diff options
author | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
commit | 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc (patch) | |
tree | 68c3dbf3f2c6fd5d49777def9914d77b5cd4589d /newlib/libm/math/wf_sqrt.c | |
parent | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (diff) |
import newlib-2000-02-17 snapshot
Diffstat (limited to 'newlib/libm/math/wf_sqrt.c')
-rw-r--r-- | newlib/libm/math/wf_sqrt.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/newlib/libm/math/wf_sqrt.c b/newlib/libm/math/wf_sqrt.c new file mode 100644 index 000000000..6e792c923 --- /dev/null +++ b/newlib/libm/math/wf_sqrt.c @@ -0,0 +1,72 @@ +/* wf_sqrt.c -- float version of w_sqrt.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 sqrtf(x) + */ + +#include "fdlibm.h" +#include <errno.h> + +#ifdef __STDC__ + float sqrtf(float x) /* wrapper sqrtf */ +#else + float sqrtf(x) /* wrapper sqrtf */ + float x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_sqrtf(x); +#else + float z; + struct exception exc; + z = __ieee754_sqrtf(x); + if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; + if(x<(float)0.0) { + /* sqrtf(negative) */ + exc.type = DOMAIN; + exc.name = "sqrtf"; + exc.err = 0; + exc.arg1 = exc.arg2 = (double)x; + if (_LIB_VERSION == _SVID_) + exc.retval = 0.0; + else + exc.retval = 0.0/0.0; + 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 sqrt(double x) +#else + double sqrt(x) + double x; +#endif +{ + return (double) sqrtf((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |