1 files changed, 20 insertions, 0 deletions
diff --git a/verilog/immediate.v b/verilog/immediate.v
new file mode 100644
index 0000000..37111da
--- /dev/null
+++ b/verilog/immediate.v
@@ -0,0 +1,20 @@
+`default_nettype none
+`timescale 1ns/1ps
+
+module immediate
+(
+	input wire [31:7] instr,
+	input wire i,u,j,b,
+	output wire [31:0] imm
+);
+
+// Note, can get rid of S signal if needed
+assign imm[31] = instr[31];
+assign imm[30:20] = u ? instr[30:20] : {11{instr[31]}};
+assign imm[19:12] = (u|j) ? instr[19:12] : {8{instr[31]}};
+assign imm[11] = ~u & (b ? instr[7] : (j ? instr[20] : instr[31]));
+assign imm[10:5] = {6{~u}} & instr[30:25];
+assign imm[4:1] = {4{~u}} & (i|j ? instr[24:21] : instr[11:8]);
+assign imm[0] = ~(u|j|b) & (i ? instr[20] : instr[7]);
+
+endmodule