mech_core/program/compiler/
sections.rs

1use crate::*;
2use super::*;
3
4// Byetecode Compiler
5// ============================================================================
6
7// Format:
8// 1. Header
9// 2. Features
10// 3. Types
11// 4. Constants
12// 5. Symbols
13// 6. Instructions
14// 7. Dictionary
15
16// 1. Header
17// ----------------------------------------------------------------------------
18
19#[repr(C)]
20#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
21#[derive(Debug, Clone, Eq, PartialEq)]
22pub struct ByteCodeHeader {
23  pub magic:        [u8; 4],   // e.g., b"MECH"
24  pub version:        u8,      // bytecode format version
25  pub mech_ver:       u16,     // Mech language version
26  pub flags:          u16,     // reserved/feature bit
27  pub reg_count:      u32,     // total virtual registers used
28  pub instr_count:    u32,     // number of instructions
29  
30  pub feature_count:  u32,     // number of feature flags  
31  pub feature_off:    u64,     // offset to feature flags (array of u64)
32
33  pub types_count:    u32,     // number of types
34  pub types_off:      u64,     // offset to type section
35
36  pub const_count:    u32,     // number of constants (entries
37  pub const_tbl_off:  u64,     // offset to constant table (array of entries)
38  pub const_tbl_len:  u64,     // bytes in constant table area (entries only)
39  pub const_blob_off: u64,     // offset to raw constant blob data
40  pub const_blob_len: u64,     // bytes in blob (payloads
41
42  pub symbols_len:    u64,     // number of symbols
43  pub symbols_off:    u64,     // offset to symbol section
44                               
45  pub instr_off:      u64,     // offset to instruction stream
46  pub instr_len:      u64,     // bytes of instruction stream
47
48  pub dict_off:       u64,     // offset to dictionary
49  pub dict_len:       u64,     // bytes in dictionary
50
51  pub reserved:       u32,     // pad/alignment
52}
53
54impl ByteCodeHeader {
55  // Header byte size when serialized. This is the number of bytes `write_to` will write.
56  // (Computed from the sum of sizes of each field written in little-endian.)
57  pub const HEADER_SIZE: usize = 4  // magic
58    + 1   // version
59    + 2   // mech_ver
60    + 2   // flags
61    + 4   // reg_count
62    + 4   // instr_count
63    + 4   // feature_count
64    + 8   // feature_off
65    + 4   // types_count
66    + 8   // types_off
67    + 4   // const_count
68    + 8   // const_tbl_off
69    + 8   // const_tbl_len
70    + 8   // const_blob_off
71    + 8   // const_blob_len
72    + 8   // symbols_len
73    + 8   // symbosl_off
74    + 8   // instr_off
75    + 8   // instr_len
76    + 8   // dict_off
77    + 8   // dict_len
78    + 4;  // reserved
79
80  // Serialize header using little-endian encoding.
81  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
82    // magic (4 bytes)
83    w.write_all(&self.magic)?;
84
85    // small fields
86    w.write_u8(self.version)?;
87    w.write_u16::<LittleEndian>(self.mech_ver)?;
88    w.write_u16::<LittleEndian>(self.flags)?;
89
90    // counts
91    w.write_u32::<LittleEndian>(self.reg_count)?;
92    w.write_u32::<LittleEndian>(self.instr_count)?;
93
94    // features (count + offset)
95    w.write_u32::<LittleEndian>(self.feature_count)?;
96    w.write_u64::<LittleEndian>(self.feature_off)?;
97
98    // types
99    w.write_u32::<LittleEndian>(self.types_count)?;
100    w.write_u64::<LittleEndian>(self.types_off)?;
101
102    // constants table / blob
103    w.write_u32::<LittleEndian>(self.const_count)?;
104    w.write_u64::<LittleEndian>(self.const_tbl_off)?;
105    w.write_u64::<LittleEndian>(self.const_tbl_len)?;
106    w.write_u64::<LittleEndian>(self.const_blob_off)?;
107    w.write_u64::<LittleEndian>(self.const_blob_len)?;
108
109    // symbols
110    w.write_u64::<LittleEndian>(self.symbols_len)?;
111    w.write_u64::<LittleEndian>(self.symbols_off)?;
112
113    // instructions
114    w.write_u64::<LittleEndian>(self.instr_off)?;
115    w.write_u64::<LittleEndian>(self.instr_len)?;
116
117    // dictionary
118    w.write_u64::<LittleEndian>(self.dict_off)?;
119    w.write_u64::<LittleEndian>(self.dict_len)?;
120
121    // footer
122    w.write_u32::<LittleEndian>(self.reserved)?;
123    Ok(())
124  }
125
126  // Read a header. Expects the same layout as `write_to`.
