SHR (d, n)

Chapter 5 Instruction Specifications

Item number

Application instructions-4

 

 

Name

 

Shift right

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ladder format

 

 

 

 

 

 

Condition code

 

 

 

 

Processing time (s)

Remark

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R7F4

 

R7F3

 

R7F2

R7F1

 

R7F0

Average

Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHR (d, n)

 

 

DER

 

ERR

 

SD

 

V

 

 

 

C

 

 

 

 

 

 

Upper case: W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38

 

 

Lower case: DW

 

 

 

 

 

z

 

 

z

 

 

z

 

z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Instruction format

 

 

 

 

 

 

Number of steps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Condition

 

 

 

Steps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHR (d, n)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

46

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 right (toward the lower digits) by n bits.

Sets n bits of SD (R7F2) contents starting with the most significant bit.

Sets the content of the nth bit from the least significant bit in C (R7F0).

Before execution

 

d

 

 

 

 

 

 

 

n bits

 

 

 

 

SD

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SD (R7F2)

 

 

 

 

 

 

 

 

 

 

C (R7F0)

After execution

 

 

 

 

 

 

 

 

 

 

 

 

 

B

SD

 

SD

SD

SD

SD

 

 

 

 

 

 

 

 

 

n bits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Most significant bit (MSB)

 

 

 

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.

5-72

Page 122
Image 122
Hitachi NJI-350B manual Application instructions-4, Shift right, SHR d, n, After execution