On February 9-10 , 2009 , CSR and SiRF announced that they had entered into an agreement and plan of merger , pursuant to which a wholly owned subsidiary of CSR will merge with and into SiRF , with SiRF surviving the merger as a wholly owned subsidiary of CSR . Completion of the merger is subject to the approvals of CSR shareholders and SiRF stockholders , other customary closing conditions and the admission to the Official List of the UK Listing Authority of the CSR ordinary shares to be issued to SiRF stockholders .