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Article #283Question on bitfield implementation...
From: Dale Wade
Date: Fri, 28 Aug 1992 15:51
Date: Fri, 28 Aug 1992 15:51
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1531 bytes
Sir or Madam, I am using gcc version 1.37.1, targeting the Motrola 68020 architecture. I found this email address while searching through the "Using and Porting GNU CC" document for the info that I need. What I am looking for is information on how bitfields within a structure are implemented in gcc (when compiling for the above architecture). i.e. Can one be assured that bitfields assigned from the top to the bottom of the structure are packed LSB to MSB (or perhaps the reverse)? Is there any word or byte aligning that takes place? Any padding? And can one always count on these rules (the rules that hopefully you will be able to give me)? Thank you in advance for any help that you can offer. Sincerely, -Dale Wade +------------------------------------------------------------------------------+ | Dale Wade | email: dale@heurikon.com | | Software Customer Support | voice: (800) 327-1251 | | Heurikon Corporation | (608) 831-5500 | +------------------------------------------------------------------------------+
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Newsgroups: gnu.gcc.help Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!heurikon.UUCP!dale From: dale@heurikon.UUCP (Dale Wade) Subject: Question on bitfield implementation... Message-ID: <9208281551.AA00869@frodo.heurikon.com.noname> Sender: daemon@cis.ohio-state.edu Organization: GNUs Not Usenet Distribution: gnu Date: Fri, 28 Aug 1992 15:51:11 GMT Lines: 26