Restart instruction refactor

Cargo.lock

@@ -85,6 +85,15 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
 
+[[package]]
+name = "bitflags"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.16.0"
@@ -189,6 +198,7 @@ name = "dust-lang"
 version = "0.5.0"
 dependencies = [
  "annotate-snippets",
+ "bitflags",
  "colored",
  "env_logger",
  "getrandom",

dust-lang/Cargo.toml

@@ -22,6 +22,7 @@ smallvec = { version = "1.13.2", features = ["serde"] }
 smartstring = { version = "1.0.1", features = [
     "serde",
 ], default-features = false }
+bitflags = { version = "2.6.0", features = ["serde"] }
 
 [dev-dependencies]
 env_logger = "0.11.5"

dust-lang/src/instruction/add.rs

@@ -8,11 +8,7 @@ pub struct Add {
 
 impl From<&Instruction> for Add {
     fn from(instruction: &Instruction) -> Self {
-        let destination = if instruction.a_is_local() {
+        let destination = instruction.a_as_destination();
-            Destination::Local(instruction.a())
-        } else {
-            Destination::Register(instruction.a())
-        };
         let (left, right) = instruction.b_and_c_as_arguments();
 
         Add {
@@ -25,19 +21,16 @@ impl From<&Instruction> for Add {
 
 impl From<Add> for Instruction {
     fn from(add: Add) -> Self {
-        let (a, a_is_local) = match add.destination {
+        let (a, a_options) = add.destination.as_index_and_a_options();
-            Destination::Local(local) => (local, true),
+        let (b, b_options) = add.left.as_index_and_b_options();
-            Destination::Register(register) => (register, false),
+        let (c, c_options) = add.right.as_index_and_c_options();
-        };
 
-        *Instruction::new(Operation::Add)
+        Instruction {
-            .set_a(a)
+            operation: Operation::ADD,
-            .set_a_is_local(a_is_local)
+            options: a_options | b_options | c_options,
-            .set_b(add.left.index())
+            a,
-            .set_b_is_constant(add.left.is_constant())
+            b,
-            .set_b_is_local(add.left.is_local())
+            c,
-            .set_c(add.right.index())
+        }
-            .set_c_is_constant(add.right.is_constant())
-            .set_c_is_local(add.right.is_local())
     }
 }

dust-lang/src/instruction/call.rs

@@ -8,33 +8,25 @@ pub struct Call {
 
 impl From<&Instruction> for Call {
     fn from(instruction: &Instruction) -> Self {
-        let destination = if instruction.a_is_local() {
-            Destination::Local(instruction.a())
-        } else {
-            Destination::Register(instruction.a())
-        };
-
         Call {
-            destination,
+            destination: instruction.a_as_destination(),
             function: instruction.b_as_argument(),
-            argument_count: instruction.c(),
+            argument_count: instruction.c,
         }
     }
 }
 
 impl From<Call> for Instruction {
     fn from(call: Call) -> Self {
-        let (a, a_is_local) = match call.destination {
+        let (a, a_options) = call.destination.as_index_and_a_options();
-            Destination::Local(local) => (local, true),
+        let (b, b_options) = call.function.as_index_and_b_options();
-            Destination::Register(register) => (register, false),
-        };
 
-        *Instruction::new(Operation::Call)
+        Instruction {
-            .set_a(a)
+            operation: Operation::CALL,
-            .set_a_is_local(a_is_local)
+            options: a_options | b_options,
-            .set_b(call.function.index())
+            a,
-            .set_b_is_constant(call.function.is_constant())
+            b,
-            .set_b_is_local(call.function.is_local())
+            c: call.argument_count,
-            .set_c(call.argument_count)
+        }
     }
 }

dust-lang/src/instruction/mod.rs

@@ -71,6 +71,8 @@ mod r#move;
 mod multiply;
 mod negate;
 mod not;
+mod operation;
+mod options;
 mod r#return;
 mod set_local;
 mod subtract;
@@ -98,6 +100,8 @@ pub use modulo::Modulo;
 pub use multiply::Multiply;
 pub use negate::Negate;
 pub use not::Not;
+pub use operation::Operation;
+pub use options::InstructionOptions;
 pub use r#move::Move;
 pub use r#return::Return;
 pub use set_local::SetLocal;
@@ -107,19 +111,21 @@ pub use test_set::TestSet;
 
 use serde::{Deserialize, Serialize};
 
