diff options
Diffstat (limited to 'SRC/slangt.f')
| -rw-r--r-- | SRC/slangt.f | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/SRC/slangt.f b/SRC/slangt.f index cfbb68e1..55d92cc2 100644 --- a/SRC/slangt.f +++ b/SRC/slangt.f @@ -127,17 +127,17 @@ * .. * .. Local Scalars .. INTEGER I - REAL ANORM, SCALE, SUM + REAL ANORM, SCALE, SUM, TEMP * .. * .. External Functions .. - LOGICAL LSAME - EXTERNAL LSAME + LOGICAL LSAME, SISNAN + EXTERNAL LSAME, SISNAN * .. * .. External Subroutines .. EXTERNAL SLASSQ * .. * .. Intrinsic Functions .. - INTRINSIC ABS, MAX, SQRT + INTRINSIC ABS, SQRT * .. * .. Executable Statements .. * @@ -149,9 +149,12 @@ * ANORM = ABS( D( N ) ) DO 10 I = 1, N - 1 - ANORM = MAX( ANORM, ABS( DL( I ) ) ) - ANORM = MAX( ANORM, ABS( D( I ) ) ) - ANORM = MAX( ANORM, ABS( DU( I ) ) ) + IF( ANORM.LT.ABS( DL( I ) ) .OR. SISNAN( ABS( DL( I ) ) ) ) + $ ANORM = ABS(DL(I)) + IF( ANORM.LT.ABS( D( I ) ) .OR. SISNAN( ABS( D( I ) ) ) ) + $ ANORM = ABS(D(I)) + IF( ANORM.LT.ABS( DU( I ) ) .OR. SISNAN (ABS( DU( I ) ) ) ) + $ ANORM = ABS(DU(I)) 10 CONTINUE ELSE IF( LSAME( NORM, 'O' ) .OR. NORM.EQ.'1' ) THEN * @@ -160,11 +163,12 @@ IF( N.EQ.1 ) THEN ANORM = ABS( D( 1 ) ) ELSE - ANORM = MAX( ABS( D( 1 ) )+ABS( DL( 1 ) ), - $ ABS( D( N ) )+ABS( DU( N-1 ) ) ) + ANORM = ABS( D( 1 ) )+ABS( DL( 1 ) ) + TEMP = ABS( D( N ) )+ABS( DU( N-1 ) ) + IF( ANORM .LT. TEMP .OR. SISNAN( TEMP ) ) ANORM = TEMP DO 20 I = 2, N - 1 - ANORM = MAX( ANORM, ABS( D( I ) )+ABS( DL( I ) )+ - $ ABS( DU( I-1 ) ) ) + TEMP = ABS( D( I ) )+ABS( DL( I ) )+ABS( DU( I-1 ) ) + IF( ANORM .LT. TEMP .OR. SISNAN( TEMP ) ) ANORM = TEMP 20 CONTINUE END IF ELSE IF( LSAME( NORM, 'I' ) ) THEN @@ -174,11 +178,12 @@ IF( N.EQ.1 ) THEN ANORM = ABS( D( 1 ) ) ELSE - ANORM = MAX( ABS( D( 1 ) )+ABS( DU( 1 ) ), - $ ABS( D( N ) )+ABS( DL( N-1 ) ) ) + ANORM = ABS( D( 1 ) )+ABS( DU( 1 ) ) + TEMP = ABS( D( N ) )+ABS( DL( N-1 ) ) + IF( ANORM .LT. TEMP .OR. SISNAN( TEMP ) ) ANORM = TEMP DO 30 I = 2, N - 1 - ANORM = MAX( ANORM, ABS( D( I ) )+ABS( DU( I ) )+ - $ ABS( DL( I-1 ) ) ) + TEMP = ABS( D( I ) )+ABS( DU( I ) )+ABS( DL( I-1 ) ) + IF( ANORM .LT. TEMP .OR. SISNAN( TEMP ) ) ANORM = TEMP 30 CONTINUE END IF ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN |