Encoding:

Format:

RDPGPR rt, rs

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[rt] = SGPR[SRSCtlPSS, rs]

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

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

Restrictions:

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

Operation:

GPR[rt] = SGPR[SRSCtlPSS, rs]

Exceptions:

Coprocessor Unusable

Reserved Instruction