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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#pragma weak _getisax = getisax
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#include "lint.h"
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#include <sys/types.h>
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#include <sys/auxv.h>
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extern long ___getauxval(int type);
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/*
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* Return the 'hwcap' vector of bits in the AT_SUN_HWCAP aux vector entry.
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*
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* At this time, the worst-case implementation only uses 13 bits, but for
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* future-proofing, we allow the interface to describe an arbitrary length
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* array of 32-bit words.
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*
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* As a convenience, the routine returns the maximum number of array alements
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* that may contain non-zero values.
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*/
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uint_t
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getisax(uint32_t *array, uint_t n)
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{
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int i;
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static uint32_t auxv_hwcap;
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if (auxv_hwcap == 0)
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auxv_hwcap = (uint32_t)___getauxval(AT_SUN_HWCAP);
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if (n > 0) {
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if (n >= 1)
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array[0] = auxv_hwcap;
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for (i = 1; i < n; i++)
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array[i] = 0;
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}
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return (auxv_hwcap == 0 ? 0 : 1);
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}
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