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require_extension('C'); if (insn.rvc_rd() == 2) { // c.addi16sp require(insn.rvc_addi16sp_imm() != 0); WRITE_REG(X_SP, sext_xlen(RVC_SP + insn.rvc_addi16sp_imm())); } else { require(insn.rvc_imm() != 0); WRITE_RD(insn.rvc_imm() << 12); }