY(I) = C*DY(I) - S*DX(I)
-          DX(I) = DTEMP
-   30 CONTINUE
+         IX = 1
+         IY = 1
+         IF (INCX.LT.0) IX = (-N+1)*INCX + 1
+         IF (INCY.LT.0) IY = (-N+1)*INCY + 1
+         DO I = 1,N
+            DTEMP = C*DX(IX) + S*DY(IY)
+            DY(IY) = C*DY(IY) - S*DX(IX)
+            DX(IX) = DTEMP
+            IX = IX + INCX
+            IY = IY + INCY
+         END DO
+      END IF
       RETURN
       END