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, Solve,
219  
220  Add, Sub, Mul, Div, Pow, Mod, 
221  Neg, OpAssign, LT, LTE, GT, 
222  
223  GTE, EQ, NEQ, And, Or, 
224  Xor, Not, Convert, Assign, Access,
225  Min, Max,
226
227  Union, Intersection, Difference, Complement, Subset, 
228  Superset, ProperSubset, ProperSuperset, ElementOf, NotElementOf,
229
230  Functions, Formulas,
231  Custom = 0xFFFF,
232}
233
234impl FeatureKind {
235
236  pub fn as_string(&self) -> String {
237    match self {
238      FeatureKind::I8 => "i8".to_string(),
239      FeatureKind::I16 => "i16".to_string(),
240      FeatureKind::I32 => "i32".to_string(),
241      FeatureKind::I64 => "i64".to_string(),
242      FeatureKind::I128 => "i128".to_string(),
243      FeatureKind::U8 => "u8".to_string(),
244      FeatureKind::U16 => "u16".to_string(),
245      FeatureKind::U32 => "u32".to_string(),
246      FeatureKind::U64 => "u64".to_string(),
247      FeatureKind::U128 => "u128".to_string(),
248      FeatureKind::F32 => "f32".to_string(),
249      FeatureKind::F64 => "f64".to_string(),
250      FeatureKind::C64 => "c64".to_string(),
251      FeatureKind::R64 => "r64".to_string(),
252      FeatureKind::Index => "index".to_string(),
253      FeatureKind::String => "string".to_string(),
254      FeatureKind::Bool => "bool".to_string(),
255      FeatureKind::Atom => "atom".to_string(),
256      FeatureKind::Set => "set".to_string(),
257      FeatureKind::Map => "map".to_string(),
258      FeatureKind::Table => "table".to_string(),
259      FeatureKind::Tuple => "tuple".to_string(),
260      FeatureKind::Record => "record".to_string(),
261      FeatureKind::Enum => "enum".to_string(),
262      FeatureKind::VariableDefine => "variable_define".to_string(),
263      FeatureKind::VariableAssign => "variable_assign".to_string(),
264      FeatureKind::KindDefine => "kind_define".to_string(),
265      FeatureKind::KindAnnotation => "kind_annotation".to_string(),
266      FeatureKind::SubscriptRange => "subscript_range".to_string(),
267      FeatureKind::SubscriptFormula => "subscript_formula".to_string(),
268      FeatureKind::RangeInclusive => "range_inclusive".to_string(),
269      FeatureKind::RangeExclusive => "range_exclusive".to_string(),
270      FeatureKind::DotIndexing => "dot_indexing".to_string(),
271      FeatureKind::Swizzle => "swizzle".to_string(),
272      FeatureKind::LogicalIndexing => "logical_indexing".to_string(),
273      FeatureKind::Matrix1 => "matrix1".to_string(),
274      FeatureKind::Matrix2 => "matrix2".to_string(),
275      FeatureKind::Matrix3 => "matrix3".to_string(),
276      FeatureKind::Matrix4 => "matrix4".to_string(),
277      FeatureKind::Matrix2x3 => "matrix2x3".to_string(),
278      FeatureKind::Matrix3x2 => "matrix3x2".to_string(),
279      FeatureKind::RowVector2 => "row_vector2".to_string(),
280      FeatureKind::RowVector3 => "row_vector3".to_string(),
281      FeatureKind::RowVector4 => "row_vector4".to_string(),
282      FeatureKind::Vector2 => "vector2".to_string(),
283      FeatureKind::Vector3 => "vector3".to_string(),
284      FeatureKind::Vector4 => "vector4".to_string(),
285      FeatureKind::VectorD => "vectord".to_string(),
286      FeatureKind::MatrixD => "matrixd".to_string(),
287      FeatureKind::RowVectorD => "row_vectord".to_string(),
288      FeatureKind::HorzCat => "matrix_horzcat".to_string(),
289      FeatureKind::VertCat => "matrix_vertcat".to_string(),
290      FeatureKind::Compiler => "compiler".to_string(),
291      FeatureKind::PrettyPrint => "pretty_print".to_string(),
292      FeatureKind::Serde => "serde".to_string(),
