CS301 – Fall 2002

Prof. Hartman

Homework #9

Due Friday, December 6th^th by 5:00 pm

Assemble the following short (and non-sensical) routine by hand. You may check your work with the assembler (well, #6 may be tricky), but I expect to see annotated bits in the ModR/M byte and SIB byte if they are needed. (That is, explain in a couple of words why the first two bits are 11, for example).

1. pusha
2. add edx, ebx
3. mov dword [0DEADBEEFh], 12
4. dec byte [edx + 4*esi + 0FACEh]
5. cmp word [esi],1Bh
6. ja label
7. fmul st3
8. label: rcr dl,cl
9. sar dword [ebx + esi],2
10. leave