Add mul instruction

4 files changed, 49 insertions, 0 deletions

diff --git a/evaluator.cpp b/evaluator.cpp
index 954a488..0d50b98 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -91,3 +91,21 @@ add_evaluator::evaluate(
 	new_val->set_value(l->m_value + r->m_value);
 	return new_val;
 }
+
+mul_evaluator::mul_evaluator() :
+	evaluator("*")
+	{ }
+
+value *
+mul_evaluator::evaluate(
+	float_value * l,
+	float_value * r)
+{
+	float_value * new_val;
+	if (!l || !r || !l->m_has_value || !r->m_has_value) {
+		return default_evaluate(l,r);
+	}
+
+	new_val = new float_value(l->m_value * r->m_value);
+	return new_val;
+}
diff --git a/evaluator.h b/evaluator.h
index 26594f0..2dd0c70 100644
--- a/evaluator.h
+++ b/evaluator.h
@@ -39,4 +39,13 @@ public:
 		float_value * r);
 
 };
+
+class mul_evaluator : public evaluator {
+public:
+	mul_evaluator();
+	value * evaluate(
+		float_value * l,
+		float_value * r);
+};
+
 #endif //EVALUATOR_H_
diff --git a/instruction.cpp b/instruction.cpp
index 1e7f91b..41d4987 100644
--- a/instruction.cpp
+++ b/instruction.cpp
@@ -72,3 +72,19 @@ mov_instruction::execute(emulator & emulator)
 				   emulator.get_value(m_src_regs[0][i]));
 	}
 }
+
+mul_instruction::mul_instruction(std::vector<register_address> dst) :
+	instruction("MUL", new mul_evaluator(), dst, 2)
+	{ }
+
+void
+mul_instruction::execute(emulator & emulator)
+{
+	unsigned int i;
+	for (i = 0; i < m_dst.size(); i++) {
+		tree_value * val = new tree_value(this->m_evaluator,
+				  emulator.get_value(m_src_regs[0][i]),
+				  emulator.get_value(m_src_regs[1][i]));
+		emulator.set_value(m_dst[i], val);
+	}
+}
diff --git a/instruction.h b/instruction.h
index a41392b..10c61b9 100644
--- a/instruction.h
+++ b/instruction.h
@@ -49,4 +49,10 @@ public:
 	void execute(emulator & emulator);
 };
 
+class mul_instruction : public instruction {
+public:
+	mul_instruction(std::vector<register_address> dst);
+	void execute(emulator & emulator);
+};
+
 #endif //INSTRUCTION_H_