[RFA] sh-tdep.c: optimize and rename virtual register conversion functions

[Corinna Vinschen <vinschen@redhat.com>]

Hi,

the functions sh_sh4_register_convert_to_virtual and
sh_sh4_register_convert_to_raw are only called once each.  In both
cases, the register numbers are already tested for the correct range,
before the function is actually called.  Therefore it's possible to
optimize the register number tests away from both functions.

Also, I'd like to propose to rename both functions to get rid of the
"sh4" in the name.  The functions are universal so I'd like to reuse
them for an upcoming SH variant with different virtual register numbering,
if that's ok.


Thanks in advance,
Corinna


ChangeLog:

	* sh-tdep.c (sh_register_convert_to_virtual): Rename from
	sh_sh4_register_convert_to_virtual.  Remove register number test.
	(sh_register_convert_to_raw): Rename from
	sh_sh4_register_convert_to_raw.  Remove register number test.

Index: sh-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/sh-tdep.c,v
retrieving revision 1.156
diff -u -p -r1.156 sh-tdep.c
--- sh-tdep.c	26 Jan 2004 20:52:12 -0000	1.156
+++ sh-tdep.c	10 Feb 2004 15:58:04 -0000
@@ -1541,33 +1541,22 @@ sh_default_register_type (struct gdbarch
    because they are stored as 4 individual FP elements. */
 
 static void
-sh_sh4_register_convert_to_virtual (int regnum, struct type *type,
+sh_register_convert_to_virtual (int regnum, struct type *type,
 				    char *from, char *to)
 {
-  if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM)
-    {
-      DOUBLEST val;
-      floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword,
-			       from, &val);
-      store_typed_floating (to, type, val);
-    }
-  else
-    error
-      ("sh_register_convert_to_virtual called with non DR register number");
+  DOUBLEST val;
+  floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword,
+			   from, &val);
+  store_typed_floating (to, type, val);
 }
 
 static void
-sh_sh4_register_convert_to_raw (struct type *type, int regnum,
+sh_register_convert_to_raw (struct type *type, int regnum,
 				const void *from, void *to)
 {
-  if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM)
-    {
-      DOUBLEST val = extract_typed_floating (from, type);
-      floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword,
-				 &val, to);
-    }
-  else
-    error ("sh_register_convert_to_raw called with non DR register number");
+  DOUBLEST val = extract_typed_floating (from, type);
+  floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword,
+			     &val, to);
 }
 
 /* For vectors of 4 floating point registers. */
@@ -1609,7 +1598,7 @@ sh_pseudo_register_read (struct gdbarch 
 			    + register_size (gdbarch,
 					     base_regnum) * portion));
       /* We must pay attention to the endiannes. */
-      sh_sh4_register_convert_to_virtual (reg_nr,
+      sh_register_convert_to_virtual (reg_nr,
 					  gdbarch_register_type (gdbarch,
 								 reg_nr),
 					  temp_buffer, buffer);
@@ -1639,7 +1628,7 @@ sh_pseudo_register_write (struct gdbarch
       base_regnum = dr_reg_base_num (reg_nr);
 
       /* We must pay attention to the endiannes. */
-      sh_sh4_register_convert_to_raw (gdbarch_register_type (gdbarch, reg_nr),
+      sh_register_convert_to_raw (gdbarch_register_type (gdbarch, reg_nr),
 				      reg_nr, buffer, temp_buffer);
 
       /* Write the real regs for which this one is an alias.  */

-- 
Corinna Vinschen
Cygwin Developer
Red Hat, Inc.