diff options
author | Christopher Faylor <cgf@redhat.com> | 2000-02-17 19:39:46 +0000 |
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committer | Christopher Faylor <cgf@redhat.com> | 2000-02-17 19:39:46 +0000 |
commit | 6d491d8ad9122891d1a48447e8c49702eb678921 (patch) | |
tree | 45619a131b9f211ceca9fce7a866328344bf00ec /newlib/libm/math/wr_lgamma.c | |
parent | bd592806f45307757c24ec3f75bdefe13abfd51f (diff) | |
download | gdb-cvs/SNAPSHOT.tar.gz |
import newlib-2000-02-17 snapshotcvs/SNAPSHOT
Diffstat (limited to 'newlib/libm/math/wr_lgamma.c')
-rw-r--r-- | newlib/libm/math/wr_lgamma.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/newlib/libm/math/wr_lgamma.c b/newlib/libm/math/wr_lgamma.c new file mode 100644 index 00000000000..c59c1cce9af --- /dev/null +++ b/newlib/libm/math/wr_lgamma.c @@ -0,0 +1,77 @@ + +/* @(#)wr_lgamma.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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 double lgamma_r(double x, int *signgamp) + */ + +#include "fdlibm.h" +#include <errno.h> + +#ifndef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double lgamma_r(double x, int *signgamp) /* wrapper lgamma_r */ +#else + double lgamma_r(x,signgamp) /* wrapper lgamma_r */ + double x; int *signgamp; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_lgamma_r(x,signgamp); +#else + double y; + struct exception exc; + y = __ieee754_lgamma_r(x,signgamp); + if(_LIB_VERSION == _IEEE_) return y; + if(!finite(y)&&finite(x)) { +#ifndef HUGE_VAL +#define HUGE_VAL inf + double inf = 0.0; + + SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */ +#endif + exc.name = "lgamma"; + exc.err = 0; + exc.arg1 = exc.arg2 = (double)x; + if (_LIB_VERSION == _SVID_) + exc.retval = HUGE; + else + exc.retval = HUGE_VAL; + if(floor(x)==x&&x<=0.0) { + /* lgamma(-integer) */ + exc.type = SING; + if (_LIB_VERSION == _POSIX_) + errno = EDOM; + else if (!matherr(&exc)) { + errno = EDOM; + } + + } else { + /* lgamma(finite) overflow */ + exc.type = OVERFLOW; + if (_LIB_VERSION == _POSIX_) + errno = ERANGE; + else if (!matherr(&exc)) { + errno = ERANGE; + } + } + if (exc.err != 0) + errno = exc.err; + return exc.retval; + } else + return y; +#endif +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |