emulator: Treat uninitialised temp regs as input regs

1 files changed, 9 insertions, 1 deletions

diff --git a/emulator.cpp b/emulator.cpp
index 4c498cc..92a615c 100644
--- a/emulator.cpp
+++ b/emulator.cpp
@@ -57,7 +57,15 @@ emulator::get_value(register_address addr)
 	unsigned int index = addr.to_int();
 
 	switch(addr.m_type) {
-	case REGISTER_TYPE_TEMP: return m_temp_regs[index]->clone();
+	case REGISTER_TYPE_TEMP:
+		if (index < m_temp_regs.size() && m_temp_regs[index]) {
+			return m_temp_regs[index]->clone();
+		} else {
+			/* The Temp register has never been written, which
+			 * means it is actually an input register */
+			return m_input_regs[index]->clone();
+		}
+		break;
 	case REGISTER_TYPE_CONST:
 	{
 		float_value * val = m_const_regs[index];