gem5 - gem5

Age	Commit message (Collapse)	Author
2015-04-20	cpu: Remove the InOrderCPU from the tree	Andreas Hansson
	This patch takes the final step in removing the InOrderCPU from the tree. Rest in peace. The MinorCPU is now used to model an in-order microarchitecture, and long term the MinorCPU will eventually be renamed InOrderCPU.
2012-08-28	Clock: Add a Cycles wrapper class and use where applicable	Andreas Hansson
	This patch addresses the comments and feedback on the preceding patch that reworks the clocks and now more clearly shows where cycles (relative cycle counts) are used to express time. Instead of bumping the existing patch I chose to make this a separate patch, merely to try and focus the discussion around a smaller set of changes. The two patches will be pushed together though. This changes done as part of this patch are mostly following directly from the introduction of the wrapper class, and change enough code to make things compile and run again. There are definitely more places where int/uint/Tick is still used to represent cycles, and it will take some time to chase them all down. Similarly, a lot of parameters should be changed from Param.Tick and Param.Unsigned to Param.Cycles. In addition, the use of curTick is questionable as there should not be an absolute cycle. Potential solutions can be built on top of this patch. There is a similar situation in the o3 CPU where lastRunningCycle is currently counting in Cycles, and is still an absolute time. More discussion to be had in other words. An additional change that would be appropriate in the future is to perform a similar wrapping of Tick and probably also introduce a Ticks class along with suitable operators for all these classes.
2011-06-19	inorder: handle serializing instructions	Korey Sewell
	including IPR accesses and store-conditionals. These class of instructions will not execute correctly in a superscalar machine
2011-06-19	inorder: make marking of dest. regs an explicit request	Korey Sewell
	formerly, this was implicit when you accessed the execution unit or the use-def unit but it's better that this just be something that a user can specify.
2011-06-19	inorder: register file stats	Korey Sewell
	keep stats for int/float reg file usage instead of aggregating across reg file types
2011-06-19	inorder: add types for dependency checks	Korey Sewell

2011-06-19	inorder: use flattenIdx for reg indexing	Korey Sewell
	- also use "threadId()" instead of readTid() everywhere - this will help support more complex ISA indexing
2011-04-15	includes: sort all includes	Nathan Binkert

2011-02-18	inorder: remove request map, use request vector	Korey Sewell
	take away all instances of reqMap in the code and make all references use the built-in request vectors inside of each resource. The request map was dynamically allocating a request per instruction. The request vector just allocates N number of requests during instantiation and then the surrounding code is fixed up to reuse those N requests *** setRequest() and clearRequest() are the new accessors needed to define a new request in a resource
2011-02-18	inorder: initialize res. req. vectors based on resource bandwidth	Korey Sewell
	first change in an optimization that will stop InOrder from allocating new memory for every instruction's request to a resource. This gets expensive since every instruction needs to access ~10 requests before graduation. Instead, the plan is to allocate just enough resource request objects to satisfy each resource's bandwidth (e.g. the execution unit would need to allocate 3 resource request objects for a 1-issue pipeline since on any given cycle it could have 2 read requests and 1 write request) and then let the instructions contend and reuse those allocated requests. The end result is a smaller memory footprint for the InOrder model and increased simulation performance
2010-06-24	inorder: cleanup virtual functions	Korey Sewell
	remove the annotation 'virtual' from function declaration that isnt being derived from
2010-06-24	inorder: enforce 78-character rule	Korey Sewell

2010-06-23	inorder-stats: add instruction type stats	Korey Sewell
	also, remove inst-req stats as default.good for debugging but in terms of pure processor stats they aren't useful
2010-01-31	inorder: ctxt switch stats	Korey Sewell
	- m5 line enforcement on use_def.cc,hh
2009-05-26	types: add a type for thread IDs and try to use it everywhere	Nathan Binkert

2009-05-12	inorder-float: Fix storage of FP results	Korey Sewell
	inorder was incorrectly storing FP values and confusing the integer/fp storage view of floating point operations. A big issue was knowing trying to infer when were doing single or double precision access because this lets you know the size of value to store (32-64 bits). This isnt exactly straightforward since alpha uses all 64-bit regs while mips/sparc uses a dual-reg view. by getting this value from the actual floating point register file, the model can figure out what it needs to store
2009-02-10	InOrder: Import new inorder CPU model from MIPS.	Korey Sewell
	This model currently only works in MIPS_SE mode, so it will take some effort to clean it up and make it generally useful. Hopefully people are willing to help make that happen!