91
MB90246A Series
Table 19
Shift Type Instruction (Byte, Word, Long) [27 Instructions]
Note: For (a) and (b), refer to “Table 4 Number of Execution Cycles in Addressing Modes” and “Table 5 Correction
Values for Number of Cycles for Calculating Actual Number of Cycles.”
*1: Set to 3 when R0 is 0, otherwise 3 + (R0).
*2: Set to 3 when R0 is 0, otherwise 4 + (R0).
*3: Set to 3 when imm8 is 0, otherwise 3 + imm8.
*4: Set to 3 when imm8 is 0, otherwise 4 + imm8.
Mnemonic
#
~
B
Operation
LH AH
IS
T
N
Z
V C RMW
RORC A
ROLC A
RORC ear
RORC eam
ROLC ear
ROLC eam
ASR
A, R0
LSR
A, R0
LSL
A, R0
ASR
A, #imm8
LSR
A, #imm8
LSL
A, #imm8
2
2 +
2
2 +
2
3
2
3 + (a)
2
3 + (a)
*1
*3
0
2
× (b)
0
2
× (b)
0
byte (A)
← With right-rotate carry
byte (A)
← With left-rotate carry
byte (ear)
← With right-rotate carry
byte (eam)
← With right-rotate carry
byte (ear)
← With left-rotate carry
byte (eam)
← With left-rotate carry
byte (A)
← Arithmetic right barrel shift (A, R0)
byte (A)
← Logical right barrel shift (A, R0)
byte (A)
← Logical left barrel shift (A, R0)
byte (A)
← Arithmetic right barrel shift (A, imm8)
byte (A)
← Logical right barrel shift (A, imm8)
byte (A)
← Logical left barrel shift (A, imm8)
–
*
–
*
–
*
–
*
–
*
–
ASRW A
LSRW A/SHRW
A
LSLW A/SHLW A
ASRW A, R0
LSRW A, R0
LSLW A, R0
ASRW A, #imm8
LSRW A, #imm8
LSLW A, #imm8
1
2
3
2
*1
*3
0
word (A)
← Arithmetic right shift (A, 1 bit)
word (A)
← Logical right shift (A, 1 bit)
word (A)
← Logical left shift (A, 1 bit)
word (A)
← Arithmetic right barrel shift (A, R0)
word (A)
← Logical right barrel shift (A, R0)
word (A)
← Logical left barrel shift (A, R0)
word (A)
← Arithmetic right barrel shift (A, imm8)
word (A)
← Logical right barrel shift (A, imm8)
word (A)
← Logical left barrel shift (A, imm8)
–
*
–
*
–
*
–
*
R
*
–
*
–
ASRL A, R0
LSRL A, R0
LSLL
A, R0
ASRL A, #imm8
LSRL A, #imm8
LSLL
A, #imm8
2
3
*2
*4
0
long (A)
← Arithmetic right barrel shift (A, R0)
long (A)
← Logical right barrel shift (A, R0)
long (A)
← Logical left barrel shift (A, R0)
long (A)
← Arithmetic right barrel shift (A, imm8)
long (A)
← Logical right barrel shift (A, imm8)
long (A)
← Logical left barrel shift (A, imm8)
–
*
–
*
–
*
–
*
–