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[rtl/cpu] minor edits

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stnolting 2020-10-17 11:22:10 +02:00
parent 78bee91b13
commit d4842a0146
1 changed files with 4 additions and 3 deletions
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7
rtl/core/neorv32_cpu_control.vhd
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@ -131,6 +131,7 @@ architecture neorv32_cpu_control_rtl of neorv32_cpu_control is
--
w_pnt : std_ulogic_vector(index_size_f(ipb_entries_c) downto 0); -- write pointer
r_pnt : std_ulogic_vector(index_size_f(ipb_entries_c) downto 0); -- read pointer
match : std_ulogic;
empty : std_ulogic;
full : std_ulogic;
--
@ -392,9 +393,9 @@ begin
ipb.rdata <= ipb.data(to_integer(unsigned(ipb.r_pnt(ipb.r_pnt'left-1 downto 0))));
-- status --
ipb.full <= '1' when (ipb.r_pnt(ipb.r_pnt'left) /= ipb.w_pnt(ipb.w_pnt'left)) and (ipb.r_pnt(ipb.r_pnt'left-1 downto 0) = ipb.w_pnt(ipb.w_pnt'left-1 downto 0)) else '0';
ipb.empty <= '1' when (ipb.r_pnt(ipb.r_pnt'left) = ipb.w_pnt(ipb.w_pnt'left)) and (ipb.r_pnt(ipb.r_pnt'left-1 downto 0) = ipb.w_pnt(ipb.w_pnt'left-1 downto 0)) else '0';
ipb.match <= '1' when (ipb.r_pnt(ipb.r_pnt'left-1 downto 0) = ipb.w_pnt(ipb.w_pnt'left-1 downto 0)) else '0';
ipb.full <= '1' when (ipb.r_pnt(ipb.r_pnt'left) /= ipb.w_pnt(ipb.w_pnt'left)) and (ipb.match = '1') else '0';
ipb.empty <= '1' when (ipb.r_pnt(ipb.r_pnt'left) = ipb.w_pnt(ipb.w_pnt'left)) and (ipb.match = '1') else '0';
ipb.free <= not ipb.full;
ipb.avail <= not ipb.empty;