--- rpl/lapack/blas/daxpy.f	2010/12/21 13:51:24	1.6
+++ rpl/lapack/blas/daxpy.f	2018/05/29 07:19:40	1.15
@@ -1,4 +1,99 @@
+*> \brief \b DAXPY
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
+*
+*  Definition:
+*  ===========
+*
+*       SUBROUTINE DAXPY(N,DA,DX,INCX,DY,INCY)
+*
+*       .. Scalar Arguments ..
+*       DOUBLE PRECISION DA
+*       INTEGER INCX,INCY,N
+*       ..
+*       .. Array Arguments ..
+*       DOUBLE PRECISION DX(*),DY(*)
+*       ..
+*
+*
+*> \par Purpose:
+*  =============
+*>
+*> \verbatim
+*>
+*>    DAXPY constant times a vector plus a vector.
+*>    uses unrolled loops for increments equal to one.
+*> \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] DX
+*> \verbatim
+*>          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
+*> \endverbatim
+*>
+*> \param[in] INCX
+*> \verbatim
+*>          INCX is INTEGER
+*>         storage spacing between elements of DX
+*> \endverbatim
+*>
+*> \param[in,out] DY
+*> \verbatim
+*>          DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
+*> \endverbatim
+*>
+*> \param[in] INCY
+*> \verbatim
+*>          INCY is INTEGER
+*>         storage spacing between elements of DY
+*> \endverbatim
+*
+*  Authors:
+*  ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \date November 2017
+*
+*> \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 DAXPY(N,DA,DX,INCX,DY,INCY)
+*
+*  -- Reference BLAS level1 routine (version 3.8.0) --
+*  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
+*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
+*     November 2017
+*
 *     .. Scalar Arguments ..
       DOUBLE PRECISION DA
       INTEGER INCX,INCY,N
@@ -7,18 +102,6 @@
       DOUBLE PRECISION DX(*),DY(*)
 *     ..
 *
-*  Purpose
-*  =======
-*
-*     DAXPY constant times a vector plus a vector.
-*     uses unrolled loops for increments equal to one.
-*
-*  Further Details
-*  ===============
-*
-*     jack dongarra, linpack, 3/11/78.
-*     modified 12/3/93, array(1) declarations changed to array(*)
-*
 *  =====================================================================
 *
 *     .. Local Scalars ..
@@ -29,39 +112,41 @@
 *     ..
       IF (N.LE.0) RETURN
       IF (DA.EQ.0.0d0) RETURN
-      IF (INCX.EQ.1 .AND. INCY.EQ.1) GO TO 20
+      IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
+*
+*        code for both increments equal to 1
+*
+*
+*        clean-up loop
+*
+         M = MOD(N,4)
+         IF (M.NE.0) THEN
+            DO I = 1,M
+               DY(I) = DY(I) + DA*DX(I)
+            END DO
+         END IF
+         IF (N.LT.4) RETURN
+         MP1 = M + 1
+         DO I = MP1,N,4
+            DY(I) = DY(I) + DA*DX(I)
+            DY(I+1) = DY(I+1) + DA*DX(I+1)
+            DY(I+2) = DY(I+2) + DA*DX(I+2)
+            DY(I+3) = DY(I+3) + DA*DX(I+3)
+         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 10 I = 1,N
+         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
           DY(IY) = DY(IY) + DA*DX(IX)
           IX = IX + INCX
           IY = IY + INCY
-   10 CONTINUE
-      RETURN
-*
-*        code for both increments equal to 1
-*
-*
-*        clean-up loop
-*
-   20 M = MOD(N,4)
-      IF (M.EQ.0) GO TO 40
-      DO 30 I = 1,M
-          DY(I) = DY(I) + DA*DX(I)
-   30 CONTINUE
-      IF (N.LT.4) RETURN
-   40 MP1 = M + 1
-      DO 50 I = MP1,N,4
-          DY(I) = DY(I) + DA*DX(I)
-          DY(I+1) = DY(I+1) + DA*DX(I+1)
-          DY(I+2) = DY(I+2) + DA*DX(I+2)
-          DY(I+3) = DY(I+3) + DA*DX(I+3)
-   50 CONTINUE
+         END DO
+      END IF
       RETURN
       END