[Bug target/29983] New: [Regression 4.2] Out of range offset for ldrd/strd intruction.

[Bug target/29983] New: [Regression 4.2] Out of range offset for ldrd/strd intruction.

[raj dot khem at gmail dot com]

GCC 4.2 is generating wrong offset while compiling the attached example. This
only happens when using -mcpu=iwmmxt option. It works ok on 3.4.6

/tmp/cc4oD6OO.s: Assembler messages:
/tmp/cc4oD6OO.s:15151: Error: bad immediate value for half-word offset (328)
/tmp/cc4oD6OO.s:15151: Error: bad immediate value for half-word offset (512)
/tmp/cc4oD6OO.s:15151: Error: bad immediate value for half-word offset (328)
/tmp/cc4oD6OO.s:15151: Error: bad immediate value for half-word offset (328)

To reproduce this compile the testcase with gcc -O2 -c -mcpu=iwmmxt


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           Summary: [Regression 4.2] Out of range offset for ldrd/strd
                    intruction.
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: raj dot khem at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: armv5tel-*-linux-gnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] [Regression 4.2] Out of range offset for ldrd/strd intruction.

[raj dot khem at gmail dot com]

------- Comment #1 from raj dot khem at gmail dot com  2006-11-26 03:27 -------
Created an attachment (id=12693)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12693&action=view)
testcase


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-11-26 03:50 -------
eabi was not added until at least 4.0.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|3.4.6                       |
            Summary|[Regression 4.2] Out of     |Out of range offset for
                   |range offset for ldrd/strd  |ldrd/strd intruction.
                   |intruction.                 |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-11-26 04:04 -------
Hmm, with that target I get:
checking target system type... Invalid configuration `armv5tel-linux-gnueabi':
machine `armv5tel' not recognized


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-11-26 04:36 -------
I see:
        ldrd    r2, [r1], #328


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[raj dot khem at gmail dot com]

------- Comment #5 from raj dot khem at gmail dot com  2006-11-26 07:05 -------
It is also reproducible using trunk and arm-none-eabi


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raj dot khem at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|armv5tel-*-linux-gnueabi    |arm-none-eabi
      Known to fail|4.2.0                       |4.2.0 4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[rearnsha at gcc dot gnu dot org]

------- Comment #6 from rearnsha at gcc dot gnu dot org  2007-01-09 11:10 -------
(In reply to comment #4)
> I see:
>         ldrd    r2, [r1], #328
> 

Which isn't a valid instruction (the offset is too large).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[rearnsha at gcc dot gnu dot org]

------- Comment #7 from rearnsha at gcc dot gnu dot org  2007-01-09 17:01 -------
Confirmed.  This is iwmmxt-specific and occurs because the co-processor
load-double-word instructions have a larger offset than LDRD.


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rearnsha at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-01-09 17:01:12
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983

[Bug target/29983] Out of range offset for ldrd/strd intruction.

[pbrook at gcc dot gnu dot org]

------- Comment #8 from pbrook at gcc dot gnu dot org  2007-03-02 22:51 -------
Fixed.
trunk r122437 http://gcc.gnu.org/ml/gcc-cvs/2007-03/msg00020.html
4.2 r122489 http://gcc.gnu.org/ml/gcc-cvs/2007-03/msg00072.html


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pbrook at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29983