Cpu Instruction Opcode Bit Encoding - NEC uPD98502 User Manual

A.6 CPU Instruction Opcode Bit Encoding
Figure A-1 lists the V 4120A Opcode Bit Encoding.
R
28...26
31...29 0
0 SPECIAL
1 ADDI
2 COP0
3 DADDIε
4 LB
5 SB
6 *
7 *
2...0
5...3 0
0 SLL
1 JR
2 MFHI
3 MULT
4 ADD
5 MACC
6 TGE
7 DSLLε
18...16
20...19 0
0 BLTZ
1 TGEI
2 BLTZAL
3 *
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APPENDIX A MIPS III INSTRUCTION SET DETAILS
Figure A-1. V 4120A Opcode Bit Encoding (1/2)
R
1 2
REGIMM J JAL
ADDIU SLTI SLTIU
π π
DADDIUε LDLε LDRε
LH LWL
SH SWL SW
π π
π π
SPECIAL function
1 2
* SRL SRA
JALR *
MTHI MFLO MTLO
MULTU DIV DIVU
ADDU SUB SUBU
DMACC SLT SLTU
TGEU TLT TLTU
* DSRLε DSRAε
REGIMM rt
1 2
BGEZ BLTZL BGEZL
TGEIU TLTI TLTIU
BGEZAL BLTZALL BGEZALL
* *
Preliminary User's Manual S15543EJ1V0UM
Opcode
3 4 5
BEQ BNE
ANDI ORI
* BEQL BNEL
JALX θ
*
LW LBU LHU
SDLε SDRε
π
* *
π
* *
3 4 5
SLLV *
* SYSCALL BREAK
DSLLVε *
DMULTε DMULTUε
AND OR
DADDε DADDUε
TEQ *
DSLL32ε *
3 4 5
* *
TEQI *
* *
* * *
6 7
BLEZ BGTZ
XORI LUI
BLEZL BGTZL
* *
LWR LWUε
SWR CACHEδ
π
LDε
π
SDε
6 7
SRLV SRAV
* SYNC
DSRLVε DSRAVε
DDIVε DDIVUε
XOR NOR
DSUBε DSUBUε
TNE *
DSRL32ε DSRA32ε
6 7
* *
TNEI *
* *
* *