similar to: [LLVMdev] LLVM floating point rounding modes

Hi, I met troubles with jitting x86 codes when using Intrinsic::x86_sse_ldmxcsr. The target code must execute some SSE2 instruction with DAZ/FTZ modes enabled and others with DAZ/FTZ disabled. I'm trying to get this by emitting LDMXCSR instructions with proper flag words. It appeared however that execution engine sometimes reorders these instructions with computational ones (say with

> This seems like it was done for perf reason (mispredict). Conditional-to-cmov transformation should keep > from introducing additional observable side-effects, and it's clear that whatever did this did not account > for floating point exception. That’s a very reasonable statement, but I’m not sure it corresponds to the way we have typically approached this sort of problem. In

On Tue, 18 Apr 2006 23:27:39 -0700 Evan Cheng <evan.cheng at apple.com> wrote: > Hi Simon, > > The x86 backend does generate scalar SSE2 instructions. For your > example, it should emit something like: Oh, how did you get this ? [...] > > There is nothing here that should cause an exception. Are you using a > release or cvs? CVS. >From what I remember,

On Wed, 19 Apr 2006 19:28:34 +0100 Simon Burton <simon at arrowtheory.com> wrote: > > >From what I remember, this is a bug in debian libc: > some floating point flags are set incorrectly causing SIGFPE. > Can't find the bug report ATM. Oh, it just showed up on numpy-discussion: http://sources.redhat.com/bugzilla/show_bug.cgi?id=10 """ #include

Hi all, During the review of https://reviews.llvm.org/D65997 an issue was revealed, which relates to the decision of how compiler should represents constrained floating point operations. If a floating point operation requires rounding mode or exception behavior different from the default, it should be represented by constrained intrinsic (

Which optimization did you find unsafe? Thanks, --Serge ср, 21 авг. 2019 г. в 05:12, Cameron McInally <cameron.mcinally at nyu.edu>: > On Tue, Aug 20, 2019 at 1:02 PM Serge Pavlov via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> Hi all, >> >> During the review of https://reviews.llvm.org/D65997 >>

Hello everyone, I am co-hosting a BoF at next week's LLVM Dev Meeting to discuss enhancements to floating point support that will enable non-default rounding and FP exception modes. I've just uploaded a set of slides that provides details about the topics I hope to cover. You can find it here (look for the link just below the speaker profiles): http://sched.co/8Yzr I hope the BoF will

I want write article by russian language using Sweave. For cyrillic text LaTeX use T2A encoding \usepackage[T2A]{fontenc} But in Sweave.sty we find: \RequirePackage[T1]{fontenc} It is source of critical problem. For example Rnw file $ cat estimation.Rnw \documentclass[A4paper]{article} \usepackage[T2A]{fontenc} \usepackage[utf8]{inputenc} \usepackage[russian,english]{babel}

Changing the list from cfe-dev to llvm-dev > On 20 Apr 2017, at 4:52 AM, Michael Clark <michaeljclark at mac.com> wrote: > > I’m getting close. I think it may be an issue with an individual intrinsic. I’m looking for the X86 lowering of Instruction::FPToUI. > > I found a comment around the rationale for using a conditional move versus a branch. I believe the predicate logic

I've recently been looking at how to implement in LLVM IR the rounding of floating point values when casting using different rounding modes and I've hit some problems. It seems that when casting down floats to less precise types the ``fptrunc`` LLVM IR instruction is used. The LLVM language reference suggests that it just truncates the value (which would be equivalent to rounding towards

Hi Hal, Thanks for the guidance. I hope you don’t mind that I’m adding LLVMDev to this e-mail thread, as it seems as though it may be of general interest. I agree that duplicating the FP opcodes should be our goal. I just wasn’t sure that was entirely possible. I’ll try adding implicit defs in the way you’ve suggested, but I’m concerned that there may be code that relies on the TII for that

Dear all, I use Sweave to create my reports. my pdf output contains only NA's whenever my text contains special Danish characters like ø, ø and å. I have upgraded R from 2.13 to 2.15 and the scripts worked fine under R 2.13. Sweave("Test.Rnw", encoding = "utf8") texi2dvi("Test.tex", pdf = TRUE) %"Test.Rnw" \documentclass{article} \usepackage

Hi, I have just created a wiki login: DelElson I want to add some contributions to the following pages: HowTos/Laptops/Wireless HowTos/Laptops/NetworkManager HowTos/Laptops/Dell/XPS_M1530 and a not yet existent page: HowTos/Laptops/Toshiba/Tecra_M2 This is based on having done CentOS 5.3 installs on the Dell XPS and Toshiba Tecra laptops mentioned above. -- Del Babel Com Australia

Hi, I have some code which relies on the floating point rounding mode to be set to round-to-negative-infinity. This means that there are some floating point optimizations which are legal with the default round-to- nearest mode but not with rounding to negative infinity. Does LLVM reorder or otherwise optimize floating point operations? I've looked at the options for

Dear expeRts, below are two examples of using texi2dvi. The problem becomes clear from the second example: on cleaning, texi2dvi also deletes the generated .pdf file. Is there a solution? Cheers, Marius ## Example 1: texi2dvi cleans fine, without deleting the generated .pdf require(tools) sink(file="myLaTeXFile1.tex") cat("\\documentclass{article}\n")

I'm trying to run a program called GSAK (Geocaching Swiss Army Knife) under Wine. Most of it runs, however, as part of its normal operation it creates a batch file, BABEL.BAT, to communicate with a GPS using GPSBabel. I've run GPSBabel by itself under wine and it works. I've run the batchfile by hand and *THAT* works (under wcmd). However, I've since discovered that when GSAK

Rd.sty defines \newlength{\middle} which seems to be in conflict with the my latex installation. Here is a minimal example: \documentclass{article} \newlength{\middle} \begin{document} \end{document} It runs fine on a Linux box: carp:136% latex test.tex This is TeX, Version 3.14159 (Web2C 7.3.1) (test.tex LaTeX2e <2000/06/01> Babel <v3.7h> and hyphenation patterns for american,

Hi all, Background I've been working on adding the necessary support to LLVM for clang to be able to support the STDC FENV_ACCESS pragma, which basically allows users to modify rounding mode at runtime and depend on the value of floating-point status flags or to unmask floating point exceptions without unexpected side effects. I've committed an initial patch (r293226) that adds

Hi, We have recently published a paper on floating point accuracy analysis through Monte Carlo Arithmetic. We also released the open-source tool Verificarlo (https://github.com/verificarlo/verificarlo) that relies on LLVM for instrumenting floating point operations. Could you please add our paper to http://llvm.org/pubs/ ? Verificarlo: checking floating point accuracy through Monte Carlo

Dear R list, I'm having some problems with font encodings when using R+Sweave+Latex in my native language: Portuguese. My environment: Kubuntu 5.10 Linux $> uname -a Linux nassa 2.6.12-9-686 #1 Mon Oct 10 13:25:32 BST 2005 i686 GNU/Linux R> R.version _ platform i486-pc-linux-gnu arch i486 os linux-gnu system i486, linux-gnu