--- rpl/lapack/blas/dswap.f	2010/12/21 13:51:25	1.6
+++ rpl/lapack/blas/dswap.f	2014/01/27 09:28:13	1.11
@@ -1,4 +1,61 @@
+*> \brief \b DSWAP
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at 
+*            http://www.netlib.org/lapack/explore-html/ 
+*
+*  Definition:
+*  ===========
+*
+*       SUBROUTINE DSWAP(N,DX,INCX,DY,INCY)
+* 
+*       .. Scalar Arguments ..
+*       INTEGER INCX,INCY,N
+*       ..
+*       .. Array Arguments ..
+*       DOUBLE PRECISION DX(*),DY(*)
+*       ..
+*  
+*
+*> \par Purpose:
+*  =============
+*>
+*> \verbatim
+*>
+*>    interchanges two vectors.
+*>    uses unrolled loops for increments equal one.
+*> \endverbatim
+*
+*  Authors:
+*  ========
+*
+*> \author Univ. of Tennessee 
+*> \author Univ. of California Berkeley 
+*> \author Univ. of Colorado Denver 
+*> \author NAG Ltd. 
+*
+*> \date November 2011
+*
+*> \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 DSWAP(N,DX,INCX,DY,INCY)
+*
+*  -- Reference BLAS level1 routine (version 3.4.0) --
+*  -- 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 ..
       INTEGER INCX,INCY,N
 *     ..
@@ -6,18 +63,6 @@
       DOUBLE PRECISION DX(*),DY(*)
 *     ..
 *
-*  Purpose
-*  =======
-*
-*     interchanges two vectors.
-*     uses unrolled loops for increments equal one.
-*
-*  Further Details
-*  ===============
-*
-*     jack dongarra, linpack, 3/11/78.
-*     modified 12/3/93, array(1) declarations changed to array(*)
-*
 *  =====================================================================
 *
 *     .. Local Scalars ..
@@ -28,48 +73,50 @@
       INTRINSIC MOD
 *     ..
       IF (N.LE.0) RETURN
-      IF (INCX.EQ.1 .AND. INCY.EQ.1) GO TO 20
-*
-*       code for unequal increments or equal increments not 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 = DX(IX)
-          DX(IX) = DY(IY)
-          DY(IY) = DTEMP
-          IX = IX + INCX
-          IY = IY + INCY
-   10 CONTINUE
-      RETURN
+      IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
 *
 *       code for both increments equal to 1
 *
 *
 *       clean-up loop
 *
-   20 M = MOD(N,3)
-      IF (M.EQ.0) GO TO 40
-      DO 30 I = 1,M
-          DTEMP = DX(I)
-          DX(I) = DY(I)
-          DY(I) = DTEMP
-   30 CONTINUE
-      IF (N.LT.3) RETURN
-   40 MP1 = M + 1
-      DO 50 I = MP1,N,3
-          DTEMP = DX(I)
-          DX(I) = DY(I)
-          DY(I) = DTEMP
-          DTEMP = DX(I+1)
-          DX(I+1) = DY(I+1)
-          DY(I+1) = DTEMP
-          DTEMP = DX(I+2)
-          DX(I+2) = DY(I+2)
-          DY(I+2) = DTEMP
-   50 CONTINUE
+         M = MOD(N,3)
+         IF (M.NE.0) THEN
+            DO I = 1,M
+               DTEMP = DX(I)
+               DX(I) = DY(I)
+               DY(I) = DTEMP
+            END DO
+            IF (N.LT.3) RETURN
+         END IF
+         MP1 = M + 1
+         DO I = MP1,N,3
+            DTEMP = DX(I)
+            DX(I) = DY(I)
+            DY(I) = DTEMP
+            DTEMP = DX(I+1)
+            DX(I+1) = DY(I+1)
+            DY(I+1) = DTEMP
+            DTEMP = DX(I+2)
+            DX(I+2) = DY(I+2)
+            DY(I+2) = DTEMP
+         END DO
+      ELSE
+*
+*       code for unequal increments or equal increments not 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 I = 1,N
+            DTEMP = DX(IX)
+            DX(IX) = DY(IY)
+            DY(IY) = DTEMP
+            IX = IX + INCX
+            IY = IY + INCY
+         END DO
+      END IF
       RETURN
       END