C program for bit masking

Hi, the input will be something like 0xffff0005 or 0x3ff0005. and i need to get the most significant bit part by itself. for example in the second case 0x3ff0005, i need an int that just has 0x3ff in it. thank you ver much. the professor said that we need to get the 16 most significant bits. Also, I believe I need to turn 0x3ff0005 into 0x03ff0005 for this to work since that case is shorter than the first one. thanks. Again 0xffff0005 must return 0xffff. The 5 at the end needs to get out of there and it needs to be shifted