Zilog Z16F2810 User Manual
Page 188
TCM Instruction
UM018809-0611
172
ZNEO
®
CPU Core
User Manual
TCM
Definition
Test Complement Under Mask
Syntax
TCM dst, src
Operation
~
dst AND src
Description
This instruction tests selected bits in the destination operand for a logical 1 value. Specify the bits
to be tested by setting a 1 bit in the corresponding bit position in the source operand (the mask).
The TCM instruction complements the value from the destination operand and ANDs it with the
source value (mask). Check the Zero flag to determine the result. If the
Z
flag is set, all of the
tested bits are 1. TCM does not alter the contents of the destination or source.
Flags
Flags are set based on the memory destination size, or 32 bits for register destinations.
7
6
5
4
3
2
1
0
C
Z
S
V
B
CIRQE IRQE
–
*
*
0
*
–
–
–
Legend
C
=
No change.
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 or source value is 0; otherwise set to 0.
CIRQE
=
No change.
IRQE
=
No change.
Note: