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Diffstat (limited to 'lib/msun/src/w_log10.c')
-rw-r--r-- | lib/msun/src/w_log10.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/msun/src/w_log10.c b/lib/msun/src/w_log10.c new file mode 100644 index 0000000..d3c1f5a --- /dev/null +++ b/lib/msun/src/w_log10.c @@ -0,0 +1,46 @@ +/* @(#)w_log10.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. + * ==================================================== + */ + +#ifndef lint +static char rcsid[] = "$Id: w_log10.c,v 1.4 1994/08/10 20:35:15 jtc Exp $"; +#endif + +/* + * wrapper log10(X) + */ + +#include "math.h" +#include "math_private.h" + + +#ifdef __STDC__ + double log10(double x) /* wrapper log10 */ +#else + double log10(x) /* wrapper log10 */ + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_log10(x); +#else + double z; + z = __ieee754_log10(x); + if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; + if(x<=0.0) { + if(x==0.0) + return __kernel_standard(x,x,18); /* log10(0) */ + else + return __kernel_standard(x,x,19); /* log10(x<0) */ + } else + return z; +#endif +} |