toolkit/xre/nsSigHandlers.h

   1 /* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is mozilla.org code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  *   Mozilla Corp
  19  * Portions created by the Initial Developer are Copyright (C) 2009
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *  Andreas Gal <gal@uci.edu>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either the GNU General Public License Version 2 or later (the "GPL"), or
  27  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
  29  * of those above. If you wish to allow use of your version of this file only
  30  * under the terms of either the GPL or the LGPL, and not to allow others to
  31  * use your version of this file under the terms of the MPL, indicate your
  32  * decision by deleting the provisions above and replace them with the notice
  33  * and other provisions required by the GPL or the LGPL. If you do not delete
  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__i386) || defined(__amd64__)
  40
  41 /*
  42  * x87 FPU Control Word:
  43  *
  44  * 0 -> IM  Invalid Operation
  45  * 1 -> DM  Denormalized Operand
  46  * 2 -> ZM  Zero Divide
  47  * 3 -> OM  Overflow
  48  * 4 -> UM  Underflow
  49  * 5 -> PM  Precision
  50  */
  51 #define FPU_EXCEPTION_MASK 0x3f
  52
  53 /*
  54  * x86 FPU Status Word:
  55  *
  56  * 0..5  ->      Exception flags  (see x86 FPU Control Word)
  57  * 6     -> SF   Stack Fault
  58  * 7     -> ES   Error Summary Status
  59  */
  60 #define FPU_STATUS_FLAGS 0xff
  61
  62 /*
  63  * MXCSR Control and Status Register:
  64  *
  65  * 0..5  ->      Exception flags (see x86 FPU Control Word)
  66  * 6     -> DAZ  Denormals Are Zero
  67  * 7..12 ->      Exception mask (see x86 FPU Control Word)
  68  */
  69 #define SSE_STATUS_FLAGS   FPU_EXCEPTION_MASK
  70 #define SSE_EXCEPTION_MASK (FPU_EXCEPTION_MASK << 7)
  71
  72 #endif