Re: Special integer operations

2019-10-28 Thread Ali Çehreli via Digitalmars-d-learn 

On 10/28/2019 03:20 PM, IGotD- wrote:
I'm trying to find if D has any built in special integer operations like 
bit reverse, population count, count leading zeroes, count trailing 
zeroes.

  https://dlang.org/phobos/core_bitop.html

Ali

Special integer operations

2019-10-28 Thread IGotD- via Digitalmars-d-learn 
I'm trying to find if D has any built in special integer 
operations like bit reverse, population count, count leading 
zeroes, count trailing zeroes. Many ISAs have dedicated 
instructions for these kinds of operations. I haven't found any 
of these in the documentation, either implemented as fallback D 
code or working directly on the ISA instructions.


Do these exist or do you have to create these yourselves or 
resort to compiler intrinsics?

Re: Running unittests of a module with -betterC

2019-10-28 Thread Daniel Kozak via Digitalmars-d-learn 
On Mon, Oct 28, 2019 at 9:40 AM Per Nordlöw via Digitalmars-d-learn
 wrote:
>
> Is it possible to run the unittests of a module with -betterC like
>
>  dmd -D -g -main -unittest -betterC f.d
>
> ?
>
> This currently errors as
>
> /usr/include/dmd/druntime/import/core/internal/entrypoint.d:34:
> error: undefined reference to '_d_run_main'
>
> for an empty file f.d

AFAIK no,

https://dlang.org/spec/betterc.html#unittests

Running unittests of a module with -betterC

2019-10-28 Thread Per Nordlöw via Digitalmars-d-learn 

Is it possible to run the unittests of a module with -betterC like

dmd -D -g -main -unittest -betterC f.d

?

This currently errors as

/usr/include/dmd/druntime/import/core/internal/entrypoint.d:34: 
error: undefined reference to '_d_run_main'


for an empty file f.d