The GNU project has released GCC 5.1, which is a major update including a preliminary version of OpenACC and OpenMP 4.0 capability. The source code can be downloaded and built from the mirror sites or the SVN server.
Don’t expect much in terms of OpenACC performance as the execution model currently only allows for one gang, one worker, and a number of vectors. OpenMP 4 looks interesting and includes offload capabilities.
New Languages and Language specific improvements
- OpenMP 4.0 specification offloading features are now supported by the C, C++, and Fortran compilers. Generic changes:
- Infrastructure (suitable for any vendor).
- Testsuite which covers offloading from the OpenMP 4.0 Examples document.
Specific for upcoming Intel Xeon Phi products:
- Run-time library.
- Card emulator.
- GCC 5 includes a preliminary implementation of the OpenACC 2.0a specification. See the OpenACC wiki page for more information.
It’s actually quite easy to build gcc from source. Give it a try!
Note!
- Rebuild all your C++ source code per RedHat.
- New ISA extensions support AVX-512{BW,DQ,VL,IFMA,VBMI} of Intel’s CPU codenamed Skylake Server was added to GCC including inline assembly support, new intrinsics, and basic autovectorization. These new AVX-512 extensions are available via the following GCC switches: AVX-512 Vector Length EVEX feature:
-mavx512vl, AVX-512 Byte and Word instructions:-mavx512bw, AVX-512 Dword and Qword instructions:-mavx512dq, AVX-512 FMA-52 instructions:-mavx512ifmaand for AVX-512 Vector Bit Manipulation Instructions:-mavx512vbmi.
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