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Prevent csrscl/zdrscl from going to infinite loop on Infinity input #1158

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Prevent csrscl/zdrscl from going to infinite loop on Infinity input #1158

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6 changes: 6 additions & 0 deletions SRC/csrscl.f
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Original file line number Diff line number Diff line change
Expand Up @@ -112,13 +112,19 @@ SUBROUTINE CSRSCL( N, SA, SX, INCX )
* ..
* .. Intrinsic Functions ..
INTRINSIC ABS
INTRINSIC HUGE
* ..
* .. Executable Statements ..
*
* Quick return if possible
*
IF( N.LE.0 )
$ RETURN
*
IF( SA.GT.HUGE(SA) .OR. SA.LT.-HUGE(SA) ) THEN
CALL CSSCAL( N, SA, SX, INCX )
RETURN
END IF
*
* Get machine parameters
*
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6 changes: 6 additions & 0 deletions SRC/zdrscl.f
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Original file line number Diff line number Diff line change
Expand Up @@ -112,13 +112,19 @@ SUBROUTINE ZDRSCL( N, SA, SX, INCX )
* ..
* .. Intrinsic Functions ..
INTRINSIC ABS
INTRINSIC HUGE
* ..
* .. Executable Statements ..
*
* Quick return if possible
*
IF( N.LE.0 )
$ RETURN
*
IF( SA.GT.HUGE(SA) .OR. SA.LT.-HUGE(SA) ) THEN
CALL ZDSCAL( N, SA, SX, INCX )
RETURN
END IF
*
* Get machine parameters
*
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