search for: isfmafasterthanfmulandfadd

...s, and they all return true if the FMA hardware exists. - Arch From: Jingyue Wu [mailto:jingyue at google.com] Sent: Wednesday, December 10, 2014 2:56 PM To: Robison, Arch Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] Best way for JIT to query whether llvm.fma.* is fast? Does TargetLowering::isFMAFasterThanFMulAndFAdd (http://llvm.org/docs/doxygen/html/TargetLowering_8h_source.html#l01499) help? Jingyue On Wed, Dec 10, 2014 at 12:48 PM, Robison, Arch <arch.robison at intel.com<mailto:arch.robison at intel.com>> wrote: For the Julia language JIT, we’d like be able to tell whether the llvm.fma.* intr...

...below. (Basically, the current interface definition is broken and not followed, and no in-tree target was doing the right thing with it, so it is unlikely any out-of-tree target is either...) To un-break your build after this patch goes through, you will need to rename isFMAFasterThanMulAndAdd to isFMAFasterThanFMulAndFAdd and ensure that it returns true for any type that eventually legalizes to a type for which FMAs are faster than FMul + FAdd (which usually means you have hardware support of the operation.). You can look at in-tree target implementations as an example. Please let me know if there are any objection...

For the Julia language JIT, we'd like be able to tell whether the llvm.fma.* intrinsic has hardware support. What's the best way to query LLVM (JIT) for this information? The information would be used in situations where the user wants to use different algorithms depending on whether FMA hardware is present or not. - Arch D. Robison -------------- next part -------------- An HTML

..., > NoInfsFPMath, NoNaNsFPMath, AllowFPOpFusion (Fast, Standard, Strict) > b. SDNodeFlags for UnsafeAlgebra, NoNaNs, NoInfs, NoSignedZeros (but > nothing for FMA since IR FMF has nothing for FMA) > c. SelectionDAGTargetInfo::generateFMAsInMachineCombiner() > d. TargetLoweringBase::isFMAFasterThanFMulAndFAdd() > e. TargetLoweringBase::enableAggressiveFMAFusion() > f. ISD::FMA (no intermediate rounding step) and ISD::FMAD (has > intermediate rounding) nodes > On Thu, Nov 17, 2016 at 6:03 PM, Finkel, Hal J. < hfinkel at anl.gov > > wrote: > > Sent from my Verizon Wireless 4...

Sent from my Verizon Wireless 4G LTE DROID On Nov 17, 2016 5:53 PM, Mehdi Amini <mehdi.amini at apple.com<mailto:mehdi.amini at apple.com>> wrote: > > >> On Nov 17, 2016, at 4:33 PM, Hal Finkel <hfinkel at anl.gov<mailto:hfinkel at anl.gov>> wrote: >> >> >> ________________________________ >>> >>> From: "Warren