公开(公告)号：JPH04227530A

公开(公告)日：1992-08-17

申请号：JP6861591

申请日：1991-04-01

Applicant: ADVANCED MICRO DEVICES INC

Inventor： SUMEETA GUPUTA ,  TOOMASU DABURIYU RINCHI ,  ROBAATO EMU PAARUMAN ,  BURAIAN DEI MATSUKUMIN

IPC: G06F7/00 ,  G06F7/485 ,  G06F7/53 ,  G06F7/57 ,  G06F7/76 ,  G06F9/38

Abstract: PURPOSE: To provide a floating point processing unit making normalization- released input operands which have been given to a multiplication or division unit face the addition/division unit for normalization. CONSTITUTION: A first arithmetic operation unit having a pair of inputs for receiving the first and second operands and output for transmitting the result of an arithmetic operation and a second arithmetic operation unit having the pairs of inputs and outputs are contained. The second arithmetic operation unit includes a normalization releasing unit for releasing the normalization of a normalized number and a normalizing unit for normalizing the number whose normalization is released. The first and second operands are given to the second arithmetic operation unit in which the operand whose normalization is released can be normalized again. The operand which is normalized by the second arithmetic operation unit is given to the first arithmetic operation unit where the arithmetic operation is to be realized.