Arithmatic

input.fg

@@ -1,3 +1,11 @@
-REG rx, 6
-REG ry, 7
-ADD rx, ry, 0
+reg rx, 1
+reg ry, 2
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx
+mul rx, ry, rx

src/emulator/instruction.rs

@@ -2,9 +2,12 @@ use std::fmt::Display;
 
 #[derive(Debug, Clone)]
 pub enum Instruction {
-    HLT,
-    REG(u8, usize),
-    ADD(u8, u8, u8),
+    Hlt,
+    Reg(u8, usize),
+    Add(u8, u8, u8),
+    Sub(u8, u8, u8),
+    Mul(u8, u8, u8),
+    Div(u8, u8, u8),
 }
 
 impl Display for Instruction {
@@ -13,9 +16,12 @@ impl Display for Instruction {
             f,
             "{}",
             match self {
-                Instruction::HLT => format!("HLT"),
-                Instruction::REG(a, b) => format!("REG {a}, {b}"),
-                Instruction::ADD(a, b, c) => format!("ADD {a}, {b}, {c}"),
+                Instruction::Hlt => format!("HLT"),
+                Instruction::Reg(a, b) => format!("REG {a}, {b}"),
+                Instruction::Add(a, b, c) => format!("ADD {a}, {b}, {c}"),
+                Instruction::Sub(a, b, c) => format!("SUB {a}, {b}, {c}"),
+                Instruction::Mul(a, b, c) => format!("MUL {a}, {b}, {c}"),
+                Instruction::Div(a, b, c) => format!("DIV {a}, {b}, {c}"),
             }
         )
     }

src/emulator/mod.rs

@@ -20,22 +20,43 @@ impl Emulator {
             std::thread::sleep(std::time::Duration::from_millis(100));
             let mut pc = self.pc.get();
             if let Some(inst) = self.instructions.get(**pc) {
+                **pc += 1;
                 **self.inst.get() = inst.clone();
                 match &inst {
                     // 1 | Halt
-                    Instruction::HLT => break,
+                    Instruction::Hlt => break,
 
                     // 2 | Registry set
-                    Instruction::REG(r, v) => self.registers.set(*r, *v),
+                    Instruction::Reg(r, v) => self.registers.set(*r, *v),
 
                     // 3 | Add
-                    Instruction::ADD(rx, ry, r) => {
+                    Instruction::Add(rx, ry, r) => {
                         let x = self.registers.get(*rx);
                         let y = self.registers.get(*ry);
                         self.registers.set(*r, x + y);
                     }
+
+                    // 3 | Subtract
+                    Instruction::Sub(rx, ry, r) => {
+                        let x = self.registers.get(*rx);
+                        let y = self.registers.get(*ry);
+                        self.registers.set(*r, x - y);
+                    }
+
+                    // 4 | Multiply
+                    Instruction::Mul(rx, ry, r) => {
+                        let x = self.registers.get(*rx);
+                        let y = self.registers.get(*ry);
+                        self.registers.set(*r, x * y);
+                    }
+
+                    // 5 | Divide
+                    Instruction::Div(rx, ry, r) => {
+                        let x = self.registers.get(*rx);
+                        let y = self.registers.get(*ry);
+                        self.registers.set(*r, x / y);
+                    }
                 }
-                **pc += 1;
             } else {
                 break;
             }

src/main.rs

@@ -22,7 +22,7 @@ fn main() {
 
 fn app(_screen: &Arc<Screen>, instructions: Vec<Instruction>) -> Rsx {
     let pc = use_state::<usize>(0);
-    let inst = use_state::<Instruction>(Instruction::HLT);
+    let inst = use_state::<Instruction>(Instruction::Hlt);
     let registers = Registry(use_state([0; 8]));
 
     let emulator = emulator::Emulator {

src/text.rs

@@ -21,9 +21,12 @@ pub fn from_text(s: &str) -> Vec<Instruction> {
             let args: Vec<&str> = args.split(',').map(str::trim).collect();
 
             match name.to_lowercase().as_str() {
-                "hlt" => Some(Instruction::HLT),
-                "reg" => Some(Instruction::REG(reg(args[0]), num(args[1]))),
-                "add" => Some(Instruction::ADD(reg(args[0]), reg(args[1]), reg(args[2]))),
+                "hlt" => Some(Instruction::Hlt),
+                "reg" => Some(Instruction::Reg(reg(args[0]), num(args[1]))),
+                "add" => Some(Instruction::Add(reg(args[0]), reg(args[1]), reg(args[2]))),
+                "sub" => Some(Instruction::Sub(reg(args[0]), reg(args[1]), reg(args[2]))),
+                "mul" => Some(Instruction::Mul(reg(args[0]), reg(args[1]), reg(args[2]))),
+                "div" => Some(Instruction::Div(reg(args[0]), reg(args[1]), reg(args[2]))),
                 _ => None,
             }
         })