Hitachi SH7750 Programming Manual page 324

Res2+=MACH&0x00007FFF;
if(((long)Res2<0)&&(Res2<0xFFFF8000)){
Res2=0xFFFF8000;
Res0=0x00000000;
}
if(((long)Res2>0)&&(Res2>0x00007FFF)){
Res2=0x00007FFF;
Res0=0xFFFFFFFF;
};
MACH=(Res2&0x0000FFFF)|(MACH&0xFFFF0000);
MACL=Res0;
}
else {
Res0=MACL+Res0;
if (MACL>Res0) Res2++;
Res2+=MACH;
MACH=Res2;
MACL=Res0;
}
PC+=2;
}
Rev. 2.0, 03/99, page 310 of 396