Replace dibble dabble algorithm with variant that tests after the add.

This makes it really easy to support odd bases.

1 files changed, 5 insertions, 4 deletions

diff --git a/ntoa.sv b/ntoa.sv
index 2a5c1ef..f8e9f43 100644
--- a/ntoa.sv
+++ b/ntoa.sv
@@ -1,5 +1,6 @@
 module ntoa
     #(  BITS = 8
+    ,   BASE = 10
     )
     (   input   bit clk
     ,   input   bit reset
@@ -19,7 +20,7 @@ bit [b2b.DIGITS-1:0][b2b.BASE_BITS-1:0] bcd_data;
 
 bin2bcd
     #(  .BITS(BITS)
-    ,   .BASE(10)
+    ,   .BASE(BASE)
     ) b2b
     (   .clk(clk)
     ,   .reset(reset)
@@ -50,10 +51,10 @@ always_ff @(posedge clk) begin
             // verilator lint_off WIDTH
             work = b2b.DIGITS;
             // verilator lint_on WIDTH
-            for (int i = 0; i < b2b.DIGITS - 1; i = i + 1) begin
+            for (int i = 0; i < b2b.DIGITS - 1; ++i) begin
                 if (bcd_b_data[b2b.DIGITS-1] != 0) break;
                 bcd_b_data = { bcd_b_data[b2b.DIGITS-2:0], {b2b.BASE_BITS{1'b0}} };
-                work = work - 1;
+                --work;
             end
         end
 
@@ -68,7 +69,7 @@ always_ff @(posedge clk) begin
                     a_data = "a" + bcd_b_data[b2b.DIGITS-1] - 10;
                 // verilator lint_off WIDTH
                 bcd_b_data = { bcd_b_data[b2b.DIGITS-2:0], {b2b.BASE_BITS{1'b0}} };
-                work = work - 1;
+                --work;
             end else begin
                 a_valid = 1;
                 a_data = ",";