sevl

Send Event Local

SEVL

Sends an event locally to the executing processor.

Pseudocode Operation

# Set local event flag
LOCAL_EVENT_FLAG ← 1
PC ← PC + 4

Encoding

Binary Layout

11010101000000110010

31:12

0000

11:8

101

7:5

11111

4:0

 

Format System Alias

Opcode 0xD50320BF

Extension Base

Operands

Related

Other forms of sevl

• sevl Send Event Local (A32)
• sevl Send Event Local (Thumb)

More in Base

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD50320BF	SEVL		A64		11010101000000110010 | 0000 | 101 | 11111

Description

Send Event Local is a hint instruction that causes an event to be signaled locally without requiring the event to be signaled to other PEs in the multiprocessor system. It can prime a wait-loop which starts with a WFE instruction.

Operation

SendEventLocal();