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Global instructions in Vega can either use a VGPR base address plus instruction offset or SGPR base address plus VGPR offset plus instruction offset. Currently the VGPR address/offset is always read as two dwords. This causes problems if the VGPR number is the last VGPR allocated to a wavefront since the second dword would be beyond the allocation and trip an assert. This changeset sets the operand size of the VGPR operand to one dword when SGPR base is used and two dwords otherwise so initDynOperandInfo does not assert. It also moves the read of the VGPR into the calcAddr method so that the correct ConstVecOperandU## is used to prevent another assertion failure when reading from the register file. These two changes are made to all flat instructions, as global instructions are a subsegement of flat instructions. Change-Id: I79030771aa6deec05ffa5853ca2d8b68943ee0a0 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67077 Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@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, 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.