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99 Commits

Author SHA1 Message Date
Ross Thompson
e56497101a Updated source code to be compatible with verilator 5.011 for lint only. 2023-05-31 10:44:23 -05:00
Ross Thompson
903f2f9063 Merge branch 'param-lim-merge' 2023-05-26 16:25:35 -05:00
Ross Thompson
340aac0934 Got the branch predictor parameterized using Lim's method. Also had to add a global enum included in both cvw.sv and the configs which defines the branch predictor types. This should be synthesizable, but I'll need to double check. 2023-05-26 16:00:14 -05:00
Ross Thompson
3de3a42f97 Merged changes. 2023-05-24 13:15:52 -05:00
Ross Thompson
b28a75f32a Updated headers to local branch history predictors. 2023-05-24 12:52:42 -05:00
Ross Thompson
6163fc29e1 Adds local history predictor. 
Fixes performance counters, but not coremark.
 2023-05-23 18:53:46 -05:00
Ross Thompson
03823a9bc1 Partially working local history repair. 2023-05-11 14:56:26 -05:00
Ross Thompson
e34b25511a Baseline localhistory with speculative repair built. 2023-05-05 15:23:45 -05:00
Ross Thompson
faf71294d6 Fixed bug in local history predictor. 2023-05-04 16:54:41 -05:00
Ross Thompson
e11d42b270 Almost working ahead pipelined local history predictor. 2023-05-04 16:17:31 -05:00
Ross Thompson
8da2b18543 Maybe I finally have the ahead pipelined local history predictor working. 2023-05-04 14:11:34 -05:00
Ross Thompson
afafa9718d Ahead pipelining is not yet working. :( 2023-05-03 17:41:38 -05:00
Ross Thompson
35a59a1193 I think ahead pipelining is working for local history. 2023-05-03 12:52:32 -05:00
Ross Thompson
c4d6724867 Updated configs for local branch history `defines. 2023-05-02 11:11:04 -05:00
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