Working on this code to sum up real numbers from an array, it's 32bit architecture so i'm using ecx and edx to hold the upper and lower values of the floating point number
as of right now the code will output the last real number from my array, and not the sum
any ideas or input is appreciated
;*************************************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