PREFETCH.I

Prefetch Instruction

PREFETCH.I offset(rs1)

Hints to hardware to bring the cache block containing the instruction at the address into the instruction cache.

Encoding

Binary Layout

imm12hi

31:25

00000

24:20

rs1

19:15

110000000010011

14:0

 

Format S-Type (Hint)

Opcode 0x00006013

Extension Zicbop

Operands

• rs1
  Base Address
• offset
  Offset

Example

PREFETCH.I 0(x10)

// Prepare I-Cache for upcoming jump.

Related

More in Zicbop

Reference

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

Description

PREFETCH.I is a hint to the memory system to prefetch the cache block at the address rs1+offset into the instruction cache.

Operation

Prefetch(I-Cache, R[rs1] + offset);