| //===- 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: done |
| * 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. |
| |
| ===-------------------------------------------------------------------------=== |
