Class: Udb::Condition

Inherits:
AbstractCondition show all
Extended by:
T::Helpers, T::Sig
Defined in:
lib/udb/condition.rb,
lib/udb/condition.rb

Overview

represents a condition in the UDB data, which could include conditions involving extensions and/or parameters

Constant Summary collapse

EvalCallbackType = 
T.type_alias { T.proc.params(term: TermType).returns(SatisfiedResult) }
Xlen32 = 
XlenCondition.new(32)
Xlen64 = 
XlenCondition.new(64)

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractCondition

#always_implies?, #compatible?, #could_be_satisfied_by_cfg_arch?, #covered_by?, #equivalent?, #ext_req_terms, #implies, #mentions?, #mentions_xlen?, #param_terms, #rv32_only?, #rv64_only?, #to_yaml

Constructor Details

#initialize(yaml, cfg_arch, input_file: nil, input_line: nil) ⇒ Condition

Returns a new instance of Condition.



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# File 'lib/udb/condition.rb', line 444

def initialize(yaml, cfg_arch, input_file: nil, input_line: nil)
  @yaml = yaml
  @cfg_arch = cfg_arch
  @input_file = input_file
  @input_line = input_line
  @satisfied_by_cfg_arch_memo = T.let({}, T::Hash[ConfiguredArchitecture, SatisfiedResult])
end

Class Method Details

.conjunction(conditions, cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1524

def self.conjunction(conditions, cfg_arch)
  if conditions.empty?
    AlwaysFalseCondition.new(cfg_arch)
  elsif conditions.size == 1
    conditions.fetch(0)
  else
    Condition.new(
      LogicNode.new(
        LogicNodeType::And,
        conditions.map { |c| c.to_logic_tree_internal }
      ).to_h,
      cfg_arch
    )
  end
end

.disjunction(conditions, cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1548

def self.disjunction(conditions, cfg_arch)
  if conditions.empty?
    AlwaysFalseCondition.new(cfg_arch)
  elsif conditions.size == 1
    conditions.fetch(0)
  else
    Condition.new(
      LogicNode.new(
        LogicNodeType::Or,
        conditions.map { |c| c.to_logic_tree_internal }
      ).to_h,
      cfg_arch
    )
  end
end

.join(cfg_arch, conds) ⇒ Object 



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# File 'lib/udb/condition.rb', line 425

def self.join(cfg_arch, conds)
  if conds.size == 0
    (AlwaysTrueCondition.new(cfg_arch))
  elsif conds.size == 1
    conds.fetch(0)
  else
    Condition.new({ "allOf" => conds.map(&:to_h) }, cfg_arch)
  end
end

.not(condition, cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1595

def self.not(condition, cfg_arch)
  if condition.is_a?(AlwaysFalseCondition)
    AlwaysTrueCondition.new(cfg_arch)
  elsif condition.is_a?(AlwaysTrueCondition)
    AlwaysFalseCondition.new(cfg_arch)
  else
    Condition.new(
      LogicNode.new(
        LogicNodeType::Not,
        [condition.to_logic_tree_internal]
      ).to_h,
      cfg_arch
    )
  end
end

.one_of(conditions, cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1572

def self.one_of(conditions, cfg_arch)
  if conditions.empty?
    AlwaysFalseCondition.new(cfg_arch)
  elsif conditions.size == 1
    conditions.fetch(0)
  else
    Condition.new(
      LogicNode.new(
        LogicNodeType::Xor,
        conditions.map { |c| c.to_logic_tree_internal }
      ).to_h,
      cfg_arch
    )
  end
end

.solver ⇒ Object 



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# File 'lib/udb/condition.rb', line 715

def self.solver
  @solver ||= Z3Solver.new
end

.solver_for_arch(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 896

def self.solver_for_arch(cfg_arch)
  return @arch_solvers.fetch(cfg_arch) if @arch_solvers&.key?(cfg_arch)

