| Line 21... |
Line 21... |
Port ( reset : in STD_LOGIC;
|
Port ( reset : in STD_LOGIC;
|
clk : in STD_LOGIC; --! Main system clock
|
clk : in STD_LOGIC; --! Main system clock
|
FlagsDp : in STD_LOGIC_VECTOR (2 downto 0); --! Flags comming from the Datapath
|
FlagsDp : in STD_LOGIC_VECTOR (2 downto 0); --! Flags comming from the Datapath
|
DataDp : in STD_LOGIC_VECTOR (n downto 0); --! Data comming from the Datapath
|
DataDp : in STD_LOGIC_VECTOR (n downto 0); --! Data comming from the Datapath
|
outEnDp : out typeEnDis; --! Enable/Disable datapath output
|
outEnDp : out typeEnDis; --! Enable/Disable datapath output
|
MuxDp : out STD_LOGIC_VECTOR (2 downto 0); --! Select on datapath data from (Memory, Imediate, RegFileA, RegFileB, AluOut)
|
MuxDp : out dpMuxInputs; --! Select on datapath data from (Memory, Imediate, RegFileA, RegFileB, AluOut)
|
MuxRegDp : out STD_LOGIC_VECTOR(1 downto 0); --! Select Alu InputA (Memory,Imediate,RegFileA)
|
MuxRegDp : out STD_LOGIC_VECTOR(1 downto 0); --! Select Alu InputA (Memory,Imediate,RegFileA)
|
ImmDp : out STD_LOGIC_VECTOR (n downto 0); --! Imediate value passed to the Datapath
|
ImmDp : out STD_LOGIC_VECTOR (n downto 0); --! Imediate value passed to the Datapath
|
DpAluOp : out aluOps; --! Alu operations
|
DpAluOp : out aluOps; --! Alu operations
|
DpRegFileWriteAddr : out generalRegisters; --! General register address to write
|
DpRegFileWriteAddr : out generalRegisters; --! General register address to write
|
DpRegFileWriteEn : out STD_LOGIC; --! Enable register write
|
DpRegFileWriteEn : out STD_LOGIC; --! Enable register write
|
| Line 194... |
Line 194... |
nextExState <= initInstructionExecution;
|
nextExState <= initInstructionExecution;
|
else
|
else
|
case opcodeIR is
|
case opcodeIR is
|
-- MOV r2,r1 (See the testDatapath to see how to drive the datapath for this function)
|
-- MOV r2,r1 (See the testDatapath to see how to drive the datapath for this function)
|
when mov_reg =>
|
when mov_reg =>
|
MuxDp <= muxPos(fromRegFileB);
|
MuxDp <= fromRegFileB;
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg2)));
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg2)));
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileReadEnB <= '1';
|
DpRegFileReadEnB <= '1';
|
nextExState <= writeRegister;
|
nextExState <= writeRegister;
|
|
|
-- LOAD r1,10 (Load into r1, the value in the main memory located at address 10)
|
-- LOAD r1,10 (Load into r1, the value in the main memory located at address 10)
|
when ld_val =>
|
when ld_val =>
|
MuxDp <= muxPos(fromMemory);
|
MuxDp <= fromMemory;
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
-- The part that interface with the memory is located on the first process
|
-- The part that interface with the memory is located on the first process
|
nextExState <= writeRegister;
|
nextExState <= writeRegister;
|
|
|
-- STORE r1,10 (Store the value on r1 in the main memory located at address 10)
|
-- STORE r1,10 (Store the value on r1 in the main memory located at address 10)
|
when stom_val =>
|
when stom_val =>
|
MuxDp <= muxPos(fromRegFileB);
|
MuxDp <= fromRegFileB;
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileReadEnB <= '1';
|
DpRegFileReadEnB <= '1';
|
nextExState <= readRegisterB;
|
nextExState <= readRegisterB;
|
-- The part that interface with the memory is located on the first process
|
-- The part that interface with the memory is located on the first process
|
nextExState <= readRegisterB;
|
nextExState <= readRegisterB;
|
|
|
-- ADD r2,r0 (See the testDatapath to see how to drive the datapath for this function)
|
-- ADD r2,r0 (See the testDatapath to see how to drive the datapath for this function)
|
when add_reg | sub_reg | and_reg | or_reg | xor_reg =>
|
when add_reg | sub_reg | and_reg | or_reg | xor_reg =>
|
MuxDp <= muxPos(fromAlu);
|
MuxDp <= fromAlu;
|
MuxRegDp <= muxRegPos(fromRegFileA);
|
MuxRegDp <= muxRegPos(fromRegFileA);
|
DpRegFileReadAddrA <= Num2reg(conv_integer(UNSIGNED(operand_reg1))); -- Read first operand
|
DpRegFileReadAddrA <= Num2reg(conv_integer(UNSIGNED(operand_reg1))); -- Read first operand
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg2))); -- Read second operand
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg2))); -- Read second operand
|
DpRegFileReadEnA <= '1';
|
DpRegFileReadEnA <= '1';
|
DpRegFileReadEnB <= '1';
|
DpRegFileReadEnB <= '1';
|
| Line 230... |
Line 230... |
DpAluOp <= opcode2AluOp(opcodeIR); -- Select the alu operation from the operand
|
DpAluOp <= opcode2AluOp(opcodeIR); -- Select the alu operation from the operand
|
nextExState <= writeRegister;
|
nextExState <= writeRegister;
|
|
|
-- MOV r0,10d (See the testDatapath to see how to drive the datapath for this function)
|
-- MOV r0,10d (See the testDatapath to see how to drive the datapath for this function)
|
when mov_val =>
|
when mov_val =>
|
MuxDp <= muxPos(fromImediate);
|
MuxDp <= fromImediate;
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
ImmDp <= "0000000000" & operand_imm; -- & is used to concatenate signals
|
ImmDp <= "0000000000" & operand_imm; -- & is used to concatenate signals
|
nextExState <= writeRegister;
|
nextExState <= writeRegister;
|
|
|
-- ADD r3,2 (r2 <= r2+2) (See the testDatapath to see how to drive the datapath for this function)
|
-- ADD r3,2 (r2 <= r2+2) (See the testDatapath to see how to drive the datapath for this function)
|
when add_val | sub_val | and_val | or_val | xor_val =>
|
when add_val | sub_val | and_val | or_val | xor_val =>
|
MuxDp <= muxPos(fromAlu);
|
MuxDp <= fromAlu;
|
MuxRegDp <= muxRegPos(fromImediate);
|
MuxRegDp <= muxRegPos(fromImediate);
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileWriteAddr <= Num2reg(conv_integer(UNSIGNED(operand_reg1)));
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg1))); -- Read first operand
|
DpRegFileReadAddrB <= Num2reg(conv_integer(UNSIGNED(operand_reg1))); -- Read first operand
|
DpRegFileReadEnB <= '1';
|
DpRegFileReadEnB <= '1';
|
ImmDp <= "0000000000" & operand_imm; -- & is used to concatenate signals
|
ImmDp <= "0000000000" & operand_imm; -- & is used to concatenate signals
|