127  pub fn read_from(r: &mut impl Read) -> MResult<Self> {
128    let mut magic = [0u8; 4];
129    r.read_exact(&mut magic)?;
130
131    let version = r.read_u8()?;
132    let mech_ver = r.read_u16::<LittleEndian>()?;
133    let flags = r.read_u16::<LittleEndian>()?;
134
135    let reg_count = r.read_u32::<LittleEndian>()?;
136    let instr_count = r.read_u32::<LittleEndian>()?;
137
138    let feature_count = r.read_u32::<LittleEndian>()?;
139    let feature_off = r.read_u64::<LittleEndian>()?;
140
141    let types_count = r.read_u32::<LittleEndian>()?;
142    let types_off = r.read_u64::<LittleEndian>()?;
143
144    let const_count = r.read_u32::<LittleEndian>()?;
145    let const_tbl_off = r.read_u64::<LittleEndian>()?;
146    let const_tbl_len = r.read_u64::<LittleEndian>()?;
147    let const_blob_off = r.read_u64::<LittleEndian>()?;
148    let const_blob_len = r.read_u64::<LittleEndian>()?;
149
150    let symbols_len = r.read_u64::<LittleEndian>()?;
151    let symbols_off = r.read_u64::<LittleEndian>()?;
152
153    let instr_off = r.read_u64::<LittleEndian>()?;
154    let instr_len = r.read_u64::<LittleEndian>()?;
155
156    let dict_off = r.read_u64::<LittleEndian>()?;
157    let dict_len = r.read_u64::<LittleEndian>()?;
158
159    let reserved = r.read_u32::<LittleEndian>()?;
160
161    Ok(Self {
162      magic,
163      version,
164      mech_ver,
165      flags,
166      reg_count,
167      instr_count,
168      feature_count,
169      feature_off,
170      types_count,
171      types_off,
172      const_count,
173      const_tbl_off,
174      const_tbl_len,
175      const_blob_off,
176      const_blob_len,
177      instr_off,
178      instr_len,
179      symbols_len,
180      symbols_off,
181      dict_off,
182      dict_len,
183      reserved,
184    })
185  }
186
187  // Quick check: does the header magic match the expected magic?
188  pub fn validate_magic(&self, expected: &[u8;4]) -> bool {
189    &self.magic == expected
190  }
191}
192
193// 2. Features
194// ----------------------------------------------------------------------------
195
196#[repr(u16)]
197#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
198pub enum FeatureKind {
199  I8=1, I16, I32, I64, I128,
200  U8, U16, U32, U64, U128,
201
202  F32, F64, C64, R64, Index,
203  String, Bool, Atom, Set, Map, 
204  
205  Table, Tuple, Record, Enum,
206  VariableDefine, VariableAssign, KindDefine,
207  KindAnnotation, SubscriptRange, SubscriptFormula,
208  
209  RangeInclusive, RangeExclusive,
210  DotIndexing, Swizzle, LogicalIndexing,
211  Matrix1, Matrix2, Matrix3, Matrix4, Matrix2x3, 
212  
213  Matrix3x2, RowVector2, RowVector3, RowVector4,
214  Vector2, Vector3, Vector4, VectorD, MatrixD, RowVectorD,
215  
216  HorzCat, VertCat,
217  Compiler, PrettyPrint, Serde,
218  MatMul, Transpose, Dot, Cross, Add, 
219  
220  Sub, Mul, Div, Exp, Mod, 
221  Neg, OpAssign, LT, LTE, GT, 
222  
223  GTE, EQ, NEQ, And, Or, 
224  Xor, Not, Convert, Assign, Access,
225
226  Union, Intersection, Difference, Complement, Subset, 
227  Superset, ProperSubset, ProperSuperset, ElementOf, NotElementOf,
228
229  Functions, Formulas,
230  Custom = 0xFFFF,
231}
232
233impl FeatureKind {
234
235  pub fn as_string(&self) -> String {
236    match self {
237      FeatureKind::I8 => "i8".to_string(),
