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Re: (len % 1) != 0

From: Andreas Schwab <schwab at suse dot de>
To: "Dave Korn" <dave dot korn at artimi dot com>
Cc: "'Sheng-Liang Song'" <ssl at baymicrosystems dot com>, "'Bin Chen'" <binary dot chen at gmail dot com>, "'Eli Zaretskii'" <eliz at gnu dot org>, <gdb at sourceware dot org>
Date: Tue, 19 Feb 2008 21:47:27 +0100
Subject: Re: (len % 1) != 0
References: <5800c1cc0802162157g3ac31acas4ae95585b9b2e263@mail.gmail.com> <E1JQkG0-0005DD-0k@fencepost.gnu.org> <5800c1cc0802170641g68ab2e5fte724cd076412333@mail.gmail.com> <20080217152625.GA4810@caradoc.them.org> <47BB03ED.5060708@baymicrosystems.com> <007f01c87324$00f45a90$2e08a8c0@CAM.ARTIMI.COM>

"Dave Korn" <dave.korn@artimi.com> writes:

> On 19 February 2008 16:30, Sheng-Liang Song wrote:
>
>> or
>> 
>>  (len  & 1) != 0   <=>  (len % 2) != 0
>> 
>
>   That would have the advantage of not requiring a divide operation :)

The divide operation is already required and can be combined with the
modulo operation.

And this is by no means performance critical.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"Premature optimization is the root of all evil."

References:
- (len % 1) != 0
  - From: Bin Chen
- Re: (len % 1) != 0
  - From: Eli Zaretskii
- Re: (len % 1) != 0
  - From: Bin Chen
- Re: (len % 1) != 0
  - From: Daniel Jacobowitz
- Re: (len % 1) != 0
  - From: Sheng-Liang Song
- RE: (len % 1) != 0
  - From: Dave Korn

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