參數(shù)資料
型號: intel i387
廠商: Intel Corp.
英文描述: Military I387 Math Coprocessor(軍用I387數(shù)學協(xié)處理器)
中文描述: 軍事I387數(shù)學協(xié)處理器(軍用I387數(shù)學協(xié)處理器)
文件頁數(shù): 6/41頁
文件大小: 457K
代理商: INTEL I387
MILITARY i387
TM
MATH COPROCESSOR
Table 2.1. i387
TM
NPX Data Type Representation in Memory
271074–2
NOTES:
(1) S
e
Sign bit (0
e
positive, 1
e
negative)
(2) d
n
e
Decimal digit (two per byte)
(3) X
e
Bits have no significance; i387 NPX ignores when loading, zeros when storing
(4)
U
e
Position of implicit binary point
(5) I
e
Integer bit of significand; stored in temporary real, implicit in single and double precision
(6) Exponent Bias (normalized values):
Single: 127 (7FH)
Double: 1023 (3FFH)
Extended Real: 16383 (3FFFH)
(7) Packed BCD: (
1)
S
(D
17
...D
0
)
(8) Real: (
b
1)
S
(2
E-BIAS
) (F
0
F
1
...)
6
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