1 files changed, 25 insertions, 0 deletions
diff --git a/rtl/src/alu_a_src_mux.v b/rtl/src/alu_a_src_mux.v
new file mode 100644
index 0000000..fef701b
--- /dev/null
+++ b/rtl/src/alu_a_src_mux.v
@@ -0,0 +1,25 @@
+module alu_a_src_mux (
+  input [31:0] src_pc, 
+  input [31:0] src_pc_buf,
+  input [31:0] src_rd1,
+  input [31:0] src_rd1_buf,
+
+  input [2:0] alu_a_src,
+
+  output reg [31:0] alu_a
+);
+
+`include "include/consts.vh"
+
+always @(*) begin
+  case (alu_a_src)
+    ALU_A_SRC_PC:      alu_a = src_pc;
+    ALU_A_SRC_PC_BUF:  alu_a = src_pc_buf;
+    ALU_A_SRC_RD1:     alu_a = src_rd1;
+    ALU_A_SRC_RD1_BUF: alu_a = src_rd1_buf;
+    ALU_A_SRC_0:       alu_a = 32'b0;
+    default:           alu_a = 32'b0;
+  endcase
+end
+
+endmodule