D17133CS datasheet(116/289 Pages) NEC

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CHAPTER 11

ARITHMETIC AND LOGIC UNIT

101

11.6.3 "Greater Than or Equal to" Judgement

The "greater than or equal to" judgement instruction (SKGE m, #n4) is used to determine if the contents of a location

in data memory is a value greater than or equal to the value of the immediate data operand. If the value in data memory

is greater than or equal to that of the immediate data, this instruction causes the next instruction to be skipped.

Example

MOV

M1,

#1000B

SKGE

M1,

#0111B

; <1>

;

SKGE

M1,

#1000B

; <2>

;

SKGE

M1,

#1001B

; <3>

In this example, the program will first branch to B since the value in data memory is larger than that

of the immediate data. Next, it will branch to D since the value in data memory is equal to that of

the immediate data. Lastly it will branch to E since the value in data memory is less than that of the

immediate data.

11.6.4 "Less Than" Judgement

The "less than" judgement instruction (SKLT m, #n4) is used to determine if the contents of a location in data

memory is a value less than that of the immediate data operand. If the value in data memory is less than that of

the immediate data, this instruction causes the next instruction to be skipped.

Example

MOV

M1,

#1000B

SKLT

M1,

#1001B

; <1>

;

SKLT

M1,

#1000B

; <2>

;

SKLT

M1,

#0111B

; <3>

In this example, the program will first branch to B since the value in data memory is less than that

of the immediate data. Next, it will branch to C since the value in data memory is equal to that of

the immediate data. Lastly it will branch to E since the value in data memory is greater than that of

the immediate data.

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