293      FeatureKind::MatMul => "matrix_matmul".to_string(),
294      FeatureKind::Transpose => "matrix_transpose".to_string(),
295      FeatureKind::Dot => "matrix_dot".to_string(),
296      FeatureKind::Solve => "matrix_solve".to_string(),
297      FeatureKind::Cross => "matrix_cross".to_string(),
298      FeatureKind::Add => "math_add".to_string(),
299      FeatureKind::Sub => "math_sub".to_string(),
300      FeatureKind::Mul => "math_mul".to_string(),
301      FeatureKind::Div => "math_div".to_string(),
302      FeatureKind::Pow => "math_pow".to_string(),
303      FeatureKind::Mod => "math_mod".to_string(),
304      FeatureKind::Neg => "math_neg".to_string(),
305      FeatureKind::OpAssign => "math_opassign".to_string(),
306      FeatureKind::LT => "compare_lt".to_string(),
307      FeatureKind::LTE => "compare_lte".to_string(),
308      FeatureKind::GT => "compare_gt".to_string(),
309      FeatureKind::GTE => "compare_gte".to_string(),
310      FeatureKind::EQ => "compare_eq".to_string(),
311      FeatureKind::NEQ => "compare_neq".to_string(),
312      FeatureKind::Min => "compare_min".to_string(),
313      FeatureKind::Max => "compare_max".to_string(),
314      FeatureKind::And => "logic_and".to_string(),
315      FeatureKind::Or => "logic_or".to_string(),
316      FeatureKind::Xor => "logic_xor".to_string(),
317      FeatureKind::Not => "logic_not".to_string(),
318      FeatureKind::Convert => "convert".to_string(),
319      FeatureKind::Assign => "assign".to_string(),
320      FeatureKind::Access => "access".to_string(),
321      FeatureKind::Union => "set_union".to_string(),
322      FeatureKind::Intersection => "set_intersection".to_string(),
323      FeatureKind::Difference => "set_difference".to_string(),
324      FeatureKind::Complement => "set_complement".to_string(),
325      FeatureKind::Subset => "set_subset".to_string(),
326      FeatureKind::Superset => "set_superset".to_string(),
327      FeatureKind::ProperSubset => "set_proper_subset".to_string(),
328      FeatureKind::ProperSuperset => "set_proper_superset".to_string(),
329      FeatureKind::ElementOf => "set_element_of".to_string(),
330      FeatureKind::NotElementOf => "set_not_element_of".to_string(),
331      FeatureKind::Functions => "functions".to_string(),
332      FeatureKind::Formulas => "formulas".to_string(),
333      FeatureKind::Custom => "custom".to_string(),
334    }
335  }
336}
337
338#[derive(Debug, Clone, PartialEq, Eq, Hash)]
339pub enum FeatureFlag {
340  Builtin(FeatureKind),
341  Custom(u64),
342}
343
344impl FeatureFlag {
345
346  pub fn as_string(&self) -> String {
347    match self {
348      FeatureFlag::Builtin(f) => f.as_string(),
349      FeatureFlag::Custom(c) => format!("custom({})", c),
350    }
351  }
352}
353
354impl FeatureFlag {
355  pub fn as_u64(&self) -> u64 {
356    match self {
357      FeatureFlag::Builtin(f) => *f as u64,
358      FeatureFlag::Custom(c) => *c,
359    }
360  }
361}
362
363// 3. Type Section
364// ----------------------------------------------------------------------------
365
366#[repr(u16)]
367#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
368#[derive(Debug, Clone, Copy, Eq, PartialEq)]
369pub enum TypeTag {
370  U8=1, U16, U32, U64, U128, I8, I16, I32, I64, I128,
371  F32, F64, C64, R64, String, Bool, Id, Index, Empty, Any,
372  MatrixU8, MatrixU16, MatrixU32, MatrixU64, MatrixU128,
373  MatrixI8, MatrixI16, MatrixI32, MatrixI64, MatrixI128,
374  MatrixF32, MatrixF64, MatrixC64, MatrixR64, MatrixBool, 
375  MatrixString, MatrixIndex,
376  EnumTag, Record, Map, Atom, 
