work around small ghdl synthesis bug

marph91 · Feb 28, 2021 · eae0c01 · eae0c01
1 parent b3e9a7d
commit eae0c01
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/window_ctrl/line_buffer.vhd b/src/window_ctrl/line_buffer.vhd
@@ -73,7 +73,10 @@ begin
 
  if (rising_edge(isl_clk)) then
  if (isl_valid = '1') then
- if (usig_addr_cnt /= C_BRAM_SIZE - 2) then
+ -- type cast to avoid ghdl synthesis error:
+ -- error: synth_static_dyadic_predefined: unhandled IIR_PREDEFINED_IEEE_NUMERIC_STD_NE_UNS_NAT
+ -- TODO: report bug
+ if (to_integer(usig_addr_cnt) /= C_BRAM_SIZE - 2) then
  usig_addr_cnt <= usig_addr_cnt + 1;
  else
  usig_addr_cnt <= (others => '0');