ok alright alright alright alright alright

backend/src/cpu/registers.rs

@@ -1,3 +1,31 @@
+pub trait RegisterValue: Sized {
+    fn read_from(raw: i64) -> Self;
+    fn write_to(value: Self) -> i64;
+}
+
+macro_rules! impl_register_value {
+    ($ty:ty) => {
+        impl RegisterValue for $ty {
+            fn read_from(raw: i64) -> Self {
+                raw as $ty
+            }
+
+            fn write_to(value: Self) -> i64 {
+                value as i64
+            }
+        }
+    };
+}
+
+impl_register_value!(u8);
+impl_register_value!(i8);
+impl_register_value!(u16);
+impl_register_value!(i16);
+impl_register_value!(u32);
+impl_register_value!(i32);
+impl_register_value!(u64);
+impl_register_value!(i64);
+
 pub struct Registers {
     delay_slot: bool,
     prev_delay_slot: bool,
@@ -37,81 +65,16 @@ impl Registers {
         self.next_pc = self.pc + 4;
     }
 
-    pub fn read_u8(&self, idx: usize) -> u8 {
+    pub fn read<T: RegisterValue>(&self, idx: usize) -> T {
-        self.gpr[idx] as u8
+        T::read_from(self.gpr[idx])
     }
 
-    pub fn read_i8(&self, idx: usize) -> i8 {
+    pub fn write<T: RegisterValue>(&mut self, idx: usize, val: T) {
-        self.gpr[idx] as i8
-    }
-
-    pub fn read_u16(&self, idx: usize) -> u16 {
-        self.gpr[idx] as u16
-    }
-
-    pub fn read_u32(&self, idx: usize) -> u32 {
-        self.gpr[idx] as u32
-    }
-
-    pub fn read_i16(&self, idx: usize) -> i16 {
-        self.gpr[idx] as i16
-    }
-
-    pub fn read_i32(&self, idx: usize) -> i32 {
-        self.gpr[idx] as i32
-    }
-
-    pub fn write_u8(&mut self, idx: usize, val: u8) {
         if idx == 0 {
             return;
         }
 
         self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
+        self.gpr[idx] = T::write_to(val);
-    }
-
-    pub fn write_i8(&mut self, idx: usize, val: i8) {
-        if idx == 0 {
-            return;
-        }
-
-        self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
-    }
-
-    pub fn write_u16(&mut self, idx: usize, val: u16) {
-        if idx == 0 {
-            return;
-        }
-
-        self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
-    }
-
-    pub fn write_u32(&mut self, idx: usize, val: u32) {
-        if idx == 0 {
-            return;
-        }
-
-        self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
-    }
-
-    pub fn write_i16(&mut self, idx: usize, val: i16) {
-        if idx == 0 {
-            return;
-        }
-
-        self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
-    }
-
-    pub fn write_i32(&mut self, idx: usize, val: i32) {
-        if idx == 0 {
-            return;
-        }
-
-        self.constant_regs |= 1 << idx;
-        self.gpr[idx] = val as i64;
     }
 }