/*
* 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.
*/
#pragma weak __llroundf = llroundf
#if defined(__sparcv9) || defined(__amd64)
#pragma weak lroundf = llroundf
#pragma weak __lroundf = llroundf
#endif
#include "libm.h"
long long
llroundf(float x) {
union {
unsigned i;
float f;
} xx;
unsigned hx, sx, i;
xx.f = x;
hx = xx.i & ~0x80000000;
sx = xx.i & 0x80000000;
if (hx < 0x4b000000) { /* |x| < 2^23 */
/* handle |x| < 1 */
if (hx < 0x3f800000) {
if (hx >= 0x3f000000)
return (sx ? -1LL : 1LL);
return (0LL);
}
/* round x at the integer bit */
i = 1 << (0x95 - (hx >> 23));
xx.i = (xx.i + i) & ~((i << 1) - 1);
/*
* on LP32 architectures, we can just convert x to a 32-bit
* integer and sign-extend it
*/
return ((long) xx.f);
}
/* now x is nan, inf, or integral */
return ((long long) x);
}