Andrew Waterman
5332bab6f1
expose FMA ports outside of FPU (for the VU)
2012-02-23 17:39:34 -08:00
Andrew Waterman
6ceaa0e80a
correct and simplify replay_next logic
2012-02-23 16:52:52 -08:00
Andrew Waterman
f939088be1
move datapath control signals into control unit
...
because that's where control signals go
2012-02-23 16:52:52 -08:00
Yunsup Lee
e53792a1eb
fix bug in rocket's vector datapath related to wakeup
2012-02-23 10:14:14 -08:00
Andrew Waterman
7c929afe2b
HTIF now controls CPU reset
2012-02-22 19:30:03 -08:00
Andrew Waterman
3eebf40310
nack CPU requests during any replay
2012-02-22 18:37:13 -08:00
Henry Cook
62837537f4
Improved TileIO organization, beginnings of hub implementation
2012-02-22 18:24:52 -08:00
Henry Cook
24a32c2811
Refining tilelink interface
2012-02-22 12:15:47 -08:00
Henry Cook
18bd0c232b
Added coherence message type enums
2012-02-22 12:15:47 -08:00
Daiwei Li
22f8dd0994
Hook up resp_type to vector unit
2012-02-21 18:20:32 -08:00
Andrew Waterman
cfd79c731b
add resp_type to ext_mem interface
2012-02-21 17:42:00 -08:00
Andrew Waterman
9a80adef50
only instantiate VI$ if HAVE_VEC
2012-02-21 15:53:19 -08:00
Andrew Waterman
c8f768c8b3
fix AMO replay bug
...
like the recent AMO bug fix, but affects stores too. oops.
2012-02-21 14:39:54 -08:00
Andrew Waterman
d5608b2728
fix AMO replay bug
...
didn't check for structural hazard on AMO unit
if a replay was initiated one cycle before before
a hit-under-miss AMO was issued
2012-02-21 01:02:16 -08:00
Andrew Waterman
6135615104
unify cache backend interfaces; generify arbiter
2012-02-20 00:51:48 -08:00
Andrew Waterman
7034c9be65
new htif protocol and implementation
...
You must update your fesvr and isasim!
2012-02-19 23:15:45 -08:00
Andrew Waterman
9af86633d7
invalidate I$ prefetcher when invalidating I$
2012-02-17 17:56:01 -08:00
Henry Cook
e555fd3fc4
Abstract class for coherence policies
2012-02-16 12:59:38 -08:00
Henry Cook
d46e59a16d
Abstract base nbcache class
2012-02-16 12:34:51 -08:00
Henry Cook
124efe5281
Replace nbcache manipulation of meta state bits with abstracted functions
2012-02-16 10:43:40 -08:00
Henry Cook
619929eba1
Added coherence tile function defs, with traits and constants
2012-02-16 00:16:45 -08:00
Andrew Waterman
1b5e39e7fc
fix bug in BTB
...
a BTB update followed by a taken branch could cause incorrect control flow.
2012-02-15 21:36:08 -08:00
Andrew Waterman
fc5ba769da
disable vector unit by default
2012-02-15 18:58:41 -08:00
Andrew Waterman
8b3b3abd3d
fix external memory request nack logic
2012-02-15 18:57:40 -08:00
Andrew Waterman
fe2c1d1321
add vec->ctrl fences
2012-02-15 18:31:19 -08:00
Yunsup Lee
82cd3625c2
add in vackq interface
2012-02-15 17:53:24 -08:00
Andrew Waterman
c13524ad3a
fix vcmdq full replay logic
2012-02-15 17:49:12 -08:00
Yunsup Lee
258d050e1b
add stall logic for vector command queues
2012-02-15 14:48:41 -08:00
Yunsup Lee
32bdf5098a
refactor vector control logic & datapath in the rocket core
2012-02-15 13:30:22 -08:00
Yunsup Lee
7c11c1406c
vector-vector add working!
2012-02-15 02:28:07 -08:00
Yunsup Lee
6bdf9dc513
hwacha integration: now it compiles correctly!
2012-02-14 23:34:57 -08:00
Yunsup Lee
a51c7cc927
new build system with updated chisel, hwacha
2012-02-14 19:43:59 -08:00
Andrew Waterman
0ec7767c13
declaring success on FPU for now
2012-02-14 19:11:57 -08:00
Andrew Waterman
297223a13c
squash subsequent external mem request after nack
2012-02-14 15:12:16 -08:00
Andrew Waterman
38c67e5a9e
add fmin.[s|d] and fmax.[s|d]
2012-02-14 06:37:18 -08:00
Andrew Waterman
ee9fc10668
add fcvt.s.d, fcvt.d.s
2012-02-14 06:03:43 -08:00
Andrew Waterman
ce202c73d1
add fsgnj[n|x].[s|d]
2012-02-14 04:24:35 -08:00
Andrew Waterman
1d604bcd49
remove top-level Makefile
...
new, simpler build instructions are in the README.
note that for "make run-asm-tests-debug" you need to update your fesvr.
