Encoding:

COP0

0100 00

RDPGPR

01 010

rt

rd

0

000 0000 0000

6

5

5

5

11

Format: 

RDPGPR rd, rt

MIPS32 Release 2

Read GPR from Previous Shadow Set

Purpose:

Read GPR from Previous Shadow Set

To move the contents of a GPR from the previous shadow set to a current GPR.

Description: 

 GPR[rd] = SGPR[SRSCtlPSS, rt]

The contents of the shadow GPR register specified by SRSCtlPSS (signifying the previous shadow set number) and rt

(specifying the register number within that set) is moved to the current GPR rd.

Restrictions:

In implementations prior to Release 2 of the Architecture, this instruction resulted in a Reserved Instruction exception.

Operation: 

GPR[rd] = SGPR[SRSCtlPSS, rt]

Exceptions:

Coprocessor Unusable

Reserved Instruction