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Diffstat (limited to 'verilog/alu/v6/alu6.v')
-rw-r--r-- | verilog/alu/v6/alu6.v | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/verilog/alu/v6/alu6.v b/verilog/alu/v6/alu6.v new file mode 100644 index 0000000..2f0f00c --- /dev/null +++ b/verilog/alu/v6/alu6.v @@ -0,0 +1,30 @@ +`default_nettype none +`timescale 1us/1ns + +`include "aluOp.vh" + +module alu6 +( +input wire [31:0] alu_in_1, +input wire[31:0] alu_in_2, +input wire[3:0] alu_op_i, +output wire[31:0] alu_output +); + +wire [31:0] complement2 = ~alu_in_2 + 1'b1; +wire [31:0] sum = alu_in_1 + (alu_op_i[3] | (alu_op_i[1] & ~alu_op_i[0]) == 1'b1 ? complement2 : alu_in_2); +wire [31:0] right = alu_in_1 >> alu_in_2[5:0] | (alu_op_i[3] == 0 ? 32'b0 : + (32'hFFFFFFFF << (alu_in_2[31] == 1'b1 ? 5'b0 : {~alu_in_2[4] , ~alu_in_2[3], ~alu_in_2[2], ~alu_in_2[1], ~alu_in_2[0]}))); + +assign alu_output = + alu_op_i[2:0] == `ADDSUB ? sum : + alu_op_i[2:0] == `XOR ? alu_in_1 ^ alu_in_2 : + alu_op_i[2:0] == `OR ? alu_in_1 | alu_in_2 : + alu_op_i[2:0] == `AND ? alu_in_1 & alu_in_2 : + alu_op_i[2:0] == `SLL ? alu_in_2[6] == 1 ? 32'b0 : alu_in_1 << alu_in_2[5:0] : + alu_op_i[2:0] == `SR ? right : + alu_op_i[2:0] == `SLT ? {31'b0, sum[31]} : + alu_op_i[2:0] == `SLTU ? (alu_in_1 < alu_in_2 ? 32'b1 : 32'b0) : + 32'b0; +endmodule + |