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BSET
Operation:
Assembler:
Attributes:
Description:
appropriately, then sets the specified bit in the destination operand. When a data reg-
ister is the destination, any of the 32 bits can be specified by a modulo 32 bit number.
When a memory location is the destination, the operation is a byte operation, and the
bit number is modulo 8. In all cases, bit zero refers to the least significant bit. The bit
number for this operation can be specified in two ways:
1. Immediate — The bit number is specified by the second word of the instruc-
tion.
2. Register — The specified data register contains the bit number.
Condition Codes:
X
N
Z
—
—
*
X
Not affected.
N
Not affected
Z
Set if the bit tested is zero. Cleared otherwise
V
Not affected
C
Not affected.
Instruction Format (Bit Number Static, specified as immediate data):
15
14
13
0
0
0
0
0
0
MOTOROLA
4-44
Test a Bit and Set
(〈bit number〉of Destination) → Z;
1 → 〈bit number〉 of Destination
BSET Dn, 〈ea〉Syntax:
BSET #〈data〉, 〈ea〉
Size = (Byte, Long)
Tests a bit in the destination operand, sets the Z condition code
V
C
—
—
12
11
10
9
0
1
0
0
0
0
0
0
INSTRUCTION SET
8
7
6
5
0
1
1
0
BSET
4
3
2
1
EFFECTIVE ADDRESS
MODE
REGISTER
BIT NUMBER
REFERENCE MANUAL
0
CPU32
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