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734 lines
19 KiB
734 lines
19 KiB
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/* @(#)k_standard.c 1.3 95/01/18 */
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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 SunSoft, 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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static double zero = 0.0; /* used as const */
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/*
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* Standard conformance (non-IEEE) on exception cases.
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* Mapping:
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* 1 -- ieee_acos(|x|>1)
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* 2 -- ieee_asin(|x|>1)
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* 3 -- ieee_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 -- ieee_y0(0)
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* 9 -- ieee_y0(-ve)
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* 10-- ieee_y1(0)
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* 11-- ieee_y1(-ve)
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* 12-- ieee_yn(0)
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* 13-- ieee_yn(-ve)
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* 14-- ieee_lgamma(finite) overflow
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* 15-- ieee_lgamma(-integer)
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* 16-- ieee_log(0)
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* 17-- ieee_log(x<0)
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* 18-- ieee_log10(0)
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* 19-- ieee_log10(x<0)
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* 20-- ieee_pow(0.0,0.0)
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* 21-- ieee_pow(x,y) overflow
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* 22-- ieee_pow(x,y) underflow
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* 23-- ieee_pow(0,negative)
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* 24-- ieee_pow(neg,non-integral)
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* 25-- ieee_sinh(finite) overflow
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* 26-- ieee_sqrt(negative)
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* 27-- ieee_fmod(x,0)
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* 28-- ieee_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-- ieee_j0(|x|>X_TLOSS)
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* 35-- ieee_y0(x>X_TLOSS)
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* 36-- ieee_j1(|x|>X_TLOSS)
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* 37-- ieee_y1(x>X_TLOSS)
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* 38-- ieee_jn(|x|>X_TLOSS, n)
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* 39-- ieee_yn(x>X_TLOSS, n)
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* 40-- ieee_gamma(finite) overflow
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* 41-- ieee_gamma(-integer)
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* 42-- ieee_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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struct exception exc;
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#ifndef HUGE_VAL /* this is the only routine that uses HUGE_VAL */
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#define HUGE_VAL inf
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double inf = 0.0;
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__HI(inf) = 0x7ff00000; /* set inf to infinite */
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#endif
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#ifdef _USE_WRITE
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(void) fflush(stdout);
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#endif
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exc.arg1 = x;
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exc.arg2 = y;
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switch(type) {
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case 1:
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/* ieee_acos(|x|>1) */
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exc.type = DOMAIN;
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exc.name = "acos";
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exc.retval = zero;
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if (_LIB_VERSION == _POSIX_)
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errno = EDOM;
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else if (!ieee_matherr(&exc)) {
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if(_LIB_VERSION == _SVID_) {
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(void) WRITE2("acos: DOMAIN error\n", 19);
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}
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errno = EDOM;
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}
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break;
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case 2:
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/* ieee_asin(|x|>1) */
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exc.type = DOMAIN;
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exc.name = "asin";
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exc.retval = zero;
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if(_LIB_VERSION == _POSIX_)
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errno = EDOM;
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else if (!ieee_matherr(&exc)) {
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if(_LIB_VERSION == _SVID_) {
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(void) WRITE2("asin: DOMAIN error\n", 19);
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}
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errno = EDOM;
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}
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break;
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case 3:
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/* ieee_atan2(+-0,+-0) */
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exc.arg1 = y;
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exc.arg2 = x;
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exc.type = DOMAIN;
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exc.name = "atan2";
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exc.retval = zero;
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if(_LIB_VERSION == _POSIX_)
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errno = EDOM;
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else if (!ieee_matherr(&exc)) {
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if(_LIB_VERSION == _SVID_) {
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(void) WRITE2("atan2: DOMAIN error\n", 20);
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}
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errno = EDOM;
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}
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break;
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case 4:
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/* ieee_hypot(finite,finite) overflow */
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exc.type = OVERFLOW;
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exc.name = "hypot";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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errno = ERANGE;
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}
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break;
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case 5:
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/* ieee_cosh(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = "cosh";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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errno = ERANGE;
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}
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break;
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case 6:
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/* ieee_exp(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = "exp";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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errno = ERANGE;
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}
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break;
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case 7:
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/* ieee_exp(finite) underflow */
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exc.type = UNDERFLOW;
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exc.name = "exp";
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exc.retval = zero;
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if (_LIB_VERSION == _POSIX_)
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errno = ERANGE;
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else if (!ieee_matherr(&exc)) {
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errno = ERANGE;
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}
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break;
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case 8:
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/* ieee_y0(0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = "y0";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("y0: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 9:
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/* ieee_y0(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = "y0";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("y0: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 10:
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/* ieee_y1(0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = "y1";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("y1: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 11:
