Motorola DSP96002 - Manual (Page 60)

MOTOROLA DSP96002 USER’S MANUAL 5 - 7
e = Biased Exponent .... 11
u = U tag .............. 1
v = V tag .............. 1
i = Integer Part ....... 1
f = Fraction ........... 52
z = Unused bits......... 29
Interpretation of Unused Bits:
Input .................. Don’t Care
Output.................. All Zeros
Unused bits should be written with zero for future compatibility.
Interpretation of Sign:
Positive Mantissa: s = 0
Negative Mantissa: s = 1
Normalized Numbers:
Represents real numbers in the form (-1)
s
x 2
(e-1023)
x 1.f
Bias of e .............. +1023 ($3FF)
e ...................... 0 < e < 2047 ($7FF)
i ...................... 1
f ...................... Zero or Non-Zero
Mantissa................ i.f = 1.f
Denormalized Numbers:
Represents real numbers in the form (-1)
s
x 2
(-1022)
x 0.f
Bias of e .............. +1022 ($3FE)
e ...................... 0 ($000)
i ...................... 0
f ...................... Non-Zero
Mantissa................ i.f = 0.f
Signed Zeros:
Bias of e .............. n.a.
e ...................... 0 ($000)
i ...................... 0
f ...................... Zero
Mantissa................ i.f = 0.00...00
Signed Infinities:
Bias of e .............. n.a.
e ...................... 2047 ($7FF)
i ...................... 1
f ...................... Zero
S
Biased
Exponent
63 62 0
Zero Zero I U V
95 94 93 92 75 74 64 11 10
Fraction