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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __cexpf = cexpf
#include "libm.h"
#include "complex_wrapper.h"
#if defined(__i386) && !defined(__amd64)
extern int __swapRP(int);
#endif
static const float zero = 0.0F;
fcomplex
cexpf(fcomplex z) {
fcomplex ans;
float x, y, c, s;
double t;
int n, ix, iy, hx, hy;
x = F_RE(z);
y = F_IM(z);
hx = THE_WORD(x);
hy = THE_WORD(y);
ix = hx & 0x7fffffff;
iy = hy & 0x7fffffff;
if (iy == 0) { /* y = 0 */
F_RE(ans) = expf(x);
F_IM(ans) = y;
} else if (ix == 0x7f800000) { /* x is +-inf */
if (hx < 0) {
if (iy >= 0x7f800000) {
F_RE(ans) = zero;
F_IM(ans) = zero;
} else {
sincosf(y, &s, &c);
F_RE(ans) = zero * c;
F_IM(ans) = zero * s;
}
} else {
if (iy >= 0x7f800000) {
F_RE(ans) = x;
F_IM(ans) = y - y;
} else {
sincosf(y, &s, &c);
F_RE(ans) = x * c;
F_IM(ans) = x * s;
}
}
} else {
sincosf(y, &s, &c);
if (ix >= 0x42B171AA) { /* |x| > 88.722... ~ log(2**128) */
#if defined(__i386) && !defined(__amd64)
int rp = __swapRP(fp_extended);
#endif
t = __k_cexp(x, &n);
F_RE(ans) = (float)scalbn(t * (double)c, n);
F_IM(ans) = (float)scalbn(t * (double)s, n);
#if defined(__i386) && !defined(__amd64)
if (rp != fp_extended)
(void) __swapRP(rp);
#endif
} else {
t = expf(x);
F_RE(ans) = t * c;
F_IM(ans) = t * s;
}
}
return (ans);
}
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