attn
Attention
attn
Stops execution and alerts the hardware debugger.
Encoding
Binary Layout
000000
0:5
00000
6:10
00000
11:15
00000
16:20
256
21:30
/
31
Operands
Related
More in Privileged
Reference
View in PowerISA v3.1C Specification ↗
OPF Power ISA v3.1C
Description
Stops execution and signals the hardware debugger, allowing entry into debug mode. This is a privileged instruction that halts the processor and alerts external debugging hardware. No condition registers or status fields are affected by the instruction itself; the processor state is frozen pending debugger intervention.
Operation
SignalDebugger()