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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.
*/
#pragma weak __ceilf = ceilf
#pragma weak __floorf = floorf
/* INDENT OFF */
/*
* ceilf(x) return the biggest integral value (in float) below x
* floorf(x) return the least integral value (in float) above x
*
* NOTE: ceilf(x) and floorf(x) return result
* with the same sign as x's, including 0.0F.
*/
#include "libm.h"
static const float xf[] = {
/* ZEROF */ 0.0f,
/* ONEF */ 1.0f,
/* MONEF */ -1.0f,
/* HUGEF */ 1.0e30f,
};
#define ZEROF xf[0]
#define ONEF xf[1]
#define MONEF xf[2]
#define HUGEF xf[3]
/* INDENT ON */
float
ceilf(float x) {
volatile float dummy;
int hx, k, j, ix;
hx = *(int *) &x;
ix = hx & ~0x80000000;
k = ix >> 23;
if (((k - 127) ^ (k - 150)) < 0) {
k = (1 << (150 - k)) - 1;
if ((k & hx) != 0)
dummy = HUGEF + x; /* raise inexact */
j = k & (~(hx >> 31));
*(int *) &x = (hx + j) & ~k;
return (x);
} else if (k <= 126) {
dummy = HUGEF + x;
if (hx > 0)
return (ONEF);
else if (ix == 0)
return (x);
else
return (-ZEROF);
} else
/* signal invalid if x is a SNaN */
return (x * ONEF); /* +0 -> *1 for Cheetah */
}
float
floorf(float x) {
volatile float dummy;
int hx, k, j, ix;
hx = *(int *) &x;
ix = hx & ~0x80000000;
k = ix >> 23;
if (((k - 127) ^ (k - 150)) < 0) {
k = (1 << (150 - k)) - 1;
if ((k & hx) != 0)
dummy = HUGEF + x; /* raise inexact */
j = k & (hx >> 31);
*(int *) &x = (hx + j) & ~k;
return (x);
} else if (k <= 126) {
dummy = HUGEF + x;
if (hx > 0)
return (ZEROF);
else if (ix == 0)
return (x);
else
return (MONEF);
} else
/* signal invalid if x is a SNaN */
return (x * ONEF); /* +0 -> *1 for Cheetah */
}
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