One vector PR to rule them all

[lekcyjna123]

Here is a PR to merge branch with implementation of vector extension. As for now I am going to merge here all already open PR's related with vector extension.

List of elements:

• AllToAllRoutingNetwork
• OmegaRoutingNetwork
• priority proxy
• MultiportFifo
• VectorRegisterBank
• VRFFragment
• FlexibleAdder
• FlexibleElementwiseFunction

Syntax sugar:

• @loop_def_method
• condition_switch

[lekcyjna123]

Today functional units have been merged to this branch:

• VectorRegisterBank
• VRFFragment
• FlexibleAdder
• FlexibleElementwiseFunction

Additionaly there was added new syntax sugar:

• loop_def_method
• condition_switch

[lekcyjna123]

Today merged to this branch:
New units:

• FifoRS
• VXRS
  Refactor:
• change csr field name to imm2 name
• extend register with register type
  Useful:
• functions to generate instruction data for test input

[lekcyjna123]

Added:

VectorInputVerificator (to check if incoming instruction is correct, or we should raise an exception)
VectorStatus (which handles changes in vector CSRs and add CSR snapshot to each instruction passed through it)
SuperscalarFreeRF (support allocating and deallocating more registers at once)
MultiPriorityEncoder (extension of priority encoder from amaranth to get more outputs in one cycle)
SuperscalarRATs

Other features:

added Now() command to simulation to get current cycle
added special argument _now to get current time in method mock

[lekcyjna123]

Added:

VectorAllocRename
VectorFrontend
VectorMemoryVVRSSpliter
VectorTranslators (main block and EEW, LMUL, RP3, IMM)
VVRS
Scoreboard
Register
RegisterPipe
ShiftRegister
PriorityUniqnessChecker

Rework of vector configuration:

Added VectorUnitConfiguration class
added VectorParameters as field in GenParams

Miscellany:

MethodBrancherIn (syntax sugar for calling methods under different branches of m.If)
NotMethod (to workaround problems with single_caller and SimpleTestCircuit)
MethodMock class (wrapper over TestbenchIO(Adapter())