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Re: Why would one use += 1 at the place of ++?

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On 05/19/2011 06:40 AM, David Lamb wrote:
> On 19/05/2011 3:19 AM, Merciadri Luca wrote:
>> I've heard that it is generally better to use += 1 at the place of ++.
>> For me,
>> they do exactly the same thing, maybe except that the former is
>> actually splitted into different atomic operations, when the latter
>> might be done in an atomic operation?
>
> I think ++ exists only because the hardware on which C was developed had
> an addressing mode that did it atomically in the very special case of
> referring to
> something = array[index++];
> I have no idea what goes on with the Java byte code specifically

<http://madbean.com/2003/mb2003-44/>

(ie
> whether ++ is defined to be atomic) but any decent optimizer ought to
> treat x++ and x +=1 each in whatever way is optimal.

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Why would one use += 1 at the place of ++? Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-05-19 09:19 +0200
  Re: Why would one use += 1 at the place of ++? Bent C Dalager <bcd@pvv.ntnu.no> - 2011-05-19 10:22 +0000
  Re: Why would one use += 1 at the place of ++? David Lamb <dalamb@cs.queensu.ca> - 2011-05-19 06:40 -0400
    Re: Why would one use += 1 at the place of ++? Jeff Higgins <jeff@invalid.invalid> - 2011-05-19 07:58 -0400
    [OT] Re: Why would one use += 1 at the place of ++? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-19 08:03 -0400
      Re: [OT] Re: Why would one use += 1 at the place of ++? Patricia Shanahan <pats@acm.org> - 2011-05-19 07:35 -0700
        Re: [OT] Re: Why would one use += 1 at the place of ++? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-19 22:57 -0400
          Re: [OT] Re: Why would one use += 1 at the place of ++? rossum <rossum48@coldmail.com> - 2011-05-20 11:00 +0100
          Re: [OT] Re: Why would one use += 1 at the place of ++? Patricia Shanahan <pats@acm.org> - 2011-05-20 12:55 -0700
      Re: [OT] Re: Why would one use += 1 at the place of ++? David Lamb <dalamb@cs.queensu.ca> - 2011-05-19 17:58 -0400
        Re: [OT] Re: Why would one use += 1 at the place of ++? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-19 23:13 -0400
    Re: Why would one use += 1 at the place of ++? Lew <noone@lewscanon.com> - 2011-05-19 08:43 -0400
  Re: Why would one use += 1 at the place of ++? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-19 07:51 -0400
  Re: Why would one use += 1 at the place of ++? Jeff Higgins <jeff@invalid.invalid> - 2011-05-19 08:03 -0400
    Re: Why would one use += 1 at the place of ++? Lew <noone@lewscanon.com> - 2011-05-19 08:08 -0400
  Re: Why would one use += 1 at the place of ++? Roedy Green <see_website@mindprod.com.invalid> - 2011-05-19 10:23 -0700
    Re: Why would one use += 1 at the place of ++? Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-05-19 21:15 +0200
      Re: Why would one use += 1 at the place of ++? Lew <noone@lewscanon.com> - 2011-05-19 15:29 -0400

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