URL
https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libm/] [math/] [wf_log10.c] - Rev 226
Go to most recent revision | Compare with Previous | Blame | View Log
/* wf_log10.c -- float version of w_log10.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 log10f(X) */ #include "fdlibm.h" #include <errno.h> #ifdef __STDC__ float log10f(float x) /* wrapper log10f */ #else float log10f(x) /* wrapper log10f */ float x; #endif { #ifdef _IEEE_LIBM return __ieee754_log10f(x); #else float z; struct exception exc; z = __ieee754_log10f(x); if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; if(x<=(float)0.0) { #ifndef HUGE_VAL #define HUGE_VAL inf double inf = 0.0; SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */ #endif exc.name = "log10f"; exc.err = 0; exc.arg1 = exc.arg2 = (double)x; if (_LIB_VERSION == _SVID_) exc.retval = -HUGE; else exc.retval = -HUGE_VAL; if(x==(float)0.0) { /* log10f(0) */ exc.type = SING; if (_LIB_VERSION == _POSIX_) errno = ERANGE; else if (!matherr(&exc)) { errno = ERANGE; } } else { /* log10f(x<0) */ exc.type = DOMAIN; if (_LIB_VERSION == _POSIX_) errno = EDOM; else if (!matherr(&exc)) { errno = EDOM; } exc.retval = nan(""); } if (exc.err != 0) errno = exc.err; return (float)exc.retval; } else return z; #endif } #ifdef _DOUBLE_IS_32BITS #ifdef __STDC__ double log10(double x) #else double log10(x) double x; #endif { return (double) log10f((float) x); } #endif /* defined(_DOUBLE_IS_32BITS) */
Go to most recent revision | Compare with Previous | Blame | View Log