Zilog Z16F2810 User Manual
Page 163
UM018809-0611
RL Instruction
ZNEO
®
CPU Core
User Manual
147
RL
Definition
Rotate Left
Syntax
RL dst, src
Operation
Description
The destination operand contents rotate to the left by the number of bit positions (0–31) specified
in bits [4:0] of the source operand. On each bit rotate iteration, the value of Bit 31 is moved to Bit
0 and also into the Carry (
C
) flag. The source register value is not changed.
Flags
Flags are set based on the 32-bit destination register value.
7
6
5
4
3
2
1
0
C
Z
S
V
B
CIRQE IRQE
*
*
*
*
0
–
–
–
Legend
C
=
Set to 1 if the last bit shifted out is 1; otherwise set to 0.
Z
=
Set to 1 if the result is zero; otherwise, set to 0.
S
=
Set to 1 if the result msb is 1; otherwise set to 0.
V
=
Set to 1 if the Carry and Sign flags are different; otherwise set to 0.
B
=
Cleared to 0.
CIRQE
=
No change.
IRQE
=
No change.
dst
C
src
31
0
Note: