816 lines
21 KiB
C
816 lines
21 KiB
C
/* @(#)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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#include <sys/cdefs.h>
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: k_standard.c,v 1.17 2011/04/11 15:17:33 drochner Exp $");
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#endif
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#include "math.h"
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#include "math_private.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 const 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 -- 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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* 48-- log2(0)
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* 49-- log2(x<0)
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*/
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double
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__kernel_standard(double x, double y, int type)
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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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SET_HIGH_WORD(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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case 101:
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/* acos(|x|>1) */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "acos" : "acosf";
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exc.retval = zero;
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if (_LIB_VERSION == _POSIX_) {
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exc.retval = zero/zero;
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errno = EDOM;
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} else if (!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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case 102:
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/* asin(|x|>1) */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "asin" : "asinf";
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exc.retval = zero;
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if(_LIB_VERSION == _POSIX_) {
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exc.retval = zero/zero;
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errno = EDOM;
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} else if (!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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case 103:
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/* 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 = type < 100 ? "atan2" : "atan2f";
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exc.retval = zero;
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if(_LIB_VERSION == _POSIX_) {
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exc.retval = copysign(signbit(y) ? M_PI : zero, x);
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} else if (!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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case 104:
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/* hypot(finite,finite) overflow */
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exc.type = OVERFLOW;
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exc.name = type < 100 ? "hypot" : "hypotf";
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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 (!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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case 105:
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/* cosh(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = type < 100 ? "cosh" : "coshf";
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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 (!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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case 106:
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/* exp(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = type < 100 ? "exp" : "expf";
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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 (!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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case 107:
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/* exp(finite) underflow */
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exc.type = UNDERFLOW;
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exc.name = type < 100 ? "exp" : "expf";
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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 (!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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case 108:
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/* y0(0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = type < 100 ? "y0" : "y0f";
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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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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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case 109:
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/* y0(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "y0" : "y0f";
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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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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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case 110:
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/* y1(0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = type < 100 ? "y1" : "y1f";
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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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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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case 111:
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/* y1(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "y1" : "y1f";
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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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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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case 112:
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/* yn(n,0) = -inf */
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exc.type = DOMAIN; /* should be SING for IEEE */
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exc.name = type < 100 ? "yn" : "ynf";
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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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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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case 113:
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/* yn(x<0) = NaN */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "yn" : "ynf";
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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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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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case 114:
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/* lgamma(finite) overflow */
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exc.type = OVERFLOW;
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exc.name = type < 100 ? "lgamma" : "lgammaf";
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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 (!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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case 115:
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/* lgamma(-integer) or lgamma(0) */
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exc.type = SING;
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exc.name = type < 100 ? "lgamma" : "lgammaf";
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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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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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case 116:
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/* log(0) */
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exc.type = SING;
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exc.name = type < 100 ? "log" : "logf";
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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 (!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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case 117:
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/* log(x<0) */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "log" : "logf";
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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 = zero/zero;
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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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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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case 118:
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/* log10(0) */
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exc.type = SING;
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exc.name = type < 100 ? "log10" : "log10f";
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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 (!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;
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case 19:
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case 119:
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/* log10(x<0) */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "log10" : "log10f";
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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 = zero/zero;
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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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if (_LIB_VERSION == _SVID_) {
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(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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case 120:
