?? feholdexcpt.c
字號:
/* Store current floating-point environment and clear exceptions. Copyright (C) 1997, 1999, 2000, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Christian Boissat <Christian.Boissat@cern.ch>, 1999 The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#include <fenv.h>intfeholdexcept (fenv_t *envp){ fenv_t fpsr; /* Save the current state. */ __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr)); *envp = fpsr; /* Set the trap disable bits. */ fpsr |= FE_ALL_EXCEPT; /* And clear the exception bits. */ fpsr &= ~(fenv_t) (FE_ALL_EXCEPT << 13); __asm__ __volatile__ ("mov.m ar.fpsr=%0" :: "r" (fpsr)); /* Success. */ return 0;}libm_hidden_def (feholdexcept)
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -