diff --git a/rtl/serv_alu.v b/rtl/serv_alu.v
index e48812b..d6c2176 100644
--- a/rtl/serv_alu.v
+++ b/rtl/serv_alu.v
@@ -11,7 +11,7 @@ module serv_alu
    input wire 	    i_cnt_done,
    input wire 	    i_sub,
    input wire [1:0] i_bool_op,
-   input wire 	    i_cmp_sel,
+   input wire 	    i_cmp_eq,
    input wire 	    i_cmp_uns,
    output wire 	    o_cmp,
    input wire 	    i_shamt_en,
@@ -98,7 +98,7 @@ module serv_alu
       .o_q   (result_lt));
 
    assign plus_1 = i_en & !en_r;
-   assign o_cmp = (i_cmp_sel == ALU_CMP_EQ) ? result_eq : result_lt;
+   assign o_cmp = i_cmp_eq ? result_eq : result_lt;
 
    localparam [15:0] BOOL_LUT = 16'h8E96;//And, Or, =, xor
    wire result_bool = BOOL_LUT[{i_bool_op, i_rs1, i_op_b}];
diff --git a/rtl/serv_decode.v b/rtl/serv_decode.v
index 28dbf92..8fbb819 100644
--- a/rtl/serv_decode.v
+++ b/rtl/serv_decode.v
@@ -33,7 +33,7 @@ module serv_decode
    output wire 	     o_alu_init,
    output wire 	     o_alu_sub,
    output wire [1:0] o_alu_bool_op,
-   output reg 	     o_alu_cmp_sel,
+   output wire 	     o_alu_cmp_eq,
    output reg 	     o_alu_cmp_uns,
    input wire 	     i_alu_cmp,
    output wire 	     o_alu_shamt_en,
@@ -161,14 +161,10 @@ module serv_decode
    assign o_csr_mcause_en   = csr_en                &  op21 & !op20;
 
 
-   always @(o_funct3, o_rf_rs1_addr, o_ctrl_trap, o_ctrl_mret) begin
-      casez (o_funct3)
-        3'b00?  : o_alu_cmp_sel = ALU_CMP_EQ;
-        3'b01?  : o_alu_cmp_sel = ALU_CMP_LT;
-        3'b1??  : o_alu_cmp_sel = ALU_CMP_LT;
-        default : o_alu_cmp_sel = 1'bx;
-      endcase
 
+   assign o_alu_cmp_eq = o_funct3[2:1] == 2'b00;
+
+   always @(o_funct3, o_rf_rs1_addr, o_ctrl_trap, o_ctrl_mret) begin
       casez (o_funct3)
         3'b00?  : o_alu_cmp_uns = 1'b0;
         3'b010  : o_alu_cmp_uns = 1'b0;
diff --git a/rtl/serv_params.vh b/rtl/serv_params.vh
index 8d49c9c..3f74c5e 100644
--- a/rtl/serv_params.vh
+++ b/rtl/serv_params.vh
@@ -8,20 +8,6 @@ localparam[1:0]
   ALU_RESULT_LT   = 2'd2,
   ALU_RESULT_BOOL = 2'd3;
 
-localparam [0:0]
-  ALU_CMP_LT = 1'b0,
-  ALU_CMP_EQ = 1'b1;
-
-/*
- source
- ADD, SUB
- SL,SR
- SLT
- XOR,
- OR
- AND
-*/
-
 localparam [1:0]
   CSR_SOURCE_CSR = 2'b00,
   CSR_SOURCE_EXT = 2'b01,
diff --git a/rtl/serv_top.v b/rtl/serv_top.v
index 2e61c89..d424845 100644
--- a/rtl/serv_top.v
+++ b/rtl/serv_top.v
@@ -85,7 +85,7 @@ module serv_top
    wire          alu_init;
    wire          alu_sub;
    wire [1:0] 	 alu_bool_op;
-   wire          alu_cmp_sel;
+   wire          alu_cmp_eq;
    wire          alu_cmp_uns;
    wire          alu_cmp;
    wire          alu_shamt_en;
@@ -161,7 +161,7 @@ module serv_top
       .o_alu_init     (alu_init),
       .o_alu_sub      (alu_sub),
       .o_alu_bool_op  (alu_bool_op),
-      .o_alu_cmp_sel  (alu_cmp_sel),
+      .o_alu_cmp_eq   (alu_cmp_eq),
       .o_alu_cmp_uns  (alu_cmp_uns),
       .i_alu_cmp      (alu_cmp),
       .o_alu_shamt_en (alu_shamt_en),
@@ -260,7 +260,7 @@ module serv_top
       .i_cnt_done (cnt_done),
       .i_sub      (alu_sub),
       .i_bool_op  (alu_bool_op),
-      .i_cmp_sel  (alu_cmp_sel),
+      .i_cmp_eq   (alu_cmp_eq),
       .i_cmp_uns  (alu_cmp_uns),
       .o_cmp      (alu_cmp),
       .i_shamt_en (alu_shamt_en),