1 2 /* @(#)s_copysign.c 1.3 95/01/18 */ 3 /* 4 * ==================================================== 5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6 * 7 * Developed at SunSoft, a Sun Microsystems, Inc. business. 8 * Permission to use, copy, modify, and distribute this 9 * software is freely granted, provided that this notice 10 * is preserved. 11 * ==================================================== 12 */ 13 14 /* 15 * copysign(double x, double y) 16 * copysign(x,y) returns a value with the magnitude of x and 17 * with the sign bit of y. 18 */ 19 20 #include "fdlibm.h" 21 22 #ifndef _DOUBLE_IS_32BITS 23 24 #ifdef __STDC__ copysign(double x,double y)25 double copysign(double x, double y) 26 #else 27 double copysign(x,y) 28 double x,y; 29 #endif 30 { 31 uint32_t hx, hy; 32 GET_HIGH_WORD(hx, x); 33 GET_HIGH_WORD(hy, y); 34 SET_HIGH_WORD(x, (hx&0x7fffffff)|(hy&0x80000000)); 35 return x; 36 } 37 #endif /* _DOUBLE_IS_32BITS */ 38