 Andrew Waterman
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de492b3cf7
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Fix critical path through integer scoreboard
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2014-04-15 21:28:13 -07:00 |
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Andrew Waterman
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f235fa0db6
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Move branch resolution to M stage
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2014-04-07 15:58:49 -07:00 |
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Andrew Waterman
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db59fc65ab
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Add return address stack
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2014-04-01 15:01:27 -07:00 |
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Andrew Waterman
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1b030777ce
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Remove vestigial control signal
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2014-03-24 04:36:12 -07:00 |
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Andrew Waterman
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943d7ac80a
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Use LinkedHashSet/Map for simpler determinism
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2014-03-15 17:31:48 -07:00 |
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 Donggyu Kim
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53d62cb69d
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remove nondeterminism
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2014-03-15 16:45:58 -07:00 |
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Andrew Waterman
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00bc1a2293
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Add fclass.{s|d} instructions
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2014-03-10 16:59:24 -07:00 |
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Andrew Waterman
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c7110c8389
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Make FPU pipeline depths configurable
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2014-02-28 13:39:59 -08:00 |
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Andrew Waterman
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a09ff9fdc7
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Revert to old AUIPC definition
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2014-02-10 19:04:42 -08:00 |
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Andrew Waterman
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1456170c6d
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Always stall decode on RoCC -> FENCE; never stall on RoCC -> deferred AMO.RL fence
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2014-02-06 12:01:49 -08:00 |
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 Yunsup Lee
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ff7cae29f7
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hookup rocc interrupt and s bit
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2014-02-06 00:09:42 -08:00 |
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 Stephen Twigg
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6a02d15c21
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Merge branch 'master' into hwacha-port
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2014-02-04 17:05:03 -08:00 |
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Andrew Waterman
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febd26f505
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Correct CSR privilege logic
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2014-01-31 01:03:17 -08:00 |
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Stephen Twigg
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3c3c469725
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Add exception signal to rocc interface
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2014-01-28 22:13:16 -08:00 |
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Andrew Waterman
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267394d3cc
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Fix CSR interlocks
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2014-01-24 16:37:40 -08:00 |
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Andrew Waterman
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1f986d1c96
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Branches don't care about the ALU input/function
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2014-01-24 16:37:40 -08:00 |
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Andrew Waterman
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a1b7774f5d
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Simplify handling of CAUSE register
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2014-01-24 16:37:39 -08:00 |
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Andrew Waterman
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6ba2c1abe5
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Use auto-generated CAUSE constants
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2014-01-21 15:01:54 -08:00 |
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Andrew Waterman
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57f4d89c90
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Generate D$ replay_next signals correctly
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2014-01-16 00:16:09 -08:00 |
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Andrew Waterman
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31060ea8ae
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Fix fubar long-latency writeback control logic
Load miss writebacks happening at the same time as multiplication
wasn't working. Hopefully this does it.
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2014-01-14 04:02:43 -08:00 |
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Andrew Waterman
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e8486817e6
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Clean up formatting (i.e. remove tabs, semicolons)
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2014-01-13 21:43:56 -08:00 |
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Andrew Waterman
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07a91bb99a
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Miscellaneous cleanup
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2013-12-09 19:53:14 -08:00 |
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Andrew Waterman
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da3135ac9b
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Begin integer unit clean-up
...to make it easier to generate the superscalar version of the core.
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2013-12-09 15:06:13 -08:00 |
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Andrew Waterman
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16d5250924
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Correct FP trap behavior on FCSR
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2013-12-05 04:18:04 -08:00 |
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Andrew Waterman
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924261e2b2
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Update to new privileged ISA... phew
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2013-11-25 04:35:15 -08:00 |
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Andrew Waterman
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65b8340cea
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Mitigate D$ hit -> branch -> NPC critical path
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2013-11-24 14:21:03 -08:00 |
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Stephen Twigg
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3532ae0b79
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From Andrew, actually mark scoreboard when rocc instruction with a writeback is issued. Also, fix an issue with AccumulatorExample not properly tagging its memory requests. Finally, reverted changes from f27429c to more properly follow the spike model (always return previous value of accumulator).
