i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.

* config/i386/i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.
* config/i386/sse.md: Add n to negated FMA pattern names.

From-SVN: r174493

gcc/ChangeLog

 2011-05-31  Alexandre Oliva  <aoliva@redhat.com>
 
+	* config/i386/i386.c (ix86_rtx_costs): Drop NEG from sub for FMA.
+	* config/i386/sse.md: Add n to negated FMA pattern names.
+
+2011-05-31  Alexandre Oliva  <aoliva@redhat.com>
+
 	* gcc.c (driver_handle_option): Fix disabling of -fcompare-debug.
 
 2011-05-31  Alexandre Oliva  <aoliva@redhat.com>

gcc/config/i386/i386.c

@@ -29226,12 +29226,12 @@ ix86_rtx_costs (rtx x, int code, int outer_code_i, int *total, bool speed)
         /* Negate in op0 or op2 is free: FMS, FNMA, FNMS.  */
 	sub = XEXP (x, 0);
 	if (GET_CODE (sub) == NEG)
-	  sub = XEXP (x, 0);
+	  sub = XEXP (sub, 0);
 	*total += rtx_cost (sub, FMA, speed);
 
 	sub = XEXP (x, 2);
 	if (GET_CODE (sub) == NEG)
-	  sub = XEXP (x, 0);
+	  sub = XEXP (sub, 0);
 	*total += rtx_cost (sub, FMA, speed);
 	return true;
       }

gcc/config/i386/sse.md

@@ -1731,7 +1731,7 @@
   [(set_attr "type" "ssemuladd")
    (set_attr "mode" "<MODE>")])
 
-(define_insn "*fma_fmadd_<mode>"
+(define_insn "*fma_fnmadd_<mode>"
   [(set (match_operand:FMAMODE 0 "register_operand" "=x,x,x")
 	(fma:FMAMODE
 	  (neg:FMAMODE
@@ -1746,7 +1746,7 @@
   [(set_attr "type" "ssemuladd")
    (set_attr "mode" "<MODE>")])
 
-(define_insn "*fma_fmsub_<mode>"
+(define_insn "*fma_fnmsub_<mode>"
   [(set (match_operand:FMAMODE 0 "register_operand" "=x,x,x")
 	(fma:FMAMODE
 	  (neg:FMAMODE