-use crate::{NativeFunction, Operation};
+use crate::NativeFunction;
 
 /// An operation and its arguments for the Dust virtual machine.
 ///
 /// See the [module-level documentation](index.html) for more information.
-#[derive(Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
+#[derive(Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
-pub struct Instruction(u64);
+pub struct Instruction {
+    operation: Operation,
+    options: InstructionOptions,
+    a: u16,
+    b: u16,
+    c: u16,
+}
 
 impl Instruction {
-    pub fn new(operation: Operation) -> Instruction {
-        Instruction(operation as u64)
-    }
-
     pub fn r#move(from: u16, to: u16) -> Instruction {
         Instruction::from(Move { from, to })
     }
@@ -296,215 +302,115 @@ impl Instruction {
     }
 
     pub fn destination_as_argument(&self) -> Option<Argument> {
-        match self.operation() {
+        match self.operation {
-            Operation::LoadConstant => Some(Argument::Constant(self.b())),
+            Operation::LOAD_CONSTANT => Some(Argument::Constant(self.b)),
-            Operation::GetLocal => Some(Argument::Local(self.b())),
+            Operation::GET_LOCAL => Some(Argument::Local(self.b)),
-            Operation::LoadBoolean
+            Operation::LOAD_BOOLEAN
-            | Operation::LoadList
+            | Operation::LOAD_LIST
-            | Operation::LoadSelf
+            | Operation::LOAD_SELF
-            | Operation::Add
+            | Operation::ADD
-            | Operation::Subtract
+            | Operation::SUBTRACT
-            | Operation::Multiply
+            | Operation::MULTIPLY
-            | Operation::Divide
+            | Operation::DIVIDE
-            | Operation::Modulo
+            | Operation::MODULO
-            | Operation::Negate
+            | Operation::NEGATE
-            | Operation::Not
+            | Operation::NOT
-            | Operation::Call
+            | Operation::CALL
-            | Operation::CallNative => Some(Argument::Register(self.a())),
+            | Operation::CALL_NATIVE => Some(Argument::Register(self.a)),
             _ => None,
         }
     }
 
-    pub fn b_as_argument(&self) -> Argument {
+    pub fn a_as_destination(&self) -> Destination {
-        if self.b_is_constant() {
+        if self.options.a_is_local() {
-            Argument::Constant(self.b())
+            Destination::Local(self.a)
-        } else if self.b_is_local() {
-            Argument::Local(self.b())
         } else {
-            Argument::Register(self.b())
+            Destination::Register(self.a)
+        }
+    }
+
+    pub fn b_as_argument(&self) -> Argument {
+        if self.options.b_is_constant() {
+            Argument::Constant(self.b)
+        } else if self.options.b_is_local() {
+            Argument::Local(self.b)
+        } else {
+            Argument::Register(self.b)
         }
     }
 
     pub fn b_and_c_as_arguments(&self) -> (Argument, Argument) {
-        let left = if self.b_is_constant() {
+        let left = if self.options.b_is_constant() {
-            Argument::Constant(self.b())
+            Argument::Constant(self.b)
-        } else if self.b_is_local() {
+        } else if self.options.b_is_local() {
-            Argument::Local(self.b())
+            Argument::Local(self.b)
         } else {
-            Argument::Register(self.b())
+            Argument::Register(self.b)
         };
-        let right = if self.c_is_constant() {
+        let right = if self.options.c_is_constant() {
-            Argument::Constant(self.c())
+            Argument::Constant(self.c)
-        } else if self.c_is_local() {
+        } else if self.options.c_is_local() {
-            Argument::Local(self.c())
+            Argument::Local(self.c)
         } else {
-            Argument::Register(self.c())
+            Argument::Register(self.c)
         };
 
