On Monday, 19 July 2021 at 17:20:21 UTC, kinke wrote:
You know that asm is to be avoided whenever possible, but unfortunately, AFAIK intel-intrinsics doesn't fit the usual 'don't worry, simply compile all your code with an appropriate -mattr/-mcpu option' recommendation, as it employs runtime detection of available CPU instructions.
intel-intrinsics employs compile-time detection of CPU instructions. If not available, it will work anyway(tm) with alternate slower pathes (and indeed need the right -mattr, so this is the one worry you do get).
So, not using @target("feature") right now, figured it would be helpful for runtime dispatch, but that means literring the code with __traits(targetHasFeature).
