if (VM.VerifyAssertions) VM.assert(n < 2);
if (VM.VerifyAssertions) VM._assert(n < 2);
  final OPT_Register getGPRParam(int n) {    if (VM.VerifyAssertions) VM.assert(n < 2);    if (n==0) {      return getEAX();    } else {