IBM SA14-2339-04 Manual De Usuario

Instruction Set

Move To Special Purpose Register

mtspr
Move To Special Purpose Register

SPRN

←

SPRF

5:9

||

SPRF

0:4

(SPR(SPRN))

←

(RS)

The contents of register RS are placed into register RT. See “Special Purpose Registers” on
page 10-2 for a listing of SPR mnemonics and corresponding SPRN and SPRF values.

If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.

• SPR(SPRN)

• Reserved fields

• Invalid SPRF values

Execution of this instruction is privileged if instruction bit 11 is a 1. See “Privileged SPRs” on
page 2-32 for more information.

The SPR number (SPRN) specified in the assembler language coding of the mtspr instruction refers
to an SPR number (see “Special Purpose Registers” on page 10-2 for a list of SPRN values). The
assembler handles the unusual register number encoding to generate the SPRF field.

This instruction is part of the PowerPC User Instruction Set Architecture.

SPRN, RS

0

6

11

21

31