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Numbers in the single and double formats are composed of the following
three fields:
 1.
 1bit sign s
 2.
 Biased exponent e = E + bias
 3.
 Fraction
The range of the unbiased exponent E shall include every integer
between two values E_{min} and E_{max}, inclusive, and
also two other reserved values E_{min}1 to encode
±0 and
denormalized numbers, and E_{max}+1 to encode and
NaNs. The foregoing parameters are given in Table H.1.
Each nonzero numerical value has just one encoding. The fields are
interpreted as follows:
Table H.1:
Summary of Format Parameters

Format

Parameter 
Single 
Single Extended 
Double 
Double Extended 
p 
24 

53 

E_{max} 
+127 

+1023 

E_{min} 
126 

1022 

Exponent bias 
+127 
unspecified 
+1023 
unspecified 
Exponent width in bits 
8 

11 

Format width in bits 
32 

64 

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5/13/1999