public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug rtl-optimization/25629]  New: -mcpu=601 doesn't use MQ register
@ 2006-01-01 20:06 stef dot simoens at scarlet dot be
  2006-01-01 20:15 ` [Bug target/25629] " pinskia at gcc dot gnu dot org
  0 siblings, 1 reply; 3+ messages in thread
From: stef dot simoens at scarlet dot be @ 2006-01-01 20:06 UTC (permalink / raw)
  To: gcc-bugs

(up to) gcc-3.4.3 -mcpu=601 compiled code uses the MQ register

(at least) gcc-4.0.1 -mcpu=601 compiled code doesn't use MQ any more

tested with:
simple function which calculates remainder

int mod(int a, int b) {
  return a % b;
}

Why is that?


-- 
           Summary: -mcpu=601 doesn't use MQ register
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stef dot simoens at scarlet dot be


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25629



^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug target/25629] -mcpu=601 doesn't use MQ register
  2006-01-01 20:06 [Bug rtl-optimization/25629] New: -mcpu=601 doesn't use MQ register stef dot simoens at scarlet dot be
@ 2006-01-01 20:15 ` pinskia at gcc dot gnu dot org
  0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-01 20:15 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from pinskia at gcc dot gnu dot org  2006-01-01 20:15 -------
This is most likely a cost issue.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25629



^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug target/25629] -mcpu=601 doesn't use MQ register
       [not found] <bug-25629-4@http.gcc.gnu.org/bugzilla/>
@ 2012-08-16 10:12 ` segher at gcc dot gnu.org
  0 siblings, 0 replies; 3+ messages in thread
From: segher at gcc dot gnu.org @ 2012-08-16 10:12 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25629

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |segher at gcc dot gnu.org
         Resolution|                            |WONTFIX

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> 2012-08-16 10:12:11 UTC ---
Nothing will ever use the MQ register anymore: all support for
the old POWER ISA has been removed, and PowerPC does not have
an MQ register.


^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-08-16 10:12 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-01-01 20:06 [Bug rtl-optimization/25629] New: -mcpu=601 doesn't use MQ register stef dot simoens at scarlet dot be
2006-01-01 20:15 ` [Bug target/25629] " pinskia at gcc dot gnu dot org
     [not found] <bug-25629-4@http.gcc.gnu.org/bugzilla/>
2012-08-16 10:12 ` segher at gcc dot gnu.org

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).