yield

Yield (A32)

YIELD

Hints that the task is performing a spin-wait.

Pseudocode Operation

Hint(YIELD)

Encoding

Binary Layout

cond

31:28

00110

27:23

0

22

10

21:20

00

19:18

00

17:16

1

15

1

14

1

13

1

12

000000000001

11:0

 

Format System Hint

Opcode 0x0320F001

Extension A32 (Base)

Operands

Related

Other forms of yield

• yield Yield
• yield Yield (Thumb)

More in A32 (Base)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x0320F001	YIELD{<c>}{<q>}		A32		cond | 00110 | 0 | 10 | 00 | 00 | 1 | 1 | 1 | 1 | 000000000001
0xBF10	YIELD{<c>}{<q>}		T32		10111111 | 0001 | 0000
0xF3AF8001	YIELD{<c>}.W		T32		111100111010 | 1 | 1 | 1 | 1 | 10 | 0 | 0 | 0 | 000 | 0000 | 0001

Description

YIELD is a hint instruction. Software with a multithreading capability can use a YIELD instruction to indicate to the PE that it is performing a task, for example a spin-lock, that could be swapped out to improve overall system performance. The PE can use this hint to suspend and resume multiple software threads if it supports the capability. For more information about the recommended use of this instruction see The Yield instruction.

Operation

if ConditionPassed() then
    EncodingSpecificOperations();
    Hint_Yield();