1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
//! # The `impl_instructions!` macro
//!
//! The heart of this crate's implementation is the private `impl_instructions!` macro.
//! This macro is used to generate the `Instruction` and `Opcode` types along with their
//! implementations.
//!
//! The intention is to allow for having a single source of truth from which each of the
//! instruction-related types and implementations are derived.
//!
//! Its usage looks like this:
//!
//! ```rust,ignore
//! impl_instructions! {
//! "Adds two registers."
//! 0x10 ADD add [RegId RegId RegId]
//! "Bitwise ANDs two registers."
//! 0x11 AND and [RegId RegId RegId]
//! // ...
//! }
//! ```
//!
//! Each instruction's row includes:
//!
//! - A short docstring.
//! - The Opcode byte value.
//! - An uppercase identifier (for generating variants and types).
//! - A lowercase identifier (for generating the shorthand instruction constructor).
//! - The instruction layout (for the `new` and `unpack` functions).
//!
//! The following sections describe each of the items that are derived from the
//! `impl_instructions!` table in more detail.
//!
//! ## The `Opcode` enum
//!
//! Represents the bytecode portion of an instruction.
//!
//! ```rust,ignore
//! /// Solely the opcode portion of an instruction represented as a single byte.
//! #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
//! #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
//! #[repr(u8)]
//! pub enum Opcode {
//! /// Adds two registers.
//! ADD = 0x10,
//! /// Bitwise ANDs two registers.
//! AND = 0x11,
//! // ...
//! }
//! ```
//!
//! A `TryFrom<u8>` implementation is also provided, producing an `Err(InvalidOpcode)` in
//! the case that the byte represents a reserved or undefined value.
//!
//! ```rust
//! # use fuel_asm::{InvalidOpcode, Opcode};
//! assert_eq!(Opcode::try_from(0x10), Ok(Opcode::ADD));
//! assert_eq!(Opcode::try_from(0x11), Ok(Opcode::AND));
//! assert_eq!(Opcode::try_from(0), Err(InvalidOpcode));
//! ```
//!
//! ## The `Instruction` enum
//!
//! Represents a single, full instruction, discriminated by its `Opcode`.
//!
//! ```rust,ignore
//! /// Representation of a single instruction for the interpreter.
//! ///
//! /// The opcode is represented in the tag (variant), or may be retrieved in the form of an
//! /// `Opcode` byte using the `opcode` method.
//! ///
//! /// The register and immediate data associated with the instruction is represented within
//! /// an inner unit type wrapper around the 3 remaining bytes.
//! #[derive(Clone, Copy, Eq, Hash, PartialEq)]
//! #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
//! pub enum Instruction {
//! /// Adds two registers.
//! ADD(op::ADD),
//! /// Bitwise ANDs two registers.
//! AND(op::AND),
//! // ...
//! }
//! ```
//!
//! The `From<Instruction> for u32` (aka `RawInstruction`) and `TryFrom<u32> for
//! Instruction` implementations can be found in the crate root.
//!
//! ## A unique unit type per operation
//!
//! In order to reduce the likelihood of misusing unrelated register IDs or immediate
//! values, we generate a unique unit type for each type of operation (i.e instruction
//! variant) and guard access to the relevant register IDs and immediate values behind
//! each type's unique methods.
//!
//! These unique operation types are generated as follows within a dedicated `op` module:
//!
//! ```rust,ignore
//! pub mod op {
//! //! Definitions and implementations for each unique instruction type, one for each
//! //! unique `Opcode` variant.
//!
//! // A unique type for each operation.
//!
//! /// Adds two registers.
//! pub struct ADD([u8; 3]);
//!
//! /// Bitwise ANDs two registers.
//! pub struct AND([u8; 3]);
//!
//! // ...
//!
//! // An implementation for each unique type.
//!
//! impl ADD {
//! pub const OPCODE: Opcode = Opcode::ADD;
//!
//! /// Construct the instruction from its parts.
//! pub fn new(ra: RegId, rb: RegId, rc: RegId) -> Self {
//! Self(pack::bytes_from_ra_rb_rc(ra, rb, rc))
//! }
//!
//! /// Convert the instruction into its parts.
//! pub fn unpack(self) -> (RegId, RegId, RegId) {
//! unpack::ra_rb_rc_from_bytes(self.0)
//! }
//! }
//!
