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/* @(#)k_standard.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.
* ====================================================
*
*/
#include "fdlibm.h"
#include <errno.h>
#ifndef _USE_WRITE
#include <stdio.h> /* fputs(), stderr */
#define WRITE2(u,v) fputs(u, stderr)
#else /* !defined(_USE_WRITE) */
#include <unistd.h> /* write */
#define WRITE2(u,v) write(2, u, v)
#undef fflush
#endif /* !defined(_USE_WRITE) */
#ifdef __STDC__
static const double zero = 0.0; /* used as const */
#else
static double zero = 0.0; /* used as const */
#endif
/*
* POSIX Standard conformance on exception cases.
* Mapping:
* 1 -- acos(|x|>1)
* 2 -- asin(|x|>1)
* 3 -- atan2(+-0,+-0)
* 4 -- hypot overflow
* 5 -- cosh overflow
* 6 -- exp overflow
* 7 -- exp underflow
* 8 -- y0(0)
* 9 -- y0(-ve)
* 10-- y1(0)
* 11-- y1(-ve)
* 12-- yn(0)
* 13-- yn(-ve)
* 14-- lgamma(finite) overflow
* 15-- lgamma(-integer)
* 16-- log(0)
* 17-- log(x<0)
* 18-- log10(0)
* 19-- log10(x<0)
* 20-- pow(0.0,0.0)
* 21-- pow(x,y) overflow
* 22-- pow(x,y) underflow
* 23-- pow(0,negative)
* 24-- pow(neg,non-integral)
* 25-- sinh(finite) overflow
* 26-- sqrt(negative)
* 27-- fmod(x,0)
* 28-- remainder(x,0)
* 29-- acosh(x<1)
* 30-- atanh(|x|>1)
* 31-- atanh(|x|=1)
* 32-- scalb overflow
* 33-- scalb underflow
* 34-- j0(|x|>X_TLOSS)
* 35-- y0(x>X_TLOSS)
* 36-- j1(|x|>X_TLOSS)
* 37-- y1(x>X_TLOSS)
* 38-- jn(|x|>X_TLOSS, n)
* 39-- yn(x>X_TLOSS, n)
* 40-- gamma(finite) overflow
* 41-- gamma(-integer)
* 42-- pow(NaN,0.0)
*/
#ifdef __STDC__
double __kernel_standard(double x, double y, int type)
#else
double __kernel_standard(x,y,type)
double x,y; int type;
#endif
{
double retval = 0.0;
#ifndef HUGE_VAL /* this is the only routine that uses HUGE_VAL */
#define HUGE_VAL inf
double inf = 0.0;
SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */
#endif
#ifdef _USE_WRITE
/* (void) fflush(_stdout_r(p)); */
#endif
switch(type) {
case 1:
case 101:
/* acos(|x|>1) */
retval = zero;
errno = EDOM;
break;
case 2:
case 102:
/* asin(|x|>1) */
retval = zero;
errno = EDOM;
break;
case 3:
case 103:
/* atan2(+-0,+-0) */
retval = zero;
errno = EDOM;
break;
case 4:
case 104:
/* hypot(finite,finite) overflow */
retval = HUGE_VAL;
errno = ERANGE;
break;
case 5:
case 105:
/* cosh(finite) overflow */
retval = HUGE_VAL;
errno = ERANGE;
break;
case 6:
case 106:
/* exp(finite) overflow */
retval = HUGE_VAL;
errno = ERANGE;
break;
case 7:
case 107:
/* exp(finite) underflow */
retval = zero;
errno = ERANGE;
break;
case 8:
case 108:
/* y0(0) = -inf */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 9:
case 109:
/* y0(x<0) = NaN */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 10:
case 110:
/* y1(0) = -inf */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 11:
case 111:
/* y1(x<0) = NaN */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 12:
case 112:
/* yn(n,0) = -inf */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 13:
case 113:
/* yn(x<0) = NaN */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 14:
case 114:
/* lgamma(finite) overflow */
retval = HUGE_VAL;
errno = ERANGE;
break;
case 15:
case 115:
/* lgamma(-integer) or lgamma(0) */
retval = HUGE_VAL;
errno = EDOM;
break;
case 16:
case 116:
/* log(0) */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 17:
case 117:
/* log(x<0) */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 18:
case 118:
/* log10(0) */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 19:
case 119:
/* log10(x<0) */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 20:
case 120:
/* pow(0.0,0.0) */
/* Not an error. */
retval = 1.0;
break;
case 21:
case 121:
/* pow(x,y) overflow */
retval = HUGE_VAL;
y *= 0.5;
if(x<zero&&rint(y)!=y)
retval = -HUGE_VAL;
errno = ERANGE;
break;
case 22:
case 122:
/* pow(x,y) underflow */
retval = zero;
errno = ERANGE;
break;
case 23:
case 123:
/* 0**neg */
retval = -HUGE_VAL;
errno = EDOM;
break;
case 24:
case 124:
/* neg**non-integral */
retval = zero/zero;
errno = EDOM;
break;
case 25:
case 125:
/* sinh(finite) overflow */
retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
errno = ERANGE;
break;
case 26:
case 126:
/* sqrt(x<0) */
retval = zero/zero;
errno = EDOM;
break;
case 27:
case 127:
/* fmod(x,0) */
retval = zero/zero;
errno = EDOM;
break;
case 28:
case 128:
/* remainder(x,0) */
retval = zero/zero;
errno = EDOM;
break;
case 29:
case 129:
/* acosh(x<1) */
retval = zero/zero;
errno = EDOM;
break;
case 30:
case 130:
/* atanh(|x|>1) */
retval = zero/zero;
errno = EDOM;
break;
case 31:
case 131:
/* atanh(|x|=1) */
retval = x/zero; /* sign(x)*inf */
errno = EDOM;
break;
case 32:
case 132:
/* scalb overflow */
retval = x > zero ? HUGE_VAL : -HUGE_VAL;
errno = ERANGE;
break;
case 33:
case 133:
/* scalb underflow */
retval = copysign(zero,x);
errno = ERANGE;
break;
case 34:
case 134:
/* j0(|x|>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 35:
case 135:
/* y0(x>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 36:
case 136:
/* j1(|x|>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 37:
case 137:
/* y1(x>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 38:
case 138:
/* jn(|x|>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 39:
case 139:
/* yn(x>X_TLOSS) */
retval = zero;
errno = ERANGE;
break;
case 40:
case 140:
/* gamma(finite) overflow */
retval = HUGE_VAL;
errno = ERANGE;
break;
case 41:
case 141:
/* gamma(-integer) or gamma(0) */
retval = HUGE_VAL;
errno = EDOM;
break;
case 42:
case 142:
/* pow(NaN,0.0) */
/* Not an error. */
retval = 1.0;
break;
}
return retval;
}
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