         (left, right)
     }
 
-    pub fn operation(&self) -> Operation {
-        Operation::from((self.0 & 0b11111111) as u8)
-    }
-
-    pub fn set_b_is_constant(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(1 << 9)) | ((boolean as u64) << 9);
-
-        self
-    }
-
-    pub fn set_c_is_constant(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(1 << 10)) | ((boolean as u64) << 10);
-
-        self
-    }
-
-    pub fn set_a_is_local(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(1 << 11)) | ((boolean as u64) << 11);
-
-        self
-    }
-
-    pub fn set_b_is_local(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(1 << 12)) | ((boolean as u64) << 12);
-
-        self
-    }
-
-    pub fn set_c_is_local(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(1 << 13)) | ((boolean as u64) << 13);
-
-        self
-    }
-
-    pub fn a(&self) -> u16 {
-        ((self.0 >> 16) & 0b1111111111111111) as u16
-    }
-
-    pub fn a_as_boolean(&self) -> bool {
-        self.a() != 0
-    }
-
-    pub fn set_a(&mut self, a: u16) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 16)) | ((a as u64) << 16);
-
-        self
-    }
-
-    pub fn set_a_to_boolean(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 16)) | ((boolean as u64) << 16);
-
-        self
-    }
-
-    pub fn b(&self) -> u16 {
-        ((self.0 >> 32) & 0b1111111111111111) as u16
-    }
-
-    pub fn b_as_boolean(&self) -> bool {
-        self.b() != 0
-    }
-
-    pub fn set_b(&mut self, b: u16) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 32)) | ((b as u64) << 32);
-
-        self
-    }
-
-    pub fn set_b_to_boolean(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 32)) | ((boolean as u64) << 32);
-
-        self
-    }
-
-    pub fn c(&self) -> u16 {
-        ((self.0 >> 48) & 0b1111111111111111) as u16
-    }
-
-    pub fn c_as_boolean(&self) -> bool {
-        self.c() != 0
-    }
-
-    pub fn set_c(&mut self, c: u16) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 48)) | ((c as u64) << 48);
-
-        self
-    }
-
-    pub fn set_c_to_boolean(&mut self, boolean: bool) -> &mut Self {
-        self.0 = (self.0 & !(0b1111111111111111 << 48)) | ((boolean as u64) << 48);
-
-        self
-    }
-
-    pub fn b_is_constant(&self) -> bool {
-        (self.0 >> 9) & 1 == 1
-    }
-
-    pub fn c_is_constant(&self) -> bool {
-        (self.0 >> 10) & 1 == 1
-    }
-
-    pub fn a_is_local(&self) -> bool {
-        (self.0 >> 11) & 1 == 1
-    }
-
-    pub fn b_is_local(&self) -> bool {
-        (self.0 >> 12) & 1 == 1
-    }
-
-    pub fn c_is_local(&self) -> bool {
-        (self.0 >> 13) & 1 == 1
-    }
-
     pub fn yields_value(&self) -> bool {
-        match self.operation() {
+        match self.operation {
-            Operation::LoadBoolean
+            Operation::LOAD_BOOLEAN
-            | Operation::LoadConstant
+            | Operation::LOAD_CONSTANT
-            | Operation::LoadList
+            | Operation::LOAD_LIST
-            | Operation::LoadSelf
+            | Operation::LOAD_SELF
-            | Operation::GetLocal
+            | Operation::GET_LOCAL
-            | Operation::Add
+            | Operation::ADD
-            | Operation::Subtract
+            | Operation::SUBTRACT
-            | Operation::Multiply
+            | Operation::MULTIPLY
-            | Operation::Divide
+            | Operation::DIVIDE
-            | Operation::Modulo
+            | Operation::MODULO
-            | Operation::Negate
+            | Operation::NEGATE
-            | Operation::Not
+            | Operation::NOT
-            | Operation::Call => true,
+            | Operation::CALL => true,
-            Operation::Move
+            Operation::MOVE
-            | Operation::Close
+            | Operation::CLOSE
-            | Operation::DefineLocal
+            | Operation::SET_LOCAL
-            | Operation::SetLocal
+            | Operation::EQUAL
-            | Operation::Equal
+            | Operation::LESS
-            | Operation::Less
+            | Operation::LESS_EQUAL
-            | Operation::LessEqual
+            | Operation::TEST
-            | Operation::Test
+            | Operation::TEST_SET
-            | Operation::TestSet
+            | Operation::JUMP
-            | Operation::Jump
+            | Operation::RETURN => false,
-            | Operation::Return => false,
+            Operation::CALL_NATIVE => {
-            Operation::CallNative => {
+                let function = NativeFunction::from(self.b);
-                let function = NativeFunction::from(self.b());
 
                 function.returns_value()
             }
+            _ => {
+                if cfg!(debug_assertions) {
+                    panic!("Unknown operation {}", self.operation);
+                } else {
+                    false
+                }
+            }
         }
     }
 
