HP-UX Floating-Point Guide

Chapter 2 51
Floating-Point Principles and the IEEE Standard for Binary Floating-Point Arithmetic
Floating-Point Formats
Table 2-8 IEEE Double-Precision Value Summary (Hexadecimal Values)
Value Exponent Fraction
Hexadecimal Values (Double-Precision)
Positive Negative
Zero All zeros All zeros 0000 0000 0000 0000 8000 0000 0000 0000
Denormalized All zeros Nonzero 0000 0000 0000 0001
to
000F FFFF FFFF FFFF
8000 0000 0000 0001
to
800F FFFF FFFF FFFF
Normalized Neither
all zeros
nor all
ones
Anything 0010 0000 0000 0000
to
7FEF FFFF FFFF FFFF
8010 0000 0000 0000
to
FFEF FFFF FFFF FFFF
Infinity All ones All zeros 7FF0 0000 0000 0000 FFF0 0000 0000 0000
Quiet NaN All ones Most
significant
bit 0
7FF0 0000 0000 0001
to
7FF7 FFFF FFFF FFFF
FFF0 0000 0000 0001
to
FFF7 FFFF FFFF FFFF
Signaling
NaN
All ones Most
significant
bit 1
7FF8 0000 0000 0000
to
7FFF FFFF FFFF FFFF
FFF8 0000 0000 0000
to
FFFF FFFF FFFF FFFF