m68k: Convert to atomic_test_and_set.

        * config/m68k/m68k.c (TARGET_ATOMIC_TEST_AND_SET_TRUEVAL): New.
        * config/m68k/sync.md (atomic_test_and_set): Rename from
        sync_test_and_setqi and adjust the operands.
        (atomic_test_and_set_1): Rename from sync_test_and_setqi_1
        and unconditionally enable.

From-SVN: r183585

gcc/ChangeLog

 2012-01-27  Richard Henderson  <rth@redhat.com>
 
+	* config/m68k/m68k.c (TARGET_ATOMIC_TEST_AND_SET_TRUEVAL): New.
+	* config/m68k/sync.md (atomic_test_and_set): Rename from
+	sync_test_and_setqi and adjust the operands.
+	(atomic_test_and_set_1): Rename from sync_test_and_setqi_1
+	and unconditionally enable.
+
+2012-01-27  Richard Henderson  <rth@redhat.com>
+
 	* config/sparc/sparc.c (TARGET_ATOMIC_TEST_AND_SET_TRUEVAL): New.
 	* config/sparc/sync.md (atomic_test_and_set): Only handle QImode.
 	(ldstub): Rename from ldstubqi.

gcc/config/m68k/m68k.c

@@ -303,6 +303,10 @@ static void m68k_init_sync_libfuncs (void) ATTRIBUTE_UNUSED;
 #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA
 #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA m68k_output_addr_const_extra
 
+/* The value stored by TAS.  */
+#undef TARGET_ATOMIC_TEST_AND_SET_TRUEVAL
+#define TARGET_ATOMIC_TEST_AND_SET_TRUEVAL 128
+
 static const struct attribute_spec m68k_attribute_table[] =
 {
   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,

gcc/config/m68k/sync.md

@@ -56,25 +56,23 @@
   ;; Elide the seq if operands[0] is dead.
   "cas<sz> %1,%4,%2\;seq %0")
 
-(define_expand "sync_test_and_setqi"
-  [(match_operand:QI 0 "register_operand" "")
-   (match_operand:QI 1 "memory_operand" "")
-   (match_operand:QI 2 "general_operand" "")]
-  "!TARGET_CAS"
+(define_expand "atomic_test_and_set"
+  [(match_operand:QI 0 "register_operand" "")		;; bool success output
+   (match_operand:QI 1 "memory_operand" "")		;; memory
+   (match_operand:SI 2 "const_int_operand" "")]		;; model
+  ""
 {
-  if (operands[2] != const1_rtx)
-    FAIL;
-  emit_insn (gen_sync_test_and_setqi_1 (operands[0], operands[1]));
+  emit_insn (gen_atomic_test_and_set_1 (operands[0], operands[1]));
   emit_insn (gen_negqi2 (operands[0], operands[0]));
   DONE;
 })
 
-(define_insn "sync_test_and_setqi_1"
+(define_insn "atomic_test_and_set_1"
   [(set (match_operand:QI 0 "register_operand" "=d")
 	(unspec_volatile:QI
 	  [(match_operand:QI 1 "memory_operand" "+m")]
 	  UNSPECV_TAS_1))
    (set (match_dup 1)
 	(unspec_volatile:QI [(match_dup 1)] UNSPECV_TAS_2))]
-  "!TARGET_CAS"
+  ""
   "tas %1\;sne %0")