f4bd6d74f4
The Mnemonic enum had one member per encoding form -- ADD_IMM, ADD_SR, ADD_ER, ADD_V for what an assembler just calls ADD; LDR, LDR_LIT, LDR_PRE, LDR_POST, LDR_REG, LDR_V for LDR; SVE_ADD_Z / SVE_ADD_PRED / SVE_AND_P for names SVE spells ADD and AND. The encoder never needed that: like x86, it already resolves a mnemonic by scanning its run of forms and matching operand types, so the split bought nothing and cost a printer that had to strip suffixes back off at runtime -- incompletely, so ADD_V printed "add.v", LDR_PRE "ldr.pre" and FCVT_H_S "fcvt.h.s". Collapse the enum to the names assemblers accept: 1104 -> 785 mnemonics, with the variants becoming forms under one name (ADD now has 13, LDR 15). LSLV/LSRV/ASRV/RORV fold into LSL/LSR/ASR/ROR. Form order within a run is precedence, and the original declaration order is already the order an assembler resolves: "add w0,w1,w2" takes the shifted-register form, and only the extended form can encode SP. This needed one structural change. The matcher was blind to addressing mode -- `case .MEM: return op.kind == .MEMORY` -- which is precisely why LDR/LDR_PRE/LDR_POST/LDR_REG had to be separate mnemonics; all 20 merge collisions were this and nothing else. Split Operand_Type.MEM into mode-specific types (MEM_OFFSET/PRE/POST/REG/EXT plus four SVE), matching how W_REG/W_SHIFTED/W_EXTENDED are already distinct types over one register class. The decoder derives Address_Mode from `enc`, so it is unaffected. Encodings are unchanged: the multiset of (ops, enc, bits, mask, feature, flags) over all forms is identical before and after except for two entries deliberately dropped. NOT_V_ALIAS duplicated NOT_V byte for byte, and MOV_V_ALIAS was wrong -- it encoded VN where the ORR-based MOV alias needs VN_VM_DUP, so "mov v1.8b, v2.8b" would have emitted "orr v1.8b, v2.8b, v0.8b". AMX_* keeps its prefix: Apple's coprocessor is undocumented with no assembler spelling, so there is no canonical name to collapse to and bare "set"/"clr"/"ldx" would mislead. The two-token system instructions keep theirs too and print with a space (dc zva, tlbi vae1, bti j). Verified: all 11 rexcode suites match HEAD exactly (arm64 461/461); the three generator stages round-trip idempotently; 754 of 785 mnemonics are accepted by llvm-mc, the rest being AMX (24), TME (4, no +tme in this LLVM build), B_COND/BC_COND and TBL2; and a 39-case encode/print differential against llvm-mc matches 34, with the 5 others confirmed byte-identical at HEAD (pre-existing LSR/ASR immediate and LDP pre-index packing bugs, and printer gaps for vector arrangements and MOVZ/MOVK shifts). Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The Data-Oriented Language for Sane Software Development.
The Odin Programming Language
Odin is a general-purpose programming language with distinct typing, built for high performance, modern systems, and built-in data-oriented data types. The Odin Programming Language, the C alternative for the joy of programming.
Website: https://odin-lang.org/
package main
import "core:fmt"
main :: proc() {
program := "+ + * 😃 - /"
accumulator := 0
for token in program {
switch token {
case '+': accumulator += 1
case '-': accumulator -= 1
case '*': accumulator *= 2
case '/': accumulator /= 2
case '😃': accumulator *= accumulator
case: // Ignore everything else
}
}
fmt.printf("The program \"%s\" calculates the value %d\n",
program, accumulator)
}
Documentation
Getting Started
Instructions for downloading and installing the Odin compiler and libraries.
Nightly Builds
Get the latest nightly builds of Odin.
Learning Odin
Overview of Odin
An overview of the Odin programming language.
Frequently Asked Questions (FAQ)
Answers to common questions about Odin.
Packages
Documentation for all the official packages part of the core and vendor library collections.
Examples
Examples on how to write idiomatic Odin code. Shows how to accomplish specific tasks in Odin, as well as how to use packages from core and vendor.
Odin Documentation
Documentation for the Odin language itself.
Odin Discord
Get live support and talk with other Odin programmers on the Odin Discord.
Articles
The Odin Blog
The official blog of the Odin programming language, featuring announcements, news, and in-depth articles by the Odin team and guests.
Warnings
- The Odin compiler is still in development.