version 1.11, 2014/01/27 09:28:12
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version 1.12, 2015/11/26 11:44:14
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date November 2015 |
* |
* |
*> \ingroup double_blas_level2 |
*> \ingroup double_blas_level2 |
* |
* |
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* ===================================================================== |
* ===================================================================== |
SUBROUTINE DGBMV(TRANS,M,N,KL,KU,ALPHA,A,LDA,X,INCX,BETA,Y,INCY) |
SUBROUTINE DGBMV(TRANS,M,N,KL,KU,ALPHA,A,LDA,X,INCX,BETA,Y,INCY) |
* |
* |
* -- Reference BLAS level2 routine (version 3.4.0) -- |
* -- Reference BLAS level2 routine (version 3.6.0) -- |
* -- Reference BLAS is a software package provided by Univ. of Tennessee, -- |
* -- Reference BLAS is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2011 |
* November 2015 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
DOUBLE PRECISION ALPHA,BETA |
DOUBLE PRECISION ALPHA,BETA |
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JX = KX |
JX = KX |
IF (INCY.EQ.1) THEN |
IF (INCY.EQ.1) THEN |
DO 60 J = 1,N |
DO 60 J = 1,N |
IF (X(JX).NE.ZERO) THEN |
TEMP = ALPHA*X(JX) |
TEMP = ALPHA*X(JX) |
K = KUP1 - J |
K = KUP1 - J |
DO 50 I = MAX(1,J-KU),MIN(M,J+KL) |
DO 50 I = MAX(1,J-KU),MIN(M,J+KL) |
Y(I) = Y(I) + TEMP*A(K+I,J) |
Y(I) = Y(I) + TEMP*A(K+I,J) |
50 CONTINUE |
50 CONTINUE |
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END IF |
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JX = JX + INCX |
JX = JX + INCX |
60 CONTINUE |
60 CONTINUE |
ELSE |
ELSE |
DO 80 J = 1,N |
DO 80 J = 1,N |
IF (X(JX).NE.ZERO) THEN |
TEMP = ALPHA*X(JX) |
TEMP = ALPHA*X(JX) |
IY = KY |
IY = KY |
K = KUP1 - J |
K = KUP1 - J |
DO 70 I = MAX(1,J-KU),MIN(M,J+KL) |
DO 70 I = MAX(1,J-KU),MIN(M,J+KL) |
Y(IY) = Y(IY) + TEMP*A(K+I,J) |
Y(IY) = Y(IY) + TEMP*A(K+I,J) |
IY = IY + INCY |
IY = IY + INCY |
70 CONTINUE |
70 CONTINUE |
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END IF |
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JX = JX + INCX |
JX = JX + INCX |
IF (J.GT.KU) KY = KY + INCY |
IF (J.GT.KU) KY = KY + INCY |
80 CONTINUE |
80 CONTINUE |