mirror of
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104de4390b
(a) Improve the extract element code: there's no need to do gymnastics with
rotates into the preferred slot if a shuffle will do the same thing.
(b) Rename a couple of SPUISD pseudo-instructions for readability and better
semantic correspondence.
(c) Fix i64 sign/any/zero extension lowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59965 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
2.2 KiB
Plaintext
57 lines
2.2 KiB
Plaintext
//===- README.txt - Notes for improving CellSPU-specific code gen ---------===//
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This code was contributed by a team from the Computer Systems Research
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Department in The Aerospace Corporation:
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- Scott Michel (head bottle washer and much of the non-floating point
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instructions)
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- Mark Thomas (floating point instructions)
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- Michael AuYeung (intrinsics)
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- Chandler Carruth (LLVM expertise)
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- Nehal Desai (debugging, RoadRunner SPU expertise)
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR
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OTHERWISE. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE FOR DAMAGES
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OF ANY KIND OR NATURE WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE ARISING
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OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE INCLUDING, WITHOUT
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LIMITATION, DAMAGES RESULTING FROM LOST OR CONTAMINATED DATA, LOST PROFITS OR
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REVENUE, COMPUTER MALFUNCTION, OR FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL,
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OR PUNITIVE DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
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SUCH DAMAGES ARE FORESEEABLE.
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---------------------------------------------------------------------------
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--WARNING--:
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--WARNING--: The CellSPU work is work-in-progress and "alpha" quality code.
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--WARNING--:
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If you are brave enough to try this code or help to hack on it, be sure
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to add 'spu' to configure's --enable-targets option, e.g.:
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./configure <your_configure_flags_here> \
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--enable-targets=x86,x86_64,powerpc,spu
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---------------------------------------------------------------------------
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The unofficially official status page (because it's not easy to get an
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officially blessed external web page from either IBM Austin or Aerosapce):
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http://sites.google.com/site/llvmcellspu/
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TODO:
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* Finish branch instructions, branch prediction
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These instructions were started, but only insofar as to get llvm-gcc-4.2's
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crtbegin.ll working (which doesn't.)
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* Double floating point support
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This was started. "What's missing?" to be filled in.
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* Intrinsics
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Lots of progress. "What's missing/incomplete?" to be filled in.
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===-------------------------------------------------------------------------===
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