| 摘要 |
<p>A processor has an exception detector for detecting occurrence of Overflow und Underflow exceptions in floating-point data subjected to a rounding operation, said exception detector comprising first detection means for detecting whether the rounding operation to be executed is a rounding operation by raising or a rounding operation by truncating, means for unconditionally performing the rounding operation by raising on a mantissa part of said floating-point data to provide a modified mantissa part, second detection means for detecting a number of an exponent part of said floating-point data, and third detection means, responsive to detection outputs of said first and second detection means and overflow data of said modified mantissa part, for detecting whether or not Overflow or Underflow exception occurs in said floating-point data subjected to the rounding operation.</p> |
