public inbox for cgen@sourceware.org
 help / color / mirror / Atom feed
From: Dave Brolley <brolley@redhat.com>
To: Doug Evans <dje@sebabeach.org>
Cc: cgen@sourceware.org
Subject: Re: CGEN_BITSET
Date: Mon, 22 Jun 2009 16:00:00 -0000	[thread overview]
Message-ID: <4A3FAA79.3050203@redhat.com> (raw)
In-Reply-To: <4A3D6504.5010203@sebabeach.org>

Hi Doug,

The mep port required an inderminate and configurable number of ISA's to 
be possible, so we needed something that could represent an unspecified 
number of bits (more then 32 or 64 possibly) in a mask. The intent was 
not to treat isa specially. It just turned out to be the first bit mask 
to require this treatment.

CGEN_BITSET is simply a bit mask represented by character strings as 
opposed to integers.

Dave

Doug Evans wrote:
> Treating "isa" specially is a bit of a hack.  What's the story behind 
> CGEN_BITSET?
>
> (define (gen-attr-type attr)
>  (if (string=? (string-downcase (gen-sym attr)) "isa")
>      "CGEN_BITSET"
>      (case (attr-kind attr)
>        ((boolean) "int")
>        ((bitset)  "unsigned int")
>        ((integer) "int")
>        ((enum)    (string-append "enum " (string-downcase (gen-sym 
> attr)) "_attr"))
>        ))
> )
>

  reply	other threads:[~2009-06-22 16:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-20 22:39 CGEN_BITSET Doug Evans
2009-06-22 16:00 ` Dave Brolley [this message]
2009-06-22 16:19   ` CGEN_BITSET Doug Evans

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4A3FAA79.3050203@redhat.com \
    --to=brolley@redhat.com \
    --cc=cgen@sourceware.org \
    --cc=dje@sebabeach.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).