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Brendan Punsky e4a7f6146d rexcode/arm64: XAR's reserved encoding is not an instruction
A tsz of zero has no set bit, so it names no element size at all; the
architecture reserves it and llvm-mc calls the word invalid. We decoded
it as `xar z0.b, z0.b, z0.b, #16` -- a shift of 16 on a byte, which is
not a thing.

No single mask says "tsz is not zero", but four do, the same way the
cset aliases exclude AL and NV: 1xxx, 01xx, 001x, 0001 cover every
non-zero value between them and nothing else.

Splitting it that way broke encode at first, because the four forms have
the same operand types and the matcher took whichever came first, ORing
its fixed tsz bit onto a value meant for a different element size. Each
pattern pins exactly the bit its own element size sets, though, so
typing the operands by size makes the matcher pick the right one and the
OR consistent.

SVE/SME2 against llvm-mc: 707 of 707 byte-exact, nothing mismatched and
nothing it cannot assemble.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018UmHLRF11EoWwNWCJ7JGaA
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Odin logo
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.
Languages
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C 4.6%
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Other 0.2%