Add srd and srw

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>

execute1.vhdl

@@ -268,6 +268,12 @@ begin
 					result := result_with_carry(63 downto 0);
 					ctrl_tmp.carry <= result_with_carry(64);
 					result_en := 1;
+				when OP_SRD =>
+					result := ppc_srd(e.read_data1, e.read_data2);
+					result_en := 1;
+				when OP_SRW =>
+					result := ppc_srw(e.read_data1, e.read_data2);
+					result_en := 1;
 				when OP_SUBF =>
 					result := ppc_subf(e.read_data1, e.read_data2);
 					result_en := 1;