2012-02-14 02:53:43 -08:00
Andrew Waterman
15dc2d8c40
add fp writeback arbitration logic
2012-02-14 00:32:25 -08:00
Henry Cook
0671a99712
NBcache works with associativities other than powers of 2
2012-02-13 21:44:32 -08:00
Henry Cook
6d36168183
Fixed two associative nbcache bugs, one in amo replays and one in the flush unit
2012-02-13 21:44:32 -08:00
Andrew Waterman
0366465cb1
parameterize the scoreboards
2012-02-13 18:12:23 -08:00
Andrew Waterman
6c2d8a37ae
remove a partial update that makes chisel barf
...
chisel regards it as a combinational loop, even though it isn't.
2012-02-13 16:45:29 -08:00
Andrew Waterman
c78c738f60
minor cleanups
2012-02-13 03:13:49 -08:00
Andrew Waterman
b5a19a54a3
add fcvt.[s|d].[w|l][u]
2012-02-13 02:01:26 -08:00
Andrew Waterman
a4a9d2312c
add fcvt.[w|l][u].[s|d], f[eq|lt|le].[s|d]
2012-02-13 01:30:01 -08:00
Andrew Waterman
069037ff3a
add FP recoding
2012-02-12 23:31:50 -08:00
Andrew Waterman
25ecfb9bbc
clean up caches
...
- remove incompatible blocking D$
- remove direct-mapped nonblocking cache
2012-02-12 20:32:06 -08:00
Andrew Waterman
08b6517a23
add FP ops mftx, mxtf, mtfsr, mffsr
2012-02-12 20:12:53 -08:00
Andrew Waterman
9bb1558a34
WIP on FPU
2012-02-12 04:36:01 -08:00
Andrew Waterman
50a283d311
move store data generation into EX stage
...
doing so removes it from the critical path of FP store unrecoding.
2012-02-12 01:35:55 -08:00
Andrew Waterman
725190d0ee
update to new chisel
2012-02-11 17:20:33 -08:00
Andrew Waterman
f8b937d590
fix 32-bit divider bug
...
thanks, torture!
also, tidied up the code a bit.
2012-02-09 03:47:59 -08:00
Andrew Waterman
03ee49f424
fix 32-bit AMOs to upper halves of 64-bit words
...
thanks, torture!
2012-02-09 03:31:47 -08:00
Yunsup Lee
f47d888feb
vvcfgivl and vsetvl works
2012-02-09 02:35:21 -08:00
Andrew Waterman
92493ad153
fix mul/div kill bug
...
occasionally, an in-progress multiply or divide could be
erroneously killed, tying up the register forever.
2012-02-09 02:26:03 -08:00
Andrew Waterman
128ec567ed
make BTB fully associative; don't use it for JALR
...
JALR created a long path from the ALU in execute stage
to an address comparator to the next-PC mux. the benfit
was close to nil, anyway.
2012-02-09 01:34:00 -08:00
Yunsup Lee
fcc8081c4d
hook up the vector command queue
2012-02-09 01:28:16 -08:00
Andrew Waterman
8b6b0f5367
add external memory request interface for vec unit
2012-02-08 22:30:45 -08:00
Yunsup Lee
9285a52f25
initial vu integration
2012-02-08 21:43:45 -08:00
Andrew Waterman
10b5a0006c
fix mul/div to rd=0
2012-02-08 20:11:57 -08:00
Andrew Waterman
a1855b12c2
clean up queues
2012-02-08 17:55:05 -08:00
Andrew Waterman
990e3a1b34
fix fpu port direction bug
2012-02-08 15:19:26 -08:00
Andrew Waterman
b3f6f9a5fd
fix BTB misprediction check for negative addresses
...
also index BTB with PC, not PC+4
2012-02-08 15:05:28 -08:00
Andrew Waterman
e9da2cf66a
improve id/ex datapath
...
move operand selection into decode stage; simplify bypassing
2012-02-08 06:47:26 -08:00
Andrew Waterman
d471a8b2da
arbitrate for LLFU writebacks in MEM stage
2012-02-08 04:21:05 -08:00
Andrew Waterman
ebed56500e
fix mul/wb hazard checks
...
I erroneously assumed that those instructions set id_wen.
