Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Uživatelský manuál stáhnout pdf (Strana 41)

5 INSTRUCTION SET

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

5.9 Arithmetic Operation Instructions

The instruction set of the C33 PE Core supports add/subtract, compare, and multiply instructions for arithmetic

operations. (The multiply instructions are described in the next section.)

add Addition

adc Addition with carry

sub Subtraction

sbc Subtraction with borrow

cmp Comparison

The above arithmetic operations are performed between one general-purpose register and another (R0–R15), or

between a general-purpose register and an immediate. Furthermore, the add and sub instructions can perform

operations between the SP and immediate. Immediates in sizes smaller than word, except for the

cmp instruction,

are zero-extended when operation is performed.

The cmp instruction compares two operands, and may alter a flag, depending on the comparison result. Basically, it

is used to set conditions for conditional jump instructions. If an immediate smaller than word in size is specified as

the source, it is sign-extended when comparison is performed.

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Uživatelský manuál Strana 41