Intel 8XC196K Series User Manual page 473

8XC196K x , J x , CA USER'S MANUAL
Mnemonic
SHRA ARITHMETIC RIGHT SHIFT WORD. Shifts
the destination word operand to the right as
many times as specified by the count
operand. The count may be specified either
as an immediate value in the range of 0 to 15
(0FH), inclusive, or as the content of any
register (10H – 0FFH) with a value in the
range of 0 to 31 (1FH), inclusive. If the
original high order bit value was "0," zeroes
are shifted in. If the value was "1," ones are
shifted in. The last bit shifted out is saved in
the carry flag.
←
Temp
do while Temp
←
C
(DEST)
Temp
end_while
Z
SHRAB ARITHMETIC RIGHT SHIFT BYTE. Shifts the
destination byte operand to the right as many
times as specified by the count operand. The
count may be specified either as an
immediate value in the range of 0 to 15
(0FH), inclusive, or as the content of any
register (10H – 0FFH) with a value in the
range of 0 to 31 (1FH), inclusive. If the
original high order bit value was "0," zeroes
are shifted in. If the value was "1," ones are
shifted in. The last bit shifted out is saved in
the carry flag.
←
Temp
do while Temp
C = Low order bit of (DEST)
(DEST)
Temp
end_while
Z
A-34
Table A-6. Instruction Set (Continued)
Operation
(COUNT)
≠
0
Low order bit of (DEST)
←
(DEST)/2
←
Temp – 1
PSW Flag Settings
N C V VT
0 —
(COUNT)
≠
0
←
(DEST)/2
←
Temp – 1
PSW Flag Settings
N C V VT
0 —
Instruction Format
SHRA wreg,#count
(00001010) (count) (wreg)
or
SHRA wreg,breg
(00001010) (breg) (wreg)
NOTE: This instruction clears the sticky
bit flag at the beginning of the
instruction. If at any time during
the shift a "1" is shifted into the
carry flag and another shift cycle
occurs, the instruction sets the
sticky bit flag.
In this operation, DEST/2 repre-
sents signed division.
ST
SHRAB breg,#count
(00011010) (count) (breg)
or
SHRAB breg,breg
(00011010) (breg) (breg)
NOTES: This
sticky bit flag at the beginning
of the instruction. If at any time
during the shift a "1" is shifted
into the carry flag and another
shift cycle occurs, the instruc-
tion sets the sticky bit flag.
In this operation, DEST/2 rep-
resents signed division.
ST
instruction clears the