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power-fv/power_fv/check/insn/cr.py

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In-depth refactoring, improved user interface. * A PowerFVSession class provides a REPL interface. Functionality is split into commands (e.g. add checks, build) which can be provided interactively or from a file. See cores/microwatt for an example of its integration. * Instruction specifications are now separated from verification testbenches. An InsnSpec class provides a behavioral model using the same PowerFV interface as a core. This interface is output-only for a core, but bidirectional for the InsnSpec: - fields related to context (e.g. read data) are inputs, - fields related to side-effects (e.g. write strobes) are outputs. The testbench is responsible for driving inputs to the same values as the core, then check outputs for equivalence. This decoupling provides a path towards using PowerFV in simulation. * Instruction encodings are now defined by their fields, not their format (which was problematic e.g. X-form has dozens of variants). Field declarations can be preset to a value, or left undefined. In the latter case, they are implicitly cast to AnyConst (which is useful for arbitrary values like immediates).
2 years ago
from power_fv.insn import const
from power_fv.insn.spec.cr import CRSpec
from power_fv.check.insn import InsnCheck
__all__ = [
"CRAND", "CROR", "CRNAND", "CRXOR", "CRNOR", "CRANDC", "CREQV", "CRORC",
"MCRF" ,
]
class CRAND (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRAND ): pass
class CROR (InsnCheck, spec_cls=CRSpec, insn_cls=const.CROR ): pass
class CRNAND (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRNAND): pass
class CRXOR (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRXOR ): pass
class CRNOR (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRNOR ): pass
class CRANDC (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRANDC): pass
class CREQV (InsnCheck, spec_cls=CRSpec, insn_cls=const.CREQV ): pass
class CRORC (InsnCheck, spec_cls=CRSpec, insn_cls=const.CRORC ): pass
class MCRF (InsnCheck, spec_cls=CRSpec, insn_cls=const.MCRF ): pass