238      FeatureKind::I16 => "i16".to_string(),
239      FeatureKind::I32 => "i32".to_string(),
240      FeatureKind::I64 => "i64".to_string(),
241      FeatureKind::I128 => "i128".to_string(),
242      FeatureKind::U8 => "u8".to_string(),
243      FeatureKind::U16 => "u16".to_string(),
244      FeatureKind::U32 => "u32".to_string(),
245      FeatureKind::U64 => "u64".to_string(),
246      FeatureKind::U128 => "u128".to_string(),
247      FeatureKind::F32 => "f32".to_string(),
248      FeatureKind::F64 => "f64".to_string(),
249      FeatureKind::C64 => "c64".to_string(),
250      FeatureKind::R64 => "r64".to_string(),
251      FeatureKind::Index => "index".to_string(),
252      FeatureKind::String => "string".to_string(),
253      FeatureKind::Bool => "bool".to_string(),
254      FeatureKind::Atom => "atom".to_string(),
255      FeatureKind::Set => "set".to_string(),
256      FeatureKind::Map => "map".to_string(),
257      FeatureKind::Table => "table".to_string(),
258      FeatureKind::Tuple => "tuple".to_string(),
259      FeatureKind::Record => "record".to_string(),
260      FeatureKind::Enum => "enum".to_string(),
261      FeatureKind::VariableDefine => "variable_define".to_string(),
262      FeatureKind::VariableAssign => "variable_assign".to_string(),
263      FeatureKind::KindDefine => "kind_define".to_string(),
264      FeatureKind::KindAnnotation => "kind_annotation".to_string(),
265      FeatureKind::SubscriptRange => "subscript_range".to_string(),
266      FeatureKind::SubscriptFormula => "subscript_formula".to_string(),
267      FeatureKind::RangeInclusive => "range_inclusive".to_string(),
268      FeatureKind::RangeExclusive => "range_exclusive".to_string(),
269      FeatureKind::DotIndexing => "dot_indexing".to_string(),
270      FeatureKind::Swizzle => "swizzle".to_string(),
271      FeatureKind::LogicalIndexing => "logical_indexing".to_string(),
272      FeatureKind::Matrix1 => "matrix1".to_string(),
273      FeatureKind::Matrix2 => "matrix2".to_string(),
274      FeatureKind::Matrix3 => "matrix3".to_string(),
275      FeatureKind::Matrix4 => "matrix4".to_string(),
276      FeatureKind::Matrix2x3 => "matrix2x3".to_string(),
277      FeatureKind::Matrix3x2 => "matrix3x2".to_string(),
278      FeatureKind::RowVector2 => "row_vector2".to_string(),
279      FeatureKind::RowVector3 => "row_vector3".to_string(),
280      FeatureKind::RowVector4 => "row_vector4".to_string(),
281      FeatureKind::Vector2 => "vector2".to_string(),
282      FeatureKind::Vector3 => "vector3".to_string(),
283      FeatureKind::Vector4 => "vector4".to_string(),
284      FeatureKind::VectorD => "vectord".to_string(),
285      FeatureKind::MatrixD => "matrixd".to_string(),
286      FeatureKind::RowVectorD => "row_vectord".to_string(),
287      FeatureKind::HorzCat => "matrix_horzcat".to_string(),
288      FeatureKind::VertCat => "matrix_vertcat".to_string(),
289      FeatureKind::Compiler => "compiler".to_string(),
290      FeatureKind::PrettyPrint => "pretty_print".to_string(),
291      FeatureKind::Serde => "serde".to_string(),
292      FeatureKind::MatMul => "matrix_matmul".to_string(),
293      FeatureKind::Transpose => "matrix_transpose".to_string(),
294      FeatureKind::Dot => "matrix_dot".to_string(),
295      FeatureKind::Cross => "matrix_cross".to_string(),
