Chapter 5 Instruction Specifications

Item number

Application instructions-9

 

 

Name

 

Logical shift left

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ladder format

 

 

 

 

 

 

Condition code

 

 

 

 

Processing time (s)

Remark

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R7F4

 

R7F3

 

R7F2

R7F1

 

R7F0

Average

Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LSL (d, n)

 

 

DER

 

ERR

 

SD

 

V

 

 

 

C

 

 

 

 

 

Upper case: W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

 

Lower case: DW

 

 

 

 

 

z

 

 

z

 

 

z

 

z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Instruction format

 

 

 

 

 

 

Number of steps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Condition

 

 

 

Steps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LSL (d, n)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

 

 

Word

 

Double word

 

Constant

 

 

Usable I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Other

 

X

Y

M

 

 

CU, CT

 

WX

WY

WM

 

TC

DX

DY

DM

 

 

 

 

 

 

 

R,

 

 

TD, SS,

 

 

 

 

WR,

 

 

 

 

DR,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

d

I/O to be shifted

 

 

 

 

 

 

 

 

 

 

{

 

{

 

{

 

{

{

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

n

Number of bits to be

 

 

 

 

 

 

 

 

 

{

{

 

{

 

{

 

 

 

 

{

The constant is set in

shifted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

decimal.

Function

Shifts the contents of d to the left (toward the upper digits) by n bits.

“0” is set from the least significant bit to the nth bit.

The content of the nth bit from the most significant bit is set in C (R7F0).

LSL (d, n)

Before execution

 

 

 

 

 

d

 

 

 

 

 

n bits

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

C (R7F0)

After execution

B

Most significant bit (MSB)

0

0

0

0

 

0

 

n bits

Least significant bit (LSB)

If d is a word:

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n

 

(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)

 

The n (constant) can be set to 0 to 15 (decimal).

If d is a double word:

Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n

 

(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)

 

The n (constant) can be set to 0 to 31 (decimal).

Notes

If n is equal to “0,” the shifting is not performed. The previous state is retained in C.

Program example

 

X00001 DIF1

 

 

 

LD

X00001

 

LSL

(WR0000 ,1 )

 

AND

DIF1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LSL

(WR0000 ,1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

]

 

Program description

When X00001 rises, the content of WR0000 is shifted to the left by one bit.

At this time, “0” is set in b0 and the value of b15 immediately prior to the shift is set in R7F0.

5-79

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Image 129
Hitachi NJI-350B manual Application instructions-9, Logical shift left, LSL d, n, If d is a word