IMM
u_int IMM;
IMM = extract_field(instr, 31 - 31, 16);
if (IMM & 0x8000) {
IMM = 0x10000-IMM;
IMM = extract_field(instr, 31 - 31, 16);
db_printf("0x%x", IMM);
moveq IMM n,%d0;\
trap IMM 15
moveq IMM s,%d1;\