Ross Thompson
f6c88666cf
may have fixed the global branch history predictor.
...
The solution required a completed rewrite and understanding of how the GHR needs to be speculatively updated and repaired.
2021-05-31 16:11:12 -05:00
Kip Macsai-Goren
0fe63282f8
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-31 11:01:15 -04:00
James E. Stine
46a232b862
Cosmetic changes on integer divider
2021-05-31 09:16:30 -04:00
James E. Stine
9954d16fc9
Add enhancements to integer divider including:
...
- better comments
- optimize FSM to end earlier
- passes for 32-bit or 64-bit depending on parameter to intdiv
Left div.bak in just in case have to revert back to original for now.
2021-05-31 09:12:21 -04:00
James E. Stine
12c34c25f3
Modify elements of generics for LZD and shifter wrote for integer
...
divider.
2021-05-31 08:36:19 -04:00
bbracker
39ae743543
turns out I should not have tried renaming FStallD to FPUStallD because that name was already used! All the same it does feel weird to have two such signals floating around \(ah pun!\)
2021-05-28 23:11:37 -04:00
Kip Macsai-Goren
690815ca51
made priority encoder parameterizable
2021-05-28 18:09:28 -04:00
Ross Thompson
8a035104ac
It's a bit sloppy, but the global history predictor is working correctly now.
...
There were two major bugs with the predictor.
First the update mechanism was completely wrong. The PHT is updated with the GHR that was used to lookup the prediction. PHT[GHR] = Sat2(PHT[GHR], branch outcome).
Second the GHR needs to be updated speculatively as the branch is predicted. This is important so that back to back branches' GHRs are not the same. The must be different to avoid aliasing. Speculation of the GHR update allows them to be different. On mis prediction the GHR must be reverted.
This implementation is a bit sloppy with names and now the GHR recovery is performed. Updates to follow.
2021-05-27 23:06:28 -05:00
Katherine Parry
778ba6bbf5
classify unit created and passes imperas tests
2021-05-27 18:53:55 -04:00
Katherine Parry
1459d840ed
All compare instructions pass imperas tests
2021-05-27 15:23:28 -04:00
Ross Thompson
7e84c3f514
Updated benchmarking code.
2021-05-27 11:48:29 -05:00
Katherine Parry
309e6c3dc1
FADD and FSUB imperas tests pass
2021-05-26 12:33:33 -04:00
James E. Stine
bb99480fca
delete old file for FPregfile
2021-05-26 09:13:09 -05:00
James E. Stine
77260643eb
Add regression test for fpadd
2021-05-26 09:12:37 -05:00
Katherine Parry
e7190b0690
renamed top level FPU wires
2021-05-25 20:04:34 -04:00
Kip Macsai-Goren
33cd133a65
completed mstatus test for rv32p, rv64p, updated testbench to reflect
2021-05-25 15:44:52 -04:00
Kip Macsai-Goren
45e7628e90
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-25 15:28:19 -04:00
Ross Thompson
fec40a1b75
fixed bug with icache miss spill fsm branch.
2021-05-25 14:26:22 -05:00
James E. Stine
bb5404e14a
Update FPregfile to use more compact code and better structure for ease in reading
2021-05-25 13:21:59 -05:00
Ross Thompson
063e458ff0
Merge remote-tracking branch 'refs/remotes/origin/main' into main
2021-05-24 23:25:36 -05:00
Ross Thompson
16e037b8e9
Fixed bug in the two bit sat counter branch predictor. The SRAM needs to be read enabled by StallF.
2021-05-24 23:24:54 -05:00
Kip Macsai-Goren
8ae43a15d4
partially complete MSTATUS test of sd, xs, fs, mie, mpp, mpie, sie, spie bitfields
2021-05-24 20:59:26 -04:00
James E. Stine
c4f3f2f783
Minor cosmetic elements on div.sv
2021-05-24 19:30:28 -05:00
James E. Stine
295263e122
Mod for DIV/REM instruction and update to div.sv unit
2021-05-24 19:29:13 -05:00
bbracker
f755827c90
slightly more path independence for using verilator
2021-05-24 18:11:56 -04:00
bbracker
920dd7bd8d
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-24 17:09:14 -04:00
bbracker
b4bc4b7ee2
peripheral testing standardization
2021-05-24 17:08:40 -04:00
Ross Thompson
c5310e85c1
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-05-24 14:28:41 -05:00
Katherine Parry
90d5fdba04
FMV.X.D imperas test passes
2021-05-24 14:44:30 -04:00
Ross Thompson
65632cb7c9
Fixed minor bug in instruction class decoding.
2021-05-24 13:41:14 -05:00
Ross Thompson
72f77656a3
Fixed bug with instruction classification. The class decoder was incorretly labeling jalr acting as both jalr and jr (no link).
2021-05-24 12:37:16 -05:00
Ross Thompson
8bf411c640
Updated branch predictor tests/benchmarks.
2021-05-24 11:13:33 -05:00
James E. Stine
6f38b7633c
Update header for FPadd
2021-05-24 08:28:16 -05:00
Katherine Parry
70968a4ec3
FSD and FLD imperas tests pass
2021-05-23 18:33:14 -04:00
bbracker
846553ac7d
improved PLIC test organization
2021-05-21 15:13:02 -04:00
James E. Stine
e70136ec78
Minor testbench updates to rv64icfd
2021-05-21 09:41:21 -05:00
James E. Stine
23769e36a5
Update to testbench-imperase for rv64icfd
2021-05-21 09:28:44 -05:00
James E. Stine
fed3b30557
Update to FLD/FSD testbench
2021-05-21 09:26:55 -05:00
James E. Stine
c89d3e01bb
Update to rv64icfd wally-config to run through FP tests
2021-05-21 09:22:17 -05:00
Katherine Parry
4db7f3065c
FMV.D.X imperas test passes
2021-05-20 22:18:33 -04:00
Katherine Parry
06af239e6c
FMV.D.X imperas test passes
2021-05-20 22:17:59 -04:00
bbracker
1d3db5ead5
small bit of busybear debug progress
2021-05-19 20:18:00 -04:00
bbracker
bf6337f2f7
plic implementation optimizations
2021-05-19 18:10:48 +00:00
bbracker
979a9bf037
commented out MSTATUS test
2021-05-19 12:38:01 -04:00
James E. Stine
304e70d3ae
Update rv64icfd batch script
2021-05-18 16:01:53 -05:00
James E. Stine
44dc665fc5
Mod to config to properly add FP stuff - for icfd test. Should not change regression test through Imperas as just mod to testbench (add tests64d/tests64f but remove from MISA)
2021-05-18 13:48:44 -05:00
bbracker
e4d51ebef5
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-18 14:33:40 -04:00
bbracker
c495fc71f1
changed lint script to use absolute path for verilator because cron jobs stink at using paths
2021-05-18 14:33:22 -04:00
David Harris
26531f2634
fixed rv64mmu makefile
2021-05-18 14:25:55 -04:00
David Harris
5da159d17e
Removed rv64wally
2021-05-18 14:08:46 -04:00
