354 lines
6.4 KiB
C
354 lines
6.4 KiB
C
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/* @(#)k_standard.c 5.1 93/09/24 */
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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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*/
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#include "fdlibm.h"
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#include <errno.h>
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#ifndef _USE_WRITE
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#include <stdio.h> /* fputs(), stderr */
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#define WRITE2(u,v) fputs(u, stderr)
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#else /* !defined(_USE_WRITE) */
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#include <unistd.h> /* write */
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#define WRITE2(u,v) write(2, u, v)
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#undef fflush
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#endif /* !defined(_USE_WRITE) */
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#ifdef __STDC__
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static const double zero = 0.0; /* used as const */
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#else
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static double zero = 0.0; /* used as const */
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#endif
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/*
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* POSIX Standard conformance on exception cases.
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* Mapping:
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* 1 -- acos(|x|>1)
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* 2 -- asin(|x|>1)
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* 3 -- atan2(+-0,+-0)
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* 4 -- hypot overflow
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* 5 -- cosh overflow
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* 6 -- exp overflow
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* 7 -- exp underflow
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* 8 -- y0(0)
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* 9 -- y0(-ve)
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* 10-- y1(0)
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* 11-- y1(-ve)
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* 12-- yn(0)
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* 13-- yn(-ve)
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* 14-- lgamma(finite) overflow
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* 15-- lgamma(-integer)
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* 16-- log(0)
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* 17-- log(x<0)
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* 18-- log10(0)
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* 19-- log10(x<0)
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* 20-- pow(0.0,0.0)
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* 21-- pow(x,y) overflow
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* 22-- pow(x,y) underflow
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* 23-- pow(0,negative)
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* 24-- pow(neg,non-integral)
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* 25-- sinh(finite) overflow
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* 26-- sqrt(negative)
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* 27-- fmod(x,0)
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* 28-- remainder(x,0)
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* 29-- acosh(x<1)
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* 30-- atanh(|x|>1)
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* 31-- atanh(|x|=1)
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* 32-- scalb overflow
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* 33-- scalb underflow
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* 34-- j0(|x|>X_TLOSS)
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* 35-- y0(x>X_TLOSS)
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* 36-- j1(|x|>X_TLOSS)
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* 37-- y1(x>X_TLOSS)
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* 38-- jn(|x|>X_TLOSS, n)
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* 39-- yn(x>X_TLOSS, n)
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* 40-- gamma(finite) overflow
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* 41-- gamma(-integer)
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* 42-- pow(NaN,0.0)
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*/
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#ifdef __STDC__
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double __kernel_standard(double x, double y, int type)
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#else
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double __kernel_standard(x,y,type)
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double x,y; int type;
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#endif
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{
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double retval = 0.0;
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#ifdef _USE_WRITE
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/* (void) fflush(_stdout_r(p)); */
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#endif
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switch(type) {
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case 1:
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case 101:
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/* acos(|x|>1) */
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retval = zero;
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errno = EDOM;
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break;
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case 2:
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case 102:
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/* asin(|x|>1) */
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retval = zero;
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errno = EDOM;
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break;
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case 3:
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case 103:
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/* atan2(+-0,+-0) */
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retval = zero;
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errno = EDOM;
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break;
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case 4:
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case 104:
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/* hypot(finite,finite) overflow */
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retval = HUGE_VAL;
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errno = ERANGE;
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break;
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case 5:
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case 105:
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/* cosh(finite) overflow */
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retval = HUGE_VAL;
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errno = ERANGE;
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break;
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case 6:
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case 106:
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/* exp(finite) overflow */
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retval = HUGE_VAL;
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errno = ERANGE;
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break;
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case 7:
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case 107:
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/* exp(finite) underflow */
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retval = zero;
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errno = ERANGE;
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break;
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case 8:
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case 108:
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/* y0(0) = -inf */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 9:
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case 109:
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/* y0(x<0) = NaN */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 10:
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case 110:
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/* y1(0) = -inf */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 11:
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case 111:
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/* y1(x<0) = NaN */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 12:
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case 112:
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/* yn(n,0) = -inf */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 13:
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case 113:
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/* yn(x<0) = NaN */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 14:
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case 114:
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/* lgamma(finite) overflow */
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retval = HUGE_VAL;
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errno = ERANGE;
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break;
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case 15:
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case 115:
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/* lgamma(-integer) or lgamma(0) */
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retval = HUGE_VAL;
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errno = EDOM;
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break;
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case 16:
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case 116:
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/* log(0) */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 17:
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case 117:
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/* log(x<0) */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 18:
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case 118:
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/* log10(0) */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 19:
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case 119:
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/* log10(x<0) */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 20:
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case 120:
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/* pow(0.0,0.0) */
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/* Not an error. */
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retval = 1.0;
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break;
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case 21:
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case 121:
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/* pow(x,y) overflow */
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retval = HUGE_VAL;
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y *= 0.5;
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if(x<zero&&rint(y)!=y)
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retval = -HUGE_VAL;
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errno = ERANGE;
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break;
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case 22:
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case 122:
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/* pow(x,y) underflow */
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retval = zero;
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errno = ERANGE;
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break;
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case 23:
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case 123:
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/* 0**neg */
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retval = -HUGE_VAL;
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errno = EDOM;
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break;
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case 24:
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case 124:
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/* neg**non-integral */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 25:
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case 125:
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/* sinh(finite) overflow */
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retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
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errno = ERANGE;
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break;
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case 26:
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case 126:
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/* sqrt(x<0) */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 27:
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case 127:
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/* fmod(x,0) */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 28:
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case 128:
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/* remainder(x,0) */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 29:
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case 129:
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/* acosh(x<1) */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 30:
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case 130:
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/* atanh(|x|>1) */
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retval = zero/zero;
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errno = EDOM;
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break;
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case 31:
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case 131:
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/* atanh(|x|=1) */
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retval = x/zero; /* sign(x)*inf */
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errno = EDOM;
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break;
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case 32:
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case 132:
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/* scalb overflow */
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retval = x > zero ? HUGE_VAL : -HUGE_VAL;
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errno = ERANGE;
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break;
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case 33:
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case 133:
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/* scalb underflow */
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retval = copysign(zero,x);
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errno = ERANGE;
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break;
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case 34:
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case 134:
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/* j0(|x|>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 35:
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case 135:
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/* y0(x>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 36:
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case 136:
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/* j1(|x|>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 37:
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case 137:
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/* y1(x>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 38:
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case 138:
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/* jn(|x|>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 39:
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case 139:
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/* yn(x>X_TLOSS) */
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retval = zero;
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errno = ERANGE;
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break;
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case 40:
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case 140:
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/* gamma(finite) overflow */
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retval = copysign(HUGE_VAL, x);
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errno = ERANGE;
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break;
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case 41:
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case 141:
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/* gamma(-integer) or gamma(0) */
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retval = HUGE_VAL;
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errno = EDOM;
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break;
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case 42:
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case 142:
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/* pow(NaN,0.0) */
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/* Not an error. */
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retval = 1.0;
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break;
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}
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return retval;
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}
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