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...9;d like to hear from Andrew how this compares with your approach -- I understand you have some other method in mind to handle this for x86? Bye, Ulrich -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180412/98628be4/attachment.html>

Hi Andrew, sorry for the delay, I only now got some time to look into this a bit more. But I still have a number of questions of how to actually implement this in the back end. Looking at this bottom-up, starting with the behavior of the actual machine instructions, we have (at least on SystemZ) the following things to consider: A) Rounding mode Most FP arithmetic instructions use the