PowerPC e500 Core Family Reference Manual, Rev. 1
3-64 Freescale Semiconductor
Instruction Model
bbelr bbelr
Branch Buffer Entry Lock Reset
bbelr
bbea ← BBEAR
0:29
BranchBufferEntryLockReset(bbea)
A BTB entry associated with the effective address specified in BBEAR has its lock reset. If no
BTB entry is associated with the address, or if the entry exists but it is not locked, the instruction
is a no-op and no other status is reported. After bbelr executes, the entry continues to be valid in
the BTB with all its attributes unchanged.
This instruction can always be executed in supervisor mode. In user mode, if MSR[UBLE] is
cleared, a privileged instruction exception is taken; if MSR[UBLE] is set, the instruction executes
without a privileged instruction exception.
056 2021 31
011111000000
0
0000000010001001100
BTB APU User
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