#NUP MAX_256_LE (Intel) EXAM

.model flat
.code

;EXAM(17june)
;MAX256LE (c, a, b)
;c = max( a, b )
;typedef int int256_x[8]
;LE

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

    mov     esi, 8[ebp]
    mov     edx, 12[ebp]
    mov     ebx, 16[ebp]

    mov     eax, [edx]
    cmp     eax, [ebx]
    jl  loopb
    jne loopa

    mov     ecx, 7
comp:
    mov     eax, [edx+ecx*4]
    cmp     eax, [ebx+ecx*4]
    ja  loopa
    jb  loopb
    dec     ecx
    jnl comp

loopa:  mov     ecx, 7
a:  mov     eax, [edx+ecx*4]
    mov     [esi+ecx*04h], eax
    dec     ecx
    jnl a
    jmp exit

loopb:  mov     ecx, 7
b:  mov     eax, [ebx+ecx*4]
    mov     [esi+ecx*04h], eax
    dec     ecx
    jnl b

exit:
    pop     ecx
    pop         ebx
    pop         esi
    pop     ebp

    ret

func    endp
end


//Main.c:

#include <stdio.h>
#pragma warning(disable:4100)

typedef int int256[8];

int main( int ac, char **av, char **env )
{
    int256   a, b, c;
    a[0] = 0x00000000; a[1] = 0x00000000; a[2] = 0x00000000; a[3] = 0x00000000; a[4] = 0x00000000; a[5] = 0x00000000; a[6] = 0x00000000; a[7] = 0x00000000;
    b[0] = 0x00000000; b[1] = 0xF0000000; b[2] = 0x00000000; b[3] = 0x00000000; b[4] = 0x00000000; b[5] = 0x00000000; b[6] = 0x00000000; b[7] = 0x00000000;
    c[0] = 0x77777777; c[1] = 0x77777777; c[2] = 0x77777777; c[3] = 0x77777777; c[4] = 0x77777777; c[5] = 0x77777777; c[6] = 0x77777777; c[7] = 0x77777777;
    func(c, a, b);
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X, \n", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X \n", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X\r\n\n", c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7] );


    a[0] = 0xF0000000; a[1] = 0x00000000; a[2] = 0x00000000; a[3] = 0x00000000; a[4] = 0x00000000; a[5] = 0x00000000; a[6] = 0x00000000; a[7] = 0x00000000;
    b[0] = 0x00000000; b[1] = 0xF0000000; b[2] = 0x00000000; b[3] = 0x00000000; b[4] = 0x00000000; b[5] = 0x00000000; b[6] = 0x00000000; b[7] = 0x00000000;
    c[0] = 0x77777777; c[1] = 0x77777777; c[2] = 0x77777777; c[3] = 0x77777777; c[4] = 0x77777777; c[5] = 0x77777777; c[6] = 0x77777777; c[7] = 0x77777777;
    func(c, a, b);
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X, \n", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X \n", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X\r\n\n", c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7] );


    a[0] = 0x00000000; a[1] = 0x00000000; a[2] = 0x00000000; a[3] = 0x00000000; a[4] = 0x00000000; a[5] = 0x00000000; a[6] = 0x00000000; a[7] = 0x00000000;
    b[0] = 0xF000000; b[1] = 0x00000000; b[2] = 0x00000000; b[3] = 0x00000000; b[4] = 0x00000000; b[5] = 0x00000000; b[6] = 0x00000000; b[7] = 0x00000000;
    c[0] = 0x77777777; c[1] = 0x77777777; c[2] = 0x77777777; c[3] = 0x77777777; c[4] = 0x77777777; c[5] = 0x77777777; c[6] = 0x77777777; c[7] = 0x77777777;
    func(c, a, b);
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X, \n", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X \n", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X\r\n\n", c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7] );


    a[0] = 0x00000000; a[1] = 0x00000000; a[2] = 0x00000000; a[3] = 0x00000000; a[4] = 0x00000000; a[5] = 0x00000000; a[6] = 0x00000000; a[7] = 0x00000000;
    b[0] = 0xF0000000; b[1] = 0x00000000; b[2] = 0x00000000; b[3] = 0x00000000; b[4] = 0x00000000; b[5] = 0x00000000; b[6] = 0x00000000; b[7] = 0x00000000;
    c[0] = 0x77777777; c[1] = 0x77777777; c[2] = 0x77777777; c[3] = 0x77777777; c[4] = 0x77777777; c[5] = 0x77777777; c[6] = 0x77777777; c[7] = 0x77777777;
    func(c, a, b);
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X, \n", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X \n", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7] );
    printf( "0x%08X%08X%08X%08X%08X%08X%08X%08X\r\n\n", c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7] );

    return 0;
}