//! impl AND {
//! // ...
//! }
//!
//! // ...
//!
//! // A short-hand `Instruction` constructor for each operation to make it easier to
//! // hand-write assembly for tests and benchmarking. As these constructors are public and
//! // accept literal values, we check that the values are within range.
//!
//! /// Adds two registers.
//! pub fn add(ra: u8, rb: u8, rc: u8) -> Instruction {
//! ADD::new(check_reg_id(ra), check_reg_id(rb), check_reg_id(rc)).into()
//! }
//!
//! /// Bitwise ANDs two registers.
//! pub fn and(ra: u8, rb: u8, rc: u8) -> Instruction {
//! AND::new(check_reg_id(ra), check_reg_id(rb), check_reg_id(rc)).into()
//! }
//!
//! // ...
//! };
//! ```
//!
//! ### Instruction Layout
//!
//! The function signatures of the `new` and `unpack` functions are derived from the
//! instruction's data layout described in the `impl_instructions!` table.
//!
//! For example, the `unpack` method for `ADD` looks like this:
//!
//! ```rust,ignore
//! // 0x10 ADD add [RegId RegId RegId]
//! pub fn unpack(self) -> (RegId, RegId, RegId)
//! ```
//!
//! While the `unpack` method for `ADDI` looks like this:
//!
//! ```rust,ignore
//! // 0x50 ADDI addi [RegId RegId Imm12]
//! pub fn unpack(self) -> (RegId, RegId, Imm12)
//! ```
//!
//! ### Shorthand Constructors
//!
//! The shorthand instruction constructors (e.g. `add`, `and`, etc) are specifically
//! designed to make it easier to handwrite assembly for tests or benchmarking. Unlike the
//! `$OP::new` constructors which require typed register ID or immediate inputs, the
//! instruction constructors allow for constructing `Instruction`s from convenient literal
//! value inputs. E.g.
//!
//! ```rust
//! use fuel_asm::{op, Instruction};
//!
//! // A sample program to perform ecrecover
//! let program: Vec<Instruction> = vec![
//! op::move_(0x10, 0x01), // set r[0x10] := $one
//! op::slli(0x20, 0x10, 5), // set r[0x20] := `r[0x10] << 5 == 32`
//! op::slli(0x21, 0x10, 6), // set r[0x21] := `r[0x10] << 6 == 64`
//! op::aloc(0x21), // alloc `r[0x21] == 64` to the heap
//! op::addi(0x10, 0x07, 1), // set r[0x10] := `$hp + 1` (allocated heap)
//! op::move_(0x11, 0x04), // set r[0x11] := $ssp
//! op::add(0x12, 0x04, 0x20), // set r[0x12] := `$ssp + r[0x20]`
//! op::eck1(0x10, 0x11, 0x12),// recover public key in memory[r[0x10], 64]
//! op::ret(0x01), // return `1`
//! ];
//! ```
// Generate a shorthand free function named after the $op for constructing an
// `Instruction`.
