72 Commits

Author	SHA1	Message	Date
Ross Thompson	80aa0888f3	Updated headers to local branch history predictors.	2023-05-24 12:52:42 -05:00
Ross Thompson	69a9bf7055	Adds local history predictor. ... Fixes performance counters, but not coremark.	2023-05-23 18:53:46 -05:00
Ross Thompson	3a98fb8680	Baseline localhistory with speculative repair built.	2023-05-05 15:23:45 -05:00
Ross Thompson	ee1e380fad	Almost working ahead pipelined local history predictor.	2023-05-04 16:17:31 -05:00
Ross Thompson	8235042ba2	Maybe I finally have the ahead pipelined local history predictor working.	2023-05-04 14:11:34 -05:00
Ross Thompson	060d40853a	Ahead pipelining is not yet working. :(	2023-05-03 17:41:38 -05:00
Ross Thompson	8b0791b6b5	I think ahead pipelining is working for local history.	2023-05-03 12:52:32 -05:00
Ross Thompson	414c79b923	Updated configs for local branch history `defines.	2023-05-02 11:11:04 -05:00
Ross Thompson	0904a9b97f	Swapped the m and k parameters for local history predictor.	2023-05-02 10:52:41 -05:00
Ross Thompson	5777b90407	Might actually have a correct implementation of local history branch prediction.	2023-04-24 13:05:28 -05:00
Ross Thompson	e81445be5d	Fixed the local branch predictor so that it at least compiles.	2023-04-24 11:06:53 -05:00
Limnanthes Serafini	b3976daccd	More cleanup	2023-04-13 21:34:50 -07:00
Ross Thompson	46b1bca4fc	Fixed all tap/space issue in RTL.	2023-03-24 17:32:25 -05:00
Ross Thompson	ada099c58b	Changes BTA to BPBTA.	2023-03-12 14:36:46 -05:00
Ross Thompson	0cb5369351	Renamed BTB misprediction to BTA.	2023-03-03 00:18:34 -06:00
Ross Thompson	b98e007a53	Cleaned up branch predictor performance counters.	2023-03-01 17:05:42 -06:00
Ross Thompson	90b2f0a652	Set bp to use instruction class prediction by default.	2023-03-01 11:52:42 -06:00
Ross Thompson	dea6b643a6	Branch predictor cleanup. ... I think Ch 10 is now done except for BTB performance analysis and the section on running benchmarks and collecting data.	2023-03-01 11:24:24 -06:00
Ross Thompson	a6917d07f3	Name cleanup.	2023-02-28 17:48:58 -06:00
Ross Thompson	4c0e7f297a	Found the performance bug with the branch predictor btb power saving update.	2023-02-28 15:57:34 -06:00
Ross Thompson	2ebe600f54	Name changes to reflect diagrams.	2023-02-28 15:37:25 -06:00
Ross Thompson	be4823f7dd	Undid the btb update as it reduces performance.	2023-02-28 15:21:56 -06:00
Ross Thompson	9dd3379744	This icpred and btb changes are causing a performance issue.	2023-02-27 20:00:50 -06:00
Ross Thompson	544abe2819	Modified the BTB to save power by not updating when the prediction is unchanged.	2023-02-27 17:37:29 -06:00
Ross Thompson	318189e5e6	Signal name changes.	2023-02-27 00:39:19 -06:00
Ross Thompson	c89812b2d4	Branch predictor cleanup.	2023-02-26 21:28:36 -06:00
Ross Thompson	e8c5e5b5ff	Create module for instruction class prediction and decoding.	2023-02-26 20:20:30 -06:00
Ross Thompson	eb9dc7e67d	gshare cleanup.	2023-02-24 22:55:51 -06:00
Ross Thompson	8bd4a4c35b	Renamed signals to match new figures.	2023-02-24 19:51:47 -06:00
Ross Thompson	f95f326b3d	Renamed signals to match figure 10.18.	2023-02-24 19:22:14 -06:00
Ross Thompson	4031b89f18	Possible fix to btb performance issue.	2023-02-24 18:36:41 -06:00
Ross Thompson	a14dcaa241	Completed critical path gshare fix.	2023-02-24 18:02:00 -06:00
Ross Thompson	31d6531af2	Prep to fix gshare critical path.	2023-02-24 17:54:48 -06:00
Ross Thompson	5db56460b9	Modified btb forwarding logic to reduce critical path.	2023-02-24 17:47:43 -06:00
Ross Thompson	2920179435	Major cleanup of bp.	2023-02-23 16:19:03 -06:00
Ross Thompson	fa49de8391	Partial replacement of InstrClassX with {JalX, RetX, JumpX, and BranchX}.	2023-02-23 15:55:34 -06:00
Ross Thompson	8503982328	Branch predictor cleanup.	2023-02-23 15:15:14 -06:00
Ross Thompson	403b2b7be1	Moved more branch predictor logic into the performance counter block.	2023-02-23 15:14:56 -06:00
Ross Thompson	526f046fb0	Added if generate around bp logic only used with performance counters.	2023-02-23 14:39:31 -06:00
Ross Thompson	2d919fa9e3	Renamed PCPredX to BTAX.	2023-02-23 14:33:32 -06:00
Ross Thompson	5dde3af22e	Oups. Turns out dc_shell does not like string parameters. ... Switched gshare to use an integer parameter to select between gshare and global.	2023-02-22 09:11:46 -06:00
Ross Thompson	7df3a84060	Renamed branch predictors and consolidated global and gshare predictors.	2023-02-20 18:42:37 -06:00
Ross Thompson	6eefa5b1e3	Fixed another bug in the btb.	2023-02-20 17:54:22 -06:00
Ross Thompson	d2b7047744	Fixed forwarding bug in the BTB.	2023-02-20 17:03:45 -06:00
Ross Thompson	545af7697f	Simiplified BTB.	2023-02-20 15:39:42 -06:00
Ross Thompson	4db249ca5d	Simplified BTB by removing the valid bit. the instruction class provides the equivalent information.	2023-02-19 23:53:20 -06:00
Ross Thompson	407d9e7b4a	Merge branch 'main' of https://github.com/openhwgroup/cvw	2023-02-19 22:54:27 -06:00
Ross Thompson	0f98cfe5b4	Simplified branch predictor.	2023-02-19 22:49:48 -06:00
David Harris	d07c6386b2	Added BTB_SIZE parameter independent of BPRED_SIIZE	2023-02-19 20:13:50 -08:00
David Harris	20ced0653c	Parameterized btb to depend on BPRED_SIZE	2023-02-19 19:59:07 -08:00