similar to: Out-of-line atomics implementation ways

Current precent in the codebase is the __sync_* libcalls. They have essentially the semantics you want, except that they're all seq_cst. On the LLVM side, I'd rather not have two ways to do the same thing, so I'd prefer to extend the existing mechanism. Adding 100 lines to RuntimeLibcalls.def seems a bit unfortunate, but I think you can reduce that using some C macros. On the

LLVM appears to support Library functions for ISD::SRA ,ISD::SHL, and ISD::SRL, as they are properly defined in RuntimeLibCalls.def. The library functions defined in RuntimeLibCalls.def (among others) are these: HANDLE_LIBCALL(SRA_I16, "__ashrhi3") HANDLE_LIBCALL(SRA_I32, "__ashrsi3") HANDLE_LIBCALL(SRA_I64, "__ashrdi3") However, setting

Hi Eli, Thanks for pointing to the CTLZ_ZERO_UNDEF “LibCall” implementation. I have not it in the version that I am currently using, so it’s nice to know that it’s implemented now. Incidentally, the CTLZ… implementation is IDENTICAL to what I am proposing for the Shifts. This is not just adding support for “out-of-tree-targets”, but giving consistency to the fact that we have perfectly defined

Hi Eli, First of all, please I would appreciate that you try to not confuse my limited use of English with stupidity or lack or criteria in other subjects. I’m not English native, so please keep that in mind. You have been significantly helpful in the recent past so please keep on. Interestingly, you made a mention of a related but not identical issue. It is true that most (or all) processors

Hello LLVM-Dev, Most of the processing for i64 and f64 types for our backend are emulation library calls. Some of the library calls are not defined in the RuntimeLibcalls.def Libcall enum so we have to define custom library calls. How is the ideal way of implementing the custom library calls? Providing us with a target backend having a similar functionality would also help us significantly. Say

Hi, Working on private backend, based on llvm-3.7 Inside lib/Transforms/InstCombine/InstCombineCompares.cpp there is attempt to optimize fabs: if (F->getIntrinsicID() == Intrinsic::fabs || ... switch (I.getPredicate()) { ... case FCmpInst::FCMP_OGT: return new FCmpInst(FCmpInst::FCMP_ONE, CI->getArgOperand(0), RHSC); But CI->getArgOperand(0)

On 2/16/2016 8:44 AM, Konstantin Vladimirov via llvm-dev wrote: > > CI->getArgOperand(0) returns operand with type (double*) rather then > double, because in our ABI doubles are passed via memory. The LLVM intrinsics in the LLVM IR must conform to whatever the IR's requirements are. That means that even in the case of your backend, the arguments to the intrinsic must be doubles,

Trying to sum-up the approaches that have been discussed, numbered in the order I saw them: 1) Mangle internal names to avoid collisions. 2) Only optimize library functions when they have external linkage. 3) Switch optimizations to do cloning rather than mutating functions 4) Mark all library functions declared in system headers with some attribute and key optimizations on this #1

Is the llvm backend (legalize, isel, etc.) currently capable of handling type f128? I am trying to emit a call to __subtf3 when I compile the following bitcode: define fp128 @f1(fp128 %a0, fp128 %a1) nounwind readnone { entry: %sub = fsub fp128 %a0, %a1 ret fp128 %sub } This is for the Mips backend.

Thx for the feedback David. So we're heading toward a broader > __attribute__((disable_call_synthesis)) David what do you think about the additional version that restrict the effect to a few named functions? > e.g. __attribute__((disable_call_synthesis("memset", "memcpy", "sqrt"))) A warning should be issued if the arguments are not part of

*TL;DR:* Defining memory functions in C / C++ results in a chicken and egg problem. Clang can mutate the code into semantically equivalent calls to libc. None of `-fno-builtin-memcpy`, `-ffreestanding` nor `-nostdlib` provide a satisfactory answer to the problem. *Goal* Create libc's memory functions (aka `memcpy`, `memset`, `memcmp`, ...) in C++ to benefit from compiler's knowledge and

Greetings list, It's been a while since I've been able to focus on asterisk packaging but this weekend I took some time to audit and recompile packages for CentOS 4.2. You can find them here. ftp://ftp.linuxsys.com/ftp/pub/releases/CentOS-4.0 You have your choice of 1.2.1 or 1.0.10 releases. If you need zaptel modules then install this kernel as well:

Available in the usual place. ftp://ftp.linuxsys.com/pub/releases/CentOS-4.0 This release includes minor spec changes, spandsp 0.0.2pre23, a new Sangoma wanpipe RPM for use with the LSE kernel rpm and an AMP installation document. Best Regards, -- Andrew McRory - President/CTO Linux Systems Engineers, Inc. - http://www.linuxsys.com Located in beautiful Tallahassee, Florida Office

Hi there, I would like to ask something about how to avoid a possible error message within a for loop. I am running a simulation and in some repetitions there may be an error that will cause a crash and stop the whole procedure, what I want is to simply move on to the next iteration automatically and discard the "bad" repetitions from my results. I used the "try" function to

Hi All, I am a newbie and trying to install Asterisk from instructions given in http://www.voip-info.org/tiki-index.php?page=Asterisk+RPM. We have Centos 3.3 so I downloaded rpm's from ftp://ftp.linuxsys.com/pub/LSE/packages/CentOS-3.4/asterisk-1.0.9/ and tried installing one by one but I get the following errors error: Failed dependencies: asterisk = v1.0.9 is needed by

Dear all i?m working with a program i?ve made in R (using functions that others created) to run my program i need a sample. if i generate the sample using for example, rnorm(n, mu, sigma) i have no problem but if i obtain a sample from a column in excel and i copy it, the program says that there is a mistake: it says "Error en `[.data.frame`(data, indices) : undefined columns

Hi All, I wrote a very crude and simple AsmParser for my backend. llvm-tablegen also generates asm-matcher .inc file without any error. I have included the .inc file in my class for AsmParser. However, while building llvm, in linking stage for LTO, i am getting error - undefined reference to functions - ComputeAvailableFeatures, MatchInstructionImpl, MatchRegisterName and

It may not be a full solution for the problems you're trying to solve, but I don't know why adding to include/llvm/CodeGen/RuntimeLibcalls.def is a problem in itself. Certainly, it's a mess that could be organized, especially so we're not repeating everything for each data type as we do right now. So yes, I think that would allow us to remove the VecLib mappings because we are

Dear Samba users and developers, we had the idea of storing S/MIME certificates in the Samba 4 LDAP. In the Windows Active Directory Users and Computers tool I can use the "Published Certificates" tab to add a certificate to a user account. As Mozilla Thunderbird requests the "userCertificate;binary" attribute of a user when sending encrypted mail, the LDAP response is empty.

Dear All, I have a numerical problem: R, as other statistical software, can tell the difference between very small numbers and 0, while apparently cannot distinguish a number close to 1 and 1. In the example below, is it possible to instruct R to recognize that q is different from 1? > p=.00000000000000000000000000000001 > p==0 [1] FALSE > q=.99999999999999999999999999999 >