85 Commits

Author	SHA1	Message	Date
Ross Thompson	9ee6ba8964	Added comment explaining the difference between global history and local history basic implementations.	2023-05-02 11:01:46 -05:00
Ross Thompson	799c25cc60	Swapped the m and k parameters for local history predictor.	2023-05-02 10:52:41 -05:00
Ross Thompson	b9abb2a491	Maybe have the baseline local history predictor working.	2023-05-01 15:45:27 -05:00
Ross Thompson	89a242d143	Might actually have a correct implementation of local history branch prediction.	2023-04-24 13:05:28 -05:00
Ross Thompson	7588de5a36	Fixed the local branch predictor so that it at least compiles.	2023-04-24 11:06:53 -05:00
Limnanthes Serafini	95223bf11c	More cleanup	2023-04-13 21:34:50 -07:00
David Harris	495f2ed274	Improved RAS predictor coverage by eliminating unreachable StallM term	2023-04-07 21:37:12 -07:00
Ross Thompson	730f3ac84e	Fixed all tap/space issue in RTL.	2023-03-24 17:32:25 -05:00
Ross Thompson	ede9d49ce4	Changes BTA to BPBTA.	2023-03-12 14:36:46 -05:00
Ross Thompson	7dd8fa16c1	Renamed BTB misprediction to BTA.	2023-03-03 00:18:34 -06:00
Ross Thompson	3d1ffac7d7	Cleaned up branch predictor performance counters.	2023-03-01 17:05:42 -06:00
Ross Thompson	a61f8bc4cf	Set bp to use instruction class prediction by default.	2023-03-01 11:52:42 -06:00
Ross Thompson	e8744684cd	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	08a1153ae9	More btb cleanup.	2023-03-01 10:47:00 -06:00
Ross Thompson	dd2433f7ff	Minor fix to btb.	2023-03-01 10:45:40 -06:00
Ross Thompson	2773048bd4	Name cleanup.	2023-02-28 17:48:58 -06:00
Ross Thompson	87013ccaf0	Found the performance bug with the branch predictor btb power saving update.	2023-02-28 15:57:34 -06:00
Ross Thompson	8af61c0cc0	Name changes to reflect diagrams.	2023-02-28 15:37:25 -06:00
Ross Thompson	a823d8d021	Undid the btb update as it reduces performance.	2023-02-28 15:21:56 -06:00
Ross Thompson	3261f31e88	This icpred and btb changes are causing a performance issue.	2023-02-27 20:00:50 -06:00
Ross Thompson	69e8358639	Modified the BTB to save power by not updating when the prediction is unchanged.	2023-02-27 17:37:29 -06:00
Ross Thompson	a81cc883e9	Signal name changes.	2023-02-27 00:39:19 -06:00
Ross Thompson	447f6b1443	Branch predictor cleanup.	2023-02-26 21:28:36 -06:00
Ross Thompson	3804626166	Create module for instruction class prediction and decoding.	2023-02-26 20:20:30 -06:00
Ross Thompson	7500bb75c6	PHT was enabled using the wrong ~flush and ~stall.	2023-02-24 22:57:32 -06:00
Ross Thompson	63b9f9ca3d	gshare cleanup.	2023-02-24 22:55:51 -06:00
Ross Thompson	ed7ab402ad	More signal renames.	2023-02-24 19:56:55 -06:00
Ross Thompson	e549bec060	Renamed signals to match new figures.	2023-02-24 19:51:47 -06:00
Ross Thompson	6ff524d843	Renamed signals to match figure 10.18.	2023-02-24 19:22:14 -06:00
Ross Thompson	4058a49985	Possible fix to btb performance issue.	2023-02-24 18:36:41 -06:00
Ross Thompson	5c52827f51	Cleanup.	2023-02-24 18:20:42 -06:00
Ross Thompson	d030d323fd	Completed critical path gshare fix.	2023-02-24 18:02:00 -06:00
Ross Thompson	c2021927ce	Prep to fix gshare critical path.	2023-02-24 17:54:48 -06:00
Ross Thompson	4ffaa75c2a	Modified btb forwarding logic to reduce critical path.	2023-02-24 17:47:43 -06:00
Ross Thompson	6e8791a0a5	Major cleanup of bp.	2023-02-23 16:19:03 -06:00
Ross Thompson	d880720b7e	Partial replacement of InstrClassX with {JalX, RetX, JumpX, and BranchX}.	2023-02-23 15:55:34 -06:00
Ross Thompson	500764f97b	Branch predictor cleanup.	2023-02-23 15:15:14 -06:00
Ross Thompson	70f7f59332	Moved more branch predictor logic into the performance counter block.	2023-02-23 15:14:56 -06:00
Ross Thompson	195343c84f	Added if generate around bp logic only used with performance counters.	2023-02-23 14:39:31 -06:00
Ross Thompson	ed91fc5ce3	Renamed PCPredX to BTAX.	2023-02-23 14:33:32 -06:00
Ross Thompson	1af7b8051e	Fixed bug in basic gshare.	2023-02-22 12:54:46 -06:00
Ross Thompson	5ecbc830cf	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	fd5c12431e	Fixed typo in the global branch predictor.	2023-02-20 18:48:02 -06:00
Ross Thompson	d2e06d9ef0	Cleanup branch predictor files.	2023-02-20 18:45:45 -06:00
Ross Thompson	a14c71bd95	Renamed branch predictors and consolidated global and gshare predictors.	2023-02-20 18:42:37 -06:00
Ross Thompson	68e39eeb66	Fixed another bug in the btb.	2023-02-20 17:54:22 -06:00
Ross Thompson	5187c78184	Fixed forwarding bug in the BTB.	2023-02-20 17:03:45 -06:00
Ross Thompson	1982c66b72	Simiplified BTB.	2023-02-20 15:39:42 -06:00
David Harris	081a817925	Merge pull request #98 from ross144/main ... New gshare implementation	2023-02-20 11:27:47 -08:00
David Harris	1d3b41e0fb	New expression for BTB_SIZE to avoid error during sky90 synthesis	2023-02-20 04:02:00 -08:00