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__) || \
   7     defined(__i386) || defined(__amd64__)
   8
   9 /*
  10  * x87 FPU Control Word:
  11  *
  12  * 0 -> IM  Invalid Operation
  13  * 1 -> DM  Denormalized Operand
  14  * 2 -> ZM  Zero Divide
  15  * 3 -> OM  Overflow
  16  * 4 -> UM  Underflow
  17  * 5 -> PM  Precision
  18  */
  19 #  define FPU_EXCEPTION_MASK 0x3f
  20
  21 /*
  22  * x86 FPU Status Word:
  23  *
  24  * 0..5  ->      Exception flags  (see x86 FPU Control Word)
  25  * 6     -> SF   Stack Fault
  26  * 7     -> ES   Error Summary Status
  27  */
  28 #  define FPU_STATUS_FLAGS 0xff
  29
  30 /*
  31  * MXCSR Control and Status Register:
  32  *
  33  * 0..5  ->      Exception flags (see x86 FPU Control Word)
  34  * 6     -> DAZ  Denormals Are Zero
  35  * 7..12 ->      Exception mask (see x86 FPU Control Word)
  36  */
  37 #  define SSE_STATUS_FLAGS FPU_EXCEPTION_MASK
  38 #  define SSE_EXCEPTION_MASK (FPU_EXCEPTION_MASK << 7)
  39
  40 #endif