vme_funct_match: fix the function priority encoder.

In the previous code, a function that is selected but not supported for the AM was masking any following function.

vme_funct_match: fix the function priority encoder.
In the previous code, a function that is selected but not supported for the AM was masking any following function.
b86ede3d · Tristan Gingold · 8b9e164d · b86ede3d
Commit b86ede3d authored Apr 15, 2020 by Tristan Gingold
Hide whitespace changes
Inline Side-by-side

Showing with 4 additions and 2 deletions

vme_funct_match.vhd hdl/rtl/vme_funct_match.vhd +4 -2

No files found.
--- a/hdl/rtl/vme_funct_match.vhd
+++ b/hdl/rtl/vme_funct_match.vhd
@@ -95,9 +95,11 @@ begin
      else
        s_decode_start_1 <= '1';
        for i in ader_i'range loop
-          if s_function(i) = '1' then
+          if s_function(i) = '1' and s_ader_am_valid(i) = '1' then
+            --  The function can be used when both it is selected and the AM
+            --  is supported.
            s_function_sel <= i;
-            s_function_sel_valid <= s_ader_am_valid(i);
+            s_function_sel_valid <= '1';
            exit;
          end if;
        end loop;