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2013-09-24 10:54:09 -07:00 |
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 Andrew Waterman
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1d2f4f8437
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New ISA encoding, AUIPC semantics
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2013-09-21 06:32:40 -07:00 |
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Andrew Waterman
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f12bbc1e43
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working RoCC AccumulatorExample
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2013-09-14 22:34:53 -07:00 |
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Andrew Waterman
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a0cb711451
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Start adding RoCC
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2013-09-14 15:31:50 -07:00 |
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Andrew Waterman
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d053bdc89f
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Remove Hwacha from Rocket
Soon it will use the coprocessor interface.
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2013-09-12 22:34:38 -07:00 |
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Andrew Waterman
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59f5358435
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Implement AQ/RL; move fence logic out of cache
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2013-09-12 16:07:30 -07:00 |
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Andrew Waterman
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243c4ae342
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sync up rocket with new isa
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2013-09-12 03:44:38 -07:00 |
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Andrew Waterman
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d1b5076fee
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Don't update BTB when garbage was fetched
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2013-08-24 14:44:11 -07:00 |
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Andrew Waterman
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52e31f3298
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Bypass scoreboard updates
This reduces div/mul/D$ miss latency by 1 cycle.
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2013-08-24 14:44:04 -07:00 |
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Andrew Waterman
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d4a0db4575
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Reflect ISA changes
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2013-08-24 14:43:55 -07:00 |
|
 Henry Cook
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3a266cbbfa
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final Reg changes
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2013-08-15 15:28:15 -07:00 |
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Henry Cook
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b570435847
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Reg standardization
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2013-08-13 17:50:02 -07:00 |
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Henry Cook
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1a9e43aa11
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initial attempt at upgrade
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2013-08-12 10:39:11 -07:00 |
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Henry Cook
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9abdf4e154
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Make compatible with scala 2.10. List.sort deprecated. Refactor constants into package object.
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2013-07-23 20:27:58 -07:00 |
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Yunsup Lee
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c837c1d800
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fix bug in previous JALR commit
on commit tag 9a122c06d1bf11237d7fb0769d454a67bbb7400e
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2013-05-21 18:28:44 -07:00 |
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Andrew Waterman
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28f914c3f2
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don't JALR to speculatively-bypassed addresses
Technically not necessary, but probably improves performance.
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2013-05-21 16:56:58 -07:00 |
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Andrew Waterman
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3a1b5f01b2
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don't take interrupts while they're disabled!
a control bug allowed an interrupt to be taken on the instruction immediately
following an interrupt-disabling instruction (but not thereafter).
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2013-05-19 23:27:47 -07:00 |
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Andrew Waterman
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50ccc20bf3
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replace RDNPC with AUIPC
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2013-04-22 04:20:15 -07:00 |
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Andrew Waterman
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8cbdeb2abf
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add LR/SC support
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2013-04-04 17:07:09 -07:00 |
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Andrew Waterman
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fc46daecf6
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don't flush pipeline on writes to side-effect-free PCRs
notably, K0, K1, and EPC
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2013-04-04 17:07:09 -07:00 |
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Andrew Waterman
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d4a3351cfc
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expose pending interrupts in status register
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2013-04-04 17:07:08 -07:00 |
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Andrew Waterman
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575bd3445a
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re-generalize scoreboard
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2013-01-24 18:00:39 -08:00 |
|
 Rimas Avizienis
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63060bc0a8
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minor tweaks for eos18 tapeout (SRAM r/w port ordering, etc)
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2013-01-23 19:27:53 -08:00 |
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 Henry Cook
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e1225c5114
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standardize IO naming convention
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2013-01-07 13:41:36 -08:00 |
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