Reference no: EM13767045

1.(20pts) Following is the C/C++ code for comparing two integers:

if (x > y) result = 0;

else result = 1;

Convert the code above to its assembler equivalent, preserving the same functionality of the code.

2. Given the BYTE array "source", write an ASM procedure which reverses the string source and places the result into BYTE "destination". Pay attention to the difference in string sizes vs. individual character locations.

.DATA

source BYTE "Here I am looking for a letter A",0

destination BYTE SIZEOF source DUP (0)

.CODE

3. Consider the following variables in the .DATA section, then follow the code execution to populate the stack allocation.

.DATA

Var1 WORD 1234h, 5678h

Var2 BYTE 0D4h, 0B3h

Var3 DWORD 0DEADBEEFh, 0F00FDEEDh

4. Assuming that data allocations for this program begin at 0x00401000h what will be the values of AX, ECX and EDI registers at the indicated locations?

.data

intarray WORD 100h,200h,300h,400h

.code

mov edi,OFFSET intarray                                    EDI:_________________________

mov ecx,LENGTHOF intarray                               ECX:_________________________

mov ax,0     

L1:

add ax,[edi]

 add edi,TYPE intarray    

loop L1         

                                                                         EDI:_________________________

                                                                         ECX:_________________________

                                                                         AX:__________________________

5. Convert the following compound expressions to assembly code:

a) if (al >= bl) AND (bl < cl)

     X = 1;

b) if (al >= bl) OR (al > cl)

     X = 1;

6. a) Write code that jumps to label L1 if either bit 1, 5, or 7 is set in the BL register.

Write code that jumps to label L1 if bits 2, 3, and 4 are all set in the BL register.

Write code that jumps to label L3 if EAX is negative.

Write code that jumps to label L4 if the expression (EBX - ECX) is greater than zero.