     pub fn disassembly_info(&self) -> String {
-        match self.operation() {
+        match self.operation {
-            Operation::Move => {
+            Operation::MOVE => {
                 let Move { from, to } = Move::from(self);
 
                 format!("R{to} = R{from}")
             }
-            Operation::Close => {
+            Operation::CLOSE => {
                 let Close { from, to } = Close::from(self);
 
                 format!("R{from}..R{to}")
             }
-            Operation::LoadBoolean => {
+            Operation::LOAD_BOOLEAN => {
                 let LoadBoolean {
                     destination,
                     value,
@@ -517,7 +423,7 @@ impl Instruction {
                     format!("{destination} = {value}")
                 }
             }
-            Operation::LoadConstant => {
+            Operation::LOAD_CONSTANT => {
                 let LoadConstant {
                     destination,
                     constant_index,
@@ -530,7 +436,7 @@ impl Instruction {
                     format!("{destination} = C{constant_index}")
                 }
             }
-            Operation::LoadList => {
+            Operation::LOAD_LIST => {
                 let LoadList {
                     destination,
                     start_register,
@@ -539,25 +445,12 @@ impl Instruction {
 
                 format!("{destination} = [R{start_register}..=R{end_register}]",)
             }
-            Operation::LoadSelf => {
+            Operation::LOAD_SELF => {
                 let LoadSelf { destination } = LoadSelf::from(self);
 
                 format!("{destination} = self")
             }
-            Operation::DefineLocal => {
+            Operation::GET_LOCAL => {
-                let DefineLocal {
-                    register,
-                    local_index,
-                    is_mutable,
-                } = DefineLocal::from(self);
-
-                if is_mutable {
-                    format!("mut L{local_index} = R{register}")
-                } else {
-                    format!("L{local_index} = R{register}")
-                }
-            }
-            Operation::GetLocal => {
                 let GetLocal {
                     destination,
                     local_index,
@@ -565,7 +458,7 @@ impl Instruction {
 
                 format!("{destination} = L{local_index}")
             }
-            Operation::SetLocal => {
+            Operation::SET_LOCAL => {
                 let SetLocal {
                     register,
                     local_index,
@@ -573,7 +466,7 @@ impl Instruction {
 
                 format!("L{local_index} = R{register}")
             }
-            Operation::Add => {
+            Operation::ADD => {
                 let Add {
                     destination,
                     left,
@@ -582,7 +475,7 @@ impl Instruction {
 
                 format!("{destination} = {left} + {right}")
             }
-            Operation::Subtract => {
+            Operation::SUBTRACT => {
                 let Subtract {
                     destination,
                     left,
@@ -591,7 +484,7 @@ impl Instruction {
 
                 format!("{destination} = {left} - {right}")
             }
-            Operation::Multiply => {
+            Operation::MULTIPLY => {
                 let Multiply {
                     destination,
                     left,
@@ -600,7 +493,7 @@ impl Instruction {
 
                 format!("{destination} = {left} * {right}")
             }
-            Operation::Divide => {
+            Operation::DIVIDE => {
                 let Divide {
                     destination,
                     left,
@@ -609,7 +502,7 @@ impl Instruction {
 
                 format!("{destination} = {left} / {right}")
             }
-            Operation::Modulo => {
+            Operation::MODULO => {
                 let Modulo {
                     destination,
                     left,
@@ -618,7 +511,7 @@ impl Instruction {
 
                 format!("{destination} = {left} % {right}")
             }
-            Operation::Test => {
+            Operation::TEST => {
                 let Test {
                     argument,
                     test_value: value,
@@ -627,7 +520,7 @@ impl Instruction {
 
                 format!("if {bang}{argument} {{ JUMP +1 }}",)
             }
-            Operation::TestSet => {
+            Operation::TEST_SET => {
                 let TestSet {
                     destination,
                     argument,
@@ -637,25 +530,25 @@ impl Instruction {
 
                 format!("if {bang}{argument} {{ JUMP +1 }} else {{ {destination} = {argument} }}")
             }
-            Operation::Equal => {
+            Operation::EQUAL => {
                 let Equal { value, left, right } = Equal::from(self);
                 let comparison_symbol = if value { "==" } else { "!=" };
 
                 format!("if {left} {comparison_symbol} {right} {{ JUMP +1 }}")
             }
-            Operation::Less => {
+            Operation::LESS => {
                 let Less { value, left, right } = Less::from(self);
                 let comparison_symbol = if value { "<" } else { ">=" };
 
