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This function causes problems with gcc 5 which incorrectly complains about the call to warn_if inside a constexpr function. That should only be an error if a call to a non-constexpr is unavoidable, and even then the compiler isn't required to emit a diagnostic. Rather than drop the warning, or add ifdefs to deal with these defective versions of gcc, this change eliminates the power() function entirely. Most inputs to this function would overflow anyway, which is reportedly why no integer version of an exponentiation function is defined in the standard library, and all uses of this function can easily and more efficiently be replaced by simple left and right shifts. Finally, by eliminating the power() function, we also remove the dependence on base/logging.hh. Change-Id: I4d014163883d12db46da4ee752696c8225534ee8 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42504 Reviewed-by: Gabe Black <gabe.black@gmail.com> Maintainer: Gabe Black <gabe.black@gmail.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.