377  Table, Tuple, Reference, Set, OptionT, None,
378}
379
380impl TypeTag {
381  pub fn from_u16(tag: u16) -> Option<Self> {
382    match tag {
383      1 => Some(TypeTag::U8), 2 => Some(TypeTag::U16), 3 => Some(TypeTag::U32), 4 => Some(TypeTag::U64), 5 => Some(TypeTag::U128),
384      6 => Some(TypeTag::I8), 7 => Some(TypeTag::I16), 8 => Some(TypeTag::I32), 9 => Some(TypeTag::I64), 10 => Some(TypeTag::I128),
385      11 => Some(TypeTag::F32), 12 => Some(TypeTag::F64), 13 => Some(TypeTag::C64), 14 => Some(TypeTag::R64),
386      15 => Some(TypeTag::String), 16 => Some(TypeTag::Bool), 17 => Some(TypeTag::Id), 18 => Some(TypeTag::Index), 19 => Some(TypeTag::Empty), 20 => Some(TypeTag::Any),
387      21 => Some(TypeTag::MatrixU8), 22 => Some(TypeTag::MatrixU16), 23 => Some(TypeTag::MatrixU32), 24 => Some(TypeTag::MatrixU64), 25 => Some(TypeTag::MatrixU128),
388      26 => Some(TypeTag::MatrixI8), 27 => Some(TypeTag::MatrixI16), 28 => Some(TypeTag::MatrixI32), 29 => Some(TypeTag::MatrixI64), 30 => Some(TypeTag::MatrixI128),
389      31 => Some(TypeTag::MatrixF32), 32 => Some(TypeTag::MatrixF64), 33 => Some(TypeTag::MatrixC64), 34 => Some(TypeTag::MatrixR64), 35 => Some(TypeTag::MatrixBool), 
390      36 => Some(TypeTag::MatrixString), 37 => Some(TypeTag::MatrixIndex),
391      38 => Some(TypeTag::EnumTag), 39 => Some(TypeTag::Record), 40 => Some(TypeTag::Map), 41 => Some(TypeTag::Atom), 
392      42 => Some(TypeTag::Table), 43 => Some(TypeTag::Tuple), 44 => Some(TypeTag::Reference), 45 => Some(TypeTag::Set), 46 => Some(TypeTag::OptionT), 47 => Some(TypeTag::None),
393      _ => None,
394    }
395  }
396}
397
398#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
399#[derive(Debug, Clone, Eq, PartialEq)]
400pub struct TypeEntry {
401  pub tag: TypeTag,
402  pub bytes: Vec<u8>,
403}
404impl TypeEntry {
405  pub fn byte_len(&self) -> u64 {
406    2 + self.bytes.len() as u64
407  }
408}
409
410pub type TypeId = u32;
411
412#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
413#[derive(Default, Debug, Clone, Eq, PartialEq)]
414pub struct TypeSection {
415  pub interner: HashMap<ValueKind, TypeId>,
416  pub entries:  Vec<TypeEntry>, // index is TypeId
417}
418    
419impl TypeSection {
420
421  pub fn new() -> Self {
422    Self { interner: HashMap::new(), entries: Vec::new() }
423  }
424
425  pub fn get_or_intern(&mut self, vk: &ValueKind) -> TypeId {
426    if let Some(id) = self.interner.get(vk) { return *id; }
427    // recursively intern children and build payload
428    let (tag, mut bytes) = encode_value_kind(self, vk);
429    let id = self.entries.len() as u32;
430    self.entries.push(TypeEntry { tag, bytes });
431    self.interner.insert(vk.clone(), id);
432    id
433  }
434
435  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
436    w.write_u32::<LittleEndian>(self.entries.len() as u32)?;
437    for e in &self.entries {
438      w.write_u16::<LittleEndian>(e.tag as u16)?;
439      w.write_u16::<LittleEndian>(0)?;
440      w.write_u32::<LittleEndian>(1)?;
441      w.write_u32::<LittleEndian>(e.bytes.len() as u32)?;
442      w.write_all(&e.bytes)?;
443    }
444    Ok(())
445  }
446
447  pub fn byte_len(&self) -> u64 {
448    4 + self.entries.iter().map(|e| 12 + e.bytes.len() as u64).sum::<u64>()
449  }
450}
451
452// 4. Constants
453// ----------------------------------------------------------------------------
454
455#[repr(u8)]
456#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
457#[derive(Debug, Clone, Copy, Eq, PartialEq)]
458pub enum ConstEncoding { 
459  Inline = 1 
460}
461
462#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
