D17133CS datasheet(115/289 Pages) NEC

115 / 289 page

CHAPTER 11

ARITHMETIC AND LOGIC UNIT

100

11.6.1 "Equal to" Judgement

The "equal to" judgement instruction (SKE m, #n4) is used to determine if immediate data and the contents of

a location in data memory are equal.

This instruction causes the next instruction to be skipped when the immediate data and the contents of data

memory are equal.

Example

MOV

M1,

#1010B

SKE

M1,

#1010B

; <1>

;

SKE

M1,

#1000B

; <2>

In this example, because the contents of data memory M1 and immediate data 1010B in step number

<1> are equal, the program branches to B. In step number <2>, because the contents of data memory

M1 and immediate data 1000B are not equal, the program branches to C.

11.6.2 "Not Equal to" Judgement

The "not equal to" judgement instruction (SKNE m, #n4) is used to determine if immediate data and the contents

of a location in data memory are not equal.

This instruction causes the next instruction to be skipped when the immediate data and the contents of data

memory are not equal.

Example

MOV

M1,

#1010B

SKNE

M1,

#1000B

; <1>

;

SKNE

M1,

#1010B

; <2>

In this example, because the contents of data memory M1 and immediate data 1000B in step number

<1> are not equal, the program branches to B. In step number <2>, because the contents of data

memory M1 and immediate data 1010B are equal, the program branches to C.

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