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C.JR

RISC-V C.JR Instruction Details

Instruction ManualC-type

Jump via register: pc = rs1. CR format. rs1!=x0.

Instruction Syntax

c.jr rs1
Operand Breakdown
Compressed instructions are 16 bits; registers are often limited to x8–x15.
Immediate fields are narrower. Refer to the full encoding for this compressed instruction.
CCompressed Instruction
Related Search Terms
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Instruction Behavior

C.JR (CR format) jumps to address in rs1. Expands to jalr x0,0(rs1). Valid only when rs1≠x0 (rs1=x0 reserved). Does not save return address.

Common Usage Scenarios

Function Call & Return

Understand this scenario with real code like «c.jr ra # return».

Pre-Use Checklist

Syntax Check
  • Confirm the current instruction format is C-type.
  • Confirm the operand order matches the example.
Semantic Check
  • Ensure the destination register usage is compatible with the calling convention.
  • Confirm this is not the lower-level form of a pseudo-instruction expansion.

Pitfalls / Common Confusions

rs1 cannot be x0