dt/deepjit: disc/fetch added

[calu.git] / cpu / src / decoder_b.vhd

diff --git a/cpu/src/decoder_b.vhd b/cpu/src/decoder_b.vhd
index 525d408170a0b6b5bca6b12cfe42ec07f85df0e1..ed9ed4a290cf3178670836d0800b19fcd058154f 100644 (file)
--- a/cpu/src/decoder_b.vhd
+++ b/cpu/src/decoder_b.vhd
@@ -312,16 +312,21 @@ begin
                instr_s.reg_dest_addr := instruction(22 downto 19);
                instr_s.op_group := STACK_OP;
                instr_s.op_detail(NO_PSW_OPT) := '1';
+               instr_s.op_detail(PWREN_OPT) := '1';
        
                case instruction(18 downto 17) is
-                       when "00" => 
+                       when "00" => --pop
                                instr_s.op_detail(PUSH_OPT) := '0';
                        
-                       when "01" => null;
+                       when "01" => --disc
+                               instr_s.op_detail(PUSH_OPT) := '0';
+                               instr_s.op_detail(NO_DST_OPT) := '1';
                        
-                       when "10" => null;
+                       when "10" => --fetch
+                               instr_s.op_detail(PUSH_OPT) := '0';
+                               instr_s.op_detail(PWREN_OPT) := '0';
                        
-                       when "11" =>
+                       when "11" => --push
                                instr_s.op_detail(PUSH_OPT) := '1';
                                
                        when others => null;