1  /* s_copysignl.c -- long double version of s_copysign.c.
       2   */
       3  
       4  /*
       5   * ====================================================
       6   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       7   *
       8   * Developed at SunPro, a Sun Microsystems, Inc. business.
       9   * Permission to use, copy, modify, and distribute this
      10   * software is freely granted, provided that this notice
      11   * is preserved.
      12   * ====================================================
      13   */
      14  
      15  #if defined (LIBM_SCCS) && ! defined (lint)
      16  static char rcsid[] = "$NetBSD: $";
      17  #endif
      18  
      19  /*
      20   * copysignl(long double x, long double y)
      21   * copysignl(x,y) returns a value with the magnitude of x and
      22   * with the sign bit of y.
      23   */
      24  
      25  #define NO_MATH_REDIRECT
      26  #include <math.h>
      27  #include <math_private.h>
      28  #include <libm-alias-ldouble.h>
      29  #include <math-use-builtins.h>
      30  
      31  _Float128
      32  __copysignl (_Float128 x, _Float128 y)
      33  {
      34  #if USE_COPYSIGNL_BUILTIN
      35    return __builtin_copysignl (x, y);
      36  #else
      37    /* Use generic implementation.  */
      38    uint64_t hx, hy;
      39    GET_LDOUBLE_MSW64 (hx, x);
      40    GET_LDOUBLE_MSW64 (hy, y);
      41    SET_LDOUBLE_MSW64 (x, (hx & 0x7fffffffffffffffULL)
      42  		     | (hy & 0x8000000000000000ULL));
      43    return x;
      44  #endif /* ! USE_COPYSIGNL_BUILTIN  */
      45  }
      46  libm_alias_ldouble (__copysign, copysign)