s_finite.c 733 B

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  1. /* @(#)s_finite.c 5.1 93/09/24 */
  2. /*
  3. * ====================================================
  4. * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  5. *
  6. * Developed at SunPro, a Sun Microsystems, Inc. business.
  7. * Permission to use, copy, modify, and distribute this
  8. * software is freely granted, provided that this notice
  9. * is preserved.
  10. * ====================================================
  11. */
  12. /*
  13. * finite(x) returns 1 is x is finite, else 0;
  14. * no branching!
  15. */
  16. #include "math.h"
  17. #include "math_private.h"
  18. int __finite(double x)
  19. {
  20. int32_t hx;
  21. GET_HIGH_WORD(hx,x);
  22. return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
  23. }
  24. libm_hidden_def(__finite)
  25. weak_alias(__finite,finite)
  26. libm_hidden_weak(finite)