dgh

Data Gathering Hint

DGH

Hints that multiple memory accesses should be merged.

Pseudocode Operation

// Hints that multiple memory accesses should be merged

Encoding

Binary Layout

11010101000000110010

31:12

0000

11:8

110

7:5

11111

4:0

 

Format System Hint

Opcode 0xD50320DF

Extension Base

Operands

Related

More in Base

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD50320DF	DGH		A64		11010101000000110010 | 0000 | 110 | 11111

Description

Data Gathering Hint is a hint instruction that indicates that it is not expected to be performance optimal to merge memory accesses with Normal Non-cacheable or Device-GRE attributes appearing in program order before the hint instruction with any memory accesses appearing after the hint instruction into a single memory transaction on an interconnect.

Operation

Hint_DGH();