296      FeatureKind::Add => "math_add".to_string(),
297      FeatureKind::Sub => "math_sub".to_string(),
298      FeatureKind::Mul => "math_mul".to_string(),
299      FeatureKind::Div => "math_div".to_string(),
300      FeatureKind::Exp => "math_exp".to_string(),
301      FeatureKind::Mod => "math_mod".to_string(),
302      FeatureKind::Neg => "math_neg".to_string(),
303      FeatureKind::OpAssign => "math_opassign".to_string(),
304      FeatureKind::LT => "compare_lt".to_string(),
305      FeatureKind::LTE => "compare_lte".to_string(),
306      FeatureKind::GT => "compare_gt".to_string(),
307      FeatureKind::GTE => "compare_gte".to_string(),
308      FeatureKind::EQ => "compare_eq".to_string(),
309      FeatureKind::NEQ => "compare_neq".to_string(),
310      FeatureKind::And => "logic_and".to_string(),
311      FeatureKind::Or => "logic_or".to_string(),
312      FeatureKind::Xor => "logic_xor".to_string(),
313      FeatureKind::Not => "logic_not".to_string(),
314      FeatureKind::Convert => "convert".to_string(),
315      FeatureKind::Assign => "assign".to_string(),
316      FeatureKind::Access => "access".to_string(),
317      FeatureKind::Union => "set_union".to_string(),
318      FeatureKind::Intersection => "set_intersection".to_string(),
319      FeatureKind::Difference => "set_difference".to_string(),
320      FeatureKind::Complement => "set_complement".to_string(),
321      FeatureKind::Subset => "set_subset".to_string(),
322      FeatureKind::Superset => "set_superset".to_string(),
323      FeatureKind::ProperSubset => "set_proper_subset".to_string(),
324      FeatureKind::ProperSuperset => "set_proper_superset".to_string(),
325      FeatureKind::ElementOf => "set_element_of".to_string(),
326      FeatureKind::NotElementOf => "set_not_element_of".to_string(),
327      FeatureKind::Functions => "functions".to_string(),
328      FeatureKind::Formulas => "formulas".to_string(),
329      FeatureKind::Custom => "custom".to_string(),
330    }
331  }
332}
333
334#[derive(Debug, Clone, PartialEq, Eq, Hash)]
335pub enum FeatureFlag {
336  Builtin(FeatureKind),
337  Custom(u64),
338}
339
340impl FeatureFlag {
341
342  pub fn as_string(&self) -> String {
343    match self {
344      FeatureFlag::Builtin(f) => f.as_string(),
345      FeatureFlag::Custom(c) => format!("custom({})", c),
346    }
347  }
348}
349
350impl FeatureFlag {
351  pub fn as_u64(&self) -> u64 {
352    match self {
353      FeatureFlag::Builtin(f) => *f as u64,
354      FeatureFlag::Custom(c) => *c,
355    }
356  }
357}
358
359// 3. Type Section
360// ----------------------------------------------------------------------------
361
362#[repr(u16)]
363#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
364#[derive(Debug, Clone, Copy, Eq, PartialEq)]
365pub enum TypeTag {
366  U8=1, U16, U32, U64, U128, I8, I16, I32, I64, I128,
367  F32, F64, C64, R64, String, Bool, Id, Index, Empty, Any,
368  MatrixU8, MatrixU16, MatrixU32, MatrixU64, MatrixU128,
369  MatrixI8, MatrixI16, MatrixI32, MatrixI64, MatrixI128,
370  MatrixF32, MatrixF64, MatrixC64, MatrixR64, MatrixBool, 
371  MatrixString, MatrixIndex,
372  EnumTag, Record, Map, Atom, 
373  Table, Tuple, Reference, Set, OptionT,
374}
375
376impl TypeTag {
377  pub fn from_u16(tag: u16) -> Option<Self> {
378    match tag {
