Pop/Push Instruction

I need help with this push pop situation. I'm trying to write an HLA Assembly language program that implements a function which correctly identifies when all four parameters are the same and returns a boolean value in AL (1 when all four values are equal; 0 otherwise).

Here is my code so far:

program same;
#include("stdlib.hhf");
static
w : int16 :=0;
x : int16 :=0;
y : int16 :=0;
z : int16 :=0;
temp : int16;

// Function theSame //
procedure theSame(w:int16; x:int16; y:int16; z:int16); @nodisplay; @noframe;
static
returnAddress : dword;
similar: int16;

begin theSame;
pop(returnAddress);
pop(similar); // Padding - stacking must be 32 bit align
pop(z);
pop(y);
pop(x);
pop(w);
push(returnAddress);

stdout.put( "w = ", w, nl );
stdout.put( "x = ", x, nl );
stdout.put( "y = ", y, nl );
stdout.put( "z = ", z, nl );


stdout.put( "cmp w x ", nl );
mov(w,AX);
cmp(AX,x);
je Equal;
jne Notequal; // (w==x)

stdout.put( "cmp x y ", nl );

mov(x,AX);
cmp(AX,y);
je Equal;
jne Notequal; // (x==y)

stdout.put( "cmp y z ", nl );

mov(y,AX);
cmp(AX,z);
je Equal;
jne Notequal; // (y==z)

stdout.put( "cmp z w ", nl );

mov(z,AX);
cmp(AX,w);
je Equal;
jne Notequal; // (w==z)

Equal:
stdout.put( "equal", nl );
mov(1,AX);
push(similar); // padding
jmp ExitSequence;

Notequal:
stdout.put( "not equal", nl );
mov(0,AX);
push(similar); // padding
jmp ExitSequence;

ExitSequence:
ret();

end theSame;

begin same;
stdout.put("Feed Me W: ");
stdin.get(w);
push(w);
stdout.put("Feed Me X: ");
stdin.get(x);
push(x);
stdout.put("Feed Me Y: ");
stdin.get(y);
push(y);
stdout.put("Feed Me Z: ");
stdin.get(z);
push(z);

call theSame;
cmp(AX, 1);
je YESEQUAL;
jmp NOEQUAL;

YESEQUAL:
stdout.put("True", nl);
jmp EndProgram;


NOEQUAL:
stdout.put("False", nl);
jmp EndProgram;

stdout.newln();
EndProgram:

end same;

However, the output came out to this:

Input:

Feed me W: 8
Feed me X: 7
Feed me Y: 6
Feed me Z: 5

Output:

W: -165
X: 8
Y: 7
Z: 6
cmp w x
not equal

Is there a reason why it's the same value to each other? Confuse on how push and pop works. Thank you.

pop(similar); // Padding - stacking must be 32 bit align

Apparently you need to remove this pop(similar) instruction. If you leave it, it obtains the value of the z argument. And makes w get garbage from the stack! Don't forget to also remove the push(similar) instructions.

Layout of your stack on entry:

x  x  5  6  7  8  -165
----
^     ^  ^  ^  ^
|     z  y  x  w  all 4 words
dword return address

pop(returnAddress);
pop(z);
pop(y);
pop(x);
pop(w);
push(returnAddress);