Chapter 7. Expressions

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+

Addition. If either argument is absolute, the result has the section of the other argument.

You may not add together arguments from different sections.

Subtraction. If the right argument is absolute, the result has the section of the left argument.

If both arguments are in the same section, the result is absolute. You may not subtract

arguments from different sections.

==

Is Equal To

Is Not Equal To

Is Less Than

Is Greater Than

=

Is Greater Than Or Equal To

=

Is Less Than Or Equal To

The comparison operators can be used as infix operators. A true results has a value of  1

whereas a false result has a value of 0. Note, these operators perform signed comparisons.

4. Lowest Precedence

&&

Logical And.

||

Logical Or.

These two logical operations can be used to combine the results of sub expressions. Note,

unlike the comparison operators a true result returns a value of 1 but a false results does

still return 0. Also note that the logical or operator has a slightly lower precedence than

logical and.

In short, it's only meaningful to add or subtract the offsets in an address; you can only have a defined

section in one of the two arguments.