Add dp_instructionHEADmaster

1 files changed, 35 insertions, 0 deletions

diff --git a/instruction.cpp b/instruction.cpp
index 8febec0..fdc1656 100644
--- a/instruction.cpp
+++ b/instruction.cpp
@@ -139,3 +139,38 @@ min_instruction::min_instruction(std::vector<register_address> dst) :
 max_instruction::max_instruction(std::vector<register_address> dst) :
 	instruction("MAX", new max_evaluator(), dst, 2)
 	{ }
+
+dp_instruction::dp_instruction(
+	unsigned int components,
+	std::vector<register_address> dst)
+	:
+	instruction("DP", NULL, dst, 2),
+	m_components(components)
+	{ }
+
+void
+dp_instruction::execute(emulator & emulator)
+{
+	std::vector<tree_value *> mul;
+	tree_value * dp;
+
+	unsigned int i;
+	int j;
+	for (i = 0; i < m_components; i++) {
+		mul.push_back(new tree_value(
+				new mul_evaluator(),
+				emulator.get_value(m_src_regs[0][i]),
+				emulator.get_value(m_src_regs[1][i])));
+	}
+
+	dp = new tree_value(new add_evaluator(), mul[mul.size() -1],
+							mul[mul.size() -2]);
+	for (j = mul.size() - 3; j >= 0; j--) {
+		dp = new tree_value(new add_evaluator(), mul[j], dp);
+	}
+
+	for (i = 0; i < m_dst.size(); i++) {
+		emulator.queue_write(m_dst[i], dp->clone());
+	}
+	delete dp;
+}