- Added clog2 function

- negative numbers can now be displayed in 2's compliment binary

poincare/include/poincare/binary_operation.h

@@ -220,6 +220,14 @@ namespace Poincare
     Expression shallowReduce(ExpressionNode::ReductionContext reductionContext);
   };
 
+  class CeilingLog2 final : public Expression {
+  public:
+    CeilingLog2(const BinaryOperationNode<32> *n) : Expression(n) {}
+    static CeilingLog2 Builder(Expression child1) { return TreeHandle::FixedArityBuilder<CeilingLog2, BinaryOperationNode<32> >({child1}); }
+    static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("clog2", 1, &UntypedBuilderOneChild<CeilingLog2>);
+    Expression shallowReduce(ExpressionNode::ReductionContext reductionContext);
+  };
+
 } // namespace Poincare
 
 #endif

poincare/include/poincare/expression.h

@@ -36,6 +36,7 @@ class Expression : public TreeHandle {
   friend class BitsClearExplicit;
   friend class BitSet;
   friend class Ceiling;
+  friend class CeilingLog2;
   friend class CommonLogarithm;
   template<typename T>
   friend class ComplexNode;

poincare/include/poincare/expression_node.h

@@ -65,6 +65,7 @@ public:
     BinomialCoefficient,
     BinomPDF,
     Ceiling,
+    CeilingLog2,
     ComplexArgument,
     Conjugate,
     Derivative,

poincare/include/poincare/integer.h

@@ -169,6 +169,7 @@ public:
   static Integer LogicalBitFlip(const Integer &a, const Integer &bit);
   static Integer Truncate(const Integer &a, const Integer &num_bits);
   static Integer TwosComplementToBits(const Integer &a, const Integer &num_bits);
+  static Integer CeilingLog2(const Integer &a);
 
   // Derived expression builder
   static Expression CreateMixedFraction(const Integer & num, const Integer & denom);