ALU unit critical path optimization

2021-09-07 23:54:10 -07:00
parent c06efbf480
commit aeeb3ca616
6 changed files with 107 additions and 88 deletions
--- a/hw/rtl/VX_decode.v
+++ b/hw/rtl/VX_decode.v
@@ -201,10 +201,10 @@ module VX_decode  #(
                    op_type = `INST_OP_BITS'(func3[1:0]);
                    use_rd  = 1;
                    use_imm = func3[2]; 
-                    imm     = 32'(u_12); // addr
+                    imm[`CSR_ADDR_BITS-1:0] = u_12; // addr
                    `USED_IREG (rd);
                    if (func3[2]) begin
-                        rs1_r = `NR_BITS'(rs1); // imm
+                        imm[`CSR_ADDR_BITS +: `NRI_BITS] = rs1; // imm
                    end else begin
                        `USED_IREG (rs1);
                    end