  @arch_solvers ||= {}

  tree = cfg_arch.arch_condition.to_logic_tree(expand: false)
  s = solver_for(tree, cfg_arch, "arch")

  @arch_solvers[cfg_arch] = s
end

.solver_for_cfg_arch(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 864

def self.solver_for_cfg_arch(cfg_arch)
  return @cfg_arch_solvers[cfg_arch] if @cfg_arch_solvers&.key?(cfg_arch)

  @cfg_arch_solvers ||= {}

  tree = cfg_arch.to_condition.to_logic_tree(expand: false)
  s = solver_for(tree, cfg_arch, "cfg_arch")

  @cfg_arch_solvers[cfg_arch] = s
end

Instance Method Details

#&(other) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1613

def &(other)
  Condition.conjunction([self, other], @cfg_arch)
end

#-@ ⇒ Object 



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# File 'lib/udb/condition.rb', line 1623

def -@
  Condition.not(self, @cfg_arch)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 453

def empty? = @yaml == true || @yaml == false || @yaml.empty?

#expand_term_requirements(tree, expansion_clauses = [], touched_terms = T.let(Set.new, T::Set[TermType])) ⇒ Object 



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# File 'lib/udb/condition.rb', line 646

def expand_term_requirements(tree, expansion_clauses = [], touched_terms = T.let(Set.new, T::Set[TermType]))
  terms = tree.terms

  terms.each do |term|
    case term
    when ExtensionTerm
      expand_extension_term_requirements(term, expansion_clauses, touched_terms)
    when ParameterTerm
      expand_parameter_term_requirements(term, expansion_clauses, touched_terms)
    else
      #pass
    end
  end

  expansion_clauses
end

#expand_to_enforce_single_ext_ver(tree, expansion_clauses) ⇒ Object 



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# File 'lib/udb/condition.rb', line 545

def expand_to_enforce_single_ext_ver(tree, expansion_clauses)
  # for every mentioned extension, enforce that either zero or one version is ever implemented
  mentioned_ext_terms = (tree.terms.grep(ExtensionTerm) + expansion_clauses.map { |c| c.terms.grep(ExtensionTerm) }.flatten).uniq

  grouped_ext_terms = mentioned_ext_terms.group_by(&:name)

  grouped_ext_terms.each do |ext_name, ext_terms|
    # assuming this comes after expand_extension_version_ranges, so we can ignore ranges
    mentioned_versions = ext_terms.select { |e| e.comparison == ExtensionTerm::ComparisonOp::Equal }
    if mentioned_versions.size > 1
      # add NONE(ext_terms) || XOR(ext_terms)
      expansion_clauses <<
        LogicNode.new(
          LogicNodeType::Or,
          [
            LogicNode.new(
              LogicNodeType::None,
              mentioned_versions.map { |t| LogicNode.new(LogicNodeType::Term, [t]) }
            ),
            LogicNode.new(
              LogicNodeType::Xor,
              mentioned_versions.map { |t| LogicNode.new(LogicNodeType::Term, [t]) }
            )
          ]
        )
    end
  end
end

#failing_conjuncts(cfg_arch, expand: false) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1297

