PA fixes for return2.exp

[law@redhat.com]

This patch fixes the assorted failures in return2.exp.  In a nutshell, for
sub-word return types, we stored the return value into the wrong location
in the register array.

This patch makes STORE_RETURN_VALUE act like EXTRACT_RETURN_VALUE and fixes
the return2.exp failures.

	* tm-hppa.h (STORE_RETURN_VALUE): Update to deal with sub-word
	return types.

Index: tm-hppa.h
===================================================================
RCS file: /cvs/cvsfiles/devo/gdb/config/pa/tm-hppa.h,v
retrieving revision 1.86
diff -c -3 -p -r1.86 tm-hppa.h
*** tm-hppa.h	2001/06/14 21:03:22	1.86
--- tm-hppa.h	2001/12/19 18:13:19
*************** extern use_struct_convention_fn hppa_use
*** 361,371 ****
     then we put it in the float registers too.  */
  
  #define STORE_RETURN_VALUE(TYPE,VALBUF) \
!   write_register_bytes (REGISTER_BYTE (28),(VALBUF), TYPE_LENGTH (TYPE)) ; \
!   if (!SOFT_FLOAT) \
!     write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_FLT \
! 			   ? REGISTER_BYTE (FP4_REGNUM) \
! 			   : REGISTER_BYTE (28)),		\
  			  (VALBUF), TYPE_LENGTH (TYPE))
  
  /* Extract from an array REGBUF containing the (raw) register state
--- 361,373 ----
     then we put it in the float registers too.  */
  
  #define STORE_RETURN_VALUE(TYPE,VALBUF) \
!   write_register_bytes (REGISTER_BYTE (28) +			\
! 		        (TYPE_LENGTH (TYPE) > 4			\
! 			 ? (8 - TYPE_LENGTH (TYPE))		\
! 			 : (4 - TYPE_LENGTH (TYPE))),		\
! 			(VALBUF), TYPE_LENGTH (TYPE));		\
!   if (!SOFT_FLOAT && TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
!     write_register_bytes (REGISTER_BYTE (FP4_REGNUM), \
  			  (VALBUF), TYPE_LENGTH (TYPE))
  
  /* Extract from an array REGBUF containing the (raw) register state