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POnasm sum of real number array, assembly
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copied!<p>this is an extension to my previous post, here is the updated code, so far it will ouput the last number I inputed into the array, so it's not actually summing values yet</p> <pre><code>;*************************************ADD ARRAY********************************************** segment .bss sum resq 1 segment .data summessage db "The Sum is: ", 0 segment .text extern readdouble,print_string, read_int, writedouble, print_nl, print_int global addarray addarray: pusha mov edi, 0 ;initialize counter to 0 mov esi, 0 ;initialize accum to 0 ;mov ecx, 0 ;zero out ecx and edx ;mov edx, 0 mov ebx, [ebp] ;moves starting location of array1 into ebx mov edi, [ebp+12] ;moves array size add_loop: mov ecx, [ebx] ;mov higher order mov edx, [ebx+4] ;mov lower order push ecx push edx fldz fld qword [esp] ;The second input is now in a floating point register, specifically st0. pop dword ecx pop dword edx ;The first input is now on top of the system stack (the stack addressed by bytes) fadd qword [esp] ;The first input is added to the second input and the sum ;replaces the second input in st0 add ebx,8 inc esi cmp edi, esi jz add_done jmp add_loop add_done: call print_nl mov eax, summessage ;Setup to display a message call print_string ;Dr. Carter's library push dword 0 ;Make space on sytem stack for the sum value push dword 0 ;Ditto fst qword [esp] ;Copy contents of st0 to space currently on top of the system stack pop edx ;Copy 4 MSBs to ecx pop ecx ;Copy 4 LSBs to ecx call writedouble ;Show the 8-byte value call print_nl ;Newline popa ret </code></pre>

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