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[xacml] SH03: handling of divide-by-zero

From: System <[email protected]>
To: [email protected]
Date: Wed, 16 Oct 2002 14:53:00 -0000

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Subject: [xacml] SH03: handling of divide-by-zero




From: Steve Hanna <[email protected]>
To: XACML TC <[email protected]>
Date: Wed, 16 Oct 2002 14:45:48 -0400






Section A.12 Arithmetic evaluation says that trap-enablers
SHALL all be set to 0. I believe that this means that a
division by zero will produce a result of positive or
negative infinity and proceed along happily. That seems
surprising and contradicts sections 6.11 and B.9, which
imply that a division by zero will produce an indeterminate
result.

I suggest that you change section A.12 to say that all
trap-enablers SHALL be set to 0 except division-by-zero,
which SHALL be set to 1. Then you can change the description
of the integer-divide and decimal-divide functions in
section A.13.2 to say that they SHALL produce a result
of indeterminate with a processing-error status if the
divisor is 0.

Thanks,

Steve Hanna
Sun Microsystems, Inc.













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