llvm-project

History

George Rokos 2468fdd9af [libomptarget] Add allocator support for target memory This patch adds the infrastructure for allocator support for target memory. Three allocators are introduced for device, host and shared memory. The corresponding API functions have the llvm_ prefix temporarily, until they become part of the OpenMP standard. Differential Revision: https://reviews.llvm.org/D97883		2021-03-13 03:47:07 -08:00
..
cmake/Modules	[OpenMP][NVPTX] Refined CMake logic to choose compute capabilites	2021-01-30 15:14:48 -05:00
deviceRTLs	[OpenMP][DeviceRTL] Extract shuffle idiom and port it to declare variant	2021-03-11 23:31:30 -06:00
include	[libomptarget] Add allocator support for target memory	2021-03-13 03:47:07 -08:00
plugins	[libomptarget] Add allocator support for target memory	2021-03-13 03:47:07 -08:00
src	[libomptarget] Add allocator support for target memory	2021-03-13 03:47:07 -08:00
test	[OpenMP] Restore backwards compatibility for libomptarget	2021-03-11 09:52:11 -05:00
CMakeLists.txt	[OpenMP][Libomptarget] Fix check-libomptarget	2021-01-27 06:46:40 -08:00
README.txt	Unify build documentation and convert to reStructuredText	2017-12-27 09:15:10 +00:00

README.txt

    README for the LLVM* OpenMP* Offloading Runtime Library (libomptarget)
    ======================================================================

How to Build the LLVM* OpenMP* Offloading Runtime Library (libomptarget)
========================================================================
In-tree build:

$ cd where-you-want-to-live
Check out openmp (libomptarget lives under ./libomptarget) into llvm/projects
$ cd where-you-want-to-build
$ mkdir build && cd build
$ cmake path/to/llvm -DCMAKE_C_COMPILER=<C compiler> -DCMAKE_CXX_COMPILER=<C++ compiler>
$ make omptarget

Out-of-tree build:

$ cd where-you-want-to-live
Check out openmp (libomptarget lives under ./libomptarget)
$ cd where-you-want-to-live/openmp/libomptarget
$ mkdir build && cd build
$ cmake path/to/openmp -DCMAKE_C_COMPILER=<C compiler> -DCMAKE_CXX_COMPILER=<C++ compiler>
$ make

For details about building, please look at README.rst in the parent directory.

Architectures Supported
=======================
The current library has been only tested in Linux operating system and the
following host architectures:
* Intel(R) 64 architecture
* IBM(R) Power architecture (big endian)
* IBM(R) Power architecture (little endian)
* ARM(R) AArch64 architecture (little endian)

The currently supported offloading device architectures are:
* Intel(R) 64 architecture (generic 64-bit plugin - mostly for testing purposes)
* IBM(R) Power architecture (big endian) (generic 64-bit plugin - mostly for testing purposes)
* IBM(R) Power architecture (little endian) (generic 64-bit plugin - mostly for testing purposes)
* ARM(R) AArch64 architecture (little endian) (generic 64-bit plugin - mostly for testing purposes)
* CUDA(R) enabled 64-bit NVIDIA(R) GPU architectures

Supported RTL Build Configurations
==================================
Supported Architectures: Intel(R) 64, IBM(R) Power 7 and Power 8

              ---------------------------
              |   gcc      |   clang    |
--------------|------------|------------|
| Linux* OS   |  Yes(1)    |  Yes(2)    |
-----------------------------------------

(1) gcc version 4.8.2 or later is supported.
(2) clang version 3.7 or later is supported.


Front-end Compilers that work with this RTL
===========================================

The following compilers are known to do compatible code generation for
this RTL:
  - clang (from https://github.com/clang-ykt )
  - clang (development branch at http://clang.llvm.org - several features still
    under development)

-----------------------------------------------------------------------

Notices
=======
This library and related compiler support is still under development, so the
employed interface is likely to change in the future.

*Other names and brands may be claimed as the property of others.