similar to: Assign Name of Data Frame

I'm tryuing to get the RODBC package to work with a MS Sql database (Wonderware's InSQL). I'm able to connect to the database using the following: version _ platform i386-pc-mingw32 arch x86 os Win32 system x86, Win32 status Under development (unstable)

I have a dataframe zeespan. One of the columns has the name "customer". The data in the customer column is text. I would like to return a subset of the dataframe with all rows that DON'T begin with either "ibm" or "exxon", or "sears" in the customer column. I tried .... subset(zeespan, customer != c("ibm" | "exxon" |

Is that even a valid instruction? I thought TEST only took 32-bit immediates. Fiona > On Jan 22, 2015, at 2:48 PM, Chris Sears <chris.sears at gmail.com> wrote: > > The problem is that REX TEST reg,#(1<<37) is 10 bytes vs 5 bytes for REX BT reg,37. > That's a large space penalty to pay for a possible partial update stall. > > So the idea of generating BT for

Yeah, the alternative is to do movabs and then test, which is doable but I’m not sure if it’s worth it (surely BT + risk of flags merging penalty has to be better than two ops, one of which is ~9-10 bytes). Fiona > On Jan 22, 2015, at 2:59 PM, Chris Sears <chris.sears at gmail.com> wrote: > > My bad on that. So that's what the comment meant. > That means BT is pretty much

On Thu Jan 22 2015 at 3:32:53 PM Chris Sears <chris.sears at gmail.com> wrote: > The status quo is: > > a) 40b REX+BT instruction for the 64b case > b) 48b TEST for the 32b case > c) unless it's small TEST > > > You are currently paying a 16b penalty for TEST vs BT in the 32b case. > That may be worth testing the -Os flag. > You'll want -Oz here, Os

​Hi all, I am using llvmlite for pyvex and I want the output of my code (which is written based on llvmlite) to be like pyvex. In pyvex, (https://github.com/angr/pyvex). Considering pyvex, I tried to implement the following statements in pyvex to llvmlite: for stmt in irsb.statements: if isinstance(stmt, pyvex.IRStmt.Store): print "ST%s(%s) = %s" % (self.endness[-2:].lower(),

Hi Chris, If you have everything setup to test, can you generate the LLVM IR with -03 from 3.4.1 and 3.5 to be sure they match. Then we can focus on the backend. Thanks, Mehdi > On Feb 3, 2015, at 1:58 AM, Chris Sears <chris.sears at gmail.com> wrote: > > So between 3.4.1 and 3.5 since it isn't in 3.4.1 and it is in the current XCode. -------------- next part

> On Jan 22, 2015, at 1:22 PM, Fiona Glaser <fglaser at apple.com> wrote: > > According to Agner’s docs, many CPUs have slower BT than TEST; Haswell has only 0.5 inverse throughput as opposed to 0.25, Atom has 1 instead of 0.5, and Silvermont can’t even dual-issue BT (it locks both ALUs). So while BT does seem have a shorter instruction encoding than TEST for TEST reg, imm32 where

tools/firmware: remove "_PS0/3" Method Do not expose the ACPI power management "_PS0/3" Method to guest firmware. According to section 3.4 of the APCI specification 4.0, PCI device control the device power through its own specification but not through APCI. Qemu pushes "_PS0/3" to guest will cause a mess between ACPI PM and PCI PM as a result of incorrect ACPI table

I suspect that this is because the mask in your example is the result of a variable shift, which (a) has it’s own performance and flags hazards pre-SHLX and (b) requires additional µops to do with TEST. I expect that ICC is putting a dummy TEST or XOR ahead of the BT to break the false flags dependency, as well. If the mask were constant, I expect ICC would generate TEST instead (but I don’t

def self.up execute("delimiter ^ ") sql = <<-_SQL CREATE TRIGGER customer_bi BEFORE INSERT ON customers FOR EACH ROW BEGIN SET NEW.sndx = SOUNDEX(NEW.lname) ; END ^ _SQL sql.split(''^'').each do |stmt| execute(stmt) if (stmt.strip! && stmt.length > 0) end execute("delimiter ;

That’s not how partial-flags update stalls work. There is no independent tracking of individual bits in EFLAGS. This means that BT + CMOVNZ has a false dependency on whatever instruction wrote to EFLAGS before BT and requires an extra µop vis-a-vis TEST + CMOVNZ or SHR + AND. Please do not use BT. It is a performance hazard. If you don’t believe me for some reason, here’s the relevant quote

Hey Everyone, I am using NuFone for 866 inbound service and I am trying to figure out the callerid part of it. Any call into my * system just shows "Toll Free Call" and will not give me the calling party's caller ID info. Is this just something I have to live with using NuFOne, or did I miss some type of config in * that will grab the callerID other than the inbound 866 number...?

Hi all- A few weeks ago I noticed that our "omit braces with single line blocks" rule wasn't written down! Additionally, as a group on IRC and in review, noticed that the enforcement of this rule has been extremely inconsistent. We made a first run at codifying our existing practice here: https://reviews.llvm.org/D80947, which was then committed after significant time on

Sure. Attached is the file but here are the functions. The first uses a fixed bit offset. The second has a indexed bit offset. Compiling with llc -O3, LLVM version 3.7.0svn, it compiles the IR from IsBitSetB() using btq %rsi, %rdi. Good. But then it compiles IsBitSetA() with shrq/andq, which is is pretty much what Clang had generated as IR. shrq $25, %rdi andq $1, %rdi LLVM should be able to

Hi, Do you have some code we can look at (even if it is in a nasty unpolished state, just mark it WIP and put it on Phab) ? It is hard to evaluate an alternative without the code. That said I think that the table is a little bit one-sided. I have added some inline comments. On 30/12/2019 11:53, Ehud Katz wrote: > The solution in Clang is still very complicated and error prone. A lot of

Dear All, I have a question How could I use WhileStmt class in Stmt.h http://clang.llvm.org/doxygen/Stmt_8h_source.html to implement while loop like while(i==1){} that is required to be inserted For example, Convert x++; y++; to x++; while(i=1){} y++; from the class's constructor: WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body,SourceLocation WL);//I know C -->

On Mon, Jun 15, 2020 at 4:05 PM Mehdi AMINI via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > As another data point, the MLIR part of the codebase is pretty consistent on this: never use braces for trivial (single statement) if/else/for, but always put it on every branch if needed on any side of the if/else. Any opinion/stance policy/practice on the "one line, or one statement

----- Original Message ----- > From: "Dehao Chen" <dehao at google.com> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: "Xinliang David Li" <davidxl at google.com>, "llvm-dev" > <llvm-dev at lists.llvm.org> > Sent: Tuesday, November 1, 2016 1:24:01 PM > Subject: Re: [llvm-dev] (RFC) Encoding code duplication factor in

All, This buildbot is getting lots of assertion failures in the test suite. They were probably caused by my commit: ------------------------------------------------------------------------ r151049 | foad | 2012-02-21 09:25:52 +0000 (Tue, 21 Feb 2012) | 6 lines Changed paths: M /llvm/trunk/lib/VMCore/LLVMContextImpl.h M /llvm/trunk/lib/VMCore/Type.cpp PR1210: make uniquing of struct and