mips.md (trucndihi2,truncdiqi2): Change these to support mips16.

	* mips.md (trucndihi2,truncdiqi2): Change these to support
	mips16.

From-SVN: r17868

gcc/ChangeLog

+Thu Feb 12 14:04:09 1998  Gavin Koch  <gavin@cygnus.com>
+
+	* mips.md (trucndihi2,truncdiqi2): Change these to support 
+	mips16.
+
 Thu Feb 12 11:34:55 1998  Gavin Koch  <gavin@cygnus.com>
 
 	* mips/mips.c (movdi_operand): Direct referances to symbols

gcc/config/mips/mips.md

@@ -3188,20 +3188,33 @@ move\\t%0,%z4\\n\\
 (define_insn "truncdihi2"
   [(set (match_operand:HI 0 "register_operand" "=d")
 	(truncate:HI (match_operand:DI 1 "se_register_operand" "d")))]
-  "TARGET_64BIT && !TARGET_MIPS16"
-  "andi\\t%0,%1,0xffff"
+  "TARGET_64BIT"
+  "*
+{
+  if (TARGET_MIPS16)
+    return \"dsll\\t%0,%1,48\;dsra\\t%0,48\";
+  return \"andi\\t%0,%1,0xffff\";
+}"
   [(set_attr "type"	"darith")
    (set_attr "mode"	"HI")
-   (set_attr "length"	"1")])
-
+   (set (attr "length")	(if_then_else (eq (symbol_ref "mips16") (const_int 0))
+				      (const_int 1)
+				      (const_int 4)))])
 (define_insn "truncdiqi2"
   [(set (match_operand:QI 0 "register_operand" "=d")
 	(truncate:QI (match_operand:DI 1 "se_register_operand" "d")))]
-  "TARGET_64BIT && !TARGET_MIPS16"
-  "andi\\t%0,%1,0x00ff"
+  "TARGET_64BIT"
+  "*
+{
+  if (TARGET_MIPS16)
+    return \"dsll\\t%0,%1,56\;dsra\\t%0,56\";
+  return \"andi\\t%0,%1,0x00ff\"; 
+}"
   [(set_attr "type"	"darith")
    (set_attr "mode"	"QI")
-   (set_attr "length"	"1")])
+   (set (attr "length")	(if_then_else (eq (symbol_ref "mips16") (const_int 0))
+				      (const_int 1)
+				      (const_int 4)))])
 
 ;; Combiner patterns to optimize shift/truncate combinations.
 (define_insn ""