diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_copysignf.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_copysignf.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_copysignf.c b/sysdeps/libm-ieee754/s_copysignf.c new file mode 100644 index 0000000000..a4e84e5397 --- /dev/null +++ b/sysdeps/libm-ieee754/s_copysignf.c @@ -0,0 +1,42 @@ +/* s_copysignf.c -- float version of s_copysign.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * 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. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: s_copysignf.c,v 1.4 1995/05/10 20:46:59 jtc Exp $"; +#endif + +/* + * copysignf(float x, float y) + * copysignf(x,y) returns a value with the magnitude of x and + * with the sign bit of y. + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ + float __copysignf(float x, float y) +#else + float __copysignf(x,y) + float x,y; +#endif +{ + u_int32_t ix,iy; + GET_FLOAT_WORD(ix,x); + GET_FLOAT_WORD(iy,y); + SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000)); + return x; +} +weak_alias (__copysignf, copysignf) |