Computational Units
2 – 27
2
S = Sign bit
N = Non-sign bit
D = Don’t care bit
HI Mode HIX Mode
Shifter Array Input Output AV Shifter Array Input Output
1 DDDDDDDD DDDDDDDD +1
SNDDDDDD DDDDDDDD 0 0 SNDDDDDD DDDDDDDD 0
SSNDDDDD DDDDDDDD -1 0 SSNDDDDD DDDDDDDD -1
SSSNDDDD DDDDDDDD -2 0 SSSNDDDD DDDDDDDD -2
SSSSNDDD DDDDDDDD -3 0 SSSSNDDD DDDDDDDD -3
SSSSSNDD DDDDDDDD -4 0 SSSSSNDD DDDDDDDD -4
SSSSSSND DDDDDDDD -5 0 SSSSSSND DDDDDDDD -5
SSSSSSSN DDDDDDDD -6 0 SSSSSSSN DDDDDDDD -6
SSSSSSSS NDDDDDDD -7 0 SSSSSSSS NDDDDDDD -7
SSSSSSSS SNDDDDDD -8 0 SSSSSSSS SNDDDDDD -8
SSSSSSSS SSNDDDDD -9 0 SSSSSSSS SSNDDDDD -9
SSSSSSSS SSSNDDDD -10 0 SSSSSSSS SSSNDDDD -10
SSSSSSSS SSSSNDDD -11 0 SSSSSSSS SSSSNDDD -11
SSSSSSSS SSSSSNDD -12 0 SSSSSSSS SSSSSNDD -12
SSSSSSSS SSSSSSND -13 0 SSSSSSSS SSSSSSND -13
SSSSSSSS SSSSSSSN -14 0 SSSSSSSS SSSSSSSN -14
SSSSSSSS SSSSSSSS -15 0 SSSSSSSS SSSSSSSS -15
LO Mode
SS Shifter Array Input Output
S NDDDDDDD DDDDDDDD -15
S SNDDDDDD DDDDDDDD -16
S SSNDDDDD DDDDDDDD -17
S SSSNDDDD DDDDDDDD -18
S SSSSNDDD DDDDDDDD -19
S SSSSSNDD DDDDDDDD -20
S SSSSSSND DDDDDDDD -21
S SSSSSSSN DDDDDDDD -22
S SSSSSSSS NDDDDDDD -23
S SSSSSSSS SNDDDDDD -24
S SSSSSSSS SSNDDDDD -25
S SSSSSSSS SSSNDDDD -26
S SSSSSSSS SSSSNDDD -27
S SSSSSSSS SSSSSNDD -28
S SSSSSSSS SSSSSSND -29
S SSSSSSSS SSSSSSSN -30
S SSSSSSSS SSSSSSSS -31
Table 2.5 Exponent Detector Characteristics