instruction: Add trim_dst_regs()

2 files changed, 11 insertions, 0 deletions

diff --git a/instruction.cpp b/instruction.cpp
index 8509eb6..1e7f91b 100644
--- a/instruction.cpp
+++ b/instruction.cpp
@@ -21,6 +21,16 @@ void instruction::add_src_reg(std::vector<register_address> src_reg)
 	m_src_regs.push_back(src_reg);
 }
 
+void instruction::trim_dst_regs()
+{
+	unsigned int i;
+	for (i = 0; i < m_src_regs.size(); i++){
+		while (m_dst.size() > m_src_regs[i].size()) {
+			m_dst.pop_back();
+		}
+	}
+}
+
 add_instruction::add_instruction(
 	std::vector<register_address> dst,
 	std::vector<register_address> src0,
diff --git a/instruction.h b/instruction.h
index 8e3a201..a41392b 100644
--- a/instruction.h
+++ b/instruction.h
@@ -19,6 +19,7 @@ public:
 		unsigned int src_reg_count);
 	virtual void execute(emulator & emulator) = 0;
 	virtual void add_src_reg(std::vector<register_address> src_reg);
+	virtual void trim_dst_regs();
 
 protected:
 	const char * m_name;