Fix Multiply costs for AMD -march=znver1.

2016-03-05  Venkataramanan Kumar  <venkataramanan.kumar@amd.com>

        * config/i386/i386.c (znver1_cost): Fix Multiply cost.

From-SVN: r234008

gcc/ChangeLog

 2016-03-05  Venkataramanan Kumar  <Venkataramanan.kumar@amd.com>
 
+	* config/i386/i386.c (znver1_cost): Fix Multiply cost.
+
+2016-03-05  Venkataramanan Kumar  <Venkataramanan.kumar@amd.com>
+
 	Fix sseimul type attribute.
 	* config/i386/znver1.md 
 	(znver1_sseimul, znver1_sseimul_avx256, znver1_sseimul_load,

gcc/config/i386/i386.c

@@ -1350,11 +1350,11 @@ struct processor_costs znver1_cost = {
   COSTS_N_INSNS (1),			/* cost of a lea instruction.  */
   COSTS_N_INSNS (1),			/* variable shift costs.  */
   COSTS_N_INSNS (1),			/* constant shift costs.  */
-  {COSTS_N_INSNS (4),			/* cost of starting multiply for QI.  */
-   COSTS_N_INSNS (4),			/*				 HI.  */
-   COSTS_N_INSNS (4),			/*				 SI.  */
-   COSTS_N_INSNS (6),			/*				 DI.  */
-   COSTS_N_INSNS (6)},			/*			      other.  */
+  {COSTS_N_INSNS (3),			/* cost of starting multiply for QI.  */
+   COSTS_N_INSNS (3),			/*				 HI.  */
+   COSTS_N_INSNS (3),			/*				 SI.  */
+   COSTS_N_INSNS (4),			/*				 DI.  */
+   COSTS_N_INSNS (4)},			/*			      other.  */
   0,					/* cost of multiply per each bit
 					    set.  */
   {COSTS_N_INSNS (19),			/* cost of a divide/mod for QI.  */