ref: 0f7afa74017abb467aa8091fbd9b6a355c08a39e
dir: /external/SDL2/src/libm/s_copysign.c/
/* * ==================================================== * 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. * ==================================================== */ /* * copysign(double x, double y) * copysign(x,y) returns a value with the magnitude of x and * with the sign bit of y. */ #include "math_libm.h" #include "math_private.h" double copysign(double x, double y) { u_int32_t hx,hy; GET_HIGH_WORD(hx,x); GET_HIGH_WORD(hy,y); SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000)); return x; } libm_hidden_def(copysign)