Elan eSL Series, User Manual

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Chapter 2
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Architecture eSL/eSLS Series (+ eSLZ000) User’s Manual
NOTE
More notes on eSL Series division :
eSL Series hardware can NOT check division overflow and division with zero
divisor. You must preclude these conditions through software manipulation.
The quotient produced by a division with a negative divisor will generally be one
LSB less than the correct result.
The quotient produced by a division is only 16 bits in R0.
Input operands must be of the same type (signed or unsigned) and produce a result
of the same type.
In division, the result of quotient is correct. But, the final result of remainder is
incorrect.
Unsigned divisions can produce erroneous results if the divisor is greater than
0x7FFF. Dividend must be smaller than 0x7ffe8001 (7fff*ffff.).
In signed divisions, the divisor cannot be a negative number (<= 0x7fff). Dividend
must be smaller than 0x3FFF0001 (7fff*7fff).