Module: Idl::Rvalue

Extended by:
T::Helpers, T::Sig
Included in:
ArrayIncludesAst, ArrayLiteralAst, ArraySizeAst, AryElementAccessAst, AryRangeAccessAst, BinaryExpressionAst, BitsCastAst, BuiltinVariableAst, ConcatenationExpressionAst, CsrFieldReadExpressionAst, CsrFunctionCallAst, CsrReadExpressionAst, DontCareLvalueAst, DontCareReturnAst, EnumArrayCastAst, EnumCastAst, EnumElementSizeAst, EnumRefAst, EnumSizeAst, FalseExpressionAst, FieldAccessExpressionAst, FunctionCallExpressionAst, IdAst, IntLiteralAst, ParenExpressionAst, ReplicationExpressionAst, SignCastAst, StringLiteralAst, TernaryOperatorExpressionAst, TrueExpressionAst, UnaryOperatorExpressionAst, WidthRevealAst
Defined in:
lib/idlc/ast.rb

Overview

interface for R-values (e.g., expressions that have a value)

Instance Method Summary collapse

Instance Method Details

#max_value(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 874

def max_value(symtab)
  value_result = T.cast(self, AstNode).value_try do
    return T.cast(T.must(value(symtab)), T.any(Integer, Symbol))
  end
  T.cast(self, AstNode).value_else(value_result) do
    return :unknown
  end
end

#min_value(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 884

def min_value(symtab)
  value_result = T.cast(self, AstNode).value_try do
    return T.cast(T.must(value(symtab)), T.any(Integer, Symbol))
  end
  T.cast(self, AstNode).value_else(value_result) do
    return :unknown
  end
end

#truncate(value, width, signed) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 909

def truncate(value, width, signed)
  masked = value & ((1 << width) - 1)
  if signed
    # signed: need to mask and convert
    if masked[width - 1] == 1
      # twos compliment value is 2^width - value
      -((1 << width) - masked)
    else
      masked
    end
  else
    # unsigned: simple truncation
    masked
  end
end

#type(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 847

def type(symtab); end

#value(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 871

def value(symtab); end

#values(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 906

def values(symtab) = [value(symtab)]