similar to: [LLVMdev] Math instructions

On Tue, 4 Jan 2005, Morten Ofstad wrote: > I'm currently adding the floating point math instructions (fabs, fsin, fcos > ...) to the x86 instruction set. Cool! > I'm a bit unsure how to make the back end actually generate these > instructions, though. My current plan is to add llvm intrinsics for > these instructions but I've noticed that llvm already handles C

Chris Lattner wrote: > The way to deal with this is to add LLVM intrinsics, but only for > functions that set errno. For example, you could add llvm.sqrt, which > is just undefined on a negative value other than -0.0. For your uses, > you just emit llvm.sqrt, the C frontend will make use of it and wrap > errno handling around it as required. > > For functions like

On Thu, 28 Apr 2005, Morten Ofstad wrote: > I have been gone for a while, finishing work on my Master's thesis... Hi Morten, congrats! :) > Now that I'm back I updated LLVM to the most recent version and found > that my FP_ABS SelectionDAGNode type and code generation was now > conflicting with the new FABS node type. I brought the rest of my local > modifications in

Chris Lattner wrote: > The patches I didn't apply are these: > > 1. Match (Y < 0) ? -Y : Y -> FABS in the SelectionDAGISel.cpp file. We > already catch this at the DAG level. If we aren't, please let me know. OK, no problem - I was just told last time I tried to get my patch in that this was needed because the C++ frontend generated this code, I'm generating

Hello, I have been gone for a while, finishing work on my Master's thesis... Now that I'm back I updated LLVM to the most recent version and found that my FP_ABS SelectionDAGNode type and code generation was now conflicting with the new FABS node type. I brought the rest of my local modifications in line with the FABS implementation, so here is my patch that includes sqrt, sin and cos

HI developers, I want to add trigonometric instructions in my instrinfo.td files how can i directly map these instructions in .td files. Please help me Guys.For Sin, Cos, Tan and Cot Instructions. If I used llvm.sin.* as SDNode Then it is error as llvm variable is not defined SO please Help me. Thanks and Regards Varun -------------- next part -------------- An HTML attachment was scrubbed...

All, in the light of erratum #573 I''m wondering if we need to tweak or conditionally suppress fsincos emulation. The question is whether there is any possibility for getting the emulator to hit this instruction on AMD (as no real mode emulation ought to be taking place there), i.e. whether there are places where emulation gets continued eagerly in anticipation of the need for emulation

Hello everyone, I'd like to propose the attached patch to form FMA intrinsics aggressively, but in order to do so I need some clarification on the intended semantics for the various FP precision-related TargetOptions. I've summarized the three relevant ones below: UnsafeFPMath - Defaults to off, enables "less precise" results than permitted by IEEE754. Comments specifically

On Wed, May 20, 2009 at 4:55 PM, Dan Gohman <gohman at apple.com> wrote: > Can you explain why you chose the approach of using a new pass? > I pictured removing LegalizeDAG's type legalization code would > mostly consist of finding all the places that use TLI.getTypeAction > and just deleting code for handling its Expand and Promote. Are you > anticipating something more

On May 20, 2009, at 1:34 PM, Eli Friedman wrote: > On Wed, May 20, 2009 at 1:19 PM, Eli Friedman > <eli.friedman at gmail.com> wrote: > >> Per subject, this patch adding an additional pass to handle vector >> >> operations; the idea is that this allows removing the code from >> >> LegalizeDAG that handles illegal types, which should be a significant

I've recently tried to get 0.62.3 up on our Suns (4.1.4, using gcc; I'm also having trouble with a Solaris 2.6 compile but I haven't given up hope on that one yet) -- the last compile I did was 0.61.1, which worked smoothly. Running ./configure --prefix=/usr/local/apps/R/R-0.62.3 [--with-g77] (tried both with and without g77, eventually get to the same place), I get a conflict

Per subject, this patch adding an additional pass to handle vector operations; the idea is that this allows removing the code from LegalizeDAG that handles illegal types, which should be a significant simplification. There are still some issues with this patch, but does the approach look sane? -Eli -------------- next part -------------- Index: lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp

Hello, I am trying to make the FP intrinsics (abs, sin, cos, sqrt) I've added work with the X86ISelPattern, but I'm having some difficulties understanding what needs to be done. I assume I have to add new nodetypes for the FP instructions to SelectionDAGNodes.h, and make nodes for these in SelectionDAGLowering::visitCall when I find the intrinsic... The part I don't quite

Hi Owen, Having looked into this due to Clang failing PlumHall with it recently I can give an opinion... I think !NoExcessFPPrecision covers FMA completely. There are indeed some algorithms which give incorrect results when FMA is enabled, examples being those that do floating point comparisons such as: a * b + c - d. If c == d, it is still possible for that result not to equal a*b, as "+c

New patch here -- it's not been tested yet because we're having some problems with the application (I can't create new VM programs at the moment), but it compiles OK ;-) Please look over it and see if there are some more changes you'd like me to make before you can commit it... m. -------------- next part -------------- An embedded and charset-unspecified text was scrubbed...

In trying to compile R-0.62.2 on my SPARC SunOS: tajo% uname -a SunOS tajo 4.1.3_U1 1 sun4m with gcc/g77, I ran into gcc -o R.binary [deleted] ../lib/libmath.a -L/usr/openwin/lib -lX11 -ldl -ltermcap -lm -lf2c collect2: ld returned 2 exit status ld: /lib/libm.a(lgamma.o): _gamma: multiply defined ld: /lib/libm.a(lgamma.o): _lgamma: multiply defined *** Error code 1 make: Fatal error:

Hello, I just finished installing R-0.64.1 on my linux machine (using kernel 2.0.36 under red hat 5.2, and gcc version egcs-2.91.60 19981201 (egcs-1.1.1 release) ) The two problems I had: 1. ./configure --with-readline --with-x --prefix=/usr/local ran to a point, then gave up with ... checking return type of signal handlers... void checking for working const... yes

Hello, I just finished installing R-0.64.1 on my linux machine (using kernel 2.0.36 under red hat 5.2, and gcc version egcs-2.91.60 19981201 (egcs-1.1.1 release) ) The two problems I had: 1. ./configure --with-readline --with-x --prefix=/usr/local ran to a point, then gave up with ... checking return type of signal handlers... void checking for working const... yes

Hello all, I set: InitRoots = true; in my gc plugin as i want the roots to be initialized to the "null" value. Is there a way to define which value should be the initial one? For example, i would like to initialize my roots to -5 (tagged, null value for the GC in my runtime system) instead of 0. Ofcourse, i could do it in the frontend (storing -5 to all GC roots), but i was wondering

On Wed, Sep 26, 2018 at 9:32 AM Sanjay Patel <spatel at rotateright.com> wrote: > > > On Tue, Sep 25, 2018 at 7:47 PM Cameron McInally <cameron.mcinally at nyu.edu> > wrote: > >> >> This is the first time I'm looking at foldShuffledBinop(...), so maybe a >> naive question, but why not do similar shuffle canonicalizations on unary >> (or