Do you think if statement as expression would be nice to have in D?

[Guillaume Piolat]

On Tuesday, 7 June 2022 at 18:28:29 UTC, Walter Bright wrote:
> I thought I fixed the SIMD issues you were having? What is left 
> undone?

I checked and my issues have been fixed indeed, thanks for that.
Because it's an ongoing process, I'll come back later with a new 
set of Issues.

The current status:

- The usage of D_SIMD and core.simd is not yet enabled in 
intel-intrinsics with DMD because it disrupts Core and PR, so 
until now I've been doing it in several attempts to test the 
water and not distract too much people. But it will enabled be 
next time probably, probably in August.

- Once core.simd is enabled for good, D_SIMD usage can be ramped 
up intel-intrinsics (currently, it is only SSE 1 instructions 
that use the D_SIMD _builtins_).
   I expect doing it for all other SIMD instructions will take a 
few months of spare work, and will expose about 4-5 new bugs and 
that will be it. If DMD test suite follows it should be hopefully 
set in stone. wishful.gif

   Until now, most of the issues came from regular vector types 
usage, not really D_SIMD builtins so I expect that last part to 
be less contentious.

I'm curious how close we can get to optimized LDC codegen with 
DMD codegen in an entirely SIMD codebase, it will be somewhere 
between 0.5x and 1.0x. In small godbolt examples it can get 
pretty close.