Power ISA™ Version 2.03 - Power.org

Version 2.03
3.3.14.1 Move To/From System Registers [Category: Embedded]
Move to Condition Register from XER Move From APID Indirect X-form
CR field BF XER 32:35 None
X-form
mfapidi RT,RA
mcrxr BF
31 RT RA /// 275 /
31 BF // /// /// 512 / 0 6 11 16 21 31
0 6 9 11 16 21 31
RT ← implementation-dependent value based on (RA)
CR 4×BF+32:4×BF+35 XER 32:35
The contents of RA are provided to any auxiliary processing
extensions that may be present. A value, that
XER 32:35 0b0000
The contents of XER 32:35 are copied to Condition Register
field BF. XER 32:35 are set to zero.
Special Registers Altered:
is implementation-dependent and extension-dependent,
is placed in RT.
Special Registers Altered:
Programming Note
This instruction is provided as a mechanism for
software to query the presence and configuration of
one or more auxiliary processing extensions. See
the implementation for details on the behavior of
this instruction.
Move To Device Control Register
User-mode Indexed
X-form
Move From Device Control Register
User-mode Indexed
X-form
mtdcrux
RS,RA
mfdcrux
RT,RA
31 RS RA /// 419 /
0 6 11 16 21 31
31 RT RA /// 291 /
0 6 11 16 21 31
DCRN ← (RA)
DCR(DCRN) ← RS
Let the contents of register RA denote a Device Control
Register. (The supported Device Control Registers are
implementation-dependent.)
The contents of RS are placed into the designated
Device Control Register. For 32-bit Device Control
Registers, the contents of bits 32:63 of RS are placed
into the Device Control Register.
See “Move To Device Control Register Indexed X-form”
on page 504 in Book III for more information on this
instruction.
Special Registers Altered:
Implementation-dependent
DCRN ← (RA)
RT ← DCR(DCRN)
Let the contents of register RA denote a Device Control
Register. (The supported Device Control Registers are
implementation-dependent.)
The contents of the designated Device Control Register
are placed into RT. For 32-bit Device Control Registers,
the contents of bits 32:63 of the designated Device
Control Register are placed into RT.
See “Move From Device Control Register Indexed
X-form” on page 505 in Book III for more information on
this instruction.
Special Registers Altered:
Implementation-dependent
Chapter 3. Fixed-Point Processor
87