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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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#if defined(ELFOBJ)
#pragma weak isinfl = __isinfl
#pragma weak isnormall = __isnormall
#pragma weak issubnormall = __issubnormall
#pragma weak iszerol = __iszerol
#pragma weak signbitl = __signbitl
#endif
#include "libm.h"
#if defined(__sparc)
int
isinfl(long double x) {
int *px = (int *) &x;
return ((px[0] & ~0x80000000) == 0x7fff0000 && px[1] == 0 &&
px[2] == 0 && px[3] == 0);
}
int
isnormall(long double x) {
int *px = (int *) &x;
return ((unsigned) ((px[0] & 0x7fff0000) - 0x10000) < 0x7ffe0000);
}
int
issubnormall(long double x) {
int *px = (int *) &x;
px[0] &= ~0x80000000;
return (px[0] < 0x00010000 && (px[0] | px[1] | px[2] | px[3]) != 0);
}
int
iszerol(long double x) {
int *px = (int *) &x;
return (((px[0] & ~0x80000000) | px[1] | px[2] | px[3]) == 0);
}
int
signbitl(long double x) {
unsigned *px = (unsigned *) &x;
return (px[0] >> 31);
}
#elif defined(__x86)
int
isinfl(long double x) {
int *px = (int *) &x;
#if defined(HANDLE_UNSUPPORTED)
return ((px[2] & 0x7fff) == 0x7fff &&
((px[1] ^ 0x80000000) | px[0]) == 0);
#else
return ((px[2] & 0x7fff) == 0x7fff &&
((px[1] & ~0x80000000) | px[0]) == 0);
#endif
}
int
isnormall(long double x) {
int *px = (int *) &x;
#if defined(HANDLE_UNSUPPORTED)
return ((unsigned) ((px[2] & 0x7fff) - 1) < 0x7ffe &&
(px[1] & 0x80000000) != 0);
#else
return ((unsigned) ((px[2] & 0x7fff) - 1) < 0x7ffe);
#endif
}
int
issubnormall(long double x) {
int *px = (int *) &x;
return ((px[2] & 0x7fff) == 0 && (px[0] | px[1]) != 0);
}
int
iszerol(long double x) {
int *px = (int *) &x;
return (((px[2] & 0x7fff) | px[0] | px[1]) == 0);
}
int
signbitl(long double x) {
unsigned *px = (unsigned *) &x;
return ((px[2] >> 15) & 1);
}
#endif /* defined(__sparc) || defined(__x86) */
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