version 1.9, 2012/07/31 11:06:36
|
version 1.13, 2014/01/27 09:28:20
|
Line 1
|
Line 1
|
*> \brief \b DLANSF |
*> \brief \b DLANSF 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 in RFP format. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
Line 115
|
Line 115
|
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date September 2012 |
* |
* |
*> \ingroup doubleOTHERcomputational |
*> \ingroup doubleOTHERcomputational |
* |
* |
Line 209
|
Line 209
|
* ===================================================================== |
* ===================================================================== |
DOUBLE PRECISION FUNCTION DLANSF( NORM, TRANSR, UPLO, N, A, WORK ) |
DOUBLE PRECISION FUNCTION DLANSF( NORM, TRANSR, UPLO, N, A, WORK ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational 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, TRANSR, UPLO |
CHARACTER NORM, TRANSR, UPLO |
Line 230
|
Line 230
|
* .. |
* .. |
* .. Local Scalars .. |
* .. Local Scalars .. |
INTEGER I, J, IFM, ILU, NOE, N1, K, L, LDA |
INTEGER I, J, IFM, ILU, NOE, N1, K, L, LDA |
DOUBLE PRECISION SCALE, S, VALUE, AA |
DOUBLE PRECISION SCALE, S, VALUE, AA, TEMP |
* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
LOGICAL LSAME |
LOGICAL LSAME, DISNAN |
INTEGER IDAMAX |
EXTERNAL LSAME, DISNAN |
EXTERNAL LSAME, IDAMAX |
|
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DLASSQ |
EXTERNAL DLASSQ |
Line 299
|
Line 298
|
* A is n by k |
* A is n by k |
DO J = 0, K - 1 |
DO J = 0, K - 1 |
DO I = 0, N - 1 |
DO I = 0, N - 1 |
VALUE = MAX( VALUE, ABS( A( I+J*LDA ) ) ) |
TEMP = ABS( A( I+J*LDA ) ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
END DO |
END DO |
END DO |
END DO |
ELSE |
ELSE |
* xpose case; A is k by n |
* xpose case; A is k by n |
DO J = 0, N - 1 |
DO J = 0, N - 1 |
DO I = 0, K - 1 |
DO I = 0, K - 1 |
VALUE = MAX( VALUE, ABS( A( I+J*LDA ) ) ) |
TEMP = ABS( A( I+J*LDA ) ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
END DO |
END DO |
END DO |
END DO |
END IF |
END IF |
Line 316
|
Line 319
|
* A is n+1 by k |
* A is n+1 by k |
DO J = 0, K - 1 |
DO J = 0, K - 1 |
DO I = 0, N |
DO I = 0, N |
VALUE = MAX( VALUE, ABS( A( I+J*LDA ) ) ) |
TEMP = ABS( A( I+J*LDA ) ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
END DO |
END DO |
END DO |
END DO |
ELSE |
ELSE |
* xpose case; A is k by n+1 |
* xpose case; A is k by n+1 |
DO J = 0, N |
DO J = 0, N |
DO I = 0, K - 1 |
DO I = 0, K - 1 |
VALUE = MAX( VALUE, ABS( A( I+J*LDA ) ) ) |
TEMP = ABS( A( I+J*LDA ) ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
END DO |
END DO |
END DO |
END DO |
END IF |
END IF |
Line 369
|
Line 376
|
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
10 CONTINUE |
10 CONTINUE |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
ELSE |
ELSE |
* ilu = 1 |
* ilu = 1 |
K = K + 1 |
K = K + 1 |
Line 407
|
Line 418
|
END DO |
END DO |
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
END IF |
END IF |
ELSE |
ELSE |
* n is even |
* n is even |
Line 441
|
Line 456
|
END DO |
END DO |
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
ELSE |
ELSE |
* ilu = 1 |
* ilu = 1 |
DO I = K, N - 1 |
DO I = K, N - 1 |
Line 475
|
Line 494
|
END DO |
END DO |
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
END IF |
END IF |
END IF |
END IF |
ELSE |
ELSE |
Line 537
|
Line 560
|
END DO |
END DO |
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
ELSE |
ELSE |
* ilu=1 |
* ilu=1 |
K = K + 1 |
K = K + 1 |
Line 598
|
Line 625
|
END DO |
END DO |
WORK( J ) = WORK( J ) + S |
WORK( J ) = WORK( J ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
END IF |
END IF |
ELSE |
ELSE |
* n is even |
* n is even |
Line 667
|
Line 698
|
* A(k-1,k-1) |
* A(k-1,k-1) |
S = S + AA |
S = S + AA |
WORK( I ) = WORK( I ) + S |
WORK( I ) = WORK( I ) + S |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
ELSE |
ELSE |
* ilu=1 |
* ilu=1 |
DO I = K, N - 1 |
DO I = K, N - 1 |
Line 736
|
Line 771
|
END DO |
END DO |
WORK( J-1 ) = WORK( J-1 ) + S |
WORK( J-1 ) = WORK( J-1 ) + S |
END DO |
END DO |
I = IDAMAX( N, WORK, 1 ) |
VALUE = WORK( 0 ) |
VALUE = WORK( I-1 ) |
DO I = 1, N-1 |
|
TEMP = WORK( I ) |
|
IF( VALUE .LT. TEMP .OR. DISNAN( TEMP ) ) |
|
$ VALUE = TEMP |
|
END DO |
END IF |
END IF |
END IF |
END IF |
END IF |
END IF |