[Add] add forwarding

2023-05-22 13:34:31 +08:00
parent 029a8823f4
commit bf41b61af0
9 changed files with 205 additions and 41 deletions
--- a/lacpu/rtl/cpu/regfile.v
+++ b/lacpu/rtl/cpu/regfile.v
@@ -19,9 +19,13 @@ module regfile(
    end

    //READ OUT 1
-    assign rdata1 = (raddr1==5'b0) ? 32'b0 : rf[raddr1];
+    assign rdata1 = (raddr1==5'b0 ) ? 32'b0 : 
+                    (raddr1==waddr) ? wdata :
+                                      rf[raddr1];

    //READ OUT 2
-    assign rdata2 = (raddr2==5'b0) ? 32'b0 : rf[raddr2];
+    assign rdata2 = (raddr2==5'b0 ) ? 32'b0 : 
+                    (raddr2==waddr) ? wdata :
+                                      rf[raddr2];

 endmodule