s_significand.c 909 B

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  1. /* @(#)s_signif.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. #if defined(LIBM_SCCS) && !defined(lint)
  13. static char rcsid[] = "$NetBSD: s_significand.c,v 1.6 1995/05/10 20:48:11 jtc Exp $";
  14. #endif
  15. /*
  16. * significand(x) computes just
  17. * scalb(x, (double) -ilogb(x)),
  18. * for exercising the fraction-part(F) IEEE 754-1985 test vector.
  19. */
  20. #include "math.h"
  21. #include "math_private.h"
  22. #ifdef __STDC__
  23. double significand(double x)
  24. #else
  25. double significand(x)
  26. double x;
  27. #endif
  28. {
  29. return __ieee754_scalb(x,(double) -ilogb(x));
  30. }
  31. libm_hidden_def(significand)