testsuite/mem02: add more tests for RAM inference.

1 files changed, 31 insertions, 0 deletions

diff --git a/testsuite/synth/mem02/dpram2.vhdl b/testsuite/synth/mem02/dpram2.vhdl
new file mode 100644
index 000000000..d7e98d6b7
--- /dev/null
+++ b/testsuite/synth/mem02/dpram2.vhdl
@@ -0,0 +1,31 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity dpram1 is
+  port (raddr : std_logic_vector (3 downto 0);
+        rdat : out std_logic_vector (7 downto 0);
+        waddr : std_logic_vector (3 downto 0);
+        wdat : std_logic_vector (7 downto 0);
+        clk : std_logic);
+end dpram1;
+
+architecture behav of dpram1 is
+  subtype memtype is std_logic_vector (16 * 8 - 1 downto 0);
+  signal mem : memtype;
+begin
+  process (clk)
+    variable ra : natural;
+    variable wa : natural;
+    variable rlo, rhi : natural;
+  begin
+    if rising_edge (clk) then
+      ra := to_integer(unsigned (raddr));
+      rlo := ra * 8;
+      rhi := rlo + 7;
+      rdat <= mem (rhi downto rlo);
+      wa := to_integer(unsigned (waddr));
+      mem (wa * 8 + 7 downto wa * 8) <= wdat;
+    end if;
+  end process;
+end behav;