Add alu_control version v0.1

3 files changed, 109 insertions, 0 deletions

diff --git a/alu_control/v0.1/Makefile b/alu_control/v0.1/Makefile
new file mode 100644
index 0000000..ce574d3
--- /dev/null
+++ b/alu_control/v0.1/Makefile
@@ -0,0 +1,9 @@
+make:
+	iverilog -g2005-sv -o alu_control alu_control.v
+	iverilog -g2005-sv -o test_alu_control test_alu_control.v alu_control.v
+
+test:
+	vvp test_alu_control
+
+wave:
+	gtkwave test_alu_control.vcd
diff --git a/alu_control/v0.1/alu_control.v b/alu_control/v0.1/alu_control.v
new file mode 100644
index 0000000..fb6a743
--- /dev/null
+++ b/alu_control/v0.1/alu_control.v
@@ -0,0 +1,26 @@
+module alu_control(
+    input [1:0] alu_op,
+    input [3:0] opcode,
+    output reg [2:0] alu_cnt
+    
+);
+
+wire [5:0]alu_control_in;
+assign alu_control_in = {alu_op, opcode};
+
+always @(alu_control_in)
+casex (alu_control_in)
+   6'b10xxxx: alu_cnt=3'b000;
+   6'b01xxxx: alu_cnt=3'b001;
+   6'b000010: alu_cnt=3'b000;
+   6'b000011: alu_cnt=3'b001;
+   6'b000100: alu_cnt=3'b010;
+   6'b000101: alu_cnt=3'b011;
+   6'b000110: alu_cnt=3'b100;
+   6'b000111: alu_cnt=3'b101;
+   6'b001000: alu_cnt=3'b110;
+   6'b001001: alu_cnt=3'b111;
+  default: alu_cnt=3'b000;
+endcase
+
+endmodule
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diff --git a/alu_control/v0.1/test_alu_control.v b/alu_control/v0.1/test_alu_control.v
new file mode 100644
index 0000000..878744a
--- /dev/null
+++ b/alu_control/v0.1/test_alu_control.v
@@ -0,0 +1,74 @@
+`timescale 1ns/1ps
+
+module test_alu_control;
+
+reg [1:0]alu_op;
+reg [3:0]opcode;
+reg [2:0]alu_cnt;
+
+alu_control uut(
+    .alu_op(alu_op),
+    .opcode(opcode),
+    .alu_cnt(alu_cnt)
+);
+
+initial begin
+    $display("test alu control");
+    $dumpfile("test_alu_control.vcd");
+    $dumpvars(0,test_alu_control);
+
+    #1
+    alu_op = 0;
+    opcode = 0;
+
+    #10
+
+    opcode = 1;
+
+    #10
+
+    opcode = 2;
+
+    #10
+
+    opcode = 3;
+
+    #10
+
+    opcode = 4;
+
+    #10
+
+    opcode = 5;
+
+    #10
+
+    opcode = 6;
+
+    #10
+
+    opcode = 7;
+
+    #10
+    alu_op = 1;
+    opcode = 0;
+
+    #10
+    alu_op = 2;
+    opcode = 1;
+
+    #10
+    alu_op = 3;
+
+    #10
+    alu_op = 3;
+
+
+end
+
+
+initial begin 
+    $monitor("At time %t",$time);
+end
+
+endmodule
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