gem5 - gem5

Age	Commit message (Collapse)	Author
2015-10-09	isa: Add parameter to pick different decoder inside ISA	Rekai Gonzalez Alberquilla
	The decoder is responsible for splitting instructions in micro operations (uops). Given that different micro architectures may split operations differently, this patch allows to specify which micro architecture each isa implements, so different cores in the system can split instructions differently, also decoupling uop splitting (microArch) from ISA (Arch). This is done making the decodification calls templates that receive a type 'DecoderFlavour' that maps the name of the operation to the class that implements it. This way there is only one selection point (converting the command line enum to the appropriate DecodeFeatures object). In addition, there is no explicit code replication: template instantiation hides that, and the compiler should be able to resolve a number of things at compile-time.
2013-01-22	x86, cpu: corrects 270c9a75e91f, take over decoder on cpu switch	Nilay Vaish
	The changes made by the changeset 270c9a75e91f do not work well with switching of cpus. The problem is that decoder for the old thread context holds state that is not taken over by the new decoder. This patch adds a takeOverFrom() function to Decoder class in each ISA. Except for x86, functions in other ISAs are blank. For x86, the function copies state from the old decoder to the new decoder.
2013-01-04	Decoder: Remove the thread context get/set from the decoder.	Gabe Black
	This interface is no longer used, and getting rid of it simplifies the decoders and code that sets up the decoders. The thread context had been used to read architectural state which was used to contextualize the instruction memory as it came in. That was changed so that the state is now sent to the decoders to keep locally if/when it changes. That's significantly more efficient. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2012-05-26	ISA,CPU: Generalize and split out the components of the decode cache.	Gabe Black
	This will allow it to be specialized by the ISAs. The existing caching scheme is provided by the BasicDecodeCache in the GenericISA namespace and is built from the generalized components. --HG-- rename : src/cpu/decode_cache.cc => src/arch/generic/decode_cache.cc
2012-05-26	CPU: Merge the predecoder and decoder.	Gabe Black
	These classes are always used together, and merging them will give the ISAs more flexibility in how they cache things and manage the process. --HG-- rename : src/arch/x86/predecoder_tables.cc => src/arch/x86/decoder_tables.cc
2012-05-25	ISA: Make the decode function part of the ISA's decoder.	Gabe Black

2012-05-25	Decode: Make the Decoder class defined per ISA.	Gabe Black
	--HG-- rename : src/cpu/decode.cc => src/arch/generic/decoder.cc rename : src/cpu/decode.hh => src/arch/generic/decoder.hh