463#[derive(Debug, Clone, Eq, PartialEq)]
464pub struct ConstEntry {
465  pub type_id: u32,
466  pub enc:     ConstEncoding,
467  pub align:   u8,
468  pub flags:   u8,
469  pub reserved:u16,
470  pub offset:  u64,
471  pub length:  u64,
472}
473
474impl ConstEntry {
475  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
476    w.write_u32::<LittleEndian>(self.type_id)?;
477    w.write_u8(self.enc as u8)?;
478    w.write_u8(self.align)?;
479    w.write_u8(self.flags)?;
480    w.write_u8(0)?; // pad to 4 bytes for the small fields
481    w.write_u64::<LittleEndian>(self.offset)?;
482    w.write_u64::<LittleEndian>(self.length)?;
483    Ok(())
484  }
485  pub fn byte_len() -> u64 { 4 + 1 + 1 + 1 + 1 + 8 + 8 } // = 24 bytes
486}
487
488// 5. Symbol Table
489// ----------------------------------------------------------------------------
490
491pub struct SymbolEntry {
492  pub id: u64,          // unique identifier for the symbol
493  pub mutable: bool,
494  pub reg: Register,    // register index this symbol maps to
495}
496
497impl SymbolEntry {
498
499  pub fn new(id: u64, mutable: bool, reg: Register) -> Self {
500    Self { id, mutable, reg }
501  }
502
503  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
504    w.write_u64::<LittleEndian>(self.id)?;
505    w.write_u8(if self.mutable { 1 } else { 0 })?;
506    w.write_u32::<LittleEndian>(self.reg)?;
507    Ok(())
508  }
509}
510
511// 6. Instruction Encoding (fixed forms)
512// ----------------------------------------------------------------------------
513
514#[repr(u8)]
515#[derive(Debug, Clone, Copy, PartialEq, Eq)]
516pub enum OpCode {
517  ConstLoad = 0x01,
518  NullOp    = 0x10,
519  Unop      = 0x20,
520  Binop     = 0x30,
521  Ternop    = 0x40,
522  Quadop    = 0x50,
523  VarArg    = 0x60,
524  Return    = 0xFF,
525}
526
527impl std::fmt::Display for OpCode {
528  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
529    let s = match self {
530      OpCode::ConstLoad => "ConstLoad",
531      OpCode::NullOp    => "NullOp",
532      OpCode::Unop      => "Unop",
533      OpCode::Binop     => "Binop",
534      OpCode::Ternop    => "Ternop",
535      OpCode::Quadop    => "Quadop",
536      OpCode::VarArg    => "VarArg",
537      OpCode::Return    => "Return",
538    };
539    write!(f, "{}", s)
540  }
541}
542
543impl OpCode {
544  pub fn from_u8(num: u8) -> Option<OpCode> {
545    match num {
546      0x01 => Some(OpCode::ConstLoad),
547      0x10 => Some(OpCode::NullOp),
548      0x20 => Some(OpCode::Unop),
549      0x30 => Some(OpCode::Binop),
550      0x40 => Some(OpCode::Ternop),
551      0x50 => Some(OpCode::Quadop),
552      0x60 => Some(OpCode::VarArg),
553      0xFF => Some(OpCode::Return),
554      _    => None,
555    }
556  }
557}
558
559#[derive(Debug, Clone)]
560pub enum EncodedInstr {
561  ConstLoad { dst: u32, const_id: u32 },                               // [u64 opcode][u32 dst][u32 const_id]
562  NullOp    { fxn_id: u64, dst: u32 },                                 // [u64 opcode][u64 fxn_id][u32 dst]
563  UnOp      { fxn_id: u64, dst: u32, src: u32 },                       // [u64 opcode][u32 dst][u32 src]
564  BinOp     { fxn_id: u64, dst: u32, lhs: u32, rhs: u32 },             // [u64 opcode][u32 dst][u32 lhs][u32 rhs]
565  TernOp    { fxn_id: u64, dst: u32, a: u32, b: u32, c: u32 },         // [u64 opcode][u32 dst][u32 a][u32 b][u32 c]
566  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]
567  VarArg    { fxn_id: u64, dst: u32, args: Vec<u32> },                 // [u64 opcode][u64 fxn_id][u32 dst][u32 arg_count][u32 args...]
