Question

3. Write a complete assembly language program to read two matrices (2-dim arrays) A and B and display the resulting matrix C, which is the sum of A and B. Procedures must be used to organize the code.

Answer 1

386 MODEL flat,stdcall STACK 4096 extern ExitProcess@4: Near data array2D ows by 4 Columns Data area Dword 1,2,3,4 Dword 5,6,7,8 Dword 9,10,11,12 rowSumArray Dword 1,1,1 two sum init array's columnsumArray Dword 1 , 1 , 1 , 1 .code ; Code area main: mov eax,offset columnSumArray

push offset columnsumArray push offset rowSumArray push 4 push 3 push offset array2D call Sum2DimArray push Blac k box. Always terminate call ExitProcess@4 ;progr am with this sequence ; Name: Sum2DimArray ; Input: 2d array pointer, rows, columns, rowSumArray, columnSumArray,

Description: this function sum the rows item in the 2d array and put it in the r owSumArray, and sum the columns and pu t it in the columnSumArray Sum2DimArray PROOC ParamSize - 5*4 matrixAddress = 8 rowsNumPlace - matrixAddress 4 columnsNumPlace rowsNumPlace 4 rowsSumArraycolumnsNumPlace + 4 columnsSumArray -rowsSumArray + 4 push ebp using the ebp as function variables poin ter mov ebp,esp

mov ebp,esp push ecx push eax push ebx push esi 2d array item pointer push edx mov eax, 0 mov ebx, O rows counter columns counter mov esi, [ebp+matrixAddress] esi points on the first 2d array value Rows Loop: rows 1oop mov ebx, 0

ColumnsLoop: columns loop mov ecx, [esi] ecx is the current value mov add mov add edx, [ebp+rowsSumArray] [eax-type dword*eax] , ecx edx, [ebp+columnsSumArray] [eax+type dword*ebx],ecx inc ebx add esi,sizeof Dword cmp ebx, [ebp+columnsNumPlace] jne ColumnsLoop inc eax cmp eax. ГеЬ0+rows NumPlace1

cmp jne ebx, [ebp-columnsNumPlace] ColumnsLoop inc cmp jne eax eax, [ebp+row s NumPlace] RowsLoop pop edx pop esl pop ebx pop eax pop ecx pop ebp ret ParamSize Sum2DimArray ENDP end End of program main Label is the entry point.