NEC Network Controller uPD98502 - Manual (Page 536)

APPENDIX A MIPS III INSTRUCTION SET DETAILS
536 Preliminary User’s Manual S15543EJ1V0UM
OR
Or
OR
rs
SPECIAL
0 0 0 0 0 0
rt rd
0
0 0 0 0 0
OR
1 0 0 1 0 1
31 26 25 21 20 16 15 11 10 6 5 0
6 5 5 5 5 6
Format:
OR rd, rs, rt
Description:
The contents of general register rs are combined with the contents of general register rt in a bit-wise logical OR
operation. The result is placed into general register rd.
Operation:
32, 64 T: GPR [rd] ← GPR [rs] or GPR [rt]
Exceptions:
None