MIPS R4000 Microprocessor User's Manual A-49
CPU Instruction Set Details
Format:
COPz cofun
Description:
A coprocessor operation is performed. The operation may specify and
reference internal coprocessor registers, and may change the state of the
coprocessor condition line, but does not modify state within the processor
or the cache/memory system. Details of coprocessor operations are
contained in Appendix B.
Operation:
Exceptions:
Coprocessor unusable exception
Coprocessor interrupt or Floating-Point Exception (R4000 CP1 only)
*Opcode Bit Encoding:
COPz
Coprocessor Operation
31 25 2426
COPz
6
0
cofun
251
CO
0 1 0 0 x x* 1
COPz
32, 64 T: CoprocessorOperation (z, cofun)
COPz
000001
31 30 29 28 27 26
Bit #
25
0
C0P0
1
CO sub-opcode (see end of Appendix A)
000011
31 30 29 28 27 26
Bit #
25
0
C0P1
1
000101
31 30 29 28 27 26
Bit #
25
0
C0P2
1
Coprocessor Unit Number
Opcode
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