568  Ret       { src: u32 },                                              // [u64 opcode][u32 src]
569}
570
571impl EncodedInstr {
572  pub fn byte_len(&self) -> u64 {
573    match self {
574      EncodedInstr::ConstLoad{..} => 1 + 4 + 4,
575      EncodedInstr::NullOp{..}    => 1 + 8 + 4,
576      EncodedInstr::UnOp{..}      => 1 + 8 + 4 + 4,
577      EncodedInstr::BinOp{..}     => 1 + 8 + 4 + 4 + 4,
578      EncodedInstr::TernOp{..}    => 1 + 8 + 4 + 4 + 4 + 4,
579      EncodedInstr::QuadOp{..}    => 1 + 8 + 4 + 4 + 4 + 4 + 4,
580      EncodedInstr::VarArg{ args, .. } => 1 + 8 + 4 + 4 + (4 * args.len() as u64),
581      EncodedInstr::Ret{..}       => 1 + 4,
582    }
583  }
584  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
585    match self {
586      EncodedInstr::ConstLoad{ dst, const_id } => {
587        w.write_u8(OpCode::ConstLoad as u8)?;
588        w.write_u32::<LittleEndian>(*dst)?;
589        w.write_u32::<LittleEndian>(*const_id)?;
590      }
591      EncodedInstr::NullOp{ fxn_id, dst } => {
592        w.write_u8(OpCode::NullOp as u8)?;
593        w.write_u64::<LittleEndian>(*fxn_id)?;
594        w.write_u32::<LittleEndian>(*dst)?;
595      }
596      EncodedInstr::UnOp{ fxn_id, dst, src } => {
597        w.write_u8(OpCode::Unop as u8)?;
598        w.write_u64::<LittleEndian>(*fxn_id)?;
599        w.write_u32::<LittleEndian>(*dst)?;
600        w.write_u32::<LittleEndian>(*src)?;
601      }
602      EncodedInstr::BinOp{ fxn_id, dst, lhs, rhs } => {
603        w.write_u8(OpCode::Binop as u8)?;
604        w.write_u64::<LittleEndian>(*fxn_id)?;
605        w.write_u32::<LittleEndian>(*dst)?;
606        w.write_u32::<LittleEndian>(*lhs)?;
607        w.write_u32::<LittleEndian>(*rhs)?;
608      }
609      EncodedInstr::TernOp{ fxn_id, dst, a, b, c } => {
610        w.write_u8(OpCode::Ternop as u8)?;
611        w.write_u64::<LittleEndian>(*fxn_id)?;
612        w.write_u32::<LittleEndian>(*dst)?;
613        w.write_u32::<LittleEndian>(*a)?;
614        w.write_u32::<LittleEndian>(*b)?;
615        w.write_u32::<LittleEndian>(*c)?;
616      }
617      EncodedInstr::QuadOp{ fxn_id, dst, a, b, c, d } => {
618        w.write_u8(OpCode::Quadop as u8)?;
619        w.write_u64::<LittleEndian>(*fxn_id)?;
620        w.write_u32::<LittleEndian>(*dst)?;
621        w.write_u32::<LittleEndian>(*a)?;
622        w.write_u32::<LittleEndian>(*b)?;
623        w.write_u32::<LittleEndian>(*c)?;
624        w.write_u32::<LittleEndian>(*d)?;
625      }
626      EncodedInstr::VarArg{ fxn_id, dst, args } => {
627        w.write_u8(OpCode::VarArg as u8)?;
628        w.write_u64::<LittleEndian>(*fxn_id)?;
629        w.write_u32::<LittleEndian>(*dst)?;
630        w.write_u32::<LittleEndian>(args.len() as u32)?;
631        for a in args {
632          w.write_u32::<LittleEndian>(*a)?;
633        }
634      }
635      EncodedInstr::Ret{ src } => {
636        w.write_u8(OpCode::Return as u8)?;
637        w.write_u32::<LittleEndian>(*src)?;
638      }
639    }
640    Ok(())
641  }
642}
643
644// 7. Dictionary
645// ----------------------------------------------------------------------------
646
647#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
648#[derive(Debug, Clone, Eq, PartialEq)]
649pub struct DictEntry {
650  pub id: u64,          // unique identifier for the dictionary entry
651  pub name: String,     // name of the entry
652} 
653
654impl DictEntry {
655  pub fn new(id: u64, name: &str) -> Self {
656    Self { id, name: name.to_string() }
657  }
658
659  pub fn write_to(&self, w: &mut impl Write) -> MResult<()> {
660    w.write_u64::<LittleEndian>(self.id)?;
661    let name_bytes = self.name.as_bytes();
662    w.write_u32::<LittleEndian>(name_bytes.len() as u32)?;
663    w.write_all(name_bytes)?;
664    Ok(())
665  }
666}
667
668
mech_core/program/compiler/sections.rs

mech_core/program/compiler/
sections.rs