macro_rules! op_constructor {
($doc:literal $Op:ident $op:ident[$ra:ident : RegId]) => {
#[doc = $doc]
pub fn $op<A: CheckRegId>($ra: A) -> Instruction {
$Op::new($ra.check()).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8) -> typescript::Instruction {
crate::op::$op($ra).into()
}
};
};
($doc:literal $Op:ident $op:ident[$ra:ident : RegId $rb:ident : RegId]) => {
#[doc = $doc]
pub fn $op<A: CheckRegId, B: CheckRegId>($ra: A, $rb: B) -> Instruction {
$Op::new($ra.check(), $rb.check()).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $rb: u8) -> typescript::Instruction {
crate::op::$op($ra, $rb).into()
}
};
};
(
$doc:literal
$Op:ident
$op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId]
) => {
#[doc = $doc]
pub fn $op<A: CheckRegId, B: CheckRegId, C: CheckRegId>(
$ra: A,
$rb: B,
$rc: C,
) -> Instruction {
$Op::new($ra.check(), $rb.check(), $rc.check()).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $rb: u8, $rc: u8) -> typescript::Instruction {
crate::op::$op($ra, $rb, $rc).into()
}
};
};
(
$doc:literal
$Op:ident
$op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId $rd:ident : RegId]
) => {
#[doc = $doc]
pub fn $op<A: CheckRegId, B: CheckRegId, C: CheckRegId, D: CheckRegId>(
$ra: A,
$rb: B,
$rc: C,
$rd: D,
) -> Instruction {
$Op::new($ra.check(), $rb.check(), $rc.check(), $rd.check()).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $rb: u8, $rc: u8, $rd: u8) -> typescript::Instruction {
crate::op::$op($ra, $rb, $rc, $rd).into()
}
};
};
(
$doc:literal
$Op:ident
$op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId $imm:ident : Imm06]
) => {
#[doc = $doc]
pub fn $op<A: CheckRegId, B: CheckRegId, C: CheckRegId>(
$ra: A,
$rb: B,
$rc: C,
$imm: u8,
) -> Instruction {
$Op::new($ra.check(), $rb.check(), $rc.check(), check_imm06($imm)).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $rb: u8, $rc: u8, $imm: u8) -> typescript::Instruction {
crate::op::$op($ra, $rb, $rc, $imm).into()
}
};
};
(
$doc:literal
$Op:ident
$op:ident[$ra:ident : RegId $rb:ident : RegId $imm:ident : Imm12]
) => {
#[doc = $doc]
pub fn $op<A: CheckRegId, B: CheckRegId>(
$ra: A,
$rb: B,
$imm: u16,
) -> Instruction {
$Op::new($ra.check(), $rb.check(), check_imm12($imm)).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $rb: u8, $imm: u16) -> typescript::Instruction {
crate::op::$op($ra, $rb, $imm).into()
}
};
};
($doc:literal $Op:ident $op:ident[$ra:ident : RegId $imm:ident : Imm18]) => {
#[doc = $doc]
pub fn $op<A: CheckRegId>($ra: A, $imm: u32) -> Instruction {
$Op::new($ra.check(), check_imm18($imm)).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($ra: u8, $imm: u32) -> typescript::Instruction {
crate::op::$op($ra, $imm).into()
}
};
};
($doc:literal $Op:ident $op:ident[$imm:ident : Imm24]) => {
#[doc = $doc]
pub fn $op($imm: u32) -> Instruction {
$Op::new(check_imm24($imm)).into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op($imm: u32) -> typescript::Instruction {
crate::op::$op($imm).into()
}
};
};
($doc:literal $Op:ident $op:ident[]) => {
#[doc = $doc]
pub fn $op() -> Instruction {
$Op::new().into()
}
#[cfg(feature = "typescript")]
const _: () = {
use super::*;
#[wasm_bindgen::prelude::wasm_bindgen]
#[doc = $doc]
pub fn $op() -> typescript::Instruction {
crate::op::$op().into()
}
};
};
}
// Generate approriate `new` constructor for the instruction
macro_rules! op_new {
// Generate a constructor based on the field layout.
($Op:ident $ra:ident : RegId) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId) -> Self {
Self(pack::bytes_from_ra($ra))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($ra: RegId) -> Self {
Self::new($ra)
}
}
};
($Op:ident $ra:ident : RegId $rb:ident : RegId) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $rb: RegId) -> Self {
Self(pack::bytes_from_ra_rb($ra, $rb))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($ra: RegId, $rb: RegId) -> Self {
Self::new($ra, $rb)
}
}
};
($Op:ident $ra:ident : RegId $rb:ident : RegId $rc:ident : RegId) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $rb: RegId, $rc: RegId) -> Self {
Self(pack::bytes_from_ra_rb_rc($ra, $rb, $rc))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($ra: RegId, $rb: RegId, $rc: RegId) -> Self {
Self::new($ra, $rb, $rc)
}
}
};
(
$Op:ident $ra:ident : RegId $rb:ident : RegId $rc:ident : RegId $rd:ident : RegId
) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $rb: RegId, $rc: RegId, $rd: RegId) -> Self {
Self(pack::bytes_from_ra_rb_rc_rd($ra, $rb, $rc, $rd))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript(
$ra: RegId,
$rb: RegId,
$rc: RegId,
$rd: RegId,
) -> Self {
Self::new($ra, $rb, $rc, $rd)
}
}
};
(
$Op:ident
$ra:ident : RegId
$rb:ident : RegId
$rc:ident : RegId
$imm:ident : Imm06
) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $rb: RegId, $rc: RegId, $imm: Imm06) -> Self {
Self(pack::bytes_from_ra_rb_rc_imm06($ra, $rb, $rc, $imm))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript(
$ra: RegId,
$rb: RegId,
$rc: RegId,
$imm: Imm06,
) -> Self {
Self::new($ra, $rb, $rc, $imm)
}
}
};
($Op:ident $ra:ident : RegId $rb:ident : RegId $imm:ident : Imm12) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $rb: RegId, $imm: Imm12) -> Self {
Self(pack::bytes_from_ra_rb_imm12($ra, $rb, $imm))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($ra: RegId, $rb: RegId, $imm: Imm12) -> Self {
Self::new($ra, $rb, $imm)
}
}
};
($Op:ident $ra:ident : RegId $imm:ident : Imm18) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($ra: RegId, $imm: Imm18) -> Self {
Self(pack::bytes_from_ra_imm18($ra, $imm))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($ra: RegId, $imm: Imm18) -> Self {
Self::new($ra, $imm)
}
}
};
($Op:ident $imm:ident : Imm24) => {
impl $Op {
/// Construct the instruction from its parts.
