95 Commits

Author	SHA1	Message	Date
David Harris	a445e53e8d	Fixed Issue #106: fld rasies load access fault instead of illegal instruction. The IEU controller had considered all fp loads and stores to be legal regardless of whether the FPU is enabled or the type is supported. Merged illegal instruction detection from both units into the Decode stage, saving two bits of pipeline register as well.	2023-02-21 09:32:17 -08:00
Ross Thompson	7f0d64d0a6	Fixed typo in the global branch predictor.	2023-02-20 18:48:02 -06:00
Ross Thompson	2c2c1b5221	Cleanup branch predictor files.	2023-02-20 18:45:45 -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
David Harris	36b2d530c4	Merge pull request #98 from ross144/main ... New gshare implementation	2023-02-20 11:27:47 -08:00
David Harris	626715befd	Fixed IROM size parameters	2023-02-20 05:32:43 -08:00
David Harris	472c7da399	New expression for BTB_SIZE to avoid error during sky90 synthesis	2023-02-20 04:02:00 -08:00
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
Ross Thompson	89aa57e25e	Possibly much better branch predictor implemention. ... The complexity is significantly reduced.	2023-02-19 00:17:37 -06:00
Ross Thompson	9f997eb5d0	Minor fix.	2023-02-18 23:55:46 -06:00
David Harris	92d4acf118	Removed unused PredInstrClassE register from bpred	2023-02-18 05:59:25 -08:00
Ross Thompson	ae8b01b8d4	Renamed globalhistory predictor.	2023-02-17 16:08:34 -06:00
Ross Thompson	2661ec97d8	Fixed global history predictor.	2023-02-17 16:05:48 -06:00
Ross Thompson	a98a85f144	More updates.	2023-02-17 15:53:49 -06:00
Ross Thompson	1d9335c934	Updated global history predictor.	2023-02-17 15:53:15 -06:00
Ross Thompson	e0a8974c7d	Fixed a branch predictor performance issue.	2023-02-17 15:37:03 -06:00
Ross Thompson	3398c5156b	Fixed bug with branch predictor.	2023-02-17 10:57:50 -06:00
Ross Thompson	911023f441	Merge branch 'main' of github.com:ross144/cvw	2023-02-13 18:54:07 -06:00
Ross Thompson	fc3baa6846	Updated gshare (no speculation) to have better performance.	2023-02-13 18:52:52 -06:00
Ross Thompson	f3c8c6e60a	More fixeds to global history.	2023-02-13 18:08:51 -06:00
Ross Thompson	6ea830cf44	Fixed global history predictor.	2023-02-13 18:08:13 -06:00
Ross Thompson	3847d9e39a	Updated global history predictor.	2023-02-13 18:07:32 -06:00
Ross Thompson	1ab2d0d19b	Fixed bug in basic gshare implementation. Should be a better comparison to the speculative versions now.	2023-02-13 17:57:05 -06:00
Ross Thompson	c18ac35332	Created copy of gshare. I think there may be a simpler implementation.	2023-02-13 17:29:51 -06:00
Ross Thompson	10b45ed6c7	Further branch predictor improvements.	2023-02-13 17:23:56 -06:00
Ross Thompson	1cfdd201a5	Partial improvement.	2023-02-13 17:10:24 -06:00
Ross Thompson	0165fd54b4	Hacked commit. Fixes the gshare bugs introduced last week. ... Need to recover the good changes in the next commit.	2023-02-13 16:14:17 -06:00
Ross Thompson	716fbca2b1	Partial fix for gshare bugs from the last two weeks.	2023-02-13 11:57:25 -06:00
Ross Thompson	51158e94ba	Removed another bit from btb class.	2023-02-12 11:33:43 -06:00
Ross Thompson	91fc883f6a	More simplifications to the BP.	2023-02-10 17:09:35 -06:00
Ross Thompson	6fbca64eb7	Experimental branch prediction optimization.	2023-02-10 15:45:56 -06:00
Ross Thompson	ca0eb5a591	Modified branch predictor to use InstrValidE and InstrValidD rather than the more complex InstrClassE | WrongClassE logic.	2023-02-10 10:33:10 -06:00
Ross Thompson	91427ed72d	RAS and RAS documentation now consistent.	2023-02-10 09:06:51 -06:00
Ross Thompson	2d7749db7f	Updated globalhistory predictor.	2023-02-09 14:48:02 -06:00
Ross Thompson	962c018991	Simplified branch predictor.	2023-02-08 18:24:38 -06:00
Ross Thompson	0678f3f2b7	Branch predictor cleanup.	2023-02-07 14:01:59 -06:00
David Harris	6b9ae4fc89	Fixed merge issues on synthDC PR	2023-02-04 04:13:40 -08:00
David Harris	78eb90715c	Removed pipelined level of hierarchy	2023-02-02 14:14:11 -08:00