[LLVMdev] Other Intrinsics?
delta17 at cox.net
Tue Nov 27 09:50:03 PST 2007
> > Do you have plans to add other intrinsics? I'm curious as to why there
> > is an llvm.sin intrinsic and an llvm.cos intrinsic, but no llvm.atan
> > intrinsic. Why is there an llvm.pow intrinsic but no llvm.log
> > intrinsic?
> Intrinsics get added on demand. Generally there has to be a good reason
> to add them. llvm.sin was implemented (for example) to allow generation
> of code that uses vector sin operations.
What is the criteria for adding an intrinsic or a built-in operation?
For example, could the 'frem' instruction be an intrinsic? Could you
remove it from LLVM entirely and make it an external function? What
distinguishes 'frem' from 'sin', 'pow', 'atan2', etc.?
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