version 1.8, 2011/11/21 20:42:56
|
version 1.12, 2012/12/14 14:22:33
|
Line 1
|
Line 1
|
*> \brief \b DLANSP |
*> \brief \b DLANSP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric matrix supplied in packed form. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
Line 107
|
Line 107
|
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date September 2012 |
* |
* |
*> \ingroup doubleOTHERauxiliary |
*> \ingroup doubleOTHERauxiliary |
* |
* |
* ===================================================================== |
* ===================================================================== |
DOUBLE PRECISION FUNCTION DLANSP( NORM, UPLO, N, AP, WORK ) |
DOUBLE PRECISION FUNCTION DLANSP( NORM, UPLO, N, AP, WORK ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.4.2) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK 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 |
* September 2012 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER NORM, UPLO |
CHARACTER NORM, UPLO |
Line 141
|
Line 141
|
EXTERNAL DLASSQ |
EXTERNAL DLASSQ |
* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
LOGICAL LSAME |
LOGICAL LSAME, DISNAN |
EXTERNAL LSAME |
EXTERNAL LSAME, DISNAN |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC ABS, MAX, SQRT |
INTRINSIC ABS, SQRT |
* .. |
* .. |
* .. Executable Statements .. |
* .. Executable Statements .. |
* |
* |
Line 160
|
Line 160
|
K = 1 |
K = 1 |
DO 20 J = 1, N |
DO 20 J = 1, N |
DO 10 I = K, K + J - 1 |
DO 10 I = K, K + J - 1 |
VALUE = MAX( VALUE, ABS( AP( I ) ) ) |
SUM = ABS( AP( I ) ) |
|
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
10 CONTINUE |
10 CONTINUE |
K = K + J |
K = K + J |
20 CONTINUE |
20 CONTINUE |
Line 168
|
Line 169
|
K = 1 |
K = 1 |
DO 40 J = 1, N |
DO 40 J = 1, N |
DO 30 I = K, K + N - J |
DO 30 I = K, K + N - J |
VALUE = MAX( VALUE, ABS( AP( I ) ) ) |
SUM = ABS( AP( I ) ) |
|
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
30 CONTINUE |
30 CONTINUE |
K = K + N - J + 1 |
K = K + N - J + 1 |
40 CONTINUE |
40 CONTINUE |
Line 193
|
Line 195
|
K = K + 1 |
K = K + 1 |
60 CONTINUE |
60 CONTINUE |
DO 70 I = 1, N |
DO 70 I = 1, N |
VALUE = MAX( VALUE, WORK( I ) ) |
SUM = WORK( I ) |
|
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
70 CONTINUE |
70 CONTINUE |
ELSE |
ELSE |
DO 80 I = 1, N |
DO 80 I = 1, N |
Line 208
|
Line 211
|
WORK( I ) = WORK( I ) + ABSA |
WORK( I ) = WORK( I ) + ABSA |
K = K + 1 |
K = K + 1 |
90 CONTINUE |
90 CONTINUE |
VALUE = MAX( VALUE, SUM ) |
IF( VALUE .LT. SUM .OR. DISNAN( SUM ) ) VALUE = SUM |
100 CONTINUE |
100 CONTINUE |
END IF |
END IF |
ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN |
ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN |