similar to: [LLVMdev] How to calculate the address in TableGen?

Hi everyone, I am a newbie to LLVM. I am trying to ban some of instructions in Mips Instruction, for example, lh, lhu, sh, and etc. I have tried to directly comment lh, lhu, and sh to make llvm not to choose these instruction when compiling, however, it usually cause a 'can not select ...' error when using 'short' data type in source code. Then I tried to expand these instructions

why do you want to "ban" certain instructions? is this for some architectural variant? the compiler is trying to match patterns from the target independent part of the code generator. if you remove instructions, the compiler in many cases will no longer be able to match certain patterns and you will get thos "can not select" messages. On 07/20/2012 03:05 AM, Geraint Yang

Thanks for your reply. We are trying to implement a simple Mips-based CPU with just for teaching purpose, so we delete some instructions which are not commonly used, thus the task won't be too hard for students. I am responsible for modifying the compiler so that the compiler won't emit unsupported instructions. In order to avoid "can not select" error, I am trying to expand

YOu have to look for which DAG fragments are not being matched. Then you can create patterns for those using alternate sequences. When you disablea given instruction, don't just disable it, but also look at what pattern it was matching. Then create a patten for that using remaining instructions or in some cases you might have to call a library function, as in the case of floating

this is just on the common path, need to checkout others too, but a start: commit 5501109f6597f2bbed17a264b247c36220362dfb Author: maximilian attems <max at stro.at> Date: Mon Apr 26 08:07:51 2010 +0200 [klibc] ipconfig: Fix valgrind errors valgrind was rightfully complaining on ipconfig eth0: ERROR SUMMARY: 5 errors from 4 contexts (suppressed: 0 from 0) all

This patch fixes a bug on systems with multiple connected network devices. As packet_peek uses all devices to receive data instead of a specific device. As the return value was never reset it was possible that packets from other devices were returned by packet_peek. That means that the ifindex did not match any ifindex of the specified devices the packet was never removed and packets for the

> On Sep 13, 2017, at 9:03 PM, jin chuan see via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hi All, > > Thanks for the reply. I managed to identify and fixed a few errors in my implementation. > > However, there are a few errors that i am not sure what is it indicating. > For starters, i think i should explain what i am trying to achieve. > > I am

Hi, it seems that ipconfig has a problem if multiple devices are up and connected to the same network. It seems that it uses the wrong socket/device index to compare it to incoming packet. To be more precise, the packet gets discarded in do_pkt_recv as the ifindex from state differs always from the incoming packet To reproduce create two tap devices: $ sudo tunctl -u uli -t tap0

The following patches come from Debian and/or Ubuntu packages of klibc. Ben. Ben Hutchings (1): [klibc] run-init: Add dry-run mode Jay Vosburgh (1): [klibc] ipconfig: Use separate sockets for DHCP from multiple interfaces Mathieu Trudel-Lapierre (1): [klibc] ipconfig: Set broadcast when sending DHCPREQUEST and DHCPDISCOVER YunQiang Su (1): [klibc] mips: setjmp.S: don't

me22.ca wrote: > You said that if I have to install GCC, you might as well > just use it for everything. That statement very clearly > doesn't apply anymore, since it's binutils that's the > dependency. Or if you still stand by it, it means that > you consider GCC to also be "incomplete". How do I get the necessary binutils on Windoze? Install MinGW or

Hi, all As I'm a Chinese, be patient of my poor description below. I compiled libgcc into llvm bitcode in both big endian and little endian. and got 2 different version of function: _ashldi3, the following is the fragment of this function: little endian: ============================================= ...... target datalayout =

Hi- I have a solaris 8 box with the latest ssl, ssh, and rsync all set up. ssh and an apache-sll site are running good - I feel confident that ssl and ssh are set up correctly, but when I use rsync over ssh, it (rsync) will allow me to sync as any (system) user from any host ecven though the rsyncd.conf file in /etc has user auth = <one real system user> and host deny = * is there

Running llc with '-verify-machineinstrs' may tell you which instruction break the SSA form. Ruiling From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of jin chuan see via llvm-dev Sent: Monday, September 11, 2017 10:02 AM To: Matthias Braun <mbraun at apple.com> Cc: llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Live Register Spilling Sorry about the

Newbie Q: Building a webstore and need to have SLL-encryption on the checkout pages... I have no previous experience with SSL. I understand that I need a SSL-certificate. I''m planning on purchasing the cert from RapidSSL, but to do that I need to generate a CSR (Certificate Signing Request). How do I do that? How do I install the certificate on the server? Are there any guides on

Dear R-Experts, I have an empirical dataset with 150 subjects for 24 observations. In each observation, each subject can have a score in the range 0:3. I made then a simple index making the sum of the values in each row, so each subject have a score between 0 and 72. I was thinking about what kind of theoretical distribution such an index should have, so I try to make things random like:

Hello. I come back to this older thread. Again, because of i64immSExt32 I receive TableGen error "Could not infer all types in, pattern!" (exact details written below). So far I'm not able to generate selection code with TableGen for the ADD_r* instructions, etc: def i64immSExt32 : PatLeaf<(imm), [{return

Hi LLVM developers, GCC[1] is able to use Loongson ISA[2] for instruction selection: $ cat hello.c #include <stdio.h> int main(int argc, char *argv[]) { printf("Hello World\n"); return 0; } $ gcc -O0 -S hello.c $ cat hello.s .file 1 "hello.c" .section .mdebug.abi64 .previous .nan legacy .gnu_attribute 4, 1 .abicalls

In BPF, an ADD instruction is defined as a 2 register instruction: 0x0f. add dst, src. dst += src In BPFInstrInfo.td this kind of ALU instruction is defined with: def _rr : ALU_RR<BPF_ALU64, Opc, (outs GPR:$dst), (ins GPR:$src2, GPR:$src), "$dst "#OpcodeStr#" $src", [(set

Hi, I'm trying to implement a new backend for an embedded CISC processor. Therefore I thought that it makes sense to take X86 target as a basis, to save some time. But when I look into the X86InstrInfo.td, I have a very strong feeling that it is one of the most complex instruction set descriptions compared to other targets. I can imagine that this is due to the complexity of X86's

I am compiling the following code for the MIPS architecture: unsigned char trunc(float f) { return (unsigned char) f; } and it produces the following assembly (directives removed for convenience: trunc: trunc.w.s $f0, $f12 mfc1 $2, $f0 jr $ra nop However, this does not seem to produce the correct output for negative numbers. When I run the following code, I get