def failing_conjuncts(cfg_arch, expand: false)
  cb = LogicNode.make_eval_cb do |term|
    case term
    when ExtensionTerm
      if cfg_arch.fully_configured?
        ext_ver = cfg_arch.implemented_extension_version(term.name)
        if ext_ver.nil? || !term.to_ext_req(cfg_arch).satisfied_by?(ext_ver)
          SatisfiedResult::No
        else
          SatisfiedResult::Yes
        end
      elsif cfg_arch.partially_configured?
        ext_req = term.to_ext_req(cfg_arch)
        if cfg_arch.mandatory_extension_reqs.any? { |cfg_ext_req| ext_req.satisfied_by?(cfg_ext_req) }
          SatisfiedResult::Yes
        elsif (cfg_arch.possible_extension_versions_by_name[term.name] || []).any? { |cfg_ext_ver| ext_req.satisfied_by?(cfg_ext_ver) }
          SatisfiedResult::Maybe
        else
          SatisfiedResult::No
        end
      else
        SatisfiedResult::Maybe
      end
    when ParameterTerm
      if cfg_arch.fully_configured?
        if cfg_arch.param_values.key?(term.name)
          term.eval(cfg_arch)
        else
          SatisfiedResult::No
        end
      elsif cfg_arch.partially_configured?
        term.eval(cfg_arch)
      else
        SatisfiedResult::Maybe
      end
    when XlenTerm
      if cfg_arch.possible_xlens.include?(term.xlen)
        if cfg_arch.possible_xlens.size == 1
          SatisfiedResult::Yes
        else
          SatisfiedResult::Maybe
        end
      else
        SatisfiedResult::No
      end
    else
      raise "unexpected term type #{term.class.name}"
    end
  end
  to_logic_tree(expand:).failing_conjuncts(cb).map do |node|
    node.to_s_with_value(cb, format: LogicNode::LogicSymbolFormat::C)
  end
end

#has_extension_requirement? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 1008

def has_extension_requirement?
  to_logic_tree(expand: true).terms.any? { |t| t.is_a?(ExtensionVersion) }
end

#has_param? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 1003

def has_param?
  to_logic_tree(expand: true).terms.any? { |t| t.is_a?(ParameterTerm) }
end

#implied_extension_conflicts(expand: true) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1431

def implied_extension_conflicts(expand: true)
  # strategy:
  #   1. invert extension requiremnts (to get conflicts)
  #   1. convert to product-of-sums.
  #   2. for each product, find the positive terms. These are the conflicts
  #   3. for each product, find the negative terms. These are the "conditions" when the positive terms apply

  @conflicts ||= begin
    conflicts = T.let([], T::Array[ConditionalExtensionRequirement])
    pos = LogicNode.new(LogicNodeType::Not, [to_logic_tree(expand:)]).minimize(LogicNode::CanonicalizationType::ProductOfSums)
    if pos.type == LogicNodeType::Term
      # there are no negative terms, do nothing
    elsif pos.type == LogicNodeType::Not
      single_term = pos.node_children.fetch(0).children.fetch(0)
      if single_term.is_a?(ExtensionTerm)
        conflicts << \
          ConditionalExtensionRequirement.new(
            ext_req: single_term.to_ext_req(@cfg_arch),
            cond: AlwaysTrueCondition.new(@cfg_arch)
          )
      else
        # parameter, do nothing
      end
    elsif pos.type == LogicNodeType::And
      pos.children.each do |child|
        child = T.cast(child, LogicNode)
        if child.type == LogicNodeType::Term
          # not a negative term; do nothing
        elsif child.type == LogicNodeType::Not
          term = child.node_children.fetch(0).children.fetch(0)
          if term.is_a?(ExtensionTerm)
            conflicts << \
              ConditionalExtensionRequirement.new(
                ext_req: term.to_ext_req(@cfg_arch),
                cond: (AlwaysTrueCondition.new(@cfg_arch))
              )
          else
            puts "Not a term: #{term} #{term.class.name}"
          end
        elsif child.children.all? { |child| T.cast(child, LogicNode).type == LogicNodeType::Term }
          # there is no negative term, so do nothing
        else
          raise "? #{child.type}" unless child.type == LogicNodeType::Or

          negative_terms =
            child.node_children.select do |and_child|
              and_child.type == LogicNodeType::Not && and_child.node_children.fetch(0).children.fetch(0).is_a?(ExtensionTerm)
            end.map { |n| n.node_children.fetch(0) }
          cond_terms =
            child.node_children.select { |and_child| and_child.type == LogicNodeType::Term }
          negative_terms.each do |nterm|
            cond_node =
              if cond_terms.empty?
                LogicNode::True
              else
                cond_terms.size == 1 \
                    ? cond_terms.fetch(0)
                    : LogicNode.new(LogicNodeType::Or, cond_terms)
              end

            conflicts << \
              ConditionalExtensionRequirement.new(
                ext_req: T.cast(nterm.children.fetch(0), ExtensionTerm).to_ext_req(@cfg_arch),
                cond: Condition.new(cond_node.to_h, @cfg_arch)
              )
          end
          conflicts
        end
      end
    end
    conflicts
  end
end

