From 0603295822a8d19e5cec0832c583711ee1cc0634 Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@zdoom.fake>
Date: Sat, 27 Jul 2013 21:35:22 -0500
Subject: [PATCH] Added EmitParamInt to VMFunctionBuilder

---
 src/zscript/vmbuilder.cpp | 22 ++++++++++++++++++++++
 src/zscript/vmbuilder.h   |  1 +
 2 files changed, 23 insertions(+)

diff --git a/src/zscript/vmbuilder.cpp b/src/zscript/vmbuilder.cpp
index c87ff636a..4a3462c4f 100644
--- a/src/zscript/vmbuilder.cpp
+++ b/src/zscript/vmbuilder.cpp
@@ -468,6 +468,28 @@ size_t VMFunctionBuilder::Emit(int opcode, int opabc)
 	return Code.Push(op);
 }
 
+//==========================================================================
+//
+// VMFunctionBuilder :: EmitParamInt
+//
+// Passes a constant integer parameter, using either PARAMI and an immediate
+// value or PARAM and a constant register, as appropriate.
+//
+//==========================================================================
+
+size_t VMFunctionBuilder::EmitParamInt(int value)
+{
+	// Immediates for PARAMI must fit in 24 bits.
+	if (((value << 8) >> 8) == value)
+	{
+		return Emit(OP_PARAMI, value);
+	}
+	else
+	{
+		return Emit(OP_PARAM, 0, REGT_INT | REGT_KONST, GetConstantInt(value));
+	}
+}
+
 //==========================================================================
 //
 // VMFunctionBuilder :: EmitLoadInt
diff --git a/src/zscript/vmbuilder.h b/src/zscript/vmbuilder.h
index 7587d1b20..c15f65739 100644
--- a/src/zscript/vmbuilder.h
+++ b/src/zscript/vmbuilder.h
@@ -36,6 +36,7 @@ public:
 	size_t Emit(int opcode, int opa, int opb, int opc);
 	size_t Emit(int opcode, int opa, VM_SHALF opbc);
 	size_t Emit(int opcode, int opabc);
+	size_t EmitParamInt(int value);
 	size_t EmitLoadInt(int regnum, int value);
 	size_t EmitRetInt(int retnum, bool final, int value);