How to implement fastcall ?
( stdcall is calling convention for pass function arguments via registers )

On Monday, 21 September 2020 at 11:14:06 UTC, Виталий Фадеев wrote:
> How to implement fastcall ?
> ( stdcall is calling convention for pass function arguments via registers )

On Monday, 21 September 2020 at 11:14:06 UTC, Виталий Фадеев wrote:
fix...
( fastcall is calling convention for pass function arguments via registers )

On Monday, 21 September 2020 at 11:14:06 UTC, Виталий Фадеев wrote:
> How to implement fastcall ?
> ( stdcall is calling convention for pass function arguments via registers )

The supported linkage attributes are here:

https://dlang.org/spec/attribute.html#linkage

`extern(Windows)` is stdcall, `extern(C)` is cdecl. Unless it's a hidden feature that I'm unaware of, fastcall is not supported.

On Monday, 21 September 2020 at 11:14:06 UTC, Виталий Фадеев wrote:
> How to implement fastcall ?
> ( stdcall is calling convention for pass function arguments via registers )

Hypothesis: it is possible what LLVM + Link Time Optimization does by this way.

On Wednesday, 23 September 2020 at 19:50:13 UTC, Denis Feklushkin wrote:
> On Monday, 21 September 2020 at 11:14:06 UTC, Виталий Фадеев wrote:
>> How to implement fastcall ?
>> ( stdcall is calling convention for pass function arguments via registers )
>
> Hypothesis: it is possible what LLVM + Link Time Optimization does by this way.

~All modern ABIs use registers; __fastcall was one of the special 32-bit x86 ABIs AFAIK (using up to 2 GP registers) and isn't supported directly. The D ABI for 32-bit x86 uses one GP register (and is somewhat similar to __thiscall for member functions).