#implied_extension_requirements(expand: true) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1357

def implied_extension_requirements(expand: true)
  # strategy:
  #   1. convert to sum-of-products.
  #   2. for each product, find the positive terms. These are the implications
  #   3. for each product, find the negative terms. These are the "conditions" when the positive terms apply

  @implications ||= begin
    reqs = T.let([], T::Array[ConditionalExtensionRequirement])
    pos = to_logic_tree(expand:).minimize(LogicNode::CanonicalizationType::ProductOfSums)

    if pos.type == LogicNodeType::Term
      single_term = pos.children.fetch(0)
      if single_term.is_a?(ExtensionTerm)
        reqs << ConditionalExtensionRequirement.new(ext_req: single_term.to_ext_req(@cfg_arch), cond: AlwaysTrueCondition.new(@cfg_arch))
      else
        # this is a single parameter, do nothing
      end
    elsif pos.type == LogicNodeType::Not
      # there are no positive terms, do nothing
    elsif pos.type == LogicNodeType::And
      pos.children.each do |child|
        child = T.cast(child, LogicNode)
        if child.type == LogicNodeType::Term
          term = child.children.fetch(0)
          if term.is_a?(ExtensionTerm)
            reqs << \
              ConditionalExtensionRequirement.new(
                ext_req: term.to_ext_req(@cfg_arch),
                cond: AlwaysTrueCondition.new(@cfg_arch)
              )
          end
        elsif child.type == LogicNodeType::Not
          # not a positive term; do nothing
        elsif child.children.all? { |child| T.cast(child, LogicNode).type == LogicNodeType::Not }
          # there is no positive term, so do nothing
        else
          raise "? #{child.type}" unless child.type == LogicNodeType::Or

          positive_terms =
            child.node_children.select do |and_child|
              and_child.type == LogicNodeType::Term && and_child.children.fetch(0).is_a?(ExtensionTerm)
            end
          cond_terms =
            child.node_children.select { |and_child| and_child.type == LogicNodeType::Not }
            .map { |neg_term| neg_term.node_children.fetch(0) }
          cond_terms +=
            child.node_children.select do |and_child|
              and_child.type == LogicNodeType::Term && and_child.children.fetch(0).is_a?(ParameterTerm)
            end.map { |c| LogicNode.new(LogicNodeType::Not, [c]) }
          positive_terms.each do |pterm|
            cond_node =
              if cond_terms.empty?
                LogicNode::True
              else
                cond_terms.size == 1 \
                    ? cond_terms.fetch(0)
                    : LogicNode.new(LogicNodeType::And, cond_terms)
              end

            reqs << \
              ConditionalExtensionRequirement.new(
                ext_req: T.cast(pterm.children.fetch(0), ExtensionTerm).to_ext_req(@cfg_arch),
                cond: Condition.new(cond_node.to_h, @cfg_arch)
              )
          end
          reqs
        end
      end
    end
    reqs
  end
end

#make_cb_proc(&blk) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1015

def make_cb_proc(&blk)
  blk
end

#minimize(expand: true) ⇒ Object 



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# File 'lib/udb/condition.rb', line 940

def minimize(expand: true)
  Condition.new(to_logic_tree(expand:).minimize(LogicNode::CanonicalizationType::ProductOfSums).to_h, @cfg_arch)
end

#partial_eval(ext_reqs: [], expand: true) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1205

def partial_eval(ext_reqs: [], expand: true)
  cb = LogicNode.make_replace_cb do |node|
    if node.type == LogicNodeType::Term
      term = node.children.fetch(0)
      if term.is_a?(ExtensionTerm)
        term_ext_req = term.to_ext_req(@cfg_arch)
        if ext_reqs.any? { |ext_req| term_ext_req.satisfied_by?(ext_req) }
          next LogicNode::True
        end
      end
    end
    node
  end
  LogicCondition.new(to_logic_tree(expand:).replace_terms(cb), @cfg_arch)
end