                 format!("if {left} {comparison_symbol} {right} {{ JUMP +1 }}")
             }
-            Operation::LessEqual => {
+            Operation::LESS_EQUAL => {
                 let LessEqual { value, left, right } = LessEqual::from(self);
                 let comparison_symbol = if value { "<=" } else { ">" };
 
                 format!("if {left} {comparison_symbol} {right} {{ JUMP +1 }}")
             }
-            Operation::Negate => {
+            Operation::NEGATE => {
                 let Negate {
                     destination,
                     argument,
@@ -663,7 +556,7 @@ impl Instruction {
 
                 format!("{destination} = -{argument}")
             }
-            Operation::Not => {
+            Operation::NOT => {
                 let Not {
                     destination,
                     argument,
@@ -671,7 +564,7 @@ impl Instruction {
 
                 format!("{destination} = !{argument}")
             }
-            Operation::Jump => {
+            Operation::JUMP => {
                 let Jump {
                     offset,
                     is_positive,
@@ -683,7 +576,7 @@ impl Instruction {
                     format!("JUMP -{offset}")
                 }
             }
-            Operation::Call => {
+            Operation::CALL => {
                 let Call {
                     destination,
                     function,
@@ -694,7 +587,7 @@ impl Instruction {
 
                 format!("{destination} = {function}(R{arguments_start}..R{arguments_end})")
             }
-            Operation::CallNative => {
+            Operation::CALL_NATIVE => {
                 let CallNative {
                     destination,
                     function,
@@ -709,7 +602,7 @@ impl Instruction {
                     format!("{function}(R{arguments_start}..R{arguments_end})")
                 }
             }
-            Operation::Return => {
+            Operation::RETURN => {
                 let Return {
                     should_return_value,
                 } = Return::from(self);
@@ -720,19 +613,20 @@ impl Instruction {
                     "".to_string()
                 }
             }
+            _ => {
+                if cfg!(debug_assertions) {
+                    panic!("Unknown operation {}", self.operation);
+                } else {
+                    "RETURN".to_string()
+                }
             }
         }
-}
-
-impl From<&Instruction> for u64 {
-    fn from(instruction: &Instruction) -> Self {
-        instruction.0
     }
 }
 
 impl Debug for Instruction {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(f, "{} {}", self.operation(), self.disassembly_info())
+        write!(f, "{} {}", self.operation, self.disassembly_info())
     }
 }
 
@@ -757,6 +651,13 @@ impl Destination {
     pub fn is_register(&self) -> bool {
         matches!(self, Destination::Register(_))
     }
+
+    pub fn as_index_and_a_options(&self) -> (u16, InstructionOptions) {
+        match self {
+            Destination::Local(index) => (*index, InstructionOptions::A_IS_LOCAL),
+            Destination::Register(index) => (*index, InstructionOptions::empty()),
+        }
+    }
 }
 
 impl Display for Destination {
@@ -795,6 +696,22 @@ impl Argument {
     pub fn is_register(&self) -> bool {
         matches!(self, Argument::Register(_))
     }
+
+    pub fn as_index_and_b_options(&self) -> (u16, InstructionOptions) {
+        match self {
+            Argument::Constant(index) => (*index, InstructionOptions::B_IS_CONSTANT),
+            Argument::Local(index) => (*index, InstructionOptions::B_IS_LOCAL),
+            Argument::Register(index) => (*index, InstructionOptions::empty()),
+        }
+    }
+
+    pub fn as_index_and_c_options(&self) -> (u16, InstructionOptions) {
+        match self {
+            Argument::Constant(index) => (*index, InstructionOptions::C_IS_CONSTANT),
+            Argument::Local(index) => (*index, InstructionOptions::C_IS_LOCAL),
+            Argument::Register(index) => (*index, InstructionOptions::empty()),
+        }
+    }
 }
 
