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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/native/fdlibm/w_exp.c | |
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Diffstat (limited to 'libjava/classpath/native/fdlibm/w_exp.c')
-rw-r--r-- | libjava/classpath/native/fdlibm/w_exp.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libjava/classpath/native/fdlibm/w_exp.c b/libjava/classpath/native/fdlibm/w_exp.c new file mode 100644 index 000000000..7819ca133 --- /dev/null +++ b/libjava/classpath/native/fdlibm/w_exp.c @@ -0,0 +1,48 @@ + +/* @(#)w_exp.c 1.4 04/04/22 */ +/* + * ==================================================== + * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved. + * + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* + * wrapper exp(x) + */ + +#include "fdlibm.h" + +#ifdef __STDC__ +static const double +#else +static double +#endif +o_threshold= 7.09782712893383973096e+02, /* 0x40862E42, 0xFEFA39EF */ +u_threshold= -7.45133219101941108420e+02; /* 0xc0874910, 0xD52D3051 */ + +#ifdef __STDC__ + double exp(double x) /* wrapper exp */ +#else + double exp(x) /* wrapper exp */ + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_exp(x); +#else + double z; + z = __ieee754_exp(x); + if(_LIB_VERSION == _IEEE_) return z; + if(finite(x)) { + if(x>o_threshold) + return __kernel_standard(x,x,6); /* exp overflow */ + else if(x<u_threshold) + return __kernel_standard(x,x,7); /* exp underflow */ + } + return z; +#endif +} |