#partially_evaluate_for_params(cfg_arch, expand:) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1021

def partially_evaluate_for_params(cfg_arch, expand:)
  cb = make_cb_proc do |term|
    if term.is_a?(ExtensionTerm)
      SatisfiedResult::Maybe
    elsif term.is_a?(ParameterTerm)
      term.partial_eval(cfg_arch.config.param_values)
    elsif term.is_a?(FreeTerm)
      raise "unreachable"
    elsif term.is_a?(XlenTerm)
      # can't use cfg_arch.possible_xlens because of an initialization circular dependency in figuring out
      # is S/U is implemented
      if term.xlen == 32
        if cfg_arch.mxlen.nil?
          SatisfiedResult::Maybe
        elsif cfg_arch.mxlen == 32
          SatisfiedResult::Yes
        else
          # mxlen == 64. can some other mode be 32?
          if !cfg_arch.config.param_values.key?("SXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("SXLEN"), T::Array[Integer]).include?(32)
            SatisfiedResult::Yes
          elsif !cfg_arch.config.param_values.key?("UXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("UXLEN"), T::Array[Integer]).include?(32)
            SatisfiedResult::Yes
          elsif !cfg_arch.config.param_values.key?("VSXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("VSXLEN"), T::Array[Integer]).include?(32)
            SatisfiedResult::Yes
          elsif !cfg_arch.config.param_values.key?("VUXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("VUXLEN"), T::Array[Integer]).include?(32)
            SatisfiedResult::Yes
          else
            SatisfiedResult::No
          end
        end
      elsif term.xlen == 64
        if cfg_arch.mxlen.nil?
          SatisfiedResult::Maybe
        elsif cfg_arch.mxlen == 32
          SatisfiedResult::No
        else
          # mxlen == 64. can some other mode be 32?
          if !cfg_arch.config.param_values.key?("SXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("SXLEN"), T::Array[Integer]) == [32]
            SatisfiedResult::Maybe
          elsif !cfg_arch.config.param_values.key?("UXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("UXLEN"), T::Array[Integer]) == [32]
            SatisfiedResult::Maybe
          elsif !cfg_arch.config.param_values.key?("VSXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("VSXLEN"), T::Array[Integer]) == [32]
            SatisfiedResult::Maybe
          elsif !cfg_arch.config.param_values.key?("VUXLEN")
            SatisfiedResult::Maybe
          elsif T.cast(cfg_arch.config.param_values.fetch("VUXLEN"), T::Array[Integer]) == [32]
            SatisfiedResult::Maybe
          else
            SatisfiedResult::Yes
          end
        end
      else
        raise "term.xlen is not 32 or 64"
      end
    else
      T.absurd(term)
    end
  end

  Condition.new(
    to_logic_tree(expand:).partial_evaluate(cb).to_h,
    cfg_arch
  )
end

#sat_arch_model(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 841

def sat_arch_model(cfg_arch)
  s = Condition.solver_for_arch(cfg_arch)
  s.push
  tree = to_logic_tree(expand: false)
  if tree.type == LogicNodeType::And
    tree.node_children.each do |child|
      s.assert_as child.to_z3(cfg_arch, s), child.to_s
    end
  else
    s.assert_as tree.to_z3(cfg_arch, s), tree.to_s
  end
  result = s.satisfiable?
  if result
    m = s.model
    s.pop
    m
  else
    s.pop
    nil
  end
end

#satisfiability_depends_on_ext_req?(ext_req, include_requirements: false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 1196

def satisfiability_depends_on_ext_req?(ext_req, include_requirements: false)
  if include_requirements
    (self & -ext_req.to_condition & -ext_req.requirements_condition).satisfiable? == false
  else
    (self & -ext_req.to_condition).satisfiable? == false
  end
end

