mirror of
https://github.com/autc04/Retro68.git
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139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
/* wf_jn.c -- float version of w_jn.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include "fdlibm.h"
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#include <errno.h>
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#ifdef __STDC__
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float jnf(int n, float x) /* wrapper jnf */
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#else
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float jnf(n,x) /* wrapper jnf */
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float x; int n;
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#endif
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{
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#ifdef _IEEE_LIBM
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return __ieee754_jnf(n,x);
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#else
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float z;
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struct exception exc;
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z = __ieee754_jnf(n,x);
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if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
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if(fabsf(x)>(float)X_TLOSS) {
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/* jnf(|x|>X_TLOSS) */
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exc.type = TLOSS;
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exc.name = "jnf";
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exc.err = 0;
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exc.arg1 = (double)n;
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exc.arg2 = (double)x;
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exc.retval = 0.0;
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if (_LIB_VERSION == _POSIX_)
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errno = ERANGE;
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else if (!matherr(&exc)) {
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errno = ERANGE;
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}
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if (exc.err != 0)
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errno = exc.err;
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return exc.retval;
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} else
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return z;
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#endif
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}
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#ifdef __STDC__
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float ynf(int n, float x) /* wrapper ynf */
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#else
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float ynf(n,x) /* wrapper ynf */
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float x; int n;
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#endif
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{
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#ifdef _IEEE_LIBM
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return __ieee754_ynf(n,x);
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#else
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float z;
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struct exception exc;
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z = __ieee754_ynf(n,x);
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if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
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if(x <= (float)0.0){
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/* ynf(n,0) = -inf or ynf(x<0) = NaN */
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#ifndef HUGE_VAL
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#define HUGE_VAL inf
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double inf = 0.0;
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SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */
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#endif
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = "ynf";
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exc.err = 0;
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exc.arg1 = (double)n;
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exc.arg2 = (double)x;
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if (_LIB_VERSION == _SVID_)
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exc.retval = -HUGE;
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else
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exc.retval = -HUGE_VAL;
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if (_LIB_VERSION == _POSIX_)
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errno = EDOM;
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else if (!matherr(&exc)) {
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errno = EDOM;
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}
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if (exc.err != 0)
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errno = exc.err;
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return (float)exc.retval;
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}
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if(x>(float)X_TLOSS) {
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/* ynf(x>X_TLOSS) */
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exc.type = TLOSS;
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exc.name = "ynf";
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exc.err = 0;
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exc.arg1 = (double)n;
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exc.arg2 = (double)x;
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exc.retval = 0.0;
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if (_LIB_VERSION == _POSIX_)
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errno = ERANGE;
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else if (!matherr(&exc)) {
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errno = ERANGE;
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}
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if (exc.err != 0)
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errno = exc.err;
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return (float)exc.retval;
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} else
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return z;
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#endif
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}
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#ifdef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double jn(int n, double x)
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#else
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double jn(n,x)
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double x; int n;
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#endif
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{
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return (double) jnf(n, (float) x);
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}
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#ifdef __STDC__
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double yn(int n, double x)
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#else
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double yn(n,x)
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double x; int n;
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#endif
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{
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return (double) ynf(n, (float) x);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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