Appendix B Invalid Instruction Forms; Invalid Forms Excluding Reserved Fields - IBM PowerPC 604 User Manual

Appendix B
Invalid Instruction Forms
This appendix describes how invalid instructions are treated by the PowerPC 604
microprocessor.
B.1 Invalid Forms Excluding Reserved Fields
The following table illustrates the invalid instruction forms of the PowerPC architecture
that are not a result of a nonzero reserved field in the instruction encoding.
Table B-1. Invalid Fonns (Excluding Reserved Flelds)
rA:O
rAln rAorrB SPRNot
Mnemonic 80
2
:0 or rA:O rA:rT:O
Range In Range
L:1
Implemented
rA:rD
bcctr
x
bcctrl
x
lbzu
x
lbzux
x
lhzu
x
lhzux
x
lhau
x
lhaux
x
lwzu
x
lwzux
x
stbu
x
stbux
x
sthu
x
sthux
x
stwu
x
stwux
x
lmw
x x
Appendix B. Invalid Instruction Forms
B-1
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