similar to: AArch64 fmul/fadd fusion

On Fri, Sep 18, 2015 at 10:34 PM, Tim Northover <t.p.northover at gmail.com> wrote: > AArch64's fmadd instruction is fused, which means it can produce a > different result to the two operations executed separately. The C and > C++ standards do not allow such changes. Sorry, sloppy language on my part. I was aware of fmadd, but I was really asking about turning sequences like:

Hi, I offered some time ago to do some build cleanup. Today I did so and here's my slew of patches. Basically, they - touch ogg, vorbis, vorbis-tools and theora - fix a bunch of autotools issues - uniformize the use of them across the four - fix compile/link flags - use pkgconfig if it's available to detect flags - for vorbis-tools, generate and use config.h - add -uninstalled .pc stuff

Hi, I offered some time ago to do some build cleanup. Today I did so and here's my slew of patches. Basically, they - touch ogg, vorbis, vorbis-tools and theora - fix a bunch of autotools issues - uniformize the use of them across the four - fix compile/link flags - use pkgconfig if it's available to detect flags - for vorbis-tools, generate and use config.h - add -uninstalled .pc stuff

This is just paraphrasing from D26602, so credit to Nicolai for first raising the issue there. float foo(float x, float y) { return x * (y + 1); } $ ./clang -O2 xy1.c -S -o - -target aarch64 -ffp-contract=fast | grep fm fmadd s0, s1, s0, s0 Is this a bug? We transformed the original expression into: x * y + x When x=INF and y=0, the code returns INF if we don't reassociate. With

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

Hi, what is the correct way to specify a C standard in a package's Makevars file? Building a package with e.g. PKG_CFLAGS = -std=gnu11 does work but R CMD check issues a warning: * checking compilation flags in Makevars ... WARNING Non-portable flags in variable 'PKG_CFLAGS': -std=gnu11 (Same for -std=c11.) Thanks! Regards, Andreas Kersting

> The LLVM IR opcodes Add, Sub, and Mul have been each split into > two. Add, Sub, and Mul now only handle integer types, and three > new opcodes, FAdd, FSub, and FMul now handle floating-point types. Dan, Wondering the reason why there is no FDiv ? Thanks, Aaron

On Jun 16, 2009, at 7:34 AM, Aaron Gray wrote: >> The LLVM IR opcodes Add, Sub, and Mul have been each split into >> two. Add, Sub, and Mul now only handle integer types, and three >> new opcodes, FAdd, FSub, and FMul now handle floating-point types. > > Dan, > > Wondering the reason why there is no FDiv ? FDiv already exists; div was split quite a while ago. Dan

----- Original Message ----- From: "Dan Gohman" <gohman at apple.com> To: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu> Sent: Tuesday, June 16, 2009 7:49 AM Subject: Re: [LLVMdev] Upcoming API change: FAdd, FSub, FMul > > On Jun 16, 2009, at 7:34 AM, Aaron Gray wrote: > >>> The LLVM IR opcodes Add, Sub, and Mul have been each split

Hello, The LLVM IR opcodes Add, Sub, and Mul have been each split into two. Add, Sub, and Mul now only handle integer types, and three new opcodes, FAdd, FSub, and FMul now handle floating-point types. The main LLVM APIs are currently preserving backwards compatibility, transparently mapping integer opcodes to corresponding floating-point opcodes when the operands have floating-point types.

On Sep 10, 2016, at 3:33 AM, Steve Canon <scanon at apple.com> wrote: >>> >>> Pretty much. In particular, imagine a user trying to debug an unexpected floating point result caused by conversion of a*b + c into fma(a, b, c). >> >> I think that’s unavoidable, because of the way the optimization levels work. Even fma contraction is on by default (something I’d

----- Original Message ----- > From: "Sanjay Patel" <spatel at rotateright.com> > To: "Hal J. Finkel" <hfinkel at anl.gov> > Cc: "Mehdi Amini" <mehdi.amini at apple.com>, "llvm-dev" > <llvm-dev at lists.llvm.org>, "cfe-dev" <cfe-dev at lists.llvm.org>, > "andrew kaylor" <andrew.kaylor at

Hi, On LLVM 5.0 (current trunk), fadd/fsub and fmul that are both marked with `contract` or `fast` can be merged to a fma instruction by the backend. I'm wondering about the exact semantic of this new flag as well as `fast` and in particular, would it be valid to do this when only the `fadd`/`fsub` (and not the `fmul`) is marked with `contract` or at least `fast`. The reasoning is that doing

Thanks for swift reply > Ahmed Bougacha <ahmed.bougacha at gmail.com> 於 2016年6月28日 下午8:11 寫道： > > On Tue, Jun 28, 2016 at 4:42 AM, Bekket McClane via llvm-dev > <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >> Hi, >> I'm new to LLVM and I'm doing research on factors of compilation time, >> especially instruction

Ping From: Mandeep Singh Grang [mailto:mgrang at codeaurora.org] Sent: Tuesday, February 03, 2015 4:34 PM To: 'llvmdev at cs.uiuc.edu' Cc: 'ghoflehner at apple.com'; 'apazos at codeaurora.org'; mgrang at codeaurora.org Subject: Question on Machine Combiner Pass Hi, In the file lib/CodeGen/MachineCombiner.cpp I see that in the function

On Tue, Jun 28, 2016 at 5:49 AM, Bekket McClane <bekket.mcclane at gmail.com> wrote: > Thanks for swift reply > > Ahmed Bougacha <ahmed.bougacha at gmail.com> 於 2016年6月28日 下午8:11 寫道： > > On Tue, Jun 28, 2016 at 4:42 AM, Bekket McClane via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > Hi, > I'm new to LLVM and I'm doing research on factors

Hi. I have a system storage HP MSA 2012 with 12 drives in it: 8 drives are 2 Tb each and 4 are 1 Tb each. All of them are in array RAID 1+0. This storage is connected to two servers which use data, stored on the storage. So I'm using OCFS2 on these two nodes. Today, after long time of successfull work with it, I've found that it has a limit of 32000 subdirs. The trouble is I have more than

Folks, I've been asking around people about the state of FP contract, which seems to be "on" but it's not really behaving like it, at least not as I would expect: int foo(float a, float b, float c) { return a*b+c; } $ clang -target aarch64-linux-gnu -O2 -S fma.c -ffp-contract=on -o - (...) fmul s0, s0, s1 fadd s0, s0, s2 (...) $ clang -target aarch64-linux-gnu -O2 -S fma.c

Hello, I'm new on this list. First of all, thank you to all the developers of this great project! At the moment there is only an application that keeps me on both macos and windows, its name is PWGL a free environment for computer assisted composition in openGL. (http://www2.siba.fi/PWGL/) I'm running Ubuntu 8.04 and wine 0.9.59. I have to say that I also installed vcrun2005 and

Hi all, I have the issue: icc -std=c99 -std=gnu11 -I../../src/extra -I../../src/extra/xdr -I. -I../../src/include -I../../src/include -I/usr/local/include -I../../src/nmath -DHAVE_CONFIG_H -fopenmp -fpic -g -O3 -wd188 -ip -mp -c eval.c -o eval.o arithmetic.c(66): warning #274: declaration is not visible outside of function int matherr(struct exception *exc) ^