diff --git a/src/Kernel/Mnemonics/_dadd.php b/src/Kernel/Mnemonics/_dadd.php
@@ -11,8 +11,8 @@ final class _dadd implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::add($value1, $value2));
    }

diff --git a/src/Kernel/Mnemonics/_dmul.php b/src/Kernel/Mnemonics/_dmul.php
@@ -11,8 +11,8 @@ final class _dmul implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::multiply($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_dsub.php b/src/Kernel/Mnemonics/_dsub.php
@@ -11,8 +11,8 @@ final class _dsub implements OperationInterface

    public function execute(): void
    {
-        $leftValue = $this->getStack();
        $rightValue = $this->getStack();

        $this->pushStack(BinaryTool::sub($leftValue, $rightValue, 8));
    }

diff --git a/src/Kernel/Mnemonics/_iadd.php b/src/Kernel/Mnemonics/_iadd.php
@@ -11,8 +11,8 @@ final class _iadd implements OperationInterface

    public function execute(): void
    {
-        $leftValue = $this->getStack();
        $rightValue = $this->getStack();

        $this->pushStack(BinaryTool::add($leftValue, $rightValue));
    }

diff --git a/src/Kernel/Mnemonics/_if_acmpeq.php b/src/Kernel/Mnemonics/_if_acmpeq.php
@@ -13,8 +13,8 @@ public function execute(): void
    {
        $offset = $this->readShort();

-        $leftOperand = $this->getStack();
        $rightOperand = $this->getStack();

        if ($leftOperand === $rightOperand) {
            $this->setOffset($this->getProgramCounter() + $offset);

diff --git a/src/Kernel/Mnemonics/_if_acmpne.php b/src/Kernel/Mnemonics/_if_acmpne.php
@@ -13,8 +13,8 @@ public function execute(): void
    {
        $offset = $this->readShort();

-        $leftOperand = $this->getStack();
        $rightOperand = $this->getStack();

        if ($leftOperand !== $rightOperand) {
            $this->setOffset($this->getProgramCounter() + $offset);

diff --git a/src/Kernel/Mnemonics/_if_icmpgt.php b/src/Kernel/Mnemonics/_if_icmpgt.php
@@ -13,10 +13,10 @@ public function execute(): void
    {
        $offset = $this->readShort();

-        $leftOperand = $this->getStack();
        $rightOperand = $this->getStack();

-        if ($leftOperand < $rightOperand) {
            $this->setOffset($this->getProgramCounter() + $offset);
        }
    }

diff --git a/src/Kernel/Mnemonics/_if_icmplt.php b/src/Kernel/Mnemonics/_if_icmplt.php
@@ -13,10 +13,10 @@ public function execute(): void
    {
        $offset = $this->readShort();

-        $leftOperand = $this->getStack();
        $rightOperand = $this->getStack();

-        if ($rightOperand < $leftOperand) {
            $this->setOffset($this->getProgramCounter() + $offset);
        }
    }

diff --git a/src/Kernel/Mnemonics/_if_icmpne.php b/src/Kernel/Mnemonics/_if_icmpne.php
@@ -13,8 +13,8 @@ public function execute(): void
    {
        $offset = $this->readShort();

-        $leftOperand = $this->getStack();
        $rightOperand = $this->getStack();

        if ($leftOperand != $rightOperand) {
            $this->setOffset($this->getProgramCounter() + $offset);

diff --git a/src/Kernel/Mnemonics/_imul.php b/src/Kernel/Mnemonics/_imul.php
@@ -11,8 +11,8 @@ final class _imul implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::multiply($value1, $value2, 4));
    }

diff --git a/src/Kernel/Mnemonics/_ior.php b/src/Kernel/Mnemonics/_ior.php
@@ -11,8 +11,8 @@ final class _ior implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::orBits($value1, $value2, 4));
    }

diff --git a/src/Kernel/Mnemonics/_ishl.php b/src/Kernel/Mnemonics/_ishl.php
@@ -11,8 +11,8 @@ final class _ishl implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::shiftLeft($value1, $value2));
    }

diff --git a/src/Kernel/Mnemonics/_isub.php b/src/Kernel/Mnemonics/_isub.php
@@ -11,8 +11,8 @@ final class _isub implements OperationInterface

    public function execute(): void
    {
-        $leftValue = $this->getStack();
        $rightValue = $this->getStack();

        $this->pushStack(BinaryTool::sub($leftValue, $rightValue, 4));
    }

diff --git a/src/Kernel/Mnemonics/_iushr.php b/src/Kernel/Mnemonics/_iushr.php
@@ -11,8 +11,8 @@ final class _iushr implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::unsignedShiftRight($value1, $value2, 4));
    }

diff --git a/src/Kernel/Mnemonics/_ixor.php b/src/Kernel/Mnemonics/_ixor.php
@@ -11,8 +11,8 @@ final class _ixor implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::xorBits($value1, $value2, 4));
    }

diff --git a/src/Kernel/Mnemonics/_land.php b/src/Kernel/Mnemonics/_land.php
@@ -11,8 +11,8 @@ final class _land implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::andBits($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_lmul.php b/src/Kernel/Mnemonics/_lmul.php
@@ -11,8 +11,8 @@ final class _lmul implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::multiply($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_lor.php b/src/Kernel/Mnemonics/_lor.php
@@ -11,8 +11,8 @@ final class _lor implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::orBits($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_lshl.php b/src/Kernel/Mnemonics/_lshl.php
@@ -11,8 +11,8 @@ final class _lshl implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::shiftLeft($value1, $value2));
    }

diff --git a/src/Kernel/Mnemonics/_lshr.php b/src/Kernel/Mnemonics/_lshr.php
@@ -11,8 +11,8 @@ final class _lshr implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::shiftRight($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_lsub.php b/src/Kernel/Mnemonics/_lsub.php
@@ -11,8 +11,8 @@ final class _lsub implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::sub($value1, $value2, 8));
    }

diff --git a/src/Kernel/Mnemonics/_lushr.php b/src/Kernel/Mnemonics/_lushr.php
@@ -11,8 +11,8 @@ final class _lushr implements OperationInterface

    public function execute(): void
    {
-        $value1 = $this->getStack();
        $value2 = $this->getStack();

        $this->pushStack(BinaryTool::unsignedShiftRight($value1, $value2, 8));
    }

diff --git a/tests/BinaryOperatorTest.php b/tests/BinaryOperatorTest.php
@@ -0,0 +1,85 @@