379      1 => Some(TypeTag::U8), 2 => Some(TypeTag::U16), 3 => Some(TypeTag::U32), 4 => Some(TypeTag::U64), 5 => Some(TypeTag::U128),
380      6 => Some(TypeTag::I8), 7 => Some(TypeTag::I16), 8 => Some(TypeTag::I32), 9 => Some(TypeTag::I64), 10 => Some(TypeTag::I128),
381      11 => Some(TypeTag::F32), 12 => Some(TypeTag::F64), 13 => Some(TypeTag::C64), 14 => Some(TypeTag::R64),
382      15 => Some(TypeTag::String), 16 => Some(TypeTag::Bool), 17 => Some(TypeTag::Id), 18 => Some(TypeTag::Index), 19 => Some(TypeTag::Empty), 20 => Some(TypeTag::Any),
383      21 => Some(TypeTag::MatrixU8), 22 => Some(TypeTag::MatrixU16), 23 => Some(TypeTag::MatrixU32), 24 => Some(TypeTag::MatrixU64), 25 => Some(TypeTag::MatrixU128),
384      26 => Some(TypeTag::MatrixI8), 27 => Some(TypeTag::MatrixI16), 28 => Some(TypeTag::MatrixI32), 29 => Some(TypeTag::MatrixI64), 30 => Some(TypeTag::MatrixI128),
385      31 => Some(TypeTag::MatrixF32), 32 => Some(TypeTag::MatrixF64), 33 => Some(TypeTag::MatrixC64), 34 => Some(TypeTag::MatrixR64), 35 => Some(TypeTag::MatrixBool), 
386      36 => Some(TypeTag::MatrixString), 37 => Some(TypeTag::MatrixIndex),
387      38 => Some(TypeTag::EnumTag), 39 => Some(TypeTag::Record), 40 => Some(TypeTag::Map), 41 => Some(TypeTag::Atom), 
388      42 => Some(TypeTag::Table), 43 => Some(TypeTag::Tuple), 44 => Some(TypeTag::Reference), 45 => Some(TypeTag::Set), 46 => Some(TypeTag::OptionT),
389      _ => None,
390    }
391  }
392}
393
394#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
395#[derive(Debug, Clone, Eq, PartialEq)]
396pub struct TypeEntry {
397  pub tag: TypeTag,
398  pub bytes: Vec<u8>,
399}
400impl TypeEntry {
401  pub fn byte_len(&self) -> u64 {
402    2 + self.bytes.len() as u64
403  }
404}
405
406pub type TypeId = u32;
407
408#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
409#[derive(Default, Debug, Clone, Eq, PartialEq)]
410pub struct TypeSection {
411  pub interner: HashMap<ValueKind, TypeId>,
412  pub entries:  Vec<TypeEntry>, // index is TypeId
413}
414    
415impl TypeSection {
416
417  pub fn new() -> Self {
418    Self { interner: HashMap::new(), entries: Vec::new() }
419  }
420
421  pub fn get_or_intern(&mut self, vk: &ValueKind) -> TypeId {
422    if let Some(id) = self.interner.get(vk) { return *id; }
423    // recursively intern children and build payload
424    let (tag, mut bytes) = encode_value_kind(self, vk);
425    let id = self.entries.len() as u32;
426    self.entries.push(TypeEntry { tag, bytes });
427    self.interner.insert(vk.clone(), id);
428    id
429  }
430
431  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
432    w.write_u32::<LittleEndian>(self.entries.len() as u32)?;
433    for e in &self.entries {
434      w.write_u16::<LittleEndian>(e.tag as u16)?;
435      w.write_u16::<LittleEndian>(0)?;
436      w.write_u32::<LittleEndian>(1)?;
437      w.write_u32::<LittleEndian>(e.bytes.len() as u32)?;
438      w.write_all(&e.bytes)?;
439    }
440    Ok(())
441  }
442
443  pub fn byte_len(&self) -> u64 {
444    4 + self.entries.iter().map(|e| 12 + e.bytes.len() as u64).sum::<u64>()
445  }
446}
447
448// 4. Constants
449// ----------------------------------------------------------------------------
450
451#[repr(u8)]
452#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
453#[derive(Debug, Clone, Copy, Eq, PartialEq)]
454pub enum ConstEncoding { 
455  Inline = 1 
456}
457
458#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
459#[derive(Debug, Clone, Eq, PartialEq)]
460pub struct ConstEntry {
461  pub type_id: u32,
462  pub enc:     ConstEncoding,
463  pub align:   u8,
464  pub flags:   u8,
465  pub reserved:u16,
466  pub offset:  u64,
467  pub length:  u64,
468}
469
470impl ConstEntry {
471  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
472    w.write_u32::<LittleEndian>(self.type_id)?;
473    w.write_u8(self.enc as u8)?;
474    w.write_u8(self.align)?;
475    w.write_u8(self.flags)?;
476    w.write_u8(0)?; // pad to 4 bytes for the small fields
477    w.write_u64::<LittleEndian>(self.offset)?;
478    w.write_u64::<LittleEndian>(self.length)?;
479    Ok(())
480  }
481  pub fn byte_len() -> u64 { 4 + 1 + 1 + 1 + 1 + 8 + 8 } // = 24 bytes
482}
483
484// 5. Symbol Table
485// ----------------------------------------------------------------------------
486
487pub struct SymbolEntry {
488  pub id: u64,          // unique identifier for the symbol
489  pub mutable: bool,
490  pub reg: Register,    // register index this symbol maps to
491}
492
493impl SymbolEntry {
494
495  pub fn new(id: u64, mutable: bool, reg: Register) -> Self {
496    Self { id, mutable, reg }
497  }
498
499  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
500    w.write_u64::<LittleEndian>(self.id)?;
501    w.write_u8(if self.mutable { 1 } else { 0 })?;
502    w.write_u32::<LittleEndian>(self.reg)?;
503    Ok(())
504  }
505}
506
507// 6. Instruction Encoding (fixed forms)
508// ----------------------------------------------------------------------------
509
510#[repr(u8)]
511#[derive(Debug, Clone, Copy, PartialEq, Eq)]
512pub enum OpCode {
513  ConstLoad = 0x01,
514  NullOp    = 0x10,
515  Unop      = 0x20,
516  Binop     = 0x30,
517  Ternop    = 0x40,
518  Quadop    = 0x50,
519  VarArg    = 0x60,
520  Return    = 0xFF,
521}
522
523impl OpCode {
524  pub fn from_u8(num: u8) -> Option<OpCode> {
525    match num {
526      0x01 => Some(OpCode::ConstLoad),
527      0x10 => Some(OpCode::NullOp),
528      0x20 => Some(OpCode::Unop),
529      0x30 => Some(OpCode::Binop),
530      0x40 => Some(OpCode::Ternop),
531      0x50 => Some(OpCode::Quadop),
532      0x60 => Some(OpCode::VarArg),
533      0xFF => Some(OpCode::Return),
534      _    => None,
535    }
536  }
537}
538
539#[derive(Debug, Clone)]
540pub enum EncodedInstr {
541  ConstLoad { dst: u32, const_id: u32 },                               // [u64 opcode][u32 dst][u32 const_id]
542  NullOp    { fxn_id: u64, dst: u32 },                                 // [u64 opcode][u64 fxn_id][u32 dst]
543  UnOp      { fxn_id: u64, dst: u32, src: u32 },                       // [u64 opcode][u32 dst][u32 src]
544  BinOp     { fxn_id: u64, dst: u32, lhs: u32, rhs: u32 },             // [u64 opcode][u32 dst][u32 lhs][u32 rhs]
545  TernOp    { fxn_id: u64, dst: u32, a: u32, b: u32, c: u32 },         // [u64 opcode][u32 dst][u32 a][u32 b][u32 c]
546  QuadOp    { fxn_id: u64, dst: u32, a: u32, b: u32, c: u32, d: u32 }, // [u64 opcode][u32 dst][u32 a][u32 b][u32 c][u32 d]
547  VarArg    { fxn_id: u64, dst: u32, args: Vec<u32> },                 // [u64 opcode][u64 fxn_id][u32 dst][u32 arg_count][u32 args...]
