cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

s_copysign.c (1060B)

      1/* @(#)s_copysign.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#if defined(LIBM_SCCS) && !defined(lint)
     14static const char rcsid[] =
     15    "$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $";
     16#endif
     17
     18/*
     19 * copysign(double x, double y)
     20 * copysign(x,y) returns a value with the magnitude of x and
     21 * with the sign bit of y.
     22 */
     23
     24#include "math_libm.h"
     25#include "math_private.h"
     26
     27libm_hidden_proto(copysign)
     28#ifdef __STDC__
     29     double copysign(double x, double y)
     30#else
     31     double copysign(x, y)
     32     double x, y;
     33#endif
     34{
     35    u_int32_t hx, hy;
     36    GET_HIGH_WORD(hx, x);
     37    GET_HIGH_WORD(hy, y);
     38    SET_HIGH_WORD(x, (hx & 0x7fffffff) | (hy & 0x80000000));
     39    return x;
     40}
     41
     42libm_hidden_def(copysign)