Motorola CPU32 Reference Manual page 223

III
TRAPcc Trap on Condition
TRAPcc
Operation:
Assembler
Syntax:
Attributes:
If cc then TRAP
TRAPcc
TRAPcc.W #(data)
TRAPcc.L #(data)
Unsized or Size
=
(Word, Long)
Description: If the specified condition is true, causes a TRAPcc exception (vector number 7). The
address of the next instruction word (current PC) is pushed onto the stack. If the condition is not
true, the processor performs no operation and execution continues with the next instruction. The
immediate data operand must be placed in the word(s) immediately following the operation word.
It is available to the trap handler. Condition code cc specifies one of the following conditions.
cc Name Code Description cc Name Code
CC Carry Clear
0100
C lS low or Same
0011
CS Carry Set 0101 C IT less Than
1101
EQ Equal 0111 Z MI Minus
1011
F Never equal
0001 0
NE Not Equal
0110
GE Greater or Equal 1100
N.V+N.V
Pl
Plus 1010
GT Greater Than
1110
N.V.Z+N.V.Z T
Always true
0000
HI High
0010
e.z
VC Overflow Clear
1000
lE less or Equal 1111
Z+N.V+N.V
VS
Overflow Set 1001
Condition Codes:
Not affected.
Instruction Format:
15 14 13
12 11
10
9 8
7
6 5 4
3
o
I
1
I
0
I
1
I
CONDITiON
I
1
I
1
I
1
I
1
I
1
I
OPTiONAL WORD
OR lONG WORD
Instruction Fields:
Condition field - The binary code for one of the conditions listed in the table.
Opmode field - Selects the instruction form.
010- Instruction is followed by word-size operand.
011 - Instruction is followed by long-word-size operand.
100 - Instruction has no operand.
Description
C+Z
N.V+N.V
N
Z
N
V
V
2 0
OPMODE
MOTOROLA
4-170
INSTRUCTION SET CPU32 REFERENCE MANUAL