(mulsi3_big): Use low half of result.

Use offset 1 in subregs in actual fmlow insn.
(fmlow pattern): Split this into alternatives for big and little end.

From-SVN: r2055

gcc/config/i860/i860.md

@@ -1725,9 +1725,9 @@
   [(set (subreg:SI (match_dup 4) 1) (match_operand:SI 1 "general_operand" ""))
    (set (subreg:SI (match_dup 5) 1) (match_operand:SI 2 "general_operand" ""))
    (clobber (match_dup 3))
-   (set (subreg:SI (match_dup 3) 0)
-	(mult:SI (subreg:SI (match_dup 4) 0) (subreg:SI (match_dup 5) 0)))
-   (set (match_operand:SI 0 "register_operand" "") (subreg:SI (match_dup 3) 0))]
+   (set (subreg:SI (match_dup 3) 1)
+	(mult:SI (subreg:SI (match_dup 4) 1) (subreg:SI (match_dup 5) 1)))
+   (set (match_operand:SI 0 "register_operand" "") (subreg:SI (match_dup 3) 1))]
   "WORDS_BIG_ENDIAN"
   "
 {
@@ -1740,7 +1740,14 @@
   [(set (subreg:SI (match_operand:DI 0 "register_operand" "=f") 0)
 	(mult:SI (subreg:SI (match_operand:DI 1 "register_operand" "f") 0)
 		 (subreg:SI (match_operand:DI 2 "register_operand" "f") 0)))]
-  ""
+  "! WORDS_BIG_ENDIAN"
+  "fmlow.dd %2,%1,%0")
+
+(define_insn ""
+  [(set (subreg:SI (match_operand:DI 0 "register_operand" "=f") 1)
+	(mult:SI (subreg:SI (match_operand:DI 1 "register_operand" "f") 1)
+		 (subreg:SI (match_operand:DI 2 "register_operand" "f") 1)))]
+  "WORDS_BIG_ENDIAN"
   "fmlow.dd %2,%1,%0")
 
 ;;- and instructions (with compliment also)