#NUP ADD_256_BE (Intel) rk2

.model flat
.code

;Add256BE (c, a, b)
;c = a + b
;typedef int256_x int[8]
;Big-Endian

public func
func proc c public
    push ebp
    mov         ebp, esp
    push esi
    push ebx

    mov edx, 8[ebp]     ;c
    mov ebx, 12[ebp]    ;a
    mov esi, 16[ebp]    ;b

;   mov ecx, 6
;loop:  mov eax, [ebx+ecx*04h]
;   adc eax, [esi+ecx*04h]
;   mov [edx+ecx*04h], eax
;   каждый раз декремент/пуш

    mov eax, 28[ebx]    ;eax=a[7]
    add eax, 28[esi]    ;+b[7]
    mov 28[edx], eax    ;c[7]=a[7]+b[7]

    mov eax, 24[ebx]    ;eax=a[6]
    adc eax, 24[esi]    ;+b[6]
    mov 24[edx], eax    ;c[6]=a[6]+b[6]

    mov eax, 20[ebx]    ;5
    adc eax, 20[esi]
    mov 20[edx], eax

    mov eax, 16[ebx]    ;4
    adc eax, 16[esi]
    mov 16[edx], eax

    mov eax, 12[ebx]    ;3
    adc eax, 12[esi]
    mov 12[edx], eax

    mov eax, 8[ebx]     ;2
    adc eax, 8[esi]
    mov 8[edx], eax

    mov eax, 4[ebx]     ;1
    adc eax, 4[esi]
    mov 4[edx], eax

    mov eax, [ebx]      ;0
    adc eax, [esi]
    mov [edx], eax

    pop ebx
    pop esi
    mov eax, 16[esp]
    pop ebp
    ret
func endp
end