 impl Display for Argument {

dust-lang/src/instruction/operation.rs

@@ -0,0 +1,83 @@
+//! Part of an [Instruction][crate::Instruction] that is encoded as a single byte.
+
+use std::fmt::{self, Debug, Display, Formatter};
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
+pub struct Operation(u8);
+
+impl Operation {
+    pub const MOVE: Operation = Operation(0);
+    pub const CLOSE: Operation = Operation(1);
+    pub const LOAD_BOOLEAN: Operation = Operation(2);
+    pub const LOAD_CONSTANT: Operation = Operation(3);
+    pub const LOAD_LIST: Operation = Operation(4);
+    pub const LOAD_SELF: Operation = Operation(5);
+    pub const GET_LOCAL: Operation = Operation(6);
+    pub const SET_LOCAL: Operation = Operation(7);
+    pub const ADD: Operation = Operation(8);
+    pub const SUBTRACT: Operation = Operation(9);
+    pub const MULTIPLY: Operation = Operation(10);
+    pub const DIVIDE: Operation = Operation(11);
+    pub const MODULO: Operation = Operation(12);
+    pub const TEST: Operation = Operation(13);
+    pub const TEST_SET: Operation = Operation(14);
+    pub const EQUAL: Operation = Operation(15);
+    pub const LESS: Operation = Operation(16);
+    pub const LESS_EQUAL: Operation = Operation(17);
+    pub const NEGATE: Operation = Operation(18);
+    pub const NOT: Operation = Operation(19);
+    pub const CALL: Operation = Operation(20);
+    pub const CALL_NATIVE: Operation = Operation(21);
+    pub const JUMP: Operation = Operation(22);
+    pub const RETURN: Operation = Operation(23);
+
+    pub fn name(self) -> &'static str {
+        match self {
+            Self::MOVE => "MOVE",
+            Self::CLOSE => "CLOSE",
+            Self::LOAD_BOOLEAN => "LOAD_BOOLEAN",
+            Self::LOAD_CONSTANT => "LOAD_CONSTANT",
+            Self::LOAD_LIST => "LOAD_LIST",
+            Self::LOAD_SELF => "LOAD_SELF",
+            Self::GET_LOCAL => "GET_LOCAL",
+            Self::SET_LOCAL => "SET_LOCAL",
+            Self::ADD => "ADD",
+            Self::SUBTRACT => "SUBTRACT",
+            Self::MULTIPLY => "MULTIPLY",
+            Self::DIVIDE => "DIVIDE",
+            Self::MODULO => "MODULO",
+            Self::TEST => "TEST",
+            Self::TEST_SET => "TEST_SET",
+            Self::EQUAL => "EQUAL",
+            Self::LESS => "LESS",
+            Self::LESS_EQUAL => "LESS_EQUAL",
+            Self::NEGATE => "NEGATE",
+            Self::NOT => "NOT",
+            Self::CALL => "CALL",
+            Self::CALL_NATIVE => "CALL_NATIVE",
+            Self::JUMP => "JUMP",
+            Self::RETURN => "RETURN",
+            _ => {
+                if cfg!(debug_assertions) {
+                    panic!("Unknown operation code {}", self.0);
+                } else {
+                    "RETURN"
+                }
+            }
+        }
+    }
+}
+
+impl Debug for Operation {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "Operation({})", self.name())
+    }
+}
+
+impl Display for Operation {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "{}", self.name())
+    }
+}

dust-lang/src/instruction/options.rs

@@ -0,0 +1,43 @@
+use bitflags::bitflags;
+use serde::{Deserialize, Serialize};
+
+bitflags! {
+    #[derive(Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
+    pub struct InstructionOptions: u8 {
+        const A_IS_LOCAL = 0b00000001;
+
+        const B_IS_CONSTANT = 0b00000010;
+        const B_IS_LOCAL = 0b00000100;
+
+        const C_IS_CONSTANT = 0b00001000;
+        const C_IS_LOCAL = 0b00010000;
+
+        const D_FIELD = 0b00100000;
+    }
+}
+
+impl InstructionOptions {
+    pub fn a_is_local(self) -> bool {
+        self.contains(Self::A_IS_LOCAL)
+    }
+
+    pub fn b_is_constant(self) -> bool {
+        self.contains(Self::B_IS_CONSTANT)
+    }
+
+    pub fn b_is_local(self) -> bool {
+        self.contains(Self::B_IS_LOCAL)
+    }
+
+    pub fn c_is_constant(self) -> bool {
+        self.contains(Self::C_IS_CONSTANT)
+    }
+
+    pub fn c_is_local(self) -> bool {
+        self.contains(Self::C_IS_LOCAL)
+    }
+
+    pub fn d(self) -> bool {
+        self.contains(Self::D_FIELD)
+    }
+}