pub fn new($imm: Imm24) -> Self {
Self(pack::bytes_from_imm24($imm))
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction from its parts.
pub fn new_typescript($imm: Imm24) -> Self {
Self::new($imm)
}
}
};
($Op:ident) => {
impl $Op {
/// Construct the instruction.
#[allow(clippy::new_without_default)]
pub fn new() -> Self {
Self([0; 3])
}
}
#[cfg(feature = "typescript")]
#[wasm_bindgen::prelude::wasm_bindgen]
impl $Op {
#[wasm_bindgen(constructor)]
/// Construct the instruction.
#[allow(clippy::new_without_default)]
pub fn new_typescript() -> Self {
Self::new()
}
}
};
}
// Generate an accessor method for each field. Recurse based on layout.
macro_rules! op_accessors {
($Op:ident $ra:ident: RegId) => {
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the ID for register A.
pub fn ra(&self) -> RegId {
unpack::ra_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $rb:ident: RegId) => {
op_accessors!($Op ra: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the ID for register B.
pub fn rb(&self) -> RegId {
unpack::rb_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $rb:ident: RegId $rc:ident: RegId) => {
op_accessors!($Op $ra: RegId $rb: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the ID for register C.
pub fn rc(&self) -> RegId {
unpack::rc_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $rb:ident: RegId $rc:ident: RegId $rd:ident: RegId) => {
op_accessors!($Op $ra: RegId $rb: RegId $rc: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the ID for register D.
pub fn rd(&self) -> RegId {
unpack::rd_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $rb:ident: RegId $rc:ident: RegId $imm:ident: Imm06) => {
op_accessors!($Op $ra: RegId rb: RegId $rc: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the 6-bit immediate value.
pub fn imm06(&self) -> Imm06 {
unpack::imm06_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $rb:ident: RegId $imm:ident: Imm12) => {
op_accessors!($Op $ra: RegId $rb: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the 12-bit immediate value.
pub fn imm12(&self) -> Imm12 {
unpack::imm12_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: RegId $imm:ident: Imm18) => {
op_accessors!($Op $ra: RegId);
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the 18-bit immediate value.
pub fn imm18(&self) -> Imm18 {
unpack::imm18_from_bytes(self.0)
}
}
};
($Op:ident $ra:ident: Imm24) => {
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
impl $Op {
/// Access the 24-bit immediate value.
pub fn imm24(&self) -> Imm24 {
unpack::imm24_from_bytes(self.0)
}
}
};
($Op:ident) => {};
}
// Generate a method for converting the instruction into its parts.
macro_rules! op_unpack {
(RegId) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> RegId {
unpack::ra_from_bytes(self.0)
}
};
(RegId RegId) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, RegId) {
unpack::ra_rb_from_bytes(self.0)
}
};
(RegId RegId RegId) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, RegId, RegId) {
unpack::ra_rb_rc_from_bytes(self.0)
}
};
(RegId RegId RegId RegId) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, RegId, RegId, RegId) {
unpack::ra_rb_rc_rd_from_bytes(self.0)
}
};
(RegId RegId RegId Imm06) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, RegId, RegId, Imm06) {
unpack::ra_rb_rc_imm06_from_bytes(self.0)
}
};
(RegId RegId Imm12) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, RegId, Imm12) {
unpack::ra_rb_imm12_from_bytes(self.0)
}
};
(RegId Imm18) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> (RegId, Imm18) {
unpack::ra_imm18_from_bytes(self.0)
}
};
(Imm24) => {
/// Convert the instruction into its parts.
