Epson S1C62 Family 4.4.3Operator, 12H, 34H, 00001100B, 00110000B, 00000011B, 11111111B, 00001100B, ■Logical operators, Example: LOW 1234H →, ■Arithmetic operators

CROSS ASSEMBLER ASM62XX

4.4.3Operator

When specifying a value for an item such as an operand, an operational expression can be written instead of a constant, and its result can be used as the value.

Labels and symbols as well as constants can be used as terms in expressions. These values are processed as 13-bit data (bit 14 and subsequent high-order bits are ignored); the operation result also consists of 13 bits. If the result exceeds the number of significant digits of the instruction operand, an error occurs.

There are three types of operator—arithmetic, logical, and relational—as listed below (a and b represent terms, and _ represents one or more blanks).

■Arithmetic operators

There are 11 arithmetic operators including the ones for addition, subtraction, multiplication, division, bit shifting, and bit separation.

+a	Monadic positive (indicates the subsequent value is positive)
-a	Monadic negative (indicates the subsequent value is negative)
a+b	Addition (unsigned)
a-b	Subtraction (unsigned)
a*b	Multiplication (unsigned)
a/b	Division (unsigned)
a_MOD_b	Remainder of a/b
a_SHL_b	Shifts a b bits to the left. ← [b7<<<<<<b1]← 0
	Example: 00000011B SHL 2 →		00001100B
a_SHR_b	Shifts a b bits to the right. 0→ [b7>>>>>>b0]→
	Example: 11000011B SHR 2 →		00110000B
HIGH_a	Separates the high-order eight bits from a (13 bits).
	Example: HIGH 1234H →	12H
LOW_a	Separates the low-order eight bits from a (13 bits).
	Example: LOW 1234H →	34H

■Logical operators

There are four logical operators as listed below. The logical operator returns the result of logical operation on the specified terms.

a_AND_b	Logical product
	Example: 00001111B AND 00000011B →	00000011B
a_OR_b	Logical sum
	Example: 00001111B OR 11110000B →	11111111B
a_XOR_b Exclusive logical sum
	Example: 00001111B XOR 00000011B →	00001100B
NOT_a	Logical negation
	Example: NOT 00001111B → 11110000B

S1C62 FAMILY	EPSON	III-9
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