[Bug target/28207] New: 128-bit IBM long double misaligned on stack

[Bug target/28207] New: 128-bit IBM long double misaligned on stack

[amodra at bigpond dot net dot au]

long doubles are only aligned to word boundaries when passed via the stack (ie.
to a function that uses more than 8 fp regs for other parameters).  The va_arg
support expects long doubles to be double word aligned, resulting in a mismatch
between caller and callee for variable argument functions.


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           Summary: 128-bit IBM long double misaligned on stack
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amodra at bigpond dot net dot au
GCC target triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[amodra at bigpond dot net dot au]

------- Comment #1 from amodra at bigpond dot net dot au  2006-06-30 10:10 -------
Created an attachment (id=11783)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11783&action=view)
testcase


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[amodra at bigpond dot net dot au]

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amodra at bigpond dot net dot au changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-06-30 10:11:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[amodra at gcc dot gnu dot org]

------- Comment #2 from amodra at gcc dot gnu dot org  2006-07-04 03:35 -------
Subject: Bug 28207

Author: amodra
Date: Tue Jul  4 03:35:48 2006
New Revision: 115170

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115170
Log:
        PR target/28207
        * config/rs6000/rs6000.c (function_arg_boundary): Double-word align
        128-bit IBM long doubles for ABI_V4.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[amodra at gcc dot gnu dot org]

------- Comment #3 from amodra at gcc dot gnu dot org  2006-07-04 04:38 -------
Subject: Bug 28207

Author: amodra
Date: Tue Jul  4 04:37:59 2006
New Revision: 115171

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115171
Log:
        PR target/28207
        * config/rs6000/rs6000.c (function_arg_boundary): Double-word align
        128-bit IBM long doubles for ABI_V4.


Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/config/rs6000/rs6000.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[amodra at bigpond dot net dot au]

------- Comment #4 from amodra at bigpond dot net dot au  2006-07-04 04:41 -------
Patch applied 4.1 and 4.2


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amodra at bigpond dot net dot au changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2006-
                   |                            |07/msg00085.html
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207

[Bug target/28207] 128-bit IBM long double misaligned on stack

[dje at gcc dot gnu dot org]

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dje at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dje at gcc dot gnu dot org
   Target Milestone|---                         |4.1.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28207