[PATCH, e500] Fix store.exp failures

[Luis Machado <lgustavo at codesourcery dot com>]

Hi,

I'm seeing a few failures for e500 in store.exp. It fails to display 
multi-piece values correctly if one (or more) of those pieces happens to 
live in one of the SPE register halves.

When DWARF asks for information about the SPE register half, GDB in turn 
offers information about the whole SPE register, which is 4 bytes longer 
in size. DWARF will then proceed to grab a piece of those 8 bytes and, 
obviously, will end up fetching the wrong half.

In reality, GDB should return the REAL register (SPE half) instead of 
returning the PSEUDO register (full SPE register comprised of one SPE 
half and one GPR).

This on-liner fixes this problem and gives full passes for store.exp on 
e500.

OK?

Luis

2013-06-06  Luis Machado  <lgustavo@codesourcery.com>

	* rs6000-tdep.c (rs6000_dwarf2_reg_to_regnum): Return the real register
	number instead of the pseudo register one.

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index d3ff09d..c1630ea 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -2896,7 +2896,7 @@ rs6000_dwarf2_reg_to_regnum (struct gdbarch *gdbarch, int num)
   else if (1124 <= num && num < 1124 + 32)
     return tdep->ppc_vr0_regnum + (num - 1124);
   else if (1200 <= num && num < 1200 + 32)
-    return tdep->ppc_ev0_regnum + (num - 1200);
+    return tdep->ppc_ev0_upper_regnum + (num - 1200);
   else
     switch (num)
       {