Initial import.

T0/OpcodeConst.cs

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+using System;
+using System.Collections.Generic;
+
+class OpcodeConst : Opcode {
+
+	TValue val;
+
+	internal OpcodeConst(TValue val)
+	{
+		this.val = val;
+	}
+
+	internal override void Run(CPU cpu)
+	{
+		cpu.Push(val);
+	}
+
+	internal override Word GetReference(T0Comp ctx)
+	{
+		TPointerXT xt = val.ptr as TPointerXT;
+		if (xt == null) {
+			return null;
+		}
+		xt.Resolve(ctx);
+		return xt.Target;
+	}
+
+	internal override ConstData GetDataBlock(T0Comp ctx)
+	{
+		TPointerBlob bp = val.ptr as TPointerBlob;
+		return bp == null ? null : bp.Blob;
+	}
+
+	internal override CodeElement ToCodeElement()
+	{
+		if (val.ptr == null) {
+			return new CodeElementUIntInt(1, val.Int);
+		}
+		TPointerXT xt = val.ptr as TPointerXT;
+		if (xt != null) {
+			if (val.x != 0) {
+				throw new Exception(
+					"Cannot compile XT: non-zero offset");
+			}
+			return new CodeElementUIntInt(1, xt.Target.Slot);
+		}
+		TPointerBlob bp = val.ptr as TPointerBlob;
+		if (bp != null) {
+			return new CodeElementUIntInt(1,
+				val.x + bp.Blob.Address);
+		}
+		TPointerExpr cx = val.ptr as TPointerExpr;
+		if (cx != null) {
+			return new CodeElementUIntExpr(1, cx, val.x);
+		}
+		throw new Exception(String.Format(
+			"Cannot embed constant (type = {0})",
+			val.ptr.GetType().FullName));
+	}
+
+	internal override int StackAction {
+		get {
+			return 1;
+		}
+	}
+
+	public override string ToString()
+	{
+		return "const " + val.ToString();
+	}
+}