pub fn unpack(self) -> Imm24 {
unpack::imm24_from_bytes(self.0)
}
};
() => {};
}
// Generate a private fn for use within the `Instruction::reg_ids` implementation.
macro_rules! op_reg_ids {
(RegId) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let ra = self.unpack();
[Some(ra), None, None, None]
}
};
(RegId RegId) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, rb) = self.unpack();
[Some(ra), Some(rb), None, None]
}
};
(RegId RegId RegId) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, rb, rc) = self.unpack();
[Some(ra), Some(rb), Some(rc), None]
}
};
(RegId RegId RegId RegId) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, rb, rc, rd) = self.unpack();
[Some(ra), Some(rb), Some(rc), Some(rd)]
}
};
(RegId RegId RegId Imm06) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, rb, rc, _) = self.unpack();
[Some(ra), Some(rb), Some(rc), None]
}
};
(RegId RegId Imm12) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, rb, _) = self.unpack();
[Some(ra), Some(rb), None, None]
}
};
(RegId Imm18) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
let (ra, _) = self.unpack();
[Some(ra), None, None, None]
}
};
($($rest:tt)*) => {
pub(super) fn reg_ids(&self) -> [Option<RegId>; 4] {
[None; 4]
}
};
}
// Generate test constructors that can be used to generate instructions from non-matching
// input.
#[cfg(test)]
macro_rules! op_test_construct_fn {
(RegId) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
_rb: RegId,
_rc: RegId,
_rd: RegId,
_imm: u32,
) -> Self {
Self(pack::bytes_from_ra(ra))
}
};
(RegId RegId) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
rb: RegId,
_rc: RegId,
_rd: RegId,
_imm: u32,
) -> Self {
Self(pack::bytes_from_ra_rb(ra, rb))
}
};
(RegId RegId RegId) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
rb: RegId,
rc: RegId,
_rd: RegId,
_imm: u32,
) -> Self {
Self(pack::bytes_from_ra_rb_rc(ra, rb, rc))
}
};
(RegId RegId RegId RegId) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
rb: RegId,
rc: RegId,
rd: RegId,
_imm: u32,
) -> Self {
Self(pack::bytes_from_ra_rb_rc_rd(ra, rb, rc, rd))
}
};
(RegId RegId RegId Imm06) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
rb: RegId,
rc: RegId,
_rd: RegId,
imm: u32,
) -> Self {
Self(pack::bytes_from_ra_rb_rc_imm06(
ra,
rb,
rc,
Imm06::from(imm as u8),
))
}
};
(RegId RegId Imm12) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
rb: RegId,
_rc: RegId,
_rd: RegId,
imm: u32,
) -> Self {
Self(pack::bytes_from_ra_rb_imm12(
ra,
rb,
Imm12::from(imm as u16),
))
}
};
(RegId Imm18) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
ra: RegId,
_rb: RegId,
_rc: RegId,
_rd: RegId,
imm: u32,
) -> Self {
Self(pack::bytes_from_ra_imm18(ra, Imm18::from(imm)))
}
};
(Imm24) => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
pub fn test_construct(
_ra: RegId,
_rb: RegId,
_rc: RegId,
_rd: RegId,
imm: u32,
) -> Self {
Self(pack::bytes_from_imm24(Imm24::from(imm)))
}
};
() => {
/// Construct the instruction from all possible raw fields, ignoring inapplicable
/// ones.
