if (VM.VerifyAssertions) VM.assert(fits(D, 16));
if (VM.VerifyAssertions) VM._assert(fits(D, 16));
  final void emitSTM(int RT, int D, int RA) {    if (VM.VerifyAssertions) VM.assert(fits(D, 16));    INSTRUCTION mi = (47<<26)  | RT<<21 | RA<<16 | (D&0xFFFF);    if (VM.TraceAssembler)      asm(mIP, mi, "lm", RT, signedHex(D), RA);    mIP++;    mc.addInstruction(mi);  }