#satisfiable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 929

def satisfiable?
  solver { |s| s.satisfiable? }
end

#satisfiable_by_arch?(cfg_arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 908

def satisfiable_by_arch?(cfg_arch)
  s = Condition.solver_for_arch(cfg_arch)
  s.push
  s.assert to_logic_tree(expand: false).to_z3(cfg_arch, s)
  result = s.satisfiable?
  s.pop
  result
end

#satisfiable_by_cfg_arch?(cfg_arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 876

def satisfiable_by_cfg_arch?(cfg_arch)
  s = Condition.solver_for_cfg_arch(cfg_arch)
  s.push
  s.assert to_logic_tree(expand: false).to_z3(@cfg_arch, s)
  result = s.satisfiable?
  s.pop
  result
end

#satisfied_by_cfg_arch?(cfg_arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 1101

def satisfied_by_cfg_arch?(cfg_arch)
  @satisfied_by_cfg_arch_memo[cfg_arch] ||=
    if cfg_arch.fully_configured?
      implemented_ext_cb = make_cb_proc do |term|
        if term.is_a?(ExtensionTerm)
          ext_ver = cfg_arch.implemented_extension_version(term.name)
          next SatisfiedResult::No if ext_ver.nil?
          term.to_ext_req(cfg_arch).satisfied_by?(ext_ver) \
            ? SatisfiedResult::Yes
            : SatisfiedResult::No
        elsif term.is_a?(ParameterTerm)
          if cfg_arch.param_values.key?(term.name)
            result = term.eval(cfg_arch)
            result = resolve_param_term_from_maybe(term, cfg_arch) if result == SatisfiedResult::Maybe
            result
          else
            SatisfiedResult::No
          end
        elsif term.is_a?(FreeTerm)
          raise "unreachable"
        elsif term.is_a?(XlenTerm)
          if cfg_arch.possible_xlens.include?(term.xlen)
            if cfg_arch.possible_xlens.size == 1
              SatisfiedResult::Yes
            else
              SatisfiedResult::Maybe
            end
          else
            SatisfiedResult::No
          end
        else
          T.absurd(term)
        end
      end
      if to_logic_tree(expand: false).eval_cb(implemented_ext_cb) == SatisfiedResult::Yes
        SatisfiedResult::Yes
      else
        SatisfiedResult::No
      end
    elsif cfg_arch.partially_configured?
      cb = make_cb_proc do |term|
        if term.is_a?(ExtensionTerm)
          ext_req = term.to_ext_req(cfg_arch)
          if cfg_arch.mandatory_extension_reqs.any? { |cfg_ext_req| ext_req.satisfied_by?(cfg_ext_req) }
            SatisfiedResult::Yes
          elsif (cfg_arch.possible_extension_versions_by_name[term.name] || []).any? { |cfg_ext_ver| ext_req.satisfied_by?(cfg_ext_ver) }
            SatisfiedResult::Maybe
          else
            SatisfiedResult::No
          end
        elsif term.is_a?(ParameterTerm)
          result = term.eval(cfg_arch)
          result = resolve_param_term_from_maybe(term, cfg_arch) if result == SatisfiedResult::Maybe
          result
        elsif term.is_a?(FreeTerm)
          raise "unreachable"
        elsif term.is_a?(XlenTerm)
          if cfg_arch.possible_xlens.include?(term.xlen)
            if cfg_arch.possible_xlens.size == 1
              SatisfiedResult::Yes
            else
              SatisfiedResult::Maybe
            end
          else
            SatisfiedResult::No
          end
        else
          T.absurd(term)
        end
      end

      to_logic_tree(expand: false).eval_cb(cb)
    else
      # unconfig. Can't really say anthing
      SatisfiedResult::Maybe
    end
end

