Boots – shoes – and leggings
Patent
1992-09-23
1994-05-31
Nguyen, Long T.
Boots, shoes, and leggings
G06F 738
Patent
active
053175263
ABSTRACT:
At a format conversion of a floating point number from double-precision to single-precision, a temporary exponent e.sub.1 is obtained by subtracting a double-precision bias B.sub.d from an exponent E of an operand and by adding a single-precision bias B.sub.s thereto. A mantissa M of the operand is shifted to right by a number obtained by adding 1 to an absolute value of the exponent e.sub.1 when e.sub.1 .ltoreq.0. When e.sub.1 >0, the mantissa M is not shifted. the result is rounded to a 23-bit length. When no carry is caused, the rounded value and 0 (when e.sub.1 .ltoreq.0) or e.sub.1 (when e.sub.1 >0) are respectively a mantissa and an exponent to be obtained. The rounded value and e.sub.1 +1 are regarded as a conversion result when e.sub.1 =0 and a carry is caused. A value obtained by shifting the rounded value to right by 1 bit and e.sub.1 +1 are selected when e.sub.1 >0 and a carry is caused. Accordingly, denormalization is executed with a high speed without interrupting a procedure being executed, and conversion results can be always obtained with a minimum number of procedures.
REFERENCES:
patent: 4831575 (1989-05-01), Kuroda
patent: 4949291 (1990-08-01), Saini
Taniguchi Takashi
Urano Miki
Matsushita Electric - Industrial Co., Ltd.
Nguyen Long T.
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