Update registers to be constants, add instructions to parser

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/vm/reg.rs

@@ -1,83 +1,94 @@
-#[repr(u8)]
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-#[allow(dead_code)]
-pub enum Reg {
+macro_rules! registers {
+    {
+        $($variant:ident = $value:expr),* $(,)?
+    } => {
+        pub type Reg = u8;
+
+        $(
+            #[allow(dead_code)]
+            pub const $variant: Reg = $value;
+        )*
+    };
+}
+
+registers! {
     // https://crates.io/crates/packed_struct
     // TODO : check this muffugin shit out!!
 
-    /// Instruction pointer
-    Ip = 0,
+    // Instruction pointer
+    IP = 0,
 
-    /// Stack pointer
-    Sp,
+    // Stack pointer
+    SP = 1,
 
-    /// Frame pointer
-    Fp,
+    // Frame pointer
+    FP = 2,
 
-    /// Flags
-    Flags,
+    // Flags
+    FLAGS = 3,
 
-    Unused00,
-    Unused01,
-    Unused02,
-    Unused03,
-    Unused04,
-    Unused05,
-    Unused06,
-    Unused07,
-    Unused08,
+    UNUSED00 = 4,
+    UNUSED01 = 5,
+    UNUSED02 = 6,
+    UNUSED03 = 7,
+    UNUSED04 = 8,
+    UNUSED05 = 9,
+    UNUSED06 = 10,
+    UNUSED07 = 11,
+    UNUSED08 = 12,
 
-    /// General status code
-    Status,
+    // General status code
+    STATUS = 13,
 
-    R00,
-    R01,
-    R02,
-    R03,
-    R04,
-    R05,
-    R06,
-    R07,
-    R08,
-    R09,
-    R10,
-    R11,
-    R12,
-    R13,
-    R14,
-    R15,
-    R16,
-    R17,
-    R18,
-    R19,
-    R20,
-    R21,
-    R22,
-    R23,
-    R24,
-    R25,
-    R26,
-    R27,
-    R28,
-    R29,
-    R30,
-    R31,
-    R32,
-    R33,
-    R34,
-    R35,
-    R36,
-    R37,
-    R38,
-    R39,
-    R40,
-    R41,
-    R42,
-    R43,
-    R44,
-    R45,
-    R46,
-    R47,
-    R48,
-    R49,
+    R00 = 14,
+    R01 = 15,
+    R02 = 16,
+    R03 = 17,
+    R04 = 18,
+    R05 = 19,
+    R06 = 20,
+    R07 = 21,
+    R08 = 22,
+    R09 = 23,
+    R10 = 24,
+    R11 = 25,
+    R12 = 26,
+    R13 = 27,
+    R14 = 28,
+    R15 = 29,
+    R16 = 30,
+    R17 = 31,
+    R18 = 32,
+    R19 = 33,
+    R20 = 34,
+    R21 = 35,
+    R22 = 36,
+    R23 = 37,
+    R24 = 38,
+    R25 = 39,
+    R26 = 40,
+    R27 = 41,
+    R28 = 42,
+    R29 = 43,
+    R30 = 44,
+    R31 = 45,
+    R32 = 46,
+    R33 = 47,
+    R34 = 48,
+    R35 = 49,
+    R36 = 50,
+    R37 = 51,
+    R38 = 52,
+    R39 = 53,
+    R40 = 54,
+    R41 = 55,
+    R42 = 56,
+    R43 = 57,
+    R44 = 58,
+    R45 = 59,
+    R46 = 60,
+    R47 = 61,
+    R48 = 62,
+    R49 = 63,
+    LAST_REG = R49,
 }