pssbb

Physical Speculation Barrier

PSSBB

Prevents speculation on physical resources.

Pseudocode Operation

SpeculationBarrier(); // Physical speculation barrier; execution continues normally

Encoding

Binary Layout

11010101000000110011

31:12

0100

11:8

1

7

00

6:5

11111

4:0

 

Format System Hint

Opcode 0xD503349F

Extension Base (v8.5)

Operands

Related

Other forms of pssbb

• pssbb Physical Speculative Store Bypass Barrier (A32)

More in Base (v8.5)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD503349F	PSSBB		A64		11010101000000110011 | 0100 | 1 | 00 | 11111

Description

Physical Speculative Store Bypass Barrier is a memory barrier that prevents speculative loads from bypassing earlier stores to the same physical address under certain conditions. For more information and details of the semantics, see Physical Speculative Store Bypass Barrier (PSSBB).