#[allow(clippy::new_without_default)]
pub fn test_construct(
_ra: RegId,
_rb: RegId,
_rc: RegId,
_rd: RegId,
_imm: u32,
) -> Self {
Self([0; 3])
}
};
}
// Debug implementations for each instruction.
macro_rules! op_debug_fmt {
($Op:ident[$ra:ident : RegId]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let ra = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.finish()
}
};
($Op:ident[$ra:ident : RegId $rb:ident : RegId]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, rb) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($rb), &format_args!("{:#02x}", u8::from(rb)))
.finish()
}
};
($Op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, rb, rc) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($rb), &format_args!("{:#02x}", u8::from(rb)))
.field(stringify!($rc), &format_args!("{:#02x}", u8::from(rc)))
.finish()
}
};
(
$Op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId $rd:ident : RegId]
) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, rb, rc, rd) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($rb), &format_args!("{:#02x}", u8::from(rb)))
.field(stringify!($rc), &format_args!("{:#02x}", u8::from(rc)))
.field(stringify!($rd), &format_args!("{:#02x}", u8::from(rd)))
.finish()
}
};
(
$Op:ident[$ra:ident : RegId $rb:ident : RegId $rc:ident : RegId $imm:ident : Imm06]
) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, rb, rc, imm) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($rb), &format_args!("{:#02x}", u8::from(rb)))
.field(stringify!($rc), &format_args!("{:#02x}", u8::from(rc)))
.field(stringify!($imm), &u8::from(imm))
.finish()
}
};
($Op:ident[$ra:ident : RegId $rb:ident : RegId $imm:ident : Imm12]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, rb, imm) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($rb), &format_args!("{:#02x}", u8::from(rb)))
.field(stringify!($imm), &u16::from(imm))
.finish()
}
};
($Op:ident[$ra:ident : RegId $imm:ident : Imm18]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let (ra, imm) = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($ra), &format_args!("{:#02x}", u8::from(ra)))
.field(stringify!($imm), &u32::from(imm))
.finish()
}
};
($Op:ident[$imm:ident : Imm24]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
let imm = self.unpack();
f.debug_struct(stringify!($Op))
.field(stringify!($imm), &u32::from(imm))
.finish()
}
};
($Op:ident[]) => {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
f.debug_struct(stringify!($Op)).finish()
}
};
}
// Recursively declares a unique struct for each opcode.
macro_rules! decl_op_struct {
($doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*] $($rest:tt)*) => {
#[doc = $doc]
#[derive(Clone, Copy, Eq, Hash, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "typescript", wasm_bindgen::prelude::wasm_bindgen)]
pub struct $Op(pub (super) [u8; 3]);
decl_op_struct!($($rest)*);
};
() => {};
}
/// This macro is intentionaly private. See the module-level documentation for a thorough
/// explanation of how this macro works.
macro_rules! impl_instructions {
// Define the `Opcode` enum.
(decl_opcode_enum $($doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*])*) => {
/// Solely the opcode portion of an instruction represented as a single byte.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[repr(u8)]
pub enum Opcode {
$(
#[doc = $doc]
$Op = $ix,
)*
}
};
// Define the `Instruction` enum.
(decl_instruction_enum $($doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*])*) => {
/// Representation of a single instruction for the interpreter.
///
/// The opcode is represented in the tag (variant), or may be retrieved in the form of an
/// `Opcode` byte using the `opcode` method.
///
/// The register and immediate data associated with the instruction is represented within
/// an inner unit type wrapper around the 3 remaining bytes.
#[derive(Clone, Copy, Eq, Hash, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub enum Instruction {
$(
#[doc = $doc]
$Op(op::$Op),
)*
}
};
// Recursively generate a test constructor for each opcode
(impl_opcode_test_construct $doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*] $($rest:tt)*) => {
#[cfg(test)]
impl crate::_op::$Op {
op_test_construct_fn!($($field)*);
}
impl_instructions!(impl_opcode_test_construct $($rest)*);
};
(impl_opcode_test_construct) => {};
// Implement constructors and accessors for register and immediate values.
