diff options
Diffstat (limited to 'libm/src/s_copysign.c')
-rw-r--r-- | libm/src/s_copysign.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/libm/src/s_copysign.c b/libm/src/s_copysign.c new file mode 100644 index 0000000..21eec34 --- /dev/null +++ b/libm/src/s_copysign.c @@ -0,0 +1,31 @@ + +/* @(#)s_copysign.c 1.3 95/01/18 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunSoft, 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 "fdlibm.h" + +#ifdef __STDC__ + double copysign(double x, double y) +#else + double copysign(x,y) + double x,y; +#endif +{ + __HI(x) = (__HI(x)&0x7fffffff)|(__HI(y)&0x80000000); + return x; +} |