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/* ieee_y1(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = "y1";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("y1: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 12:
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/* ieee_yn(n,0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = "yn";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("yn: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 13:
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/* ieee_yn(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = "yn";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("yn: DOMAIN error\n", 17);
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}
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errno = EDOM;
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}
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break;
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case 14:
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/* ieee_lgamma(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = "lgamma";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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errno = ERANGE;
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}
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break;
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case 15:
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/* ieee_lgamma(-integer) or ieee_lgamma(0) */
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exc.type = SING;
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exc.name = "lgamma";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("lgamma: SING error\n", 19);
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}
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errno = EDOM;
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}
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break;
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case 16:
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/* ieee_log(0) */
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exc.type = SING;
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exc.name = "log";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("log: SING error\n", 16);
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}
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errno = EDOM;
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}
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break;
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case 17:
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/* ieee_log(x<0) */
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exc.type = DOMAIN;
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exc.name = "log";
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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 (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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|
(void) WRITE2("log: DOMAIN error\n", 18);
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}
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errno = EDOM;
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}
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break;
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case 18:
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|
/* ieee_log10(0) */
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exc.type = SING;
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exc.name = "log10";
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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 = ERANGE;
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else if (!ieee_matherr(&exc)) {
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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("log10: SING error\n", 18);
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}
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errno = EDOM;
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|
}
|
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break;
|
|
case 19:
|
|
/* ieee_log10(x<0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "log10";
|
|
if (_LIB_VERSION == _SVID_)
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exc.retval = -HUGE;
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|
else
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exc.retval = -HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
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errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
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if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("log10: DOMAIN error\n", 20);
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}
|
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errno = EDOM;
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}
|
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break;
|
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case 20:
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|
/* ieee_pow(0.0,0.0) */
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|
/* error only if _LIB_VERSION == _SVID_ */
|
|
exc.type = DOMAIN;
|
|
exc.name = "pow";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION != _SVID_) exc.retval = 1.0;
|
|
else if (!ieee_matherr(&exc)) {
|
|
(void) WRITE2("pow(0,0): DOMAIN error\n", 23);
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 21:
|
|
/* ieee_pow(x,y) overflow */
|
|
exc.type = OVERFLOW;
|
|
exc.name = "pow";
|
|
if (_LIB_VERSION == _SVID_) {
|
|
exc.retval = HUGE;
|
|
y *= 0.5;
|
|
if(x<zero&&ieee_rint(y)!=y) exc.retval = -HUGE;
|
|
} else {
|
|
exc.retval = HUGE_VAL;
|
|
y *= 0.5;
|
|
if(x<zero&&ieee_rint(y)!=y) exc.retval = -HUGE_VAL;
|
|
}
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 22:
|
|
/* ieee_pow(x,y) underflow */
|
|
exc.type = UNDERFLOW;
|
|
exc.name = "pow";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 23:
|
|
/* 0**neg */
|
|
exc.type = DOMAIN;
|
|
exc.name = "pow";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = zero;
|
|
else
|
|
exc.retval = -HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("pow(0,neg): DOMAIN error\n", 25);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 24:
|
|
/* neg**non-integral */
|
|
exc.type = DOMAIN;
|
|
exc.name = "pow";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = zero;
|
|
else
|
|
exc.retval = zero/zero; /* X/Open allow NaN */
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("neg**non-integral: DOMAIN error\n", 32);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 25:
|
|
/* ieee_sinh(finite) overflow */
|
|
exc.type = OVERFLOW;
|
|
exc.name = "sinh";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = ( (x>zero) ? HUGE : -HUGE);
|
|
else
|
|
exc.retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 26:
|
|
/* ieee_sqrt(x<0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "sqrt";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = zero;
|
|
else
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("sqrt: DOMAIN error\n", 19);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 27:
|
|
/* ieee_fmod(x,0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "fmod";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = x;
|
|
else
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("fmod: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 28:
|
|
/* ieee_remainder(x,0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "remainder";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("remainder: DOMAIN error\n", 24);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 29:
|
|
/* acosh(x<1) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "acosh";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("acosh: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 30:
|
|
/* atanh(|x|>1) */
|
|
exc.type = DOMAIN;
|
|
exc.name = "atanh";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("atanh: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 31:
|
|
/* atanh(|x|=1) */
|
|
exc.type = SING;
|
|
exc.name = "atanh";
|
|
exc.retval = x/zero; /* sign(x)*inf */
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("atanh: SING error\n", 18);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 32:
|
|
/* scalb overflow; SVID also returns +-HUGE_VAL */
|
|
exc.type = OVERFLOW;
|
|
exc.name = "scalb";
|
|
exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 33:
|
|
/* scalb underflow */
|
|
exc.type = UNDERFLOW;
|
|
exc.name = "scalb";
|
|
exc.retval = ieee_copysign(zero,x);
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 34:
|
|
/* ieee_j0(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "j0";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 35:
|
|
/* ieee_y0(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "y0";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 36:
|
|
/* ieee_j1(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "j1";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 37:
|
|
/* ieee_y1(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "y1";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 38:
|
|
/* ieee_jn(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "jn";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 39:
|
|
/* ieee_yn(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = "yn";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 40:
|
|
/* ieee_gamma(finite) overflow */
|
|
exc.type = OVERFLOW;
|
|
exc.name = "gamma";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = HUGE;
|
|
else
|
|
exc.retval = HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 41:
|
|
/* ieee_gamma(-integer) or ieee_gamma(0) */
|
|
exc.type = SING;
|
|
exc.name = "gamma";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = HUGE;
|
|
else
|
|
exc.retval = HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!ieee_matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("gamma: SING error\n", 18);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 42:
|
|
/* ieee_pow(NaN,0.0) */
|
|
/* error only if _LIB_VERSION == _SVID_ & _XOPEN_ */
|
|
exc.type = DOMAIN;
|
|
exc.name = "pow";
|
|
exc.retval = x;
|
|
if (_LIB_VERSION == _IEEE_ ||
|
|
_LIB_VERSION == _POSIX_) exc.retval = 1.0;
|
|
else if (!ieee_matherr(&exc)) {
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
}
|
|
return exc.retval;
|
|
}
|