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

LDR

vAddr2..0 Destination Type Offset
(LEM)
0
1
2
3
4
5
6
7
IJKLMNOP
AIJKLMNO
ABIJKLMN
ABCIJKLM
ABCDIJKL
ABCDE I JK
ABCDEF IJ
ABCDEFG I
7
6
5
4
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
Exceptions:
TLB refill exception
TLB invalid exception
Bus error exception
Address error exception
Reserved instruction exception (32-bit user mode/supervisor mode)