#satisfied_by_ext_req?(ext_req, include_requirements: false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 1180

def satisfied_by_ext_req?(ext_req, include_requirements: false)
  cb = make_cb_proc do |term|
    if term.is_a?(ExtensionTerm)
      if term.to_ext_req(@cfg_arch).satisfied_by?(ext_req)
        SatisfiedResult::Yes
      else
        SatisfiedResult::No
      end
    else
      SatisfiedResult::No
    end
  end
  ext_req.to_condition.to_logic_tree(expand: include_requirements).eval_cb(cb) == SatisfiedResult::Yes
end

#solver(&blk) ⇒ Object 



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# File 'lib/udb/condition.rb', line 724

def solver(&blk)
  s = Condition.solver
  s.push
  s.assert to_logic_tree(expand: false).to_z3(@cfg_arch, s)
  expansion_clauses = expand_term_requirements(to_logic_tree(expand: false))
  expansion_clauses.each do |clause|
    s.assert clause.to_z3(@cfg_arch, s)
  end
  # puts "-----------------------"
  # puts s.assertions
  # puts "^^^^^^^^^^^^^^^^^^^^^^"

  ret = yield s

  s.pop

  ret
end

#to_asciidoc ⇒ Object 



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# File 'lib/udb/condition.rb', line 1352

def to_asciidoc
  to_logic_tree(expand: false).to_asciidoc(include_versions: false)
end

#to_expanded_logic_tree_shallow ⇒ Object 



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# File 'lib/udb/condition.rb', line 663

def to_expanded_logic_tree_shallow
  @expanded_logic_tree_shallow ||=
    begin
      starting_tree = to_logic_tree_internal

      expansion_clauses = expand_term_requirements(starting_tree)

      if expansion_clauses.empty?
        starting_tree
      else
        LogicNode.new(LogicNodeType::And, [starting_tree] + expansion_clauses)
      end
    end
end

#to_h ⇒ Object 



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# File 'lib/udb/condition.rb', line 1222

def to_h
  to_logic_tree(expand: false).to_h
end

#to_idl(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1227

def to_idl(cfg_arch)
  idl = to_logic_tree(expand: false).to_idl(cfg_arch)
  "-> #{idl};"
end

#to_logic_tree(expand:) ⇒ Object 



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# File 'lib/udb/condition.rb', line 679

def to_logic_tree(expand:)
  if expand
    @logic_tree_expanded ||=
      begin
        # we do several things in expansion:
        #
        #  1. expand any requirements of extensions/parameters
        #  2. ensure XLEN is exclusive (can be 32 or 64, but not both)
        #  3. ensure zero or one version of an extension can be implemented
        starting_tree = to_logic_tree_internal

        expansion_clauses = expand_term_requirements(starting_tree)

        expand_extension_version_ranges(starting_tree, expansion_clauses)

        # enforce_single_ext_ver must come after expand_extension_version_ranges
        expand_to_enforce_single_ext_ver(starting_tree, expansion_clauses)

        expand_to_enforce_param_relations(starting_tree, expansion_clauses)

        expand_xlen(starting_tree, expansion_clauses)

        expanded_tree =
          if expansion_clauses.empty?
            starting_tree
          else
            LogicNode.new(LogicNodeType::And, [starting_tree] + expansion_clauses)
          end

        expanded_tree
      end
  else
    @logic_tree_unexpanded ||= to_logic_tree_helper(@yaml)
  end
end

#to_logic_tree_internal ⇒ Object 



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# File 'lib/udb/condition.rb', line 949

def to_logic_tree_internal
  to_logic_tree_helper(@yaml)
end

#to_s(expand: false) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1233

def to_s(expand: false)
  to_logic_tree(expand:).to_s(format: LogicNode::LogicSymbolFormat::C)
end

