S3F80JB

INSTRUCTION SET

 

 

BAND — Bit AND

BAND dst,src.b

BAND dst.b,src

Operation: dst(0) dst(0) AND src(b) or

dst(b) dst(b) AND src(0)

The specified bit of the source (or the destination) is logically ANDed with the zero bit (LSB) of the destination (or source). The resultant bit is stored in the specified bit of the destination. No other bits of the destination are affected. The source is unaffected.

Flags:

C:

Unaffected.

 

Z:

Set if the result is "0"; cleared otherwise.

 

S:

Cleared to "0".

 

V:

Undefined.

D: Unaffected.

H: Unaffected.

Format:

Bytes Cycles Opcode

Addr Mode

(Hex)

dst src

opc

dst b 0

src

3

6

67

r0

Rb

opc

src b 1

dst

3

6

67

Rb

r0

NOTE: In the second byte of the 3-byte instruction formats, the destination (or source) address is four bits, the bit address 'b' is three bits, and the LSB address value is one bit in length.

Examples: Given: R1 = 07H and register 01H = 05H:

BAND

R1,01H.1

R1 = 06H, register 01H = 05H

BAND

01H.1,R1

Register 01H = 05H, R1 = 07H

In the first example, source register 01H contains the value 05H (00000101B) and destination working register R1 contains 07H (00000111B). The statement "BAND R1,01H.1" ANDs the bit 1 value of the source register ("0") with the bit 0 value of register R1 (destination), leaving the value 06H (00000110B) in register R1.

6-17

Page 145
Image 145
Samsung S3F80JB manual Band Bit