2 files changed, 126 insertions, 0 deletions
diff --git a/testsuite/issues/pr171/bootrom.vhdl b/testsuite/issues/pr171/bootrom.vhdl
new file mode 100644
index 0000000..4943405
--- /dev/null
+++ b/testsuite/issues/pr171/bootrom.vhdl
@@ -0,0 +1,118 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+package interface is
+	constant maxAddrBitBRAMLimit : integer := 32;
+	constant minAddrBit : integer := 2;
+	constant wordSize : integer := 32;
+	type ToROM is record
+		memAWriteEnable : std_logic;
+		memAAddr : std_logic_vector(maxAddrBitBRAMLimit downto minAddrBit);
+		memAWrite : std_logic_vector(wordSize-1 downto 0);
+		memBWriteEnable : std_logic;
+		memBAddr : std_logic_vector(maxAddrBitBRAMLimit downto minAddrBit);
+		memBWrite : std_logic_vector(wordSize-1 downto 0);
+	end record;
+	type FromROM is record
+		memARead : std_logic_vector(wordSize-1 downto 0);
+		memBRead : std_logic_vector(wordSize-1 downto 0);
+	end record;
+
+end package;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+library work;
+use work.interface.all;
+
+entity BootROM is
+generic
+	(
+		maxAddrBitBRAM : integer := 7
+	);
+port (
+	clk : in std_logic;
+	areset : in std_logic := '0';
+	from_sys : in ToROM;
+	to_sys : out FromROM
+);
+end entity;
+
+architecture arch of BootROM is
+
+type ram_type is array(natural range 0 to ((2**(maxAddrBitBRAM+1))/4)-1) of std_logic_vector(wordSize-1 downto 0);
+
+shared variable ram : ram_type :=
+(
+     0 => x"84808080",
+     1 => x"8c0b8480",
+     2 => x"8081e004",
+     3 => x"00848080",
+     4 => x"808c04ff",
+     5 => x"0d800404",
+     6 => x"40000017",
+     7 => x"00000000",
+     8 => x"0b83ffe0",
+     9 => x"80080b83",
+    10 => x"ffe08408",
+    11 => x"0b83ffe0",
+    12 => x"88088480",
+    13 => x"80809808",
+    14 => x"2d0b83ff",
+    15 => x"e0880c0b",
+    16 => x"83ffe084",
+    17 => x"0c0b83ff",
+    18 => x"e0800c04",
+    19 => x"00000000",
+    20 => x"00000000",
+    21 => x"00000000",
+    22 => x"00000000",
+    23 => x"00000000",
+    24 => x"71fd0608",
+    25 => x"72830609",
+    26 => x"81058205",
+    27 => x"832b2a83",
+    28 => x"ffff0652",
+    29 => x"0471fc06",
+    30 => x"08728306",
+    31 => x"09810583",
+	others => x"00000000"
+);
+
+attribute no_rw_check: boolean;
+attribute no_rw_check of ram : variable is true;
+
+begin
+
+process (clk)
+begin
+	if (clk'event and clk = '1') then
+		if (from_sys.memAWriteEnable = '1') and (from_sys.memBWriteEnable = '1') and (from_sys.memAAddr=from_sys.memBAddr) and (from_sys.memAWrite/=from_sys.memBWrite) then
+			report "write collision" severity failure;
+		end if;
+	
+		if (from_sys.memAWriteEnable = '1') then
+			ram(to_integer(unsigned(from_sys.memAAddr(maxAddrBitBRAM downto 2)))) := from_sys.memAWrite;
+			to_sys.memARead <= from_sys.memAWrite;
+		else
+			to_sys.memARead <= ram(to_integer(unsigned(from_sys.memAAddr(maxAddrBitBRAM downto 2))));
+		end if;
+	end if;
+end process;
+
+process (clk)
+begin
+	if (clk'event and clk = '1') then
+		if (from_sys.memBWriteEnable = '1') then
+			ram(to_integer(unsigned(from_sys.memBAddr(maxAddrBitBRAM downto 2)))) := from_sys.memBWrite;
+			to_sys.memBRead <= from_sys.memBWrite;
+		else
+			to_sys.memBRead <= ram(to_integer(unsigned(from_sys.memBAddr(maxAddrBitBRAM downto 2))));
+		end if;
+	end if;
+end process;
+
+end arch;
diff --git a/testsuite/issues/pr171/testsuite.sh b/testsuite/issues/pr171/testsuite.sh
new file mode 100755
index 0000000..447a7f3
--- /dev/null
+++ b/testsuite/issues/pr171/testsuite.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+topdir=../..
+. $topdir/testenv.sh
+
+run_yosys -q -p "ghdl bootrom.vhdl -e bootrom; memory_bram -rules +/ecp5/brams.txt"
+
+echo OK