Article View: comp.os.msdos.programmer
Article #2871Re: TC++ bugs reported to Borland
From: Ralf.Brown
Date: Tue, 30 Oct 1990 12:32
Date: Tue, 30 Oct 1990 12:32
20 lines
1296 bytes
1296 bytes
In article <16797@shlump.nac.dec.com>, routley@tle.enet.dec.com wrote:
} 1. Bitfield Operation Performance
}
} The third bit in a multi-bit bitfield structure is
} testing by performing a pair of shift instructions,
} requiring 25 cycles:
}
} MOV AX, WORD PTR [BP-06]
} SHR AX, 1
} SHR AX, 1
} TEST AX, 0001
I just checked, and TC 2.00 does the same thing.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!seismo!dimacs.rutgers.edu!mips!zaphod.mps.ohio-state.edu!usc!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!b.gp.cs.cmu.edu!Ralf.Brown@B.GP.CS.CMU.EDU From: Ralf.Brown@B.GP.CS.CMU.EDU Newsgroups: comp.os.msdos.programmer Subject: Re: TC++ bugs reported to Borland Message-ID: <272d8101@ralf> Date: 30 Oct 90 12:32:49 GMT Sender: ralf@b.gp.cs.cmu.edu Organization: Carnegie Mellon University School of Computer Science Lines: 20 In-Reply-To: <16797@shlump.nac.dec.com>