发明名称 |
METHOD AND APPARATUS FOR ADDITIVE RANGE REDUCTION |
摘要 |
A method and apparatus for additive range reduction are disclosed. A constant may be pre-stored in a look-up table (LUT), and at least one section of the constant may be retrieved from the LUT for generating a product of an input argument and the constant such that a precision of the product may be controlled in any granularity. For a trigonometric function, 2/&pgr; is stored in the LUT, and at least one section of 2/&pgr; may be retrieved from the LUT. The argument is multiplied with the retrieved sections of 2/&pgr;. The retrieved sections are determined to correctly generate the two least significant bits (LSBs) of an integer portion and a scalable number of most significant bits of the multiplication result. An output of the trigonometric function is generated for the argument with a fractional portion of the multiplication result based on two LSBs of the integer portion of the multiplication result.
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申请公布号 |
US2013060829(A1) |
申请公布日期 |
2013.03.07 |
申请号 |
US201113223974 |
申请日期 |
2011.09.01 |
申请人 |
SPENCER CHRISTOPHER L.;ZOU YUN-XIAO;SUMNER BRIAN L.;ADVANCED MICRO DEVICES, INC. |
发明人 |
SPENCER CHRISTOPHER L.;ZOU YUN-XIAO;SUMNER BRIAN L. |
分类号 |
G06F7/38 |
主分类号 |
G06F7/38 |
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