[Bug target/50705] Wrong assembly generated in ppc 476

[santoshkumar.a at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #4 from SK santoshkumar.a at gmail dot com 2011-10-13 10:46:32 
UTC ---
Please download the full dump(14MB)from ftp0.lsil.com by following below
commands
login:
user: ftp, 
password: anonymous, 
cd pub
binary #
get gcc_bug_ppc_476_mini.zip (NOTE:: ls/dir not supported)
quit

[Bug target/50705] Wrong assembly generated in ppc 476

[santoshkumar.a at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #5 from SK santoshkumar.a at gmail dot com 2011-10-14 03:29:48 
UTC ---
Wrong assembly being is generated in most of the bitwise and's conditions that
have pass are failing and those that have to fail are passing.

[Bug target/50705] Wrong assembly generated in ppc 476

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #6 from Andrew Pinski pinskia at gcc dot gnu.org 2011-10-14 
03:36:01 UTC ---
Little-Endian 32-bit.  Is there a reason why you are using little-endian with
PPC?

[Bug target/50705] Wrong assembly generated in ppc 476

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #7 from Andrew Pinski pinskia at gcc dot gnu.org 2011-10-14 
03:36:38 UTC ---
How did you configure GCC?

[Bug target/50705] Wrong assembly generated in ppc 476

[santoshkumar.a at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #8 from SK santoshkumar.a at gmail dot com 2011-10-14 04:48:13 
UTC ---
Yes the HW engine that is present on the controller works in Little endian
therefore we need linux to work in LE on PPC. 

I changed 
Binutils
GLIBC
GCC

GCC Changes::


Binutils
gas/configure:
  case $endian in
  big)  ;;
  little) ;;


GLIBC
GCC

1)
gcc/config/rs6000/sysv4.h
#defineTARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS |
MASK_LITTLE_ENDIAN)
ASM_SPEC

2)
mcall-gnu :-mlittle;\
++  mcall-i960-old:-mlittle}\
++-mlittle

3)
#define CC1_ENDIAN_DEFAULT_SPEC %(cc1_endian_little)
#defineMULTILIB_DEFAULTS { mlittle, mcall-sysv }

4)
CC1_SPEC
mcall-gnu : -mlittle %(cc1_endian_little);  \
+   mcall-i960-old: -mlittle %(cc1_endian_little);  \
+ : %(cc1_endian_default)}  \

5)
LINK_SPEC:
added -EL at the end

LINK_TARGET_SPEC
added  --oformat elf32-powerpcle at end

[Bug target/50705] Wrong assembly generated in ppc 476

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

Andrew Pinski pinskia at gcc dot gnu.org changed:

   What|Removed |Added

   Keywords||wrong-code
  Component|c   |target
   Severity|blocker |normal

--- Comment #2 from Andrew Pinski pinskia at gcc dot gnu.org 2011-10-12 
17:25:00 UTC ---
Can you attach it to the bug rather than use another URL?  Also can you use
tar/gzip and not rar (rar is not fully free and such).

[Bug target/50705] Wrong assembly generated in ppc 476

[santoshkumar.a at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50705

--- Comment #3 from SK santoshkumar.a at gmail dot com 2011-10-13 05:41:20 
UTC ---
Created attachment 25481
  -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=25481
system map, objdump, source code

As the earlier file was 14MB with large objdump.I have copied the code around
the area of problem. 

In the objdump search for page_alloc.c:5362 where this issue is seen. You can
compare the same with the code in the attachment.