66da171050
* Add Atom and Literal base classes to CDSL Ast. Change substitution() and copy() on Def/Apply/Rtl to support substituting Var->Union[Var, Literal]. Check in Apply() constructor kinds of passed in Literals respect instruction signature
* Change verify_semantics to check all possible instantiations of enumerated immediates (needed to descrive icmp). Add all bitvector comparison primitives and bvite; Change set_semantics to optionally accept XForms; Add semantics for icmp; Fix typing errors in semantics/{smtlib, elaborate, __init__}.py after the change of VarMap->VarAtomMap
* Forgot macros.py
* Nit obscured by testing with mypy enabled present.
* Typo
46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
"""
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Useful semantics "macro" instructions built on top of
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the primitives.
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"""
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from __future__ import absolute_import
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from cdsl.operands import Operand
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from cdsl.typevar import TypeVar
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from cdsl.instructions import Instruction, InstructionGroup
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from base.types import b1
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from base.immediates import imm64
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from cdsl.ast import Var
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from cdsl.xform import Rtl
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from semantics.primitives import bv_from_imm64, bvite
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import base.formats # noqa
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GROUP = InstructionGroup("primitive_macros", "Semantic macros instruction set")
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AnyBV = TypeVar('AnyBV', bitvecs=True, doc="")
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x = Var('x')
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y = Var('y')
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imm = Var('imm')
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a = Var('a')
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#
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# Bool-to-bv1
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#
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BV1 = TypeVar("BV1", bitvecs=(1, 1), doc="")
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bv1_op = Operand('bv1_op', BV1, doc="")
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cond_op = Operand("cond", b1, doc="")
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bool2bv = Instruction(
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'bool2bv', r"""Convert a b1 value to a 1-bit BV""",
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ins=cond_op, outs=bv1_op)
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v1 = Var('v1')
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v2 = Var('v2')
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bvone = Var('bvone')
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bvzero = Var('bvzero')
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bool2bv.set_semantics(
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v1 << bool2bv(v2),
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Rtl(
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bvone << bv_from_imm64(imm64(1)),
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bvzero << bv_from_imm64(imm64(0)),
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v1 << bvite(v2, bvone, bvzero)
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))
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GROUP.close()
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