125c28e8Piotr Jasiukajtis/*
225c28e8Piotr Jasiukajtis * CDDL HEADER START
325c28e8Piotr Jasiukajtis *
425c28e8Piotr Jasiukajtis * The contents of this file are subject to the terms of the
525c28e8Piotr Jasiukajtis * Common Development and Distribution License (the "License").
625c28e8Piotr Jasiukajtis * You may not use this file except in compliance with the License.
725c28e8Piotr Jasiukajtis *
825c28e8Piotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
925c28e8Piotr Jasiukajtis * or http://www.opensolaris.org/os/licensing.
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1125c28e8Piotr Jasiukajtis * and limitations under the License.
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1325c28e8Piotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each
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1525c28e8Piotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the
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2125c28e8Piotr Jasiukajtis
2225c28e8Piotr Jasiukajtis/*
2325c28e8Piotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2425c28e8Piotr Jasiukajtis */
2525c28e8Piotr Jasiukajtis/*
2625c28e8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2725c28e8Piotr Jasiukajtis * Use is subject to license terms.
2825c28e8Piotr Jasiukajtis */
2925c28e8Piotr Jasiukajtis
30ddc0e0bRichard Lowe#pragma weak __cexpl = cexpl
3125c28e8Piotr Jasiukajtis
3225c28e8Piotr Jasiukajtis#include "libm.h"		/* expl/isinfl/iszerol/scalbnl/sincosl */
3325c28e8Piotr Jasiukajtis#include "complex_wrapper.h"
3425c28e8Piotr Jasiukajtis
3525c28e8Piotr Jasiukajtisextern int isinfl(long double);
3625c28e8Piotr Jasiukajtisextern int iszerol(long double);
3725c28e8Piotr Jasiukajtis
3825c28e8Piotr Jasiukajtis/* INDENT OFF */
3925c28e8Piotr Jasiukajtisstatic const long double zero = 0.0L;
4025c28e8Piotr Jasiukajtis/* INDENT ON */
4125c28e8Piotr Jasiukajtis
4225c28e8Piotr Jasiukajtisldcomplex
4325c28e8Piotr Jasiukajtiscexpl(ldcomplex z) {
4425c28e8Piotr Jasiukajtis	ldcomplex ans;
4525c28e8Piotr Jasiukajtis	long double x, y, t, c, s;
4625c28e8Piotr Jasiukajtis	int n, ix, iy, hx, hy;
4725c28e8Piotr Jasiukajtis
4825c28e8Piotr Jasiukajtis	x = LD_RE(z);
4925c28e8Piotr Jasiukajtis	y = LD_IM(z);
5025c28e8Piotr Jasiukajtis	hx = HI_XWORD(x);
5125c28e8Piotr Jasiukajtis	hy = HI_XWORD(y);
5225c28e8Piotr Jasiukajtis	ix = hx & 0x7fffffff;
5325c28e8Piotr Jasiukajtis	iy = hy & 0x7fffffff;
5425c28e8Piotr Jasiukajtis	if (iszerol(y)) {	/* y = 0 */
5525c28e8Piotr Jasiukajtis		LD_RE(ans) = expl(x);
5625c28e8Piotr Jasiukajtis		LD_IM(ans) = y;
5725c28e8Piotr Jasiukajtis	} else if (isinfl(x)) {	/* x is +-inf */
5825c28e8Piotr Jasiukajtis		if (hx < 0) {
5925c28e8Piotr Jasiukajtis			if (iy >= 0x7fff0000) {
6025c28e8Piotr Jasiukajtis				LD_RE(ans) = zero;
6125c28e8Piotr Jasiukajtis				LD_IM(ans) = zero;
6225c28e8Piotr Jasiukajtis			} else {
6325c28e8Piotr Jasiukajtis				sincosl(y, &s, &c);
6425c28e8Piotr Jasiukajtis				LD_RE(ans) = zero * c;
6525c28e8Piotr Jasiukajtis				LD_IM(ans) = zero * s;
6625c28e8Piotr Jasiukajtis			}
6725c28e8Piotr Jasiukajtis		} else {
6825c28e8Piotr Jasiukajtis			if (iy >= 0x7fff0000) {
6925c28e8Piotr Jasiukajtis				LD_RE(ans) = x;
7025c28e8Piotr Jasiukajtis				LD_IM(ans) = y - y;
7125c28e8Piotr Jasiukajtis			} else {
7225c28e8Piotr Jasiukajtis				(void) sincosl(y, &s, &c);
7325c28e8Piotr Jasiukajtis				LD_RE(ans) = x * c;
7425c28e8Piotr Jasiukajtis				LD_IM(ans) = x * s;
7525c28e8Piotr Jasiukajtis			}
7625c28e8Piotr Jasiukajtis		}
7725c28e8Piotr Jasiukajtis	} else {
7825c28e8Piotr Jasiukajtis		(void) sincosl(y, &s, &c);
7925c28e8Piotr Jasiukajtis		if (ix >= 0x400C62E4) {	/* |x| > 11356.52... ~ log(2**16384) */
8025c28e8Piotr Jasiukajtis			t = __k_cexpl(x, &n);
8125c28e8Piotr Jasiukajtis			LD_RE(ans) = scalbnl(t * c, n);
8225c28e8Piotr Jasiukajtis			LD_IM(ans) = scalbnl(t * s, n);
8325c28e8Piotr Jasiukajtis		} else {
8425c28e8Piotr Jasiukajtis			t = expl(x);
8525c28e8Piotr Jasiukajtis			LD_RE(ans) = t * c;
8625c28e8Piotr Jasiukajtis			LD_IM(ans) = t * s;
8725c28e8Piotr Jasiukajtis		}
8825c28e8Piotr Jasiukajtis	}
8925c28e8Piotr Jasiukajtis	return (ans);
9025c28e8Piotr Jasiukajtis}
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