[RobotCrack]

In need little bit help !
What

PHP Code


<?php 
TEST 


instruction equivalent in C or Higher level language ?

[webdev77]

You don't need the test instruction in higher level languages because there are better ways to write the code. It's a bitwise and operation, so you can implement that if you wish. Truly, there is no direct equivalent to my knowledge, but there are many easy ways to achieve the same result.

[RobotCrack]

You don't need the test instruction in higher level languages because there are better ways to write the code. It's a bitwise and operation, so you can implement that if you wish. Truly, there is no direct equivalent to my knowledge, but there are many easy ways to achieve the same result.

Thanks. Appreciate it!

[Masm4ever]

Code

include \masm32\include\masm32rt.inc

.code
start:
  mov ebx, 15    ; 1+2+4+8
  .if ebx & 4
    print "test 4 succeeded", 13, 10
  .else
    print "test 4 failed", 13, 10
  .endif
  .if ebx & 16
    print "test 16 succeeded", 13, 10
  .else
    print "test 16 failed", 13, 10
  .endif
  inkey "that was easy with Masm32, right?"
  exit

end start

Output:

Code

test 4 succeeded
test 16 failed

Now the same in C:

Code

#include <stdio.h>
#include <conio.h>

#pragma comment(linker, "/subsystem:console" )

int main(void) {
  int ebx=15;
  if (ebx & 4)
    printf("test 4 succeeded\n");
  else
    printf("test 4 failed\n");

  if (ebx & 16)
    printf("test 16 succeeded\n");
  else
    printf("test 16 failed\n");

    _getch();
}

Some stupid brackets more but otherwise pretty much the same.

P.S.: If you prefer "pure" assembler, you can use test ebx, 4:

Code

test ebx, 4
  .if !Zero?
    print "test 4 succeeded", 13, 10
  .else
    print "test 4 failed", 13, 10
  .endif

[movsx]

In need little bit help !
What

PHP Code


<?php 
TEST 


instruction equivalent in C or Higher level language ?

You don't need to worry about that, the compiler does.

C is modeled as an 'abstract machine'

[electricalengineering]

Test operation:

if ( !(me & you) ) //where me and you == 0
{

}

equivalence:

test eax, eax ; where eax is 0.
;zf = 1
je ...