fgetexcptflg.c 1.1 KB

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  1. /* Store current representation for exceptions.
  2. Copyright (C) 2001-2017 Free Software Foundation, Inc.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, see
  13. <http://www.gnu.org/licenses/>. */
  14. #include <fenv.h>
  15. int
  16. fegetexceptflag (fexcept_t *flagp, int excepts)
  17. {
  18. fexcept_t temp;
  19. unsigned int mxscr;
  20. /* Get the current exceptions for the x87 FPU and SSE unit. */
  21. __asm__ ("fnstsw %0\n"
  22. "stmxcsr %1" : "=m" (*&temp), "=m" (*&mxscr));
  23. *flagp = (temp | mxscr) & FE_ALL_EXCEPT & excepts;
  24. /* Success. */
  25. return 0;
  26. }