[Bug target/15425] New: 128-bit division do not work

[Bug target/15425] New: 128-bit division do not work

[hebisch at math dot uni dot wroc dot pl]

The follwing program compiled by:
 ../gcc/xgcc -B../gcc tess_div.c
gives me:
$ ./a.out
6341068292483973050
the program:
#include <stdio.h>

int main(void)
{
        typedef int myi128 __attribute__ ((mode(TI)));
        myi128 x=0;
        myi128 y=32;
        long z=x/y;
        printf("%ld\n", z);
        return 0;
}

AFAIKS the arguments to `__divti3' function are passed incorrectly.
The problem affects GNU Pascal. Namely, gpc uses `bitsizetype' to
do adress calculation for packed arrays. On 64-bit targets 
`bitsizetype' is done with 128-bit precision. Since on x86_64
such arithmetic does not work (with 3.3.3 backend) it makes
packed arrays unusable ont that target.

-- 
           Summary: 128-bit division do not work
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hebisch at math dot uni dot wroc dot pl
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15425

[Bug target/15425] 128-bit division do not work

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
  GCC build triplet|x86_64-unknown-linux-gnu    |
   GCC host triplet|x86_64-unknown-linux-gnu    |
           Keywords|                            |ABI, wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15425

[Bug target/15425] 128-bit division do not work

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-19 22:58 -------
Does this worh with 3.4.x or 4.0.x?

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15425

[Bug target/15425] 128-bit division do not work

[hebisch at math dot uni dot wroc dot pl]

------- Additional Comments From hebisch at math dot uni dot wroc dot pl  2005-06-19 23:39 -------
Works fine with gcc-3.4.4 or gcc-4.0.0. IIRC gcc-3.4.0 also
worked. gcc-3.3.6 still fails.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15425

[Bug target/15425] 128-bit division do not work

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-19 23:42 -------
Closing as fixed for 3.4.0 as 3.3.x branch is no longer maintained.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15425