msgclr
Message Clear
msgclr RB
Clears a pending doorbell interrupt (Inter-processor comms).
Details
The msgclru instruction clears a message previously accepted by the thread executing the msgclru. If the message type is 0x05, it also clears any Directed Ultravisor Doorbell exception for that thread.
Pseudocode Operation
t ← hypervisor thread number of executing thread
if (msgtype = 0x05) then
clear any Directed Ultravisor Doorbell exception for thread tProgramming Note
Use msgclr to clear messages accepted by the current thread. If clearing a message of type 0x05, it also clears any associated Directed Ultravisor Doorbell exception. This instruction is typically used in hypervisor environments where message handling and doorbell management are required.
Example
msgclr r5
Encoding
Binary Layout
31
0
/
6
/
11
RB
16
118
21
/
31
Operands
-
RB
Message Type