sb

Speculation Barrier

SB

Prevents speculative execution across the barrier.

Pseudocode Operation

SpeculationBarrier()

Encoding

Binary Layout

11010101000000110011

31:12

0000

11:8

1

7

11

6:5

11111

4:0

 

Format System Hint

Opcode 0xD50330FF

Extension Base (v8.0+)

Operands

Related

Other forms of sb

• sb Speculation Barrier (A32)

Across architectures

Speculation Barrier : how x86, ARM, RISC-V, and PowerISA each do this.

More in Base (v8.0+)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD50330FF	SB		A64		11010101000000110011 | 0000 | 1 | 11 | 11111

Description

Speculation Barrier is a barrier that controls speculation. For more information and details of the semantics, see Speculation Barrier (SB).

Operation

SpeculationBarrier();