[Patch: RL78] Fix interrupt handling for G10 target

[Vinay Kumar. G]

Hi, 

This patch fixes G10 target support for interrupt functions in the recently 
submitted patch, "Improve interrupt function generation"
http://gcc.gnu.org/ml/gcc-patches/2013-05/msg00011.html

The G10 target does not support the "sel rbn" insn as it has only bank 0.
Conditions have been added to check for this.

Tested with rl78-elf target simulator.

Regards,
Vinay Kumar
vinay.g@kpitcummins.com

gcc/ChangeLog
2013-05-06  Vinay Kumar <vinay.g@kpitcummins.com>

	* config/rl78/rl78.c (rl78_expand_prologue): G10 target
	  support added.
    (rl78_expand_epilogue): G10 target support added.
 
	
--- rl78.c.org	2013-05-06 12:25:05.000000000 +0530
+++ rl78.c	2013-05-06 12:51:29.000000000 +0530
@@ -1020,7 +1020,7 @@ rl78_expand_prologue (void)
   if (rl78_is_naked_func ())
   return;
 
-  rb = is_interrupt_func (cfun->decl) ? -1 : 0;
+  rb = (is_interrupt_func (cfun->decl) && !TARGET_G10)? -1 : 0;
   if (!cfun->machine->computed)
     rl78_compute_frame_info ();
 
@@ -1049,7 +1049,7 @@ rl78_expand_prologue (void)
       }
 
   /* Interrupt functions use rb3 instead of rb0.  */
-  if (is_interrupt_func (cfun->decl))
+  if (is_interrupt_func (cfun->decl) && !TARGET_G10)
     {
       if (rb != 3)
 	emit_insn (gen_sel_rb (GEN_INT (3)));
@@ -1089,7 +1089,7 @@ rl78_expand_epilogue (void)
   if (rl78_is_naked_func ())
     return;
 
-  rb = is_interrupt_func (cfun->decl) ? 3 : 0;
+  rb = (is_interrupt_func (cfun->decl) && !TARGET_G10) ? 3 : 0;
 
   if (frame_pointer_needed)
     {