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Make it possible to read any type of reg, assuming it fits in a RegVal. This avoids assuming building in a dependency on the readIntReg accessor. It also avoids setting up a situation where the API could at least theoretically base the timing expression on the value of *any* int reg, even ones the instruction does not interact with. The ...ReadIntReg expression was only ever used with the result of the ...SrcReg expression, and in my opinion, that's realy the only way it makes sense to use it. It doesn't seem useful to split that operation into two parts. If it actually does make sense (although I doubt this), these operations can't really be generalized easily since the TimingExpr... classes all expect to pass around uint64_ts, and a RegId, the *real* value of a SrcReg index which does not assume a register type, would not fit in that in the general case. Change-Id: I253a0a058dc078deeb28ef0babead4c8ffc3b792 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49776 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Gabe Black <gabe.black@gmail.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, 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 these tools. Once you have all dependencies resolved, type 'scons build/<CONFIG>/gem5.opt' where CONFIG is one of the options in build_opts like ARM, NULL, MIPS, POWER, SPARC, X86, Garnet_standalone, etc. This will build an optimized version of the gem5 binary (gem5.opt) with the the specified configuration. See http://www.gem5.org/documentation/general_docs/building for more details and options. The main source tree includes these subdirectories: - build_opts: pre-made default configurations for gem5 - build_tools: tools used internally by gem5's build process. - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - include: include files for use in other programs - site_scons: modular components of the build system - 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 may need compiled system firmware, kernel binaries and one or more disk images, depending on gem5's configuration and what type of workload you're trying to run. Many of those resources can be downloaded from http://resources.gem5.org, and/or from the git repository here: https://gem5.googlesource.com/public/gem5-resources/ If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.