Zilog Z16F2810 User Manual
Page 100
COM Instruction
UM018809-0611
84
ZNEO
®
CPU Core
User Manual
COM
Definition
Complement
Syntax
COM dst
Operation
dst
~
dst
Description
The contents of the destination operand are complemented (one’s complement). All 1 bits are
changed to 0 and all 0 bits are changed to 1.
Flags
Flags are set based on the 32-bit destination register value.
Syntax and Opcodes
7
6
5
4
3
2
1
0
C
Z
S
V
B
CIRQE IRQE
0
*
*
0
*
–
–
–
Legend
C
= Cleared 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
= Cleared to 0.
B
= Set to 1 if the initial destination value was 0; otherwise set to 0.
CIRQE
= No change.
IRQE
= No change.
Instruction, Operands
Word 0
Word 1
Word 2
COM Rd
{454H, Rd}
Note: