CAGE User's Guide

Polynomial Ratio, Fixed Point

The advantage of using fixed-point precision is the reduction in computation needed for such numbers. However, it restricts the numbers available to the user.

For example, the polynomial ratio is of the form (see the ratio shown)

To edit the polynomial ratio:

1. Select the Numerator Coefficients edit box and enter the coefficients. In the preceding example, enter 50 0.

1. The number of coefficients determines the order of the polynomial, and the coefficients are ordered from greatest to least.

2. Select the Denominator Coefficients edit box and enter the coefficients. In the preceding example, enter 0 255.
3. Determine the range of values that you want to have in the table. In the preceding example, enter 0 50.

To edit the size of the precision, choose from

• Byte (8 bits)
• Word (16 bits)
• Long (32 bits)
• Custom

Next, determine whether you want the numbers to be signed (negative and positive) or unsigned (nonnegative).

Floating-Point Precision

Lookup Table, Fixed Point