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-//===- README.txt - Notes for improving CellSPU-specific code gen ---------===//
-
-This code was contributed by a team from the Computer Systems Research
-Department in The Aerospace Corporation:
-
-- Scott Michel (head bottle washer and much of the non-floating point
- instructions)
-- Mark Thomas (floating point instructions)
-- Michael AuYeung (intrinsics)
-- Chandler Carruth (LLVM expertise)
-- Nehal Desai (debugging, i32 operations, RoadRunner SPU expertise)
-
-Some minor fixes added by Kalle Raiskila.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR
-OTHERWISE. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE FOR DAMAGES
-OF ANY KIND OR NATURE WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE ARISING
-OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE INCLUDING, WITHOUT
-LIMITATION, DAMAGES RESULTING FROM LOST OR CONTAMINATED DATA, LOST PROFITS OR
-REVENUE, COMPUTER MALFUNCTION, OR FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL,
-OR PUNITIVE DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
-SUCH DAMAGES ARE FORESEEABLE.
-
----------------------------------------------------------------------------
---WARNING--:
---WARNING--: The CellSPU work is work-in-progress and "alpha" quality code.
---WARNING--:
-
-If you are brave enough to try this code or help to hack on it, be sure
-to add 'spu' to configure's --enable-targets option, e.g.:
-
- ./configure <your_configure_flags_here> \
- --enable-targets=x86,x86_64,powerpc,spu
-
----------------------------------------------------------------------------
-
-TODO:
-* Create a machine pass for performing dual-pipeline scheduling specifically
- for CellSPU, and insert branch prediction instructions as needed.
-
-* i32 instructions:
-
- * i32 division (work-in-progress)
-
-* i64 support (see i64operations.c test harness):
-
- * shifts and comparison operators: done
- * sign and zero extension: done
- * addition: done
- * subtraction: needed
- * multiplication: done
-
-* i128 support:
-
- * zero extension, any extension: done
- * sign extension: needed
- * arithmetic operators (add, sub, mul, div): needed
- * logical operations (and, or, shl, srl, sra, xor, nor, nand): needed
-
- * or: done
-
-* f64 support
-
- * Comparison operators:
- SETOEQ unimplemented
- SETOGT unimplemented
- SETOGE unimplemented
- SETOLT unimplemented
- SETOLE unimplemented
- SETONE unimplemented
- SETO done (lowered)
- SETUO done (lowered)
- SETUEQ unimplemented
- SETUGT unimplemented
- SETUGE unimplemented
- SETULT unimplemented
- SETULE unimplemented
- SETUNE unimplemented
-
-* LLVM vector suport
-
- * VSETCC needs to be implemented. It's pretty straightforward to code, but
- needs implementation.
-
-* Intrinsics
-
- * spu.h instrinsics added but not tested. Need to have an operational
- llvm-spu-gcc in order to write a unit test harness.
-
-===-------------------------------------------------------------------------===
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