else
incb(incb'high downto 1) := (others => '0');
end if;
-
- if (ext_reg.sel = '1') and ext_reg.wr_en = '1' then
- case ext_reg.addr(1 downto 0) is
- when "00" =>
- if ext_reg.byte_en(0) = '1' then
- reg_nxt_v.status := (data_v(0), data_v(1), data_v(3), data_v(2));
- psw <= reg_nxt_v.status;
- end if;
- when "01" =>
- --STACK_POINTER
- tmp_data := (others =>'0');
- tmp_data(tmp_data'high downto BYTEADDR) := reg.preg(0);
-
- if ext_reg.byte_en(0) = '1' then
- tmp_data(byte_t'range) := data_v(byte_t'range);
- end if;
- if ext_reg.byte_en(1) = '1' then
- tmp_data((2*byte_t'length-1) downto byte_t'length) := data_v((2*byte_t'length-1) downto byte_t'length);
- end if;
- if ext_reg.byte_en(2) = '1' then
- tmp_data((3*byte_t'length-1) downto 2*byte_t'length) := data_v((3*byte_t'length-1) downto 2*byte_t'length);
- end if;
- if ext_reg.byte_en(3) = '1' then
- tmp_data((4*byte_t'length-1) downto 3*byte_t'length) := data_v((4*byte_t'length-1) downto 3*byte_t'length);
- end if;
-
- reg_nxt_v.preg(0) := tmp_data(tmp_data'high downto BYTEADDR);
- when others => null;
- end case;
- end if;
-
-
- if (ext_reg.sel = '1') and ext_reg.wr_en = '0' then
- case ext_reg.addr(1 downto 0) is
- when "00" =>
- if ext_reg.byte_en(0) = '1' then
- data_out_v(3 downto 0) := (reg.status.sign, reg.status.carry, reg.status.oflo, reg.status.zero);
- end if;
- when "01" =>
- --STACK_POINTER
- data_out_v(data_out_v'high downto BYTEADDR) := reg.preg(0);
- when others => null;
- end case;
- end if;
- sel_pval:= reg_nxt_v.preg(to_integer(unsigned(paddr)));
+ sel_pval:= reg_nxt_v.preg(0);
sel_pval_nxt := std_logic_vector(unsigned(sel_pval)+unsigned(incb));
if pwr_en = '1' then
- reg_nxt_v.preg(to_integer(unsigned(paddr))) := sel_pval_nxt;
+ reg_nxt_v.preg(0) := sel_pval_nxt;
end if;
reg_nxt_v.status := psw_nxt;
-- when "11" => ext_timer.byte_en <= "1000";
-- when others => null;
-- end case;
- when EXT_GPMP_ADDR =>
- ext_gpmp.sel <= enable;
- ext_anysel <= enable;
+-- when EXT_GPMP_ADDR =>
+ -- ext_gpmp.sel <= enable;
+-- ext_anysel <= enable;
-- ext_gpmp.wr_en <= wb_reg_nxt.dmem_write_en;
-- ext_gpmp.data <= ram_data;
-- ext_gpmp.addr <= wb_reg_nxt.address(wb_reg_nxt.address'high downto BYTEADDR);