APPENDIX A MIPS III INSTRUCTION SET DETAILS
520 Preliminary Users Manual S15543EJ1V0UM
LWR Load Word Right (3/3) LWR
Given a word in a register and a word in memory, the operation of LWR is as follows:
B C D E F GA H
J K L M N OI P
Register
Memory

LWR

vAddr2..0 Destination Type Offset
(LEM)
0
1
2
3
4
5
6
7
SSSSMNOP
SSSSEMNO
SSSSEFMN
SSSSEFGM
SSSSIJKL
SSSSEI JK
SSSSEFI J
SSSSEFGI
3
2
1
0
3
2
1
0
0
1
2
3
4
5
6
7
Remark
LEM
Little-endian memory (BigEndianMem = 0)
Type
AccessType (see Table 2-3. Byte Specification Related to Load and Store Instructions)
sent to memory
Offset
pAddr2..0 sent to memory

S

sign-extend of destination31
Exceptions:
TLB refill exception
TLB invalid exception
Bus error exception
Address error exception