548  Ret       { src: u32 },                                              // [u64 opcode][u32 src]
549}
550
551impl EncodedInstr {
552  pub fn byte_len(&self) -> u64 {
553    match self {
554      EncodedInstr::ConstLoad{..} => 1 + 4 + 4,
555      EncodedInstr::NullOp{..}    => 1 + 8 + 4,
556      EncodedInstr::UnOp{..}      => 1 + 8 + 4 + 4,
557      EncodedInstr::BinOp{..}     => 1 + 8 + 4 + 4 + 4,
558      EncodedInstr::TernOp{..}    => 1 + 8 + 4 + 4 + 4 + 4,
559      EncodedInstr::QuadOp{..}    => 1 + 8 + 4 + 4 + 4 + 4 + 4,
560      EncodedInstr::VarArg{ args, .. } => 1 + 8 + 4 + 4 + (4 * args.len() as u64),
561      EncodedInstr::Ret{..}       => 1 + 4,
562    }
563  }
564  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
565    match self {
566      EncodedInstr::ConstLoad{ dst, const_id } => {
567        w.write_u8(OpCode::ConstLoad as u8)?;
568        w.write_u32::<LittleEndian>(*dst)?;
569        w.write_u32::<LittleEndian>(*const_id)?;
570      }
571      EncodedInstr::NullOp{ fxn_id, dst } => {
572        w.write_u8(OpCode::NullOp as u8)?;
573        w.write_u64::<LittleEndian>(*fxn_id)?;
574        w.write_u32::<LittleEndian>(*dst)?;
575      }
576      EncodedInstr::UnOp{ fxn_id, dst, src } => {
577        w.write_u8(OpCode::Unop as u8)?;
578        w.write_u64::<LittleEndian>(*fxn_id)?;
579        w.write_u32::<LittleEndian>(*dst)?;
580        w.write_u32::<LittleEndian>(*src)?;
581      }
582      EncodedInstr::BinOp{ fxn_id, dst, lhs, rhs } => {
583        w.write_u8(OpCode::Binop as u8)?;
584        w.write_u64::<LittleEndian>(*fxn_id)?;
585        w.write_u32::<LittleEndian>(*dst)?;
586        w.write_u32::<LittleEndian>(*lhs)?;
587        w.write_u32::<LittleEndian>(*rhs)?;
588      }
589      EncodedInstr::TernOp{ fxn_id, dst, a, b, c } => {
590        w.write_u8(OpCode::Ternop as u8)?;
591        w.write_u64::<LittleEndian>(*fxn_id)?;
592        w.write_u32::<LittleEndian>(*dst)?;
593        w.write_u32::<LittleEndian>(*a)?;
594        w.write_u32::<LittleEndian>(*b)?;
595        w.write_u32::<LittleEndian>(*c)?;
596      }
597      EncodedInstr::QuadOp{ fxn_id, dst, a, b, c, d } => {
598        w.write_u8(OpCode::Quadop as u8)?;
599        w.write_u64::<LittleEndian>(*fxn_id)?;
600        w.write_u32::<LittleEndian>(*dst)?;
601        w.write_u32::<LittleEndian>(*a)?;
602        w.write_u32::<LittleEndian>(*b)?;
603        w.write_u32::<LittleEndian>(*c)?;
604        w.write_u32::<LittleEndian>(*d)?;
605      }
606      EncodedInstr::VarArg{ fxn_id, dst, args } => {
607        w.write_u8(OpCode::VarArg as u8)?;
608        w.write_u64::<LittleEndian>(*fxn_id)?;
609        w.write_u32::<LittleEndian>(*dst)?;
610        w.write_u32::<LittleEndian>(args.len() as u32)?;
611        for a in args {
612          w.write_u32::<LittleEndian>(*a)?;
613        }
614      }
615      EncodedInstr::Ret{ src } => {
616        w.write_u8(OpCode::Return as u8)?;
617        w.write_u32::<LittleEndian>(*src)?;
618      }
619    }
620    Ok(())
621  }
622}
623
624// 7. Dictionary
625// ----------------------------------------------------------------------------
626
627#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
628#[derive(Debug, Clone, Eq, PartialEq)]
629pub struct DictEntry {
630  pub id: u64,          // unique identifier for the dictionary entry
631  pub name: String,     // name of the entry
632} 
633
634impl DictEntry {
635  pub fn new(id: u64, name: &str) -> Self {
636    Self { id, name: name.to_string() }
637  }
638
639  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
640    w.write_u64::<LittleEndian>(self.id)?;
641    let name_bytes = self.name.as_bytes();
642    w.write_u32::<LittleEndian>(name_bytes.len() as u32)?;
643    w.write_all(name_bytes)?;
644    Ok(())
645  }
646}
647
648
mech_core/program/compiler/sections.rs

mech_core/program/compiler/
sections.rs
