feat: initial benchark support for neo

examples/benchmark/src/main.rs

-use chip_ahoyto::{chip8::Chip8, util::read_file};
+use chip_ahoyto::{chip8::Chip8, chip8_neo::Chip8Neo, util::read_file};
 use time::Instant;
 
-const CYCLE_COUNT: u64 = 1_000_000_000;
+const CYCLE_COUNT: u64 = 5_000_000_000;
 
-fn main() {
+fn benchmark_chip8() {
     let rom_path = "./resources/pong.ch8";
     let rom = read_file(rom_path);
 
@@ -15,7 +15,32 @@ fn main() {
 
     let cycles = CYCLE_COUNT;
 
-    println!("Running {} cycles for {}", cycles, rom_path);
+    println!("[Chip8] Running {} cycles for {}", cycles, rom_path);
+
+    for _ in 0..CYCLE_COUNT {
+        chip8.tick();
+    }
+
+    let duration_s = instant.elapsed().as_seconds_f32();
+    let cycles_second = cycles as f32 / duration_s;
+    let mega_second = cycles_second / 1000.0 / 1000.0;
+
+    println!(
+        "[Chip8] Took {} seconds or {:.2} MHz CPU",
+        duration_s, mega_second
+    );
+}
+
+fn benchmark_chip8_neo() {
+    let rom_path = "./resources/pong.ch8";
+
+    let mut chip8 = Chip8Neo::new();
+
+    let instant = Instant::now();
+
+    let cycles = CYCLE_COUNT;
+
+    println!("[Chip8Neo] Running {} cycles for {}", cycles, rom_path);
 
     for _ in 0..CYCLE_COUNT {
         chip8.tick();
@@ -25,5 +50,13 @@ fn main() {
     let cycles_second = cycles as f32 / duration_s;
     let mega_second = cycles_second / 1000.0 / 1000.0;
 
-    println!("Took {} seconds or {:.2} MHz CPU", duration_s, mega_second);
+    println!(
+        "[Chip8Neo] Took {} seconds or {:.2} MHz CPU",
+        duration_s, mega_second
+    );
+}
+
+fn main() {
+    benchmark_chip8();
+    benchmark_chip8_neo();
 }

src/chip8_neo.rs

@@ -4,6 +4,10 @@ pub const RAM_SIZE: usize = 4096;
 pub const STACK_SIZE: usize = 16;
 pub const REGISTERS_SIZE: usize = 16;
 
+/// The starting address for the ROM loading, should be
+/// the initial PC position.
+const ROM_START: usize = 0x200;
+
 pub struct Chip8Neo {
     ram: [u8; RAM_SIZE],
     vram: [u8; DISPLAY_WIDTH * DISPLAY_HEIGHT],
@@ -15,3 +19,26 @@ pub struct Chip8Neo {
     dt: u8,
     st: u8,
 }
+
+#[cfg_attr(feature = "web", wasm_bindgen)]
+impl Chip8Neo {
+    #[cfg_attr(feature = "web", wasm_bindgen(constructor))]
+    pub fn new() -> Chip8Neo {
+        let chip8 = Chip8Neo {
+            ram: [0u8; RAM_SIZE],
+            vram: [0u8; DISPLAY_WIDTH * DISPLAY_HEIGHT],
+            stack: [0u16; STACK_SIZE],
+            registers: [0u8; REGISTERS_SIZE],
+            pc: ROM_START as u16,
+            i: 0x0,
+            sp: 0x0,
+            dt: 0x0,
+            st: 0x0,
+        };
+        chip8
+    }
+
+    pub fn tick(&mut self) {
+        self.pc += 0x2;
+    }
+}