From: Doug Evans <dje@sebabeach.org>
To: Dave Korn <dave.korn.cygwin@googlemail.com>
Cc: cgen@sourceware.org
Subject: Re: new do-count rtl
Date: Fri, 28 Aug 2009 02:37:00 -0000 [thread overview]
Message-ID: <4A9742F7.8090503@sebabeach.org> (raw)
In-Reply-To: <4A973D3A.3010703@gmail.com>
Dave Korn wrote:
> Doug Evans wrote:
>
>> Doug Evans wrote:
>>
>>> Hi.
>>>
>>> What do folks think of adding a new rtl for iterating a specified
>>> number of times.
>>>
>>> Something like
>>>
>>> (do-count nr-times iter-var expr1 [expr2 ...])
>>>
>>> For now the result would always be void, and iter-var would always
>>> have mode INT.
>>> The set of expressions is performed nr-times times and iter-var has
>>> values 0 ... nr-times - 1.
>>>
>>> ?
>>>
>>>
>> Checked in.
>>
>
> I don't speak scheme or guile, but I'm learning, so forgive me in advance if
> this is a dumb question: Does this differ from using a .map on an .iota when
> generating a parameter to an rtl s-expr?
>
> cheers,
> DaveK
>
>
If one knows the number of iterations in advance, yes, they're
essentially equivalent. do-count means less rtl, which can be useful,
but that's it.
[As it turns out I need to be able to make the number of iterations an
expression, and not just a constant.]
next prev parent reply other threads:[~2009-08-28 2:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-26 16:45 Doug Evans
2009-08-27 21:35 ` Doug Evans
2009-08-28 1:59 ` Dave Korn
2009-08-28 2:37 ` Doug Evans [this message]
2009-08-28 6:31 ` Doug Evans
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