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exp_cnt (expInstsIssued in the code) is used in the waitcnt instruction to track that data has been read out of VGPRs in previous global memory instructions, making it safe to overwrite the VGPRs used in said global memory instructions. Previously, exp_cnt wasn't being tracked at all, which lead to the waitcnt finishing immediately, leading to the memory instruction's VPGRs getting overwritten by subsequent instructions, causing errors. This patch makes it so waitcnts waiting on exp_cnt will wait for MUBUF buffer store instructions to read their VGPRs before completing Change-Id: Idd2b59511bc086cf316217da27b7a228272b0b0f Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37555 Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.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, 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.