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NAME
cpTRAPcc -- Exception generation on coprocessor condition
SYNOPSIS
cpTRAPcc
cpTRAPcc #<data>
No size specs, or size of data: (Word, Long).
FUNCTION
If specified coprocessor condition is true, exception vector n°7
is generated. Value of saved PC is next instruction one (return
address).
If given condition is false, PC takes the value of next instruction.
Immediate data placed at instruction end is an information which can
be used by the exception sub-routine.
FORMAT
-----------------------------------------------------------------
|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|-----------|---|---|---|---|---|---|-----------|
| 1 | 1 | 1 | 1 | CP-ID =! 0| 0 | 0 | 1 | 1 | 1 | 1 | OP-MODE |
|---|---|---|---|-----------|---|---|---|-----------------------|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |COPROSSESSOR CONDITION |
|---------------------------------------------------------------|
| OPTIONAL COPROCESSOR EXTENSION WORD |
|---------------------------------------------------------------|
| 16 BITS DATA or |
|---------------------------------------------------------------|
| 32 BITS DATA (LOW WEIGHT PART) |
-----------------------------------------------------------------
OP-MODE
010->instruction contains a 16 bits operand.
011->instruction contains a 32 bits operand.
100->instruction has no operands.
CP-ID field identify coprocessor (1 to 7). If CP-ID=0,
"line emulation F" exception is generated.
"COPROSSESSOR CONDITION" field, specifies condition to test.
This condition is addressed to coprocessor which, after examining
this one, address directives to processor in order to execute
the instruction.
RESULT
Not affected.
SEE ALSO
cpDBcc