search for: subword

Hi, I have a question about implementing subword register allocation problems (see the REFERENCES in the end of this message) on LLVM. I have algorithms, but don't know the best way to implement them in LLVM. I asked similar question before: http://lists.cs.uiuc.edu/pipermail/llvmdev/2005- May/004001.html Because I still don't have a...

Hi All, Some targets don't provide subword (e.g., i8 and i16 for a 32-bit machine) load and store instructions, so currently we have to custom-lower Load- and StoreSDNodes in our backends. For examples, see LowerLOAD() and LowerSTORE() in {XCore,CellSPU}ISelLowering.cpp. I believe it's possible to support this lowering in a target...

On 16 Jul 2011, at 03:34, Matt Johnson wrote: > Hi All, > Some targets don't provide subword (e.g., i8 and i16 for a 32-bit > machine) load and store instructions, so currently we have to > custom-lower Load- and StoreSDNodes in our backends. For examples, see > LowerLOAD() and LowerSTORE() in {XCore,CellSPU}ISelLowering.cpp. I > believe it's possible to support this...

I'm targeting a machine that can only load and store aligned 64-bit words, but I'd like to be able to pack 8-, 16-, and 32-bit values into these words. Loads will require various shifts and masks; stores are more complicated. Does LLVM provide any support for such things? Is there an example target I can look at for ideas? Thanks, Preston -------------- next part -------------- An HTML

...utions have a FLAC package, use the package manager to get FLAC. If not, try <a href="http://rpmfind.net/linux/rpm2html/search.php?query=flac">rpmfind.net</a> or <a href="http://packages.debian.org/cgi-bin/search_packages.pl?keywords=flac&amp;searchon=names&amp;subword=1&amp;version=all&amp;release=all">Debian's packages</a></li> <li><b>Windows</b>: <a href="http://sourceforge.net/project/showfiles.php?group_id=13478&amp;package_id=12675">FLAC for Windows (command-line tools only)</a>...

Chris Lattner wrote: > None, that documentation is out of date and doesn't make a ton of sense > for your application. I would suggest that you implement it in the > context of the SelectionDAG framework that all of the code generators > either currently use or are moving to. I updated the documentation > here:

Actually the problems that Tzu-Chien Chiu are encountering are similar to what should be done for generating SSE code in the X86 backend and also other SIMD instruction sets. I think LLVM neeeds to add instructions for permuting components, extracting and injecting elements in packed types. If the architecture has instructions which can do permutations for each instruction (for example

Each register is a 4-component (namely, r, g, b, a) vector register. They are actually defined as llvm packed [4xfloat]. The instruction: add_sat r0.a, r1_bias.xxyy, r3_x2.zzzz Explaination: '.a' is a writemask. only the specified component will be update '.xxyy' and '.zzzz' are swizzle masks, specify the component permutation, simliar to the Intel SSE permutation

...utions have a FLAC package, use the package manager to get FLAC. If not, try <a href="http://rpmfind.net/linux/rpm2html/search.php?query=flac">rpmfind.net</a> or <a href="http://packages.debian.org/cgi-bin/search_packages.pl?keywords=flac&amp;searchon=names&amp;subword=1&amp;version=all&amp;release=all">Debian's packages</a></li> - <li><b>Windows</b>: <a href="http://sourceforge.net/project/showfiles.php?group_id=13478&amp;package_id=12675">FLAC for Windows (command-line tools only)</a>...

...utions have a FLAC package, use the package manager to get FLAC. If not, try <a href="http://rpmfind.net/linux/rpm2html/search.php?query=flac">rpmfind.net</a> or <a href="http://packages.debian.org/cgi-bin/search_packages.pl?keywords=flac&amp;searchon=names&amp;subword=1&amp;version=all&amp;release=all">Debian's packages</a></li> - <li><b>Windows</b>: <a href="http://sourceforge.net/project/showfiles.php?group_id=13478&amp;package_id=12675">FLAC for Windows (command-line tools only)</a>...