toolkit/xre/nsSigHandlers.h

   1 /* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__i386) || defined(__amd64__)
   7
   8 /*
   9  * x87 FPU Control Word:
  10  *
  11  * 0 -> IM  Invalid Operation
  12  * 1 -> DM  Denormalized Operand
  13  * 2 -> ZM  Zero Divide
  14  * 3 -> OM  Overflow
  15  * 4 -> UM  Underflow
  16  * 5 -> PM  Precision
  17  */
  18 #define FPU_EXCEPTION_MASK 0x3f
  19
  20 /*
  21  * x86 FPU Status Word:
  22  *
  23  * 0..5  ->      Exception flags  (see x86 FPU Control Word)
  24  * 6     -> SF   Stack Fault
  25  * 7     -> ES   Error Summary Status
  26  */
  27 #define FPU_STATUS_FLAGS 0xff
  28
  29 /*
  30  * MXCSR Control and Status Register:
  31  *
  32  * 0..5  ->      Exception flags (see x86 FPU Control Word)
  33  * 6     -> DAZ  Denormals Are Zero
  34  * 7..12 ->      Exception mask (see x86 FPU Control Word)
  35  */
  36 #define SSE_STATUS_FLAGS   FPU_EXCEPTION_MASK
  37 #define SSE_EXCEPTION_MASK (FPU_EXCEPTION_MASK << 7)
  38
  39 #endif