22.10.4 Notes on Operation Results

Overflowing Digits

Overflowing digits resulting from operations are truncated.

16-bit, undefined type, and unsigned

• 65535 + 1 = 0 (Produces overflowing digits)

• (65534 * 2) / 2 = 32766 (Produces overflowing digits)

• (65534 / 2) * 2 = 65534 (No overflowing digits)

Difference in Residual Processing

The result of residual processing depends on whether the left and right sides are signed or unsigned.

• -9 % 5 = -4

• 9 % -5 = 4

Truncated Decimal Places

Fractional values resulting from division are truncated.

• 10 / 3 * 3 = 9

• 10 * 3 / 3 = 10

Notes on Operating BCD Data

A BCD-data operation which produces overflowing digits does not give the correct result.