riscv/rocket-chip
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50a283d311
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67 Commits

Author SHA1 Message Date
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
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
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
5403d069e9 add fp loads/stores 2012-02-07 23:54:25 -08:00
Andrew Waterman
fde8e3b696 clean up bypassing/hazard checking a bit 2012-02-06 17:26:45 -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
b1bbf56b74 clean up wb->id bypass 2012-02-01 16:41:18 -08:00
Andrew Waterman
f1c355e3cd check pc/effective address sign extension 2012-01-24 00:15:17 -08:00
Henry Cook
8766438bb9 Updated chisel removes ^^ from language. Removed from rocket source, updated jar. 2012-01-23 17:09:23 -08:00
Henry Cook
1d76255dc1 new chisel version jar and find and replace INPUT and OUTPUT 2012-01-18 14:39:57 -08:00
Andrew Waterman
0369b05deb move replays to writeback stage 2012-01-17 21:12:31 -08:00
Andrew Waterman
bcb55e581a remove host.start signal, use reset instead 2012-01-11 17:49:32 -08:00
Andrew Waterman
20aee36c96 move PCR writes to WB stage 2012-01-02 15:42:39 -08:00
Andrew Waterman
3045b33460 remove second RF write port 
load miss writebacks are treated like mul/div now.
 2012-01-02 02:51:30 -08:00
Andrew Waterman
ffe23a1ee8 fix WAW hazard handling 2012-01-02 00:25:11 -08:00
Andrew Waterman
eb657dd250 reduce superfluous replays 
we only replay after a cache miss if we mis-scheduled the use of a load.
 2012-01-01 21:28:38 -08:00
Andrew Waterman
efc623cc36 validate BTB address and use BTB for J/JAL/JR/JALR 
even if we weren't using the BTB for JR/JALR, we'd need to
flush the BTB on FENCE.I and on context switches, but
validating its result suffices instead.
 2012-01-01 17:04:14 -08:00
Andrew Waterman
2f8fcebea0 remove datapath register resets resets 2012-01-01 16:09:40 -08:00
Andrew Waterman
733fc8e65e booth multiplier 2011-12-20 03:49:07 -08:00
Andrew Waterman
b5a8b6dc73 fix divider for RV32 2011-12-19 16:57:53 -08:00
Andrew Waterman
bcceb08373 add dummy mul_rdy signal 2011-12-17 07:30:47 -08:00
Andrew Waterman
82700cad72 fix multiplier for rv32 2011-12-17 07:20:00 -08:00
Andrew Waterman
56c4f44c2a hellacache returns! 
but AMOs are unimplemented.
 2011-12-12 06:49:39 -08:00
Andrew Waterman
ce201559f3 Support cache->cpu nacks one cycle after request 2011-12-10 00:42:09 -08:00
Andrew Waterman
c01e1f1cef Don't replay from EX stage. 
EX replays are now handled from MEM.  We may move them to WB.
 2011-12-09 19:42:58 -08:00
Rimas Avizienis
e70b41241c changed branch addr generation to get it off critical path 2011-12-02 01:56:17 -08:00
Rimas Avizienis
da2fdf4f85 fixed console i/o 2011-11-30 22:51:59 -08:00
Rimas Avizienis
bc44572d99 bugfixes due to new hcl jar file 2011-11-30 21:54:55 -08:00
Rimas Avizienis
11f0e3daf4 more cleanup 2011-11-18 00:17:30 -08:00
Rimas Avizienis
c42d8149b7 moved PCR writeback to end of MEM stage, cleanup of dcache/dpath/ctrl 2011-11-17 23:50:45 -08:00
Rimas Avizienis
80b4253318 fixed dcache amo bug, cleaned up testharness, added RDTIME instruction 2011-11-16 02:04:28 -08:00
Rimas Avizienis
886857fa47 writes of PC weren't being sign extended 2011-11-15 18:07:36 -08:00
Rimas Avizienis
48cec01710 updated riscv-bmarks and riscv-tests to build with new toolchain 2011-11-15 00:11:22 -08:00
Rimas Avizienis
cd6e463320 added ei and di instructions 2011-11-14 13:48:49 -08:00
Rimas Avizienis
b791010bb1 flush.i invalidates I$ & ITLB, writing PTBR invalidates both TLBs 2011-11-14 04:13:13 -08:00
Rimas Avizienis
890bfa7c48 added IPIs and timer interrupts 2011-11-14 03:24:02 -08:00
Rimas Avizienis
5b29765917 synced up with supervisor mode state in latest ISA simulator 2011-11-14 01:37:20 -08:00
Rimas Avizienis
44419511b7 timer interrupt fixes 2011-11-13 00:32:08 -08:00
Rimas Avizienis
f86d5b1334 cleanup, lots of minor fixes, added more PCR regs (COREID, NUMCORES), parameterized BTB 2011-11-10 11:26:13 -08:00
Rimas Avizienis
4bd0263a4a added misaligned instruction check, cleaned up badvaddr handling 2011-11-10 03:38:59 -08:00
Rimas Avizienis
603ede8bfe access faults now write badvaddr PCR register with faulting address 2011-11-10 02:46:09 -08:00