mcore.c (TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE): Define.

	* config/mcore/mcore.c (TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE):
	Define.
	* config/mcore/mcore.md: Model memory latency with a simple DFA
	pipeline description instead of a define_function_unit.

From-SVN: r84146

gcc/ChangeLog

+2004-07-06  Steven Bosscher  <stevenb@suse.de>
+
+	* config/mcore/mcore.c (TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE):
+	Define.
+	* config/mcore/mcore.md: Model memory latency with a simple DFA
+	pipeline description instead of a define_function_unit.
+
 2004-07-05  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* langhooks-def.h (LANG_HOOKS_TREE_INLINING_VAR_MOD_TYPE_P): Extra arg.

gcc/config/mcore/mcore.c

@@ -196,6 +196,9 @@ static bool       mcore_return_in_memory	(tree, tree);
 #undef  TARGET_SETUP_INCOMING_VARARGS
 #define TARGET_SETUP_INCOMING_VARARGS	mcore_setup_incoming_varargs
 
+#undef TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE
+#define TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE hook_int_void_1
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 /* Adjust the stack and return the number of bytes taken to do it.  */

gcc/config/mcore/mcore.md

@@ -41,15 +41,17 @@
 ;; calculations and the literal table placement into the assembler,
 ;; where their interactions can be managed in a single place.
 
-; All MCORE instructions are two bytes long.
+;; All MCORE instructions are two bytes long.
 
 (define_attr "length" "" (const_int 2))
 
-;; (define_function_unit {name} {num-units} {n-users} {test}
-;;                       {ready-delay} {issue-delay} [{conflict-list}])
-				      
-
-(define_function_unit "memory" 1 1 (eq_attr "type" "load") 2 0)
+;; Scheduling.  We only model a simple load latency.
+(define_insn_reservation "any_insn" 1
+			 (eq_attr "type" "!load")
+			 "nothing")
+(define_insn_reservation "memory" 2
+			 (eq_attr "type" "load")
+			 "nothing")
 
 ;; -------------------------------------------------------------------------
 ;; Test and bit test