diff -r 000000000000 -r e4d67989cc36 genericopenlibs/cstdlib/LMATH/S_CPYSGN.C --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/genericopenlibs/cstdlib/LMATH/S_CPYSGN.C Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,86 @@ +/* S_CPYSGN.C + * + * Portions Copyright (c) 1993-1999 Nokia Corporation and/or its subsidiary(-ies). + * All rights reserved. + */ + + +/* @(#)s_copysign.c 5.1 93/09/24 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* +FUNCTION +<>, <>---sign of <[y]>, magnitude of <[x]> + +INDEX + copysign +INDEX + copysignf + +ANSI_SYNOPSIS + #include + double copysign (double <[x]>, double <[y]>); + float copysignf (float <[x]>, float <[y]>); + +TRAD_SYNOPSIS + #include + double copysign (<[x]>, <[y]>) + double <[x]>; + double <[y]>; + + float copysignf (<[x]>, <[y]>) + float <[x]>; + float <[y]>; + +DESCRIPTION +<> constructs a number with the magnitude (absolute value) +of its first argument, <[x]>, and the sign of its second argument, +<[y]>. + +<> does the same thing; the two functions differ only in +the type of their arguments and result. + +RETURNS +<> returns a <> with the magnitude of +<[x]> and the sign of <[y]>. +<> returns a <> with the magnitude of +<[x]> and the sign of <[y]>. + +PORTABILITY +<> is not required by either ANSI C or the System V Interface +Definition (Issue 2). + +*/ + +/* + * copysign(double x, double y) + * copysign(x,y) returns a value with the magnitude of x and + * with the sign bit of y. + */ + +#include "FDLIBM.H" + +/** +Constructs a number with the magnitude (absolute value) +of its first argument, x, and the sign of its second argument y. +@return a value with the magnitude of x and with the sign bit of y. +@param x magnitude +@param y sign bit +*/ +EXPORT_C double copysign(double x, double y) __SOFTFP +{ + __uint32_t hx,hy; + GET_HIGH_WORD(hx,x); + GET_HIGH_WORD(hy,y); + SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000)); + return x; +}