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nora 2021-05-16 13:06:20 +02:00
parent 9f79bc067d
commit 88b30e4fa5
3 changed files with 70 additions and 71 deletions
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78
src/interpreter.rs → src/interpreter/mod.rs
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@ -1,6 +1,11 @@
// this should be read before reading the code
// http://devernay.free.fr/hacks/chip8/C8TECH10.HTM
// https://en.wikipedia.org/wiki/CHIP-8
//! # A CHIP-8 interpreter in Rust
//! this should be read before reading the code
//! http://devernay.free.fr/hacks/chip8/C8TECH10.HTM
//! https://en.wikipedia.org/wiki/CHIP-8
#[cfg(test)]
mod test;
use rand::Rng;
#[derive(Debug, Clone)]
@ -276,69 +281,4 @@ fn extract_0xii(value: u16) -> (usize, u8) {
fn extract_0nnn(value: u16) -> u16 {
value & 0xFFF
}
#[cfg(test)]
mod test {
use crate::interpreter::{Emulator, execute};
use std::sync::atomic::Ordering::AcqRel;
#[test]
fn instructions_0_1_2() {
let mut em = Emulator::default();
em.pc = 10;
execute(0x20FF, &mut em); // call 0FF
assert_eq!(em.pc + 1, 0x0FF);
assert_eq!(em.sp, 1);
em.pc = 0x0FF;
execute(0x00EE, &mut em); // return
assert_eq!(em.sp, 0);
assert_eq!(em.pc, 10);
execute(0x10AB, &mut em); // jmp to 0AB
assert_eq!(em.pc + 1, 0x0AB);
}
#[test]
fn instructions_3_4_5() {
let mut em = Emulator::default();
em.reg[0] = 0xF2;
execute(0x30F2, &mut em);
assert_eq!(em.pc, 1);
execute(0x40F3, &mut em);
assert_eq!(em.pc, 2);
execute(0x40F2, &mut em);
assert_eq!(em.pc, 2);
em.reg[1] = 0xF2;
execute(0x5010, &mut em);
assert_eq!(em.pc, 3);
}
#[test]
fn instructions_6_7() {
let mut em = Emulator::default();
execute(0x60AB, &mut em);
assert_eq!(em.reg[0], 0xAB);
execute(0x69FF, &mut em);
assert_eq!(em.reg[9], 0xFF);
execute(0x7001, &mut em);
assert_eq!(em.reg[0], 0xAC);
}
#[test]
fn instruction_fx33_conversion() {
let mut em = Emulator::default();
em.reg[0] = 255;
em.reg[1] = 99;
em.reg[2] = 1;
let instruction1 = 0xF033;
let instruction2 = 0xF133;
let instruction3 = 0xF233;
execute(instruction1, &mut em);
em.i = 3;
execute(instruction2, &mut em);
em.i = 6;
execute(instruction3, &mut em);
assert_eq!(&em.memory[0..9], &[2, 5, 5, 0, 9, 9, 0, 0, 1]);
}
}
}

60
src/interpreter/test.rs Normal file
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@ -0,0 +1,60 @@
use crate::interpreter::{Emulator, execute};
#[test]
fn instructions_0_1_2() {
let mut em = Emulator::default();
em.pc = 10;
execute(0x20FF, &mut em); // call 0FF
assert_eq!(em.pc + 1, 0x0FF);
assert_eq!(em.sp, 1);
em.pc = 0x0FF;
execute(0x00EE, &mut em); // return
assert_eq!(em.sp, 0);
assert_eq!(em.pc, 10);
execute(0x10AB, &mut em); // jmp to 0AB
assert_eq!(em.pc + 1, 0x0AB);
}
#[test]
fn instructions_3_4_5() {
let mut em = Emulator::default();
em.reg[0] = 0xF2;
execute(0x30F2, &mut em);
assert_eq!(em.pc, 1);
execute(0x40F3, &mut em);
assert_eq!(em.pc, 2);
execute(0x40F2, &mut em);
assert_eq!(em.pc, 2);
em.reg[1] = 0xF2;
execute(0x5010, &mut em);
assert_eq!(em.pc, 3);
}
#[test]
fn instructions_6_7() {
let mut em = Emulator::default();
execute(0x60AB, &mut em);
assert_eq!(em.reg[0], 0xAB);
execute(0x69FF, &mut em);
assert_eq!(em.reg[9], 0xFF);
execute(0x7001, &mut em);
assert_eq!(em.reg[0], 0xAC);
}
#[test]
fn instruction_fx33_conversion() {
let mut em = Emulator::default();
em.reg[0] = 255;
em.reg[1] = 99;
em.reg[2] = 1;
let instruction1 = 0xF033;
let instruction2 = 0xF133;
let instruction3 = 0xF233;
execute(instruction1, &mut em);
em.i = 3;
execute(instruction2, &mut em);
em.i = 6;
execute(instruction3, &mut em);
assert_eq!(&em.memory[0..9], &[2, 5, 5, 0, 9, 9, 0, 0, 1]);
}

3
src/main.rs
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@ -1,8 +1,7 @@
use crate::interpreter::{run};
use crate::interpreter::run;
mod interpreter;
fn main() {
println!("Hello, world!");
run(&[])
}