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CROSS ASSEMBLER->Assembler Expressions->Assembler Expressions

Expressions are placed in the operand field and are evaluated by the cross-assembler to give a numerical integer value.  An expression may be used anywhere within the operand field where a numerical value is expected. The expression evaluator within the cross-assembler will use 32 bit integer arithmetic to calculate the value of the expression.

The expression may consist of symbols, numbers, literals and operators. Parentheses may be used to define a particular order of precedence. Parentheses can be nested.

The following operators are allowed:
    

Addition	+
Subtraction	-
Multiplication	*
Integer division	/
Modular division	MOD
Logical OR	OR
Logical AND	AND
Logical exclusive OR	XOR
Complement	NOT
Shift right	SHR
Shift left	SHL
Select high order byte	HIGH
Select low order byte	LOW
Equal	EQ or =
Not equal	NE or <>
Less than	LT or <
Less than or equal to	LE or <=
Greater than	GT or >
Greater than or equal to	GE or >=

These operators take the following precedence:
    
Parenthesized expression ()
HIGH, LOW
*, /, MOD, SHL, SHR
+, -
EQ, NE, LT, LE, GT, GE, =, <>, <, <=, >, >=
NOT
AND
OR, XOR

Operators with the same precedence are evaluated from left to right.