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data path: replace instruction register with D-latch

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Yuri Tatishchev 2024-11-17 02:38:11 -08:00
parent 9e6d1d5df2
commit 5d64b65212
Signed by: CaZzzer
GPG Key ID: E0EBF441EA424369
3 changed files with 19 additions and 9 deletions
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3
control_unit.v
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@ -215,12 +215,11 @@ always @ (state) begin
// loaded in previous state, set to 0
C[`pc_load] = 1'b0;
C[`ir_load] = 1'b0;
C[`sp_load] = 1'b0;
C[`reg_r] = 1'b0;
C[`reg_w] = 1'b0;
// load now
// TODO: ir_load should not be 1 here
C[`ir_load] = 1'b1;
read = 1'b1;
write = 1'b0;
// selections

2
data_path.v
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@ -113,7 +113,7 @@ buf addr_buf [25:0] (addr, ir[25:0]);
// Instruction Register input
// Instruction Register
REG32 ir_inst(.Q(ir), .D(DATA_IN), .LOAD(ir_load), .CLK(CLK), .RESET(RST));
D_LATCH32 ir_inst(.Q(ir), .D(DATA_IN), .LOAD(ir_load), .RESET(RST));
// Register File Input
wire [31:0] r1_sel, wa_sel, wd_sel;

23
logic.v
View File

@ -13,6 +13,23 @@
// 1.0 Sep 02, 2014 Kaushik Patra kpatra@sjsu.edu Initial creation
//------------------------------------------------------------------------------------------
//
// 32-bit D latch
module D_LATCH32(Q, D, LOAD, RESET);
output [31:0] Q;
input LOAD;
input [31:0] D;
input RESET;
genvar i;
generate
for (i = 0; i < 32; i = i + 1) begin : d_latch_gen
D_LATCH d_latch_inst(Q[i], _, D[i], LOAD, 1'b1, RESET);
end
endgenerate
endmodule
// 64-bit two's complement
module TWOSCOMP64(Y,A);
//output list
@ -56,7 +73,6 @@ generate
REG1 reg_inst(.Q(Q[i]), .Qbar(qbar[i]), .D(D[i]), .L(LOAD), .C(CLK), .nP(RESET), .nR(1'b1));
end
endgenerate
endmodule
// 32-bit registere +ve edge, Reset on RESET=0
@ -73,7 +89,6 @@ generate
REG1 r(Q[i], _, D[i], LOAD, CLK, 1'b1, RESET);
end
endgenerate
endmodule
// 1 bit register +ve edge,
@ -164,7 +179,6 @@ generate
and msb1(D[i + 16], I[4], half[i]);
end
endgenerate
endmodule
// 4x16 Line decoder
@ -187,8 +201,6 @@ generate
and msb1(D[i + 8], I[3], half[i]);
end
endgenerate
endmodule
// 3x8 Line decoder
@ -211,7 +223,6 @@ generate
and msb1(D[i + 4], I[2], half[i]);
end
endgenerate
endmodule
// 2x4 Line decoder