Fix a bug about the iSCSI DHCP dependency issue.

[mirror_edk2.git] / StdLib / LibC / Math / s_copysign.c

/* @(#)s_copysign.c 5.1 93/09/24 */\r
/*\r
 * ====================================================\r
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.\r
 *\r
 * Developed at SunPro, a Sun Microsystems, Inc. business.\r
 * Permission to use, copy, modify, and distribute this\r
 * software is freely granted, provided that this notice\r
 * is preserved.\r
 * ====================================================\r
 */\r
#include  <LibConfig.h>\r
#include  <sys/EfiCdefs.h>\r
#if defined(LIBM_SCCS) && !defined(lint)\r
__RCSID("$NetBSD: s_copysign.c,v 1.11 2002/05/26 22:01:54 wiz Exp $");\r
#endif\r
\r
/*\r
 * copysign(double x, double y)\r
 * copysign(x,y) returns a value with the magnitude of x and\r
 * with the sign bit of y.\r
 */\r
\r
#include "math.h"\r
#include "math_private.h"\r
\r
double\r
copysign(double x, double y)\r
{\r
  u_int32_t hx,hy;\r
  GET_HIGH_WORD(hx,x);\r
  GET_HIGH_WORD(hy,y);\r
  SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));\r
        return x;\r
}\r