diff options
Diffstat (limited to 'newlib/libm/math/wf_atan2.c')
| -rw-r--r-- | newlib/libm/math/wf_atan2.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/newlib/libm/math/wf_atan2.c b/newlib/libm/math/wf_atan2.c new file mode 100644 index 00000000000..069a7ca13ad --- /dev/null +++ b/newlib/libm/math/wf_atan2.c @@ -0,0 +1,71 @@ +/* wf_atan2.c -- float version of w_atan2.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. + * ==================================================== + * + */ + +/* + * wrapper atan2f(y,x) + */ + +#include "fdlibm.h" +#include <errno.h> + +#ifdef __STDC__ + float atan2f(float y, float x) /* wrapper atan2f */ +#else + float atan2f(y,x) /* wrapper atan2 */ + float y,x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_atan2f(y,x); +#else + float z; + struct exception exc; + z = __ieee754_atan2f(y,x); + if(_LIB_VERSION == _IEEE_||isnanf(x)||isnanf(y)) return z; + if(x==(float)0.0&&y==(float)0.0) { + /* atan2f(+-0,+-0) */ + exc.arg1 = y; + exc.arg2 = x; + exc.err = 0; + exc.type = DOMAIN; + exc.name = "atan2f"; + exc.retval = 0.0; + if(_LIB_VERSION == _POSIX_) + errno = EDOM; + else if (!matherr(&exc)) { + errno = EDOM; + } + if (exc.err != 0) + errno = exc.err; + return (float)exc.retval; + } else + return z; +#endif +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double atan2(double y, double x) +#else + double atan2(y,x) + double y,x; +#endif +{ + return (double) atan2f((float) y, (float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |