digitalmars.D.ldc - Conditional compilation to detect AVX2
- Jeff (6/6) May 22 2018 Hello,
- Johan Engelen (13/19) May 22 2018 No, this is a bug in LDC.
- Johan Engelen (2/11) May 22 2018 https://github.com/ldc-developers/ldc/pull/2711
- Jeff (2/16) May 22 2018 Thanks, that was fast !
Hello, Here is a little code exemple where I try to do some conditional compilation (https://dlang.org/spec/version.html) : https://run.dlang.io/is/i8ML91 Is seems 'D_AVX2' is not defined when I pass the '-mattr=+avx2 -O3' options: is there something wrong in my code ?
May 22 2018
On Tuesday, 22 May 2018 at 18:27:20 UTC, Jeff wrote:Hello, Here is a little code exemple where I try to do some conditional compilation (https://dlang.org/spec/version.html) : https://run.dlang.io/is/i8ML91 Is seems 'D_AVX2' is not defined when I pass the '-mattr=+avx2 -O3' options: is there something wrong in my code ?No, this is a bug in LDC. Because LDC doesn't support the core.simd functions (we do support the types), we don't define D_SIMD. But looking at the definition of D_AVX and D_AVX2, we should indeed define them if the compile target supports them. For your purpose, the workaround is: `__traits(targetHasFeature, "avx2")` https://wiki.dlang.org/LDC-specific_language_changes#targetHasFeature (Note: the run.dlang.io machine appears to have a sandybridge CPU, which does not have AVX2; but you can test with AVX (one) instead) -Johan
May 22 2018
On Tuesday, 22 May 2018 at 19:07:47 UTC, Johan Engelen wrote:On Tuesday, 22 May 2018 at 18:27:20 UTC, Jeff wrote:https://github.com/ldc-developers/ldc/pull/2711Hello, Here is a little code exemple where I try to do some conditional compilation (https://dlang.org/spec/version.html) : https://run.dlang.io/is/i8ML91 Is seems 'D_AVX2' is not defined when I pass the '-mattr=+avx2 -O3' options: is there something wrong in my code ?No, this is a bug in LDC.
May 22 2018
Jeff <jromang protonmail.com> On Tuesday, 22 May 2018 at 19:25:06 UTC, Johan Engelen wrote:On Tuesday, 22 May 2018 at 19:07:47 UTC, Johan Engelen wrote:Thanks, that was fast !On Tuesday, 22 May 2018 at 18:27:20 UTC, Jeff wrote:https://github.com/ldc-developers/ldc/pull/2711Hello, Here is a little code exemple where I try to do some conditional compilation (https://dlang.org/spec/version.html) : https://run.dlang.io/is/i8ML91 Is seems 'D_AVX2' is not defined when I pass the '-mattr=+avx2 -O3' options: is there something wrong in my code ?No, this is a bug in LDC.
May 22 2018