#to_s_pretty ⇒ Object 



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# File 'lib/udb/condition.rb', line 1239

def to_s_pretty
  to_logic_tree(expand: false).to_s_pretty
end

#to_s_with_value(cfg_arch, expand: false) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1244

def to_s_with_value(cfg_arch, expand: false)
  cb = LogicNode.make_eval_cb do |term|
    case term
    when ExtensionTerm
      if cfg_arch.fully_configured?
        ext_ver = cfg_arch.implemented_extension_version(term.name)
        if ext_ver.nil? || !term.to_ext_req(cfg_arch).satisfied_by?(ext_ver)
          SatisfiedResult::No
        else
          SatisfiedResult::Yes
        end
      elsif cfg_arch.partially_configured?
        ext_req = term.to_ext_req(cfg_arch)
        if cfg_arch.mandatory_extension_reqs.any? { |cfg_ext_req| ext_req.satisfied_by?(cfg_ext_req) }
          SatisfiedResult::Yes
        elsif (cfg_arch.possible_extension_versions_by_name[term.name] || []).any? { |cfg_ext_ver| ext_req.satisfied_by?(cfg_ext_ver) }
          SatisfiedResult::Maybe
        else
          SatisfiedResult::No
        end
      else
        SatisfiedResult::Maybe
      end
    when ParameterTerm
      if cfg_arch.fully_configured?
        if cfg_arch.param_values.key?(term.name)
          term.eval(cfg_arch)
        else
          SatisfiedResult::No
        end
      elsif cfg_arch.partially_configured?
        term.eval(cfg_arch)
      else
        SatisfiedResult::Maybe
      end
    when XlenTerm
      if cfg_arch.possible_xlens.include?(term.xlen)
        if cfg_arch.possible_xlens.size == 1
          SatisfiedResult::Yes
        else
          SatisfiedResult::Maybe
        end
      else
        SatisfiedResult::No
      end
    else
      raise "unexpected term type #{term.class.name}"
    end
  end
  to_logic_tree(expand:).to_s_with_value(cb, format: LogicNode::LogicSymbolFormat::C)
end

#unsat_arch_core(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 805

def unsat_arch_core(cfg_arch)
  s = Condition.solver_for_arch(cfg_arch)
  s.push
  tree = to_logic_tree(expand: false)
  if tree.type == LogicNodeType::And
    tree.node_children.each do |child|
      s.assert_as child.to_z3(cfg_arch, s), child.to_s
    end
  else
    s.assert_as tree.to_z3(cfg_arch, s), tree.to_s
  end
  result = s.unsatisfiable?
  if result
    core = Z3::LowLevel.solver_get_unsat_core(s.solver)
    s.pop
    return Z3::LowLevel.unpack_ast_vector(core)
  end
  raise "Cond is not unsatisfiable"
end

#unsatisfiable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 935

def unsatisfiable?
  solver { |s| s.unsatisfiable? }
end

#unsatisfiable_by_arch?(cfg_arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 918

def unsatisfiable_by_arch?(cfg_arch)
  s = Condition.solver_for_arch(cfg_arch)
  s.push
  s.assert to_logic_tree(expand: false).to_z3(cfg_arch, s)
  result = s.unsatisfiable?
  s.pop
  result
end

#unsatisfiable_by_cfg_arch?(cfg_arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/udb/condition.rb', line 886

def unsatisfiable_by_cfg_arch?(cfg_arch)
  s = Condition.solver_for_cfg_arch(cfg_arch)
  s.push
  s.assert to_logic_tree(expand: false).to_z3(@cfg_arch, s)
  result = s.unsatisfiable?
  s.pop
  result
end

#z3_assertions(cfg_arch) ⇒ Object 



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# File 'lib/udb/condition.rb', line 825

def z3_assertions(cfg_arch)
  s = Condition.solver_for_arch(cfg_arch)
  s.push
  tree = to_logic_tree(expand: false)
  if tree.type == LogicNodeType::And
    tree.node_children.each do |child|
      s.assert_as child.to_z3(cfg_arch, s), child.to_s
    end
  else
    s.assert_as tree.to_z3(cfg_arch, s), tree.to_s
  end
  assertions = s.assertions
  s.pop
  assertions
end

#|(other) ⇒ Object 



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# File 'lib/udb/condition.rb', line 1618

def |(other)
  Condition.disjunction([self, other], @cfg_arch)
end