If specified coprocessor condition is true, program execution continues to address pointed by searching PC more offset. Searching PC contains address of first word of offset. Offset is a signed value of 16 or 32 bits, which represents the relative gap in bytes between the searching PC and destination address.
------------------------------------------------------------------ |15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |---|---|---|---|-----------|---|---|----|-----------------------| | 1 | 1 | 1 | 1 | CP-ID =! 0| 0 | 1 |SIZE|COPROSSESSOR CONDITION | |----------------------------------------------------------------| | OPTIONAL COPROCESSOR EXTENSION WORD | |----------------------------------------------------------------| | 16 BITS OFFSET | |----------------------------------------------------------------| | 32 BITS OFFSET (LOW WEIGHT PART) | ------------------------------------------------------------------ SIZE 0->one Word operation 1->one Long operation 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.