2 // ArithmeticInstruction.cs:
4 // Authors: Marek Safar (marek.safar@gmail.com)
6 // Copyright 2014 Xamarin Inc
8 // Permission is hereby granted, free of charge, to any person obtaining
9 // a copy of this software and associated documentation files (the
10 // "Software"), to deal in the Software without restriction, including
11 // without limitation the rights to use, copy, modify, merge, publish,
12 // distribute, sublicense, and/or sell copies of the Software, and to
13 // permit persons to whom the Software is furnished to do so, subject to
14 // the following conditions:
16 // The above copyright notice and this permission notice shall be
17 // included in all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Diagnostics;
31 using Microsoft.Scripting.Runtime;
32 using Microsoft.Scripting.Utils;
34 namespace Microsoft.Scripting.Interpreter {
35 internal abstract class ArithmeticInstruction : Instruction {
37 public override int ConsumedStack { get { return 2; } }
38 public override int ProducedStack { get { return 1; } }
40 protected abstract object Calculate (object l, object r);
42 public override int Run(InterpretedFrame frame) {
43 object l = frame.Data[frame.StackIndex - 2];
44 object r = frame.Data[frame.StackIndex - 1];
45 frame.Data[frame.StackIndex - 2] = Calculate (l, r);