Method FilterItanium_SetBits

Libraries/unrar/rarvm.cpp:348–364

void RarVM::FilterItanium_SetBits(byte *Data,uint BitField,uint BitPos,uint BitCount)
{
  uint InAddr=BitPos/8;
  uint InBit=BitPos&7;
  uint AndMask=0xffffffff>>(32-BitCount);
  AndMask=~(AndMask<<InBit);

  BitField<<=InBit;

  for (uint I=0;I<4;I++)
  {
    Data[InAddr+I]&=AndMask;
    Data[InAddr+I]|=BitField;
    AndMask=(AndMask>>8)|0xff000000;
    BitField>>=8;
  }
}