200x-xx-xx Nathan Sidwell <nathan@codesourcery.com>

gcc/
200x-xx-xx  Nathan Sidwell  <nathan@codesourcery.com>

	* config/m68k/m68k.h (REGISTER_MOVE_COST): Simplify definition.
	(STACK_GROWS_DOWNWARD): Define to 1.
	(FUNCTION_VALUE, LIBCALL_VALUE, FUNCTION_VALUE_REGNO_P): Equivocate
	comments, emphasizing that these values are only defaults.
	* config/m68k/linux.h (LINK_SPEC): Fix formatting in #undef.
	* config/m68k/m68k.c (const_method): Remove trailing whitespace.

From-SVN: r120920

gcc/ChangeLog

+2007-01-18  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* config/m68k/m68k.h (REGISTER_MOVE_COST): Simplify definition.
+	(STACK_GROWS_DOWNWARD): Define to 1.
+	(FUNCTION_VALUE, LIBCALL_VALUE, FUNCTION_VALUE_REGNO_P): Equivocate
+	comments, emphasizing that these values are only defaults.
+	* config/m68k/linux.h (LINK_SPEC): Fix formatting in #undef.
+	* config/m68k/m68k.c (const_method): Remove trailing whitespace.
+
 2007-01-18  Richard Sandiford  <richard@codesourcery.com>
 
 	* config/m68k/m68k.md (cmpsi): Remove outdated flag_pic handling.

gcc/config/m68k/linux.h

@@ -82,7 +82,7 @@ Boston, MA 02110-1301, USA.  */
 
 #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
 
-#undef	LINK_SPEC
+#undef LINK_SPEC
 #define LINK_SPEC "-m m68kelf %{shared} \
   %{!shared: \
     %{!static: \

gcc/config/m68k/m68k.c

@@ -1754,7 +1754,7 @@ const_method (rtx constant)
 
   /* The ColdFire doesn't have byte or word operations.  */
   /* FIXME: This may not be useful for the m68060 either.  */
-  if (!TARGET_COLDFIRE) 
+  if (!TARGET_COLDFIRE)
     {
       /* if -256 < N < 256 but N is not in range for a moveq
 	 N^ff will be, so use moveq #N^ff, dreg; not.b dreg.  */

gcc/config/m68k/m68k.h

@@ -577,13 +577,11 @@ extern enum reg_class regno_reg_class[];
 
 /* Moves between fp regs and other regs are two insns.  */
 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2)	\
-  (((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)	        \
-    || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS)	\
-    ? 4 : 2)
+  ((((CLASS1) == FP_REGS) != ((CLASS2) == FP_REGS)) ? 4 : 2)
 
 /* Stack layout; function entry, exit and calling.  */
 
-#define STACK_GROWS_DOWNWARD
+#define STACK_GROWS_DOWNWARD 1
 #define FRAME_GROWS_DOWNWARD 1
 #define STARTING_FRAME_OFFSET 0
 
@@ -608,14 +606,14 @@ extern enum reg_class regno_reg_class[];
 	    == void_type_node)))				\
    ? (SIZE) : 0)
 
-/* On the m68k the return value is always in D0.  */
+/* On the m68k the return value defaults to D0.  */
 #define FUNCTION_VALUE(VALTYPE, FUNC)  \
   gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
 
-/* On the m68k the return value is always in D0.  */
+/* On the m68k the return value defaults to D0.  */
 #define LIBCALL_VALUE(MODE)  gen_rtx_REG (MODE, 0)
 
-/* On the m68k, D0 is the only register used.  */
+/* On the m68k, D0 is usually the only register used.  */
 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
 
 /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for