i386.md (adddi_4_rex64, [...]): For operand2 -128 override length_immediate attribute to 1.

	* config/i386/i386.md (adddi_4_rex64, addsi_4, addhi_4): For
	operand2 -128 override length_immediate attribute to 1.
	* config/i386/predicates.md (constm128_operand): New predicate.

From-SVN: r147767

gcc/ChangeLog

 2009-05-21  Jakub Jelinek  <jakub@redhat.com>
 
+	* config/i386/i386.md (adddi_4_rex64, addsi_4, addhi_4): For
+	operand2 -128 override length_immediate attribute to 1.
+	* config/i386/predicates.md (constm128_operand): New predicate.
+
 	* config/i386/i386.c (memory_address_length): Handle %r12
 	the same as %rsp and %r13 the same as %rbp.  For %rsp and %rbp
 	also check REGNO.

gcc/config/i386/i386.md

@@ -6648,6 +6648,11 @@
      (if_then_else (match_operand:DI 2 "incdec_operand" "")
 	(const_string "incdec")
 	(const_string "alu")))
+   (set (attr "length_immediate")
+      (if_then_else
+	(and (eq_attr "type" "alu") (match_operand 2 "constm128_operand" ""))
+	(const_string "1")
+	(const_string "*")))
    (set_attr "mode" "DI")])
 
 (define_insn "*adddi_5_rex64"
@@ -7114,6 +7119,11 @@
      (if_then_else (match_operand:SI 2 "incdec_operand" "")
 	(const_string "incdec")
 	(const_string "alu")))
+   (set (attr "length_immediate")
+      (if_then_else
+	(and (eq_attr "type" "alu") (match_operand 2 "constm128_operand" ""))
+	(const_string "1")
+	(const_string "*")))
    (set_attr "mode" "SI")])
 
 (define_insn "*addsi_5"
@@ -7397,6 +7407,11 @@
      (if_then_else (match_operand:HI 2 "incdec_operand" "")
 	(const_string "incdec")
 	(const_string "alu")))
+   (set (attr "length_immediate")
+      (if_then_else
+	(and (eq_attr "type" "alu") (match_operand 2 "constm128_operand" ""))
+	(const_string "1")
+	(const_string "*")))
    (set_attr "mode" "SI")])
 
 

gcc/config/i386/predicates.md

@@ -587,6 +587,11 @@
   (and (match_code "const_int")
        (match_test "INTVAL (op) == 128")))
 
+;; Match exactly -128.
+(define_predicate "constm128_operand"
+  (and (match_code "const_int")
+       (match_test "INTVAL (op) == -128")))
+
 ;; Match 2, 4, or 8.  Used for leal multiplicands.
 (define_predicate "const248_operand"
   (match_code "const_int")