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9-116 PPC405 Core User’s Manual
mtcrf
Move to Condition Register Fields
mtcrf
Move to Condition Register Fields
mask ←
4
(FXM
0
) ||
4
(FXM
1
) || ... ||
4
(FXM
6
) ||
4
(FXM
7
)
(CR)
← ((RS) ∧ mask) ∨ ((CR) ∧¬mask)
Some or all of the contents of register RS are placed into the CR as specified by the FXM field.
Each bit in the FXM field controls the copying of 4 bits in register RS into the corresponding bits in the
CR. The correspondence between the bits in the FXM field and the bit copying operation is shown in
the following table:
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
•CR
Invalid Instruction Forms
• Reserved fields
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
mtcrf FXM, RS
31 RS FXM 144
0 6 11 12 20 21 31
FXM Bit
Number
Bits
Controlled
0 0:3
1 4:7
2 8:11
3 12:15
4 16:19
5 20:23
6 24:27
7 28:31
Table 9-22. Extended Mnemonics for mtcrf
Mnemonic Operands Function
Other Registers
Altered
mtcr RS Move to CR.
Extended mnemonic for
mtcrf 0xFF,RS