2012-02-08 01:56:11 -08:00
Andrew Waterman
5403d069e9
add fp loads/stores
2012-02-07 23:54:25 -08:00
Christopher Celio
1be9d15944
Fixed bug regarding case sensitivity regarding ioICache,ioDCache
2012-02-07 14:07:42 -08:00
Andrew Waterman
fde8e3b696
clean up bypassing/hazard checking a bit
2012-02-06 17:26:45 -08:00
Henry Cook
41c4e10c37
Workaround for another frakking extraction error in the C backend. C and VLSI backends now both boot kernel with associativity on
2012-02-02 21:53:57 -08:00
Andrew Waterman
99a959e6b1
remove pc+4 piperegs and add new ex pc+4 adder
2012-02-02 13:33:27 -08:00
Andrew Waterman
01a156eb98
make # of dcache lines configurable
2012-02-01 21:11:45 -08:00
Andrew Waterman
b1bbf56b74
clean up wb->id bypass
2012-02-01 16:41:18 -08:00
Henry Cook
c5a4eaa0a1
Associative cache, boots kernel
2012-02-01 13:26:04 -08:00
Henry Cook
281abfbccb
New Mux1H constructor
2012-02-01 13:24:28 -08:00
Andrew Waterman
38c9105ea1
fix mul/div deadlock bug
...
If independent multiplies or independent divides were issued
back-to-back, the second wouldn't execute, causing the register
to be busy forever.
2012-01-30 21:14:28 -08:00
Andrew Waterman
bd241ea237
fix when badvaddr is set
2012-01-30 17:15:42 -08:00
Andrew Waterman
a96c92f58d
enable amomin[u]/amomax[u
2012-01-26 20:45:04 -08:00
Andrew Waterman
a7999d4525
don't flush I$ unless fence.i commits
...
otherwise, we might not make forward progress.
2012-01-26 20:37:09 -08:00
Andrew Waterman
32f5f420f3
Merge branch 'master' of github.com:ucb-bar/riscv-rocket
2012-01-26 20:12:42 -08:00
Andrew Waterman
41855a6d47
fix missing "otherwise" in PCR file
...
this fixes timer interrupts for VLSI backend.
2012-01-26 19:33:55 -08:00
Andrew Waterman
7172ddd050
don't flush pipeline after MFPCR
2012-01-24 18:40:08 -08:00
Andrew Waterman
97c379f1d7
made I$ associative
2012-01-24 16:51:30 -08:00
Henry Cook
aa3465699b
LFSR now a util
2012-01-24 15:26:19 -08:00
Andrew Waterman
7f26fe2c44
make icache size parameterizable
2012-01-24 15:13:49 -08:00
Henry Cook
8229d65adf
Associative cache passes asm tests and bmarks with power of 2 associativities (including 1)
2012-01-24 11:41:44 -08:00
Andrew Waterman
9e6b86fe85
Fix a nasty replay bug
...
If a mispredicted branch was followed by an instruction dependent
on a load that missed in the cache, the mispredicted path would
be executed rather than the correct path. Fail.
Example broken code:
lw x2, 0(x2) # cache miss
beq x3, x0, somewhere # mispredicted branch
move x4, x2 # wrong-path instruction dependent on load miss
2012-01-24 03:40:01 -08:00
Andrew Waterman
06fdf79dab
fix long-latency writeback arbitration bug
2012-01-24 00:56:47 -08:00
Andrew Waterman
f1c355e3cd
check pc/effective address sign extension
2012-01-24 00:15:17 -08:00
Andrew Waterman
a5a020f97b
update chisel and remove SRAM_READ_LATENCY
2012-01-23 20:59:38 -08:00
Henry Cook
8766438bb9
Updated chisel removes ^^ from language. Removed from rocket source, updated jar.
2012-01-23 17:09:23 -08:00
Andrew Waterman
e7bf07d55e
fix AMO replay bug
2012-01-23 15:35:53 -08:00
Andrew Waterman
d59bddfbf1
fix I$ miss replay bug
2012-01-21 20:42:13 -08:00
Andrew Waterman
31c56228e2
add missing "otherwise"
2012-01-21 20:13:15 -08:00
Henry Cook
97f0852b17
DM cache with assoc-aware subunits passes all asm and bmarks
2012-01-18 17:53:26 -08:00
Henry Cook
8623d58724
split into two caches, compiles
2012-01-18 17:09:35 -08:00
Henry Cook
29ed8eb31a
More utils for nbdcache
2012-01-18 17:09:35 -08:00
Henry Cook
7e25749581
Groundwork for assoc cache implementation
2012-01-18 17:09:35 -08:00
Andrew Waterman
07f184df2f
adhere to new chisel c naming convention
2012-01-18 15:23:21 -08:00