CBO.ZERO

Cache Block Zero

CBO.ZERO (rs1)

Zeros a cache block corresponding to the address in rs1.

Encoding

Binary Layout

000000000100

31:20

rs1

19:15

010000000001111

14:0

 

Format I-Type

Opcode 0x0040200F

Extension Zicboz

Operands

• rs1
  Address

Example

CBO.ZERO a0

Related

More in Zicboz

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

CBO.ZERO writes zeros to the cache block containing the effective address. Typically faster than a sequence of store instructions for zeroing memory.

Operation

memset(BlockAddr(rs1), 0, BlockSize);