Logical Or

SWF Action

Action Category:

Logical and Bitwise

Action Details:

Action Identifier:

Action Structure:

<n.a.>

Action Length:

0 byte(s)

Action Stack:

pop 2 (b), push 1 (b)

Action Operation:

b₁ := pop();
b₂ := pop();
r := b₂ || b_1;
push(r);

Action Flash Version:

See Also:

And

Logical And

Logical Not

XOr

Pop two values, compute the Logical OR and put the Boolean result back on the stack.

b₁	b₂	Result
false	false	false
true	false	true
false	true	true
true	true	true

Logical OR table

IMPORTANT NOTE

If b₂ is the result of a function call and b₁ is true, then that function should not be called. This action, however, is just that. It expects two Boolean, b₁ and b₂, on the stack. So to properly implement the Logical Or in your compiler, you want to test the result of each function call. There is a sample implementation:

call f1       // b1 does not need to come from a function call
duplicate
branch if true, skip
call f2
logical or    // we could also pop just before call f2
label skip: