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There were three different StaticInst flags for memory barriers, IsMemBarrier, IsReadBarrier, and IsWriteBarrier. IsReadBarrier was never used, and IsMemBarrier was for both loads and stores, so a composite of IsReadBarrier and IsWriteBarrier. This change gets rid of IsMemBarrier and replaces by setting IsReadBarrier and IsWriteBarrier at the same time. An isMemBarrier accessor is left, but is now implemented by checking if both of the other flags are set, and renamed to isFullMemBarrier to make it clear that it's checking both for both types of barrier, not one or the other. Change-Id: I702633a047f4777be4b180b42d62438ca69f52ea Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33743 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/documentation/general_docs/building for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.