VirtualMachine: Add modulo operator

Author: adazem009

docs/Virtual machine.md

@@ -89,6 +89,7 @@ OP_LOOP_END
 - \link libscratchcpp::vm::OP_SUBTRACT OP_SUBTRACT \endlink
 - \link libscratchcpp::vm::OP_MULTIPLY OP_MULTIPLY \endlink
 - \link libscratchcpp::vm::OP_DIVIDE OP_DIVIDE \endlink
+- \link libscratchcpp::vm::OP_MOD OP_MOD \endlink
 
 ### Relational operators
 - \link libscratchcpp::vm::OP_GREATER_THAN OP_GREATER_THAN \endlink

src/engine/virtualmachine.cpp

@@ -106,6 +106,7 @@ unsigned int *VirtualMachine::run(unsigned int *pos)
         &&do_subtract,
         &&do_multiply,
         &&do_divide,
+        &&do_mod,
         &&do_random,
         &&do_greater_than,
         &&do_less_than,
@@ -233,6 +234,12 @@ unsigned int *VirtualMachine::run(unsigned int *pos)
     FREE_REGS(1);
     DISPATCH();
 
+do_mod:
+    REPLACE_RET_VALUE(*READ_REG(0, 2), 2);
+    READ_REG(0, 2)->mod(*READ_REG(1, 2));
+    FREE_REGS(1);
+    DISPATCH();
+
 do_random:
     REPLACE_RET_VALUE(randint<long>(READ_REG(0, 2)->toDouble(), READ_REG(1, 2)->toDouble()), 2);
     FREE_REGS(1);

src/engine/virtualmachine.h

@@ -32,6 +32,7 @@ enum Opcode
     OP_SUBTRACT,         /*!< Subtracts the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
     OP_MULTIPLY,         /*!< Multiplies the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
     OP_DIVIDE,           /*!< Divides the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
+    OP_MOD,              /*!< Calculates module of the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
     OP_RANDOM,           /*!< Generates a random value in the range stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
     OP_GREATER_THAN,     /*!< Compares (>) the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
     OP_LESS_THAN,        /*!< Compares (<) the values stored in the last 2 registers and stores the result in the last registry, deleting the input registers. */
@@ -94,7 +95,7 @@ class LIBSCRATCHCPP_EXPORT VirtualMachine
     private:
         unsigned int *run(unsigned int *pos);
 
-        static inline const unsigned int instruction_arg_count[] = { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
+        static inline const unsigned int instruction_arg_count[] = { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
 
         unsigned int *m_bytecode;
         std::vector<unsigned int> m_bytecodeVector;