(impl_op $doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*] $($rest:tt)*) => {
impl $Op {
/// The associated 8-bit Opcode value.
pub const OPCODE: Opcode = Opcode::$Op;
}
op_new!($Op $($fname: $field)*);
op_accessors!($Op $($fname: $field)*);
impl $Op {
op_unpack!($($field)*);
op_reg_ids!($($field)*);
}
op_constructor!($doc $Op $op [$($fname: $field)*]);
impl From<$Op> for [u8; 3] {
fn from($Op(arr): $Op) -> Self {
arr
}
}
impl From<$Op> for [u8; 4] {
fn from($Op([a, b, c]): $Op) -> Self {
[$Op::OPCODE as u8, a, b, c]
}
}
impl From<$Op> for u32 {
fn from(op: $Op) -> Self {
u32::from_be_bytes(op.into())
}
}
impl From<$Op> for Instruction {
fn from(op: $Op) -> Self {
Instruction::$Op(op)
}
}
#[cfg(feature = "typescript")]
impl From<$Op> for typescript::Instruction {
fn from(opcode: $Op) -> Self {
typescript::Instruction::new(opcode.into())
}
}
impl core::fmt::Debug for $Op {
op_debug_fmt!($Op [$($fname: $field)*]);
}
impl_instructions!(impl_op $($rest)*);
};
(impl_op) => {};
// Implement functions for all opcode variants
(impl_opcode $($doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*])*) => {
impl core::convert::TryFrom<u8> for Opcode {
type Error = InvalidOpcode;
fn try_from(u: u8) -> Result<Self, Self::Error> {
match u {
$(
$ix => Ok(Opcode::$Op),
)*
_ => Err(InvalidOpcode),
}
}
}
impl Opcode {
/// Construct the instruction from all possible raw fields, ignoring inapplicable ones.
#[cfg(test)]
pub fn test_construct(self, ra: RegId, rb: RegId, rc: RegId, rd: RegId, imm: u32) -> Instruction {
match self {
$(
Self::$Op => Instruction::$Op(crate::_op::$Op::test_construct(ra, rb, rc, rd, imm)),
)*
}
}
}
};
// Implement accessors for register and immediate values.
(impl_instruction $($doc:literal $ix:literal $Op:ident $op:ident [$($fname:ident: $field:ident)*])*) => {
impl Instruction {
/// This instruction's opcode.
pub fn opcode(&self) -> Opcode {
match self {
$(
Self::$Op(_) => Opcode::$Op,
)*
}
}
/// Unpacks all register IDs into a slice of options.
pub fn reg_ids(&self) -> [Option<RegId>; 4] {
match self {
$(
Self::$Op(op) => op.reg_ids(),
)*
}
}
}
impl From<Instruction> for [u8; 4] {
fn from(inst: Instruction) -> Self {
match inst {
$(
Instruction::$Op(op) => op.into(),
)*
}
}
}
#[cfg(feature = "typescript")]
impl From<Instruction> for typescript::Instruction {
fn from(inst: Instruction) -> Self {
typescript::Instruction::new(inst)
}
}
impl core::convert::TryFrom<[u8; 4]> for Instruction {
type Error = InvalidOpcode;
fn try_from([op, a, b, c]: [u8; 4]) -> Result<Self, Self::Error> {
match Opcode::try_from(op)? {
$(
Opcode::$Op => Ok(Self::$Op(op::$Op([a, b, c]))),
)*
}
}
}
impl core::fmt::Debug for Instruction {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
match self {
$(
Self::$Op(op) => op.fmt(f),
)*
}
}
}
};
// Entrypoint to the macro, generates structs, methods, opcode enum and instruction enum
// separately.
($($tts:tt)*) => {
mod _op {
use super::*;
decl_op_struct!($($tts)*);
impl_instructions!(impl_op $($tts)*);
}
impl_instructions!(decl_opcode_enum $($tts)*);
impl_instructions!(decl_instruction_enum $($tts)*);
impl_instructions!(impl_opcode $($tts)*);
impl_instructions!(impl_instruction $($tts)*);
impl_instructions!(impl_opcode_test_construct $($tts)*);
};
}
/// Defines the enum with `TryFrom` trait implementation.
#[macro_export]
macro_rules! enum_try_from {
(
$(#[$meta:meta])* $vis:vis enum $name:ident {
$($(#[$vmeta:meta])* $vname:ident $(= $val:expr)?,)*
},
$from:ident
) => {
$(#[$meta])*
$vis enum $name {
$($(#[$vmeta])* $vname $(= $val)?,)*
}
impl core::convert::TryFrom<$from> for $name {
type Error = $crate::PanicReason;
fn try_from(v: $from) -> Result<Self, Self::Error> {
match v {
$(x if x == $name::$vname as $from => Ok($name::$vname),)*
_ => Err($crate::PanicReason::InvalidMetadataIdentifier),
}
}
}
}
}