Write a procedure is_little_endian that will return 1 when compiled and run on a

Question

Write a procedure is_little_endian that will return 1 when compiled and run on a little---endian machine, and will return 0 when compiled and run on a big---endian machine. This program should run on any machine, regardless of its word size. You may write the procedure in C or in assembly language.

This is the answer in assembly language

.globl is_little_endian
_is_little_endian:

pushl %ebp
movl %esp,%ebp
movl $1,-4(%ebp)
movb -4(%ebp),%bl
movl $0,%eax
andl %bl,%bl
jz out
movl $1,%eax

out:
popl $1,%ebp
ret


I know that little endian machine puts the least significant byte first but I need some help understanding how this assembly language program works and how it reveals that the machine is a little endian or big endian.

Thanks your a life saver!!!

Explanation / Answer

Dear, Here is the code #include int main()
{
long i = 1;
char * blah = & i;
if(blah[0])
    printf("%d ", 1);
else
    printf("%d ", 0);
return 1;
}

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