dust-lang/src/lib.rs

@@ -35,7 +35,6 @@ pub mod dust_error;
 pub mod instruction;
 pub mod lexer;
 pub mod native_function;
-pub mod operation;
 pub mod optimize;
 pub mod scope;
 pub mod token;
@@ -47,10 +46,9 @@ pub use crate::chunk::{Chunk, Local};
 pub use crate::compiler::{compile, CompileError, Compiler};
 pub use crate::disassembler::Disassembler;
 pub use crate::dust_error::{AnnotatedError, DustError};
-pub use crate::instruction::{Argument, Destination, Instruction};
+pub use crate::instruction::{Argument, Destination, Instruction, Operation};
 pub use crate::lexer::{lex, LexError, Lexer};
 pub use crate::native_function::{NativeFunction, NativeFunctionError};
-pub use crate::operation::Operation;
 pub use crate::optimize::{optimize_control_flow, optimize_set_local};
 pub use crate::r#type::{EnumType, FunctionType, StructType, Type, TypeConflict};
 pub use crate::scope::Scope;

dust-lang/src/operation.rs

@@ -1,112 +0,0 @@
-//! Part of an [Instruction][crate::Instruction] that is encoded as a single byte.
-
-use std::fmt::{self, Display, Formatter};
-
-macro_rules! define_operation {
-    ($(($name:ident, $byte:literal, $str:expr)),*) => {
-        /// Part of an [Instruction][crate::Instruction] that is encoded as a single byte.
-        #[derive(Clone, Copy, Debug, PartialEq)]
-        pub enum Operation {
-            $(
-                $name = $byte as isize,
-            )*
-        }
-
-        impl From<u8> for Operation {
-            fn from(byte: u8) -> Self {
-                match byte {
-                    $(
-                        $byte => Operation::$name,
-                    )*
-                    _ => {
-                        if cfg!(test) {
-                            panic!("Invalid operation byte: {}", byte)
-                        } else {
-                            Operation::Return
-                        }
-                    }
-                }
-            }
-        }
-
-        impl From<Operation> for u8 {
-            fn from(operation: Operation) -> Self {
-                match operation {
-                    $(
-                        Operation::$name => $byte,
-                    )*
-                }
-            }
-        }
-
-        impl Display for Operation {
-            fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-                match self {
-                    $(
-                        Operation::$name => write!(f, "{}", $str),
-                    )*
-                }
-            }
-        }
-    }
-}
-
-define_operation! {
-    (Move, 0, "MOVE"),
-    (Close, 1, "CLOSE"),
-
-    (LoadBoolean, 2, "LOAD_BOOLEAN"),
-    (LoadConstant, 3, "LOAD_CONSTANT"),
-    (LoadList, 4, "LOAD_LIST"),
-    (LoadSelf, 5, "LOAD_SELF"),
-
-    (DefineLocal, 6, "DEFINE_LOCAL"),
-    (GetLocal, 7, "GET_LOCAL"),
-    (SetLocal, 8, "SET_LOCAL"),
-
-    (Add, 9, "ADD"),
-    (Subtract, 10, "SUBTRACT"),
-    (Multiply, 11, "MULTIPLY"),
-    (Divide, 12, "DIVIDE"),
-    (Modulo, 13, "MODULO"),
-
-    (Test, 14, "TEST"),
-    (TestSet, 15, "TEST_SET"),
-
-    (Equal, 16, "EQUAL"),
-    (Less, 17, "LESS"),
-    (LessEqual, 18, "LESS_EQUAL"),
-
-    (Negate, 19, "NEGATE"),
-    (Not, 20, "NOT"),
-
-    (Call, 21, "CALL"),
-    (CallNative, 22, "CALL_NATIVE"),
-
-    (Jump, 23, "JUMP"),
-    (Return, 24, "RETURN")
-}
-
-impl Operation {
-    pub fn is_math(&self) -> bool {
-        matches!(
-            self,
-            Operation::Add
-                | Operation::Subtract
-                | Operation::Multiply
-                | Operation::Divide
-                | Operation::Modulo
-        )
-    }
-
-    pub fn is_comparison(&self) -> bool {
-        matches!(
-            self,
-            Operation::Equal | Operation::Less | Operation::LessEqual
-        )
-    }
-
-    pub fn is_test(&self) -> bool {
-        matches!(self, Operation::Test | Operation::TestSet)
-    }
-}