From: rs <>
Date: Thu, 25 Sep 2025 19:22:20 +0000 (-0500)
Subject: Add performance testing experiment
X-Git-Url: https://git.the-white-hart.net/?a=commitdiff_plain;h=e884ae24582206bd7d9ffdf4a63e9a1c26c5a6f5;p=vhdl

Add performance testing experiment
---

diff --git a/projects/experimental/perf.vhd b/projects/experimental/perf.vhd
new file mode 100644
index 0000000..4003c1a
--- /dev/null
+++ b/projects/experimental/perf.vhd
@@ -0,0 +1,45 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+
+entity perf is
+	port (
+		clk: in  std_logic;
+		a:   in  std_logic_vector(32 downto 0);
+		b:   in  std_logic_vector(32 downto 0);
+		x:   in  std_logic_vector(32 downto 0);
+		c:   out std_logic_vector(32 downto 0)
+	);
+end perf;
+
+
+architecture behavioral of perf is
+
+	signal a_reg: std_logic_vector(32 downto 0);
+	signal b_reg: std_logic_vector(32 downto 0);
+	signal x_reg: std_logic_vector(32 downto 0);
+	signal c_reg: std_logic_vector(32 downto 0);
+
+begin
+
+	process (clk, a, b)
+	begin
+		if rising_edge(clk) then
+			a_reg <= a;
+			b_reg <= b;
+			x_reg <= x;
+
+			-- Minimum period: 1.903ns (Maximum Frequency: 525.486MHz)
+			--c_reg <= a_reg and b_reg;
+
+			-- Minimum period: 4.603ns (Maximum Frequency: 217.273MHz)
+			--c_reg <= std_logic_vector(unsigned(a_reg) + unsigned(b_reg));
+
+			-- Minimum period: 5.641ns (Maximum Frequency: 177.289MHz)
+			c_reg <= std_logic_vector(unsigned(a_reg) + unsigned(b_reg)) and x_reg;
+		end if;
+	end process;
+	c <= c_reg;
+
+end behavioral;