Ross Thompson
5bc2a8b346
Now have global history working correctly.
2021-06-01 10:57:43 -05:00
James E. Stine
927aec34a2
Modify muldiv.sv to handle W instructions for 64-bits
2021-05-31 23:27:42 -04:00
Ross Thompson
1db8d0e59c
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
42af5f9818
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-31 11:01:15 -04:00
James E. Stine
a71b97e878
Cosmetic changes on integer divider
2021-05-31 09:16:30 -04:00
James E. Stine
2f365a9e07
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
889b935630
Modify elements of generics for LZD and shifter wrote for integer
...
divider.
2021-05-31 08:36:19 -04:00
bbracker
a45b61ede9
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
529226ac8d
made priority encoder parameterizable
2021-05-28 18:09:28 -04:00
Ross Thompson
40bdcda32d
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
0646e08609
classify unit created and passes imperas tests
2021-05-27 18:53:55 -04:00
Katherine Parry
65eca433b6
All compare instructions pass imperas tests
2021-05-27 15:23:28 -04:00
Ross Thompson
668a79cf77
Updated benchmarking code.
2021-05-27 11:48:29 -05:00
Katherine Parry
bd05de0dbb
FADD and FSUB imperas tests pass
2021-05-26 12:33:33 -04:00
James E. Stine
e3b3321f91
delete old file for FPregfile
2021-05-26 09:13:09 -05:00
James E. Stine
cc2a7ced7f
Add regression test for fpadd
2021-05-26 09:12:37 -05:00
Katherine Parry
3869a73a9c
renamed top level FPU wires
2021-05-25 20:04:34 -04:00
Kip Macsai-Goren
d74803701b
completed mstatus test for rv32p, rv64p, updated testbench to reflect
2021-05-25 15:44:52 -04:00
Kip Macsai-Goren
32923cb250
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-25 15:28:19 -04:00
Ross Thompson
735e511073
fixed bug with icache miss spill fsm branch.
2021-05-25 14:26:22 -05:00
James E. Stine
e32e812f6a
Update FPregfile to use more compact code and better structure for ease in reading
2021-05-25 13:21:59 -05:00
Ross Thompson
aa9a81b760
Merge remote-tracking branch 'refs/remotes/origin/main' into main
2021-05-24 23:25:36 -05:00
Ross Thompson
13034c7406
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
ba134eb166
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
bbc1dfb309
Minor cosmetic elements on div.sv
2021-05-24 19:30:28 -05:00
James E. Stine
1704fdc877
Mod for DIV/REM instruction and update to div.sv unit
2021-05-24 19:29:13 -05:00
bbracker
82a6ee4c0e
slightly more path independence for using verilator
2021-05-24 18:11:56 -04:00
bbracker
d7405e476e
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-24 17:09:14 -04:00
bbracker
7e2073e482
peripheral testing standardization
2021-05-24 17:08:40 -04:00
Ross Thompson
3c5e87d6c2
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-05-24 14:28:41 -05:00
Katherine Parry
03aea055fa
FMV.X.D imperas test passes
2021-05-24 14:44:30 -04:00
Ross Thompson
dd26b754eb
Fixed minor bug in instruction class decoding.
2021-05-24 13:41:14 -05:00
Ross Thompson
b06fda88ff
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
daf344f1ba
Updated branch predictor tests/benchmarks.
2021-05-24 11:13:33 -05:00
James E. Stine
194c32defa
Update header for FPadd
2021-05-24 08:28:16 -05:00
Katherine Parry
55f22979ca
FSD and FLD imperas tests pass
2021-05-23 18:33:14 -04:00
bbracker
142b02b30a
improved PLIC test organization
2021-05-21 15:13:02 -04:00
James E. Stine
49a4097d97
Minor testbench updates to rv64icfd
2021-05-21 09:41:21 -05:00
James E. Stine
47487a625f
Update to testbench-imperase for rv64icfd
2021-05-21 09:28:44 -05:00
James E. Stine
694e21541b
Update to FLD/FSD testbench
2021-05-21 09:26:55 -05:00
James E. Stine
474d479280
Update to rv64icfd wally-config to run through FP tests
2021-05-21 09:22:17 -05:00
Katherine Parry
67a41748ba
FMV.D.X imperas test passes
2021-05-20 22:18:33 -04:00
Katherine Parry
71e4a10efb
FMV.D.X imperas test passes
2021-05-20 22:17:59 -04:00
bbracker
114bba8370
small bit of busybear debug progress
2021-05-19 20:18:00 -04:00
bbracker
8554f2f3cd
plic implementation optimizations
2021-05-19 18:10:48 +00:00
bbracker
fd4fae0406
commented out MSTATUS test
2021-05-19 12:38:01 -04:00
James E. Stine
058b265d18
Update rv64icfd batch script
2021-05-18 16:01:53 -05:00
James E. Stine
f407bee5ae
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
18ab9015f9
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-05-18 14:33:40 -04:00
bbracker
f43ea946aa
changed lint script to use absolute path for verilator because cron jobs stink at using paths
2021-05-18 14:33:22 -04:00
