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GECON returns 1 if RCOND is NaN #926

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Nov 11, 2023
Merged

GECON returns 1 if RCOND is NaN #926

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09abbd0
GECON returns 1 if RCOND is NaN
weslleyspereira Nov 2, 2023
68eafc6
Makes NaN an illegal value for ANORM on input of GECON. Let NaNs prop…
weslleyspereira Nov 8, 2023
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13 changes: 11 additions & 2 deletions SRC/cgecon.f
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@
*> INFO is INTEGER
*> = 0: successful exit
*> < 0: if INFO = -i, the i-th argument had an illegal value
*> =-5: if ANORM is NAN or negative.
*> = 1: RCOND = NaN.
*> \endverbatim
*
* Authors:
Expand Down Expand Up @@ -183,7 +183,7 @@ SUBROUTINE CGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
INFO = -2
ELSE IF( LDA.LT.MAX( 1, N ) ) THEN
INFO = -4
ELSE IF( ANORM.LT.ZERO .OR. SISNAN( ANORM ) ) THEN
ELSE IF( ANORM.LT.ZERO ) THEN
INFO = -5
END IF
IF( INFO.NE.0 ) THEN
Expand All @@ -199,6 +199,10 @@ SUBROUTINE CGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
RETURN
ELSE IF( ANORM.EQ.ZERO ) THEN
RETURN
ELSE IF( SISNAN( ANORM ) ) THEN
RCOND = ANORM
INFO = 1
RETURN
END IF
*
SMLNUM = SLAMCH( 'Safe minimum' )
Expand Down Expand Up @@ -258,6 +262,11 @@ SUBROUTINE CGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
*
IF( AINVNM.NE.ZERO )
$ RCOND = ( ONE / AINVNM ) / ANORM
*
* Check for NaNs
*
IF( SISNAN( RCOND ) )
$ INFO = 1
*
20 CONTINUE
RETURN
Expand Down
13 changes: 11 additions & 2 deletions SRC/dgecon.f
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@
*> INFO is INTEGER
*> = 0: successful exit
*> < 0: if INFO = -i, the i-th argument had an illegal value
*> =-5: if ANORM is NAN or negative.
*> = 1: RCOND = NaN.
*> \endverbatim
*
* Authors:
Expand Down Expand Up @@ -176,7 +176,7 @@ SUBROUTINE DGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
INFO = -2
ELSE IF( LDA.LT.MAX( 1, N ) ) THEN
INFO = -4
ELSE IF( ANORM.LT.ZERO .OR. DISNAN( ANORM ) ) THEN
ELSE IF( ANORM.LT.ZERO ) THEN
INFO = -5
END IF
IF( INFO.NE.0 ) THEN
Expand All @@ -192,6 +192,10 @@ SUBROUTINE DGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
RETURN
ELSE IF( ANORM.EQ.ZERO ) THEN
RETURN
ELSE IF( DISNAN( ANORM ) ) THEN
RCOND = ANORM
INFO = 1
RETURN
END IF
*
SMLNUM = DLAMCH( 'Safe minimum' )
Expand Down Expand Up @@ -250,6 +254,11 @@ SUBROUTINE DGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
*
IF( AINVNM.NE.ZERO )
$ RCOND = ( ONE / AINVNM ) / ANORM
*
* Check for NaNs
*
IF( DISNAN( RCOND ) )
$ INFO = 1
*
20 CONTINUE
RETURN
Expand Down
13 changes: 11 additions & 2 deletions SRC/sgecon.f
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@
*> INFO is INTEGER
*> = 0: successful exit
*> < 0: if INFO = -i, the i-th argument had an illegal value
*> =-5: if ANORM is NAN or negative.
*> = 1: RCOND = NaN.
*> \endverbatim
*
* Authors:
Expand Down Expand Up @@ -176,7 +176,7 @@ SUBROUTINE SGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
INFO = -2
ELSE IF( LDA.LT.MAX( 1, N ) ) THEN
INFO = -4
ELSE IF( ANORM.LT.ZERO .OR. SISNAN( ANORM ) ) THEN
ELSE IF( ANORM.LT.ZERO ) THEN
INFO = -5
END IF
IF( INFO.NE.0 ) THEN
Expand All @@ -192,6 +192,10 @@ SUBROUTINE SGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
RETURN
ELSE IF( ANORM.EQ.ZERO ) THEN
RETURN
ELSE IF( SISNAN( ANORM ) ) THEN
RCOND = ANORM
INFO = 1
RETURN
END IF
*
SMLNUM = SLAMCH( 'Safe minimum' )
Expand Down Expand Up @@ -250,6 +254,11 @@ SUBROUTINE SGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK,
*
IF( AINVNM.NE.ZERO )
$ RCOND = ( ONE / AINVNM ) / ANORM
*
* Check for NaNs
*
IF( SISNAN( RCOND ) )
$ INFO = 1
*
20 CONTINUE
RETURN
Expand Down
13 changes: 11 additions & 2 deletions SRC/zgecon.f
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@
*> INFO is INTEGER
*> = 0: successful exit
*> < 0: if INFO = -i, the i-th argument had an illegal value
*> =-5: if ANORM is NAN or negative.
*> = 1: RCOND = NaN.
*> \endverbatim
*
* Authors:
Expand Down Expand Up @@ -183,7 +183,7 @@ SUBROUTINE ZGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
INFO = -2
ELSE IF( LDA.LT.MAX( 1, N ) ) THEN
INFO = -4
ELSE IF( ANORM.LT.ZERO .OR. DISNAN( ANORM ) ) THEN
ELSE IF( ANORM.LT.ZERO ) THEN
INFO = -5
END IF
IF( INFO.NE.0 ) THEN
Expand All @@ -199,6 +199,10 @@ SUBROUTINE ZGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
RETURN
ELSE IF( ANORM.EQ.ZERO ) THEN
RETURN
ELSE IF( DISNAN( ANORM ) ) THEN
RCOND = ANORM
INFO = 1
RETURN
END IF
*
SMLNUM = DLAMCH( 'Safe minimum' )
Expand Down Expand Up @@ -258,6 +262,11 @@ SUBROUTINE ZGECON( NORM, N, A, LDA, ANORM, RCOND, WORK, RWORK,
*
IF( AINVNM.NE.ZERO )
$ RCOND = ( ONE / AINVNM ) / ANORM
*
* Check for NaNs
*
IF( DISNAN( RCOND ) )
$ INFO = 1
*
20 CONTINUE
RETURN
Expand Down