Motorola CPU32 Reference Manual page 96

BCHG
Test a Bit and Change
BCHG
Instruction Fields (Bit Number Static):
Bit Number field - Specifies the bit number.
Effective Address field - Specifies the destination location.
Only data alterable addressing modes are allowed as shown:
Addressing Mode Mode Register Addressing Mode Mode Register
Dn*
000
Reg. number: Dn (xxx).w
111 000
An
- -
(xxx).L
111 001
(An)
010
Reg. number: An
#(data) - -
(An) +
011
Reg. number: An
-(An)
100
Reg. number: An
(d16. An)
101
Reg. number: An
(d16. PC)
-
-
(da. An. Xn)
110
Reg. number: An
(de. PC. Xn)
- -
(bd. An. Xn)
110
Reg. number: An (bd. PC. Xn)
- -
*Long only; all others are byte only
Instruction Format (Bit Number Dynamic, specified in a register):
15 14 13 12 11 10
9
a
7
6 5
4 3
2
o
EFFECTIVE ADDRESS
0 0 0 0
REGISTER
1 0 1
I
MODE REGISTER
Instruction Fields (Bit Number Dynamic):
Register field - Specifies the data register that contains the bit number.
Effective Address field - Specifies the destination location. Only data alterable addressing
modes are allowed as shown:
Addressing Mode Mode Register Addressing Mode
Dn*
000
Reg. number: Dn (xxx).w
An
- -
(xxx).L
(An) 010
Reg. number: An
#(data)
(An)
+ 011
Reg. number: An
-(An)
100
Reg. number: An
(d16. An) 101
Reg. number: An
(d16. PC)
(da. An. Xn)
110
Reg. number: An
(de. PC. Xn)
(bd. An. Xn)
110
Reg. number: An (bd. PC. Xn)
*Long only; all others are byte only
CPU32 REFERENCE MANUAL INSTRUCTION SET
Mode
111
111
-
-
-
-
Register
000
001
-
-
-
-
MOTOROLA
4-43
III