if (VM.VerifyAssertions) VM.assert(fits(S,16));
if (VM.VerifyAssertions) VM._assert(fits(S,16));
  final void emitSFI (int RA, int RS, int S) {    if (VM.VerifyAssertions) VM.assert(fits(S,16));    INSTRUCTION mi = SFItemplate | RS<<21 | RA<<16 | S;    if (VM.TraceAssembler)      asm(mIP, mi, "sfi", RA, RS, signedHex(S));    mIP++;    mc.addInstruction(mi);  }