公开(公告)号：US20040254970A1

公开(公告)日：2004-12-16

申请号：US10460019

申请日：2003-06-11

Applicant: STMicroelectronics, Inc., Carrollton, Texas

Inventor： Alexander Driker ,  Cristian Duroiu

IPC: G06F007/38

CPC classification number: G06F7/49936

Abstract: A floating point unit, a central processing unit, and a method are provided for adjusting the exponent of a floating point number. During an addition or subtraction of two floating point numbers, the significand of the floating point result is rounded, and the exponent of the result may be adjusted due to normalization or renormalization. The exponent adjustment due to renormalization or the exponent adjustment due to normalization and renormalization is combined with the significand rounding operation.

Abstract translation: 提供浮点单元，中央处理单元和方法来调整浮点数的指数。 在两个浮点数的加法或减法期间，浮点结果的有效数被舍入，结果的指数可能由于归一化或重正化而被调整。 由归一化和重归一化引起的归一化或指数调整引起的指数调整与有效四舍五入操作相结合。

公开(公告)号：US20040254971A1

公开(公告)日：2004-12-16

申请号：US10458946

申请日：2003-06-11

Applicant: STMicroelectronics, Inc.

Inventor： Alexander Driker ,  Cristian Duroiu

IPC: G06F007/38

CPC classification number: G06F7/49952 ,  G06F7/483

Abstract: A method for computing the alignment sticky bit in floating-point operations is provided. The method includes computing a pre-computed sticky bit. A significand is aligned based on an alignment counter. A shifter sticky OR is computed. The alignment sticky bit is computed based on the pre-computed sticky bit by ORing the pre-computed sticky bit and the shifter sticky OR when the alignment counter comprises a value greater than or equal to a predefined value.

Abstract translation: 提供了一种用于计算浮点运算中的对齐粘性位的方法。 该方法包括计算预先计算的粘性位。 基于对齐计数器对齐一个有效数。 计算移位器粘性OR。 当对准计数器包括大于或等于预定值的值时，通过对预先计算的粘性位和移位器粘性OR进行OR运算，基于预计算的粘滞位来计算对准粘性位。