Motorola DSP96002 User Manual page 60

e = Biased Exponent .... 11
95 94 93 92 75 74
S U V Zero
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)
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)
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
MOTOROLA
64 63 62
Biased
I
Exponent
s (e-1023)
x 2
s (-1022)
x 2
DSP96002 USER'S MANUAL
11 10
Fraction Zero
x 1.f
x 0.f
0
5 - 7