Apple's own headers and tbd files prefer to think of Mac Catalyst as a distinct
OS target. Earlier, when DriverKit support was added to LLVM, it was represented
a distinct OS. So why Apple decided to only represent Mac Catalyst as an ABI in
the target triple is beyond me. But this isn't the first time they've ignored
established target triple norms (see: armv7k and aarch64_32) and it probably
won't be the last.
While doing this, I also audited all Darwin OS prongs throughout the codebase
and made sure they cover all the tags.
There is approximately zero chance of the Zig team ever spending any effort on
supporting Cygwin; the MSVC and MinGW-w64 ABIs are superior in every way that
matters, and not least because they lead to binaries that just run natively on
Windows without needing a POSIX emulation environment installed.
It's easy to do FP unwinding from a CPU context: you just report the
captured ip/pc value first, and then unwind from the captured fp value.
All this really needed was a couple of new functions on the
`std.debug.cpu_context` implementations so that we don't need to rely on
`std.debug.Dwarf` to access the captured registers.
Resolves: #25576
It turns out we did use these in the C backend. However, it's really
just as easy, if not easier, to replicate the logic directly in C.
Synchronizes stage1/zig.h to make sure the bootstrap doesn't depend on
these functions either. The actual zig1 tarball is unmodified because
regenerating it is unnecessary in this instance.
`__addosi4`, `__addodi4`, `__addoti4`, `__subosi4`, `__subodi4`, and
`__suboti4` were all functions which we invented for no apparent reason.
Neither LLVM, nor GCC, nor the Zig compiler use these functions. It
appears the functions were created in a kind of misunderstanding of an
old language proposal; see https://github.com/ziglang/zig/pull/10824.
There is no benefit to these functions existing; if a Zig compiler
backend needs this operation, it is trivial to implement, and *far*
simpler than calling a compiler-rt routine. Therefore, this commit
deletes them. A small amount of that code was used by other parts of
compiler-rt; the logic is trivial so has just been inlined where needed.
I also chose to quickly implement `__addvdi3` (a standard function)
because it is trivial and we already implement the `sub` parallel.
This fixes package fetching on Windows.
Previously, `Async/GroupClosure` allocations were only aligned for the
closure struct type, which resulted in panics when `context_alignment`
(or `result_alignment` for that matter) had a greater alignment.
`Clock.real` being defined to return timestamps relative to an
implementation-specific epoch means that there's currently no way for
the user to translate returned timestamps to actual calendar dates
without digging into implementation details of any particular `Io`
implementation. Redefining it to return timestamps relative to
1970-01-01T00:00:00Z fixes this problem.
There are other ways to solve this, such as adding a new vtable function
for returning the implementation-specific epoch, but in terms of
complexity this redefinition is by far the simplest solution and only
amounts to a simple 96-bit integer addition's worth of overhead on OSes
like Windows that use non-POSIX/Unix epochs.
ML-DSA is a post-quantum signature scheme that was recently
standardized by NIST.
Keys and signatures are pretty large, not making it a drop-in
replacement for classical signature schemes.
But if you are shipping keys that may still be used in 10 years
or whenever large quantum computers able to break ECC arrive,
it that ever happens, and you don't have the ability to replace
these keys, ML-DSA is for you.
Performance is great, verification is faster than Ed25519 / ECDSA.
I tried manual vectorization, but it wasn't worth it, the compiler
does at good job at auto-vectorization already.
This change removes the ref_start_index from the possible enum values of
Index and OptionalIndex. It is not really a index, but a constant that
tells the offset of static Refs, so lets move it where such constant
belongs i.e. to the Ref.
