Re: [Tinycc-devel] [PATCH] stdatomic: ld/st/xchg/cmpxchg on simple types

[Michael Matz]

Hello,

On Mon, 22 Mar 2021, Dmitry Selyutin wrote:

> > Dispatching to per-type functions (instead of per-size ones) is mere busy
> work
> Having a function per each supported size plus one for emulated locking is
> still safer than having a pair, where one deals with opaque data type.
>
> > all that code is generated and implementation specific, not user
> visible
> It is visible.
> https://llvm.org/docs/Atomics.html ("libcalls" section)
> https://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary ("The library interface"
> section)

Yes, sure, that's the GCC (with LLVM following) implementation of runtime 
library.  There is value in providing those as well, from TCCs side, I 
agree.

But there's also value in not implementing facilities twice.

Are your stdatomic patches all on mob meanwhile?


Ciao,
Michael.