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/* pow(0.0,0.0) */
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/* error only if _LIB_VERSION == _SVID_ */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "pow" : "powf";
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exc.retval = zero;
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if (_LIB_VERSION != _SVID_) exc.retval = 1.0;
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else if (!matherr(&exc)) {
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(void) WRITE2("pow(0,0): DOMAIN error\n", 23);
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errno = EDOM;
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}
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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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exc.type = OVERFLOW;
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exc.name = type < 100 ? "pow" : "powf";
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if (_LIB_VERSION == _SVID_) {
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exc.retval = HUGE;
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y *= 0.5;
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if(x<zero&&rint(y)!=y) exc.retval = -HUGE;
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} else {
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exc.retval = HUGE_VAL;
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y *= 0.5;
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if(x<zero&&rint(y)!=y) exc.retval = -HUGE_VAL;
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}
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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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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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exc.type = UNDERFLOW;
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exc.name = type < 100 ? "pow" : "powf";
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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 (!matherr(&exc)) {
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errno = ERANGE;
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}
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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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exc.type = DOMAIN;
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exc.name = type < 100 ? "pow" : "powf";
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if (_LIB_VERSION == _SVID_)
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exc.retval = zero;
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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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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("pow(0,neg): DOMAIN error\n", 25);
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}
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errno = EDOM;
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}
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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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exc.type = DOMAIN;
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exc.name = type < 100 ? "pow" : "powf";
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if (_LIB_VERSION == _SVID_)
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exc.retval = zero;
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else
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exc.retval = zero/zero; /* X/Open allow NaN */
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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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if (_LIB_VERSION == _SVID_) {
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(void) WRITE2("neg**non-integral: DOMAIN error\n", 32);
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}
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errno = EDOM;
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}
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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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exc.type = OVERFLOW;
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exc.name = type < 100 ? "sinh" : "sinhf";
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if (_LIB_VERSION == _SVID_)
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exc.retval = ( (x>zero) ? HUGE : -HUGE);
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else
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exc.retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
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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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break;
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case 26:
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case 126:
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/* sqrt(x<0) */
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exc.type = DOMAIN;
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exc.name = type < 100 ? "sqrt" : "sqrtf";
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if (_LIB_VERSION == _SVID_)
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exc.retval = zero;
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else
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exc.retval = zero/zero;
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if (_LIB_VERSION == _POSIX_)
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errno = EDOM;
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|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("sqrt: DOMAIN error\n", 19);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 27:
|
|
case 127:
|
|
/* fmod(x,0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "fmod" : "fmodf";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = x;
|
|
else
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("fmod: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 28:
|
|
case 128:
|
|
/* remainder(x,0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "remainder" : "remainderf";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("remainder: DOMAIN error\n", 24);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 29:
|
|
case 129:
|
|
/* acosh(x<1) */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "acosh" : "acoshf";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("acosh: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 30:
|
|
case 130:
|
|
/* atanh(|x|>1) */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "atanh" : "atanhf";
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("atanh: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 31:
|
|
case 131:
|
|
/* atanh(|x|=1) */
|
|
exc.type = SING;
|
|
exc.name = type < 100 ? "atanh" : "atanhf";
|
|
exc.retval = x/zero; /* sign(x)*inf */
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("atanh: SING error\n", 18);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 32:
|
|
case 132:
|
|
/* scalb overflow; SVID also returns +-HUGE_VAL */
|
|
exc.type = OVERFLOW;
|
|
exc.name = type < 100 ? "scalb" : "scalbf";
|
|
exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 33:
|
|
case 133:
|
|
/* scalb underflow */
|
|
exc.type = UNDERFLOW;
|
|
exc.name = type < 100 ? "scalb" : "scalbf";
|
|
exc.retval = copysign(zero,x);
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 34:
|
|
case 134:
|
|
/* j0(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "j0" : "j0f";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 35:
|
|
case 135:
|
|
/* y0(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "y0" : "y0f";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 36:
|
|
case 136:
|
|
/* j1(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "j1" : "j1f";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 37:
|
|
case 137:
|
|
/* y1(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "y1" : "y1f";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 38:
|
|
case 138:
|
|
/* jn(|x|>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "jn" : "jnf";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 39:
|
|
case 139:
|
|
/* yn(x>X_TLOSS) */
|
|
exc.type = TLOSS;
|
|
exc.name = type < 100 ? "yn" : "ynf";
|
|
exc.retval = zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2(exc.name, 2);
|
|
(void) WRITE2(": TLOSS error\n", 14);
|
|
}
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 40:
|
|
case 140:
|
|
/* gamma(finite) overflow */
|
|
exc.type = OVERFLOW;
|
|
exc.name = type < 100 ? "gamma" : "gammaf";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = HUGE;
|
|
else
|
|
exc.retval = HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
errno = ERANGE;
|
|
}
|
|
break;
|
|
case 41:
|
|
case 141:
|
|
/* gamma(-integer) or gamma(0) */
|
|
exc.type = SING;
|
|
exc.name = type < 100 ? "gamma" : "gammaf";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = HUGE;
|
|
else
|
|
exc.retval = HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("gamma: SING error\n", 18);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 42:
|
|
case 142:
|
|
/* pow(NaN,0.0) */
|
|
/* error only if _LIB_VERSION == _SVID_ & _XOPEN_ */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "pow" : "powf";
|
|
exc.retval = x;
|
|
if (_LIB_VERSION == _IEEE_ ||
|
|
_LIB_VERSION == _POSIX_) exc.retval = 1.0;
|
|
else if (!matherr(&exc)) {
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 48:
|
|
case 148:
|
|
/* log2(0) */
|
|
exc.type = SING;
|
|
exc.name = type < 100 ? "log2" : "log2f";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = -HUGE;
|
|
else
|
|
exc.retval = -HUGE_VAL;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = ERANGE;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("log2: SING error\n", 18);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
case 49:
|
|
case 149:
|
|
/* log2(x<0) */
|
|
exc.type = DOMAIN;
|
|
exc.name = type < 100 ? "log2" : "log2f";
|
|
if (_LIB_VERSION == _SVID_)
|
|
exc.retval = -HUGE;
|
|
else
|
|
exc.retval = zero/zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
errno = EDOM;
|
|
else if (!matherr(&exc)) {
|
|
if (_LIB_VERSION == _SVID_) {
|
|
(void) WRITE2("log2: DOMAIN error\n", 20);
|
|
}
|
|
errno = EDOM;
|
|
}
|
|
break;
|
|
}
|
|
return exc.retval;
|
|
}
|