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Subject: [OASIS Issue Tracker] Commented: (OFFICE-3041) Needs-Discussion:Bit operations, still some ambiguity

    [ http://tools.oasis-open.org/issues/browse/OFFICE-3041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=20050#action_20050 ] 

David Wheeler  commented on OFFICE-3041:

Group agreed that: "The number of bits supported in bit operations is
implementation-defined, but shall be at least 48 bits".

> Needs-Discussion: Bit operations, still some ambiguity
> ------------------------------------------------------
>                 Key: OFFICE-3041
>                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-3041
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Bug
>          Components: OpenFormula
>    Affects Versions: ODF 1.2 CD 05
>            Reporter: Eric Patterson
> As part of the fix in http://tools.oasis-open.org/issues/browse/OFFICE-2327, we've set the minimum to 48 bits, but in doing so, there is still ambiguity when doing shift operations.  If implementations have different maximums, you may get different results when shifting outside the range.  
> Assuming the minimum 48-bit support is provided, then BITLSHIFT(1,48) places the 1 in the 49th bit which is outside of the 48-bit range that's supported.  Is that bit lost (producing 0 as a result), or does that produce an error?

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