Analog Devices adsp-2100 Manual page 59

If the upper half of the input contains all sign bits, the SE register value is
determined by the second derive exponent operation as shown below.
1. Detect Exponent, Modifier = HI
First Input:
SE set to:
2. Detect Exponent, Modifier = LO
Second Input: 11110110 11010100
SE now set to: -19
3. Normalize, Modifier=HI, No [SR OR], SE = –19 (negated)
First Input:
SR:
All values of SE less than –15 (resulting in a shift of +16 or more) upshift
the input completely off scale.
4. Normalize, Modifier=LO, [SR OR], SE = –19 (negated)
Second Input: 11110110 11010100
SR:
Computational Units
11111111 11111111
-15
11111111 11111111
00000000 00000000 00000000 00000000
10110110 10100 000 00000000 00000000
(Must be upper half)
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