Subversion Repositories signed_unsigned_multiplier_and_divider

--      Package File Template

--

--      Purpose: This package defines supplemental types, subtypes, 

--               constants, and functions 

library IEEE;

use IEEE.STD_LOGIC_1164.all;

use IEEE.numeric_std.all;

package sys_primegen_package is

-- 1 bit microinstruction fields

constant i_nop,         m_nop,  n_nop,  ci_zero, muldiv_nop,    uart_nop: std_logic             := '0';

constant i_load,        m_load,         n_load,         ci_one,         muldiv_start,   uart_send: std_logic            := '1';

-- 2 bit microinstruction fields

constant mode_umul: std_logic_vector(1 downto 0)                 := "00";

constant mode_smul: std_logic_vector(1 downto 0)                 := "01";

constant mode_udiv: std_logic_vector(1 downto 0)                 := "10";

constant mode_sdiv: std_logic_vector(1 downto 0)                 := "11";

-- 3 bit microinstruction fields

constant muxa_zero,     muxb_const, alu_adc,            if_next_else_next               : std_logic_vector(2 downto 0) := "000";

constant muxa_m,                muxb_m,         alu_sbc,                if_next_else_repeat     : std_logic_vector(2 downto 0) := "001";

constant muxa_arg0,     muxb_two,                                       if_goto_else_next               : std_logic_vector(2 downto 0) := "010";

constant muxa_n,                muxb_n,                                         if_gosub_else_next      : std_logic_vector(2 downto 0) := "011";

constant muxa_prod,     muxb_four,      alu_asc0,       if_return_else_next     : std_logic_vector(2 downto 0) := "100";

constant muxa_ibcd,     muxb_i,         alu_asc1,       if_goto_else_start      : std_logic_vector(2 downto 0) := "101";

constant muxa_nbcdh,    muxb_modulo,alu_asc2,   if_gosub_else_repeat    : std_logic_vector(2 downto 0) := "110";

constant muxa_nbcdl,    muxb_arg1,      alu_asc3                                                                        : std_logic_vector(2 downto 0) := "111";

-- 4 bit microinstruction fields

constant cond_buttonstart               : std_logic_vector(3 downto 0) := "0000";

constant cond_uartbusy                  : std_logic_vector(3 downto 0) := "0001";

constant cond_alugreaterthan    : std_logic_vector(3 downto 0) := "0010";

constant cond_alulessthan               : std_logic_vector(3 downto 0) := "0011";

constant cond_muldivready               : std_logic_vector(3 downto 0) := "0100";

constant cond_aluzero                   : std_logic_vector(3 downto 0) := "0101";

constant cond_muldiverror               : std_logic_vector(3 downto 0) := "0110";

constant cond_false                             : std_logic_vector(3 downto 0) := "0111";

constant cond_ibcdready                 : std_logic_vector(3 downto 0) := "1000";

constant cond_uartready                 : std_logic_vector(3 downto 0) := "1001";

constant cond_alugreaterorequal: std_logic_vector(3 downto 0):= "1010";

constant cond_nbcdready                 : std_logic_vector(3 downto 0) := "1011";

constant cond_muldivnotready    : std_logic_vector(3 downto 0) := "1100";

constant cond_alunotzero                : std_logic_vector(3 downto 0) := "1101";

constant cond_muldivok                  : std_logic_vector(3 downto 0) := "1110";

constant cond_true                              : std_logic_vector(3 downto 0) := "1111";

end sys_primegen_package;