/*

 * 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 2008 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#pragma weak _getisax = getisax

#include "lint.h"

#include <sys/types.h>

#include <sys/auxv.h>

extern long ___getauxval(int type);

/*

 * Return the 'hwcap' vector of bits in the AT_SUN_HWCAP aux vector entry.

 *

 * At this time, the worst-case implementation only uses 13 bits, but for

 * future-proofing, we allow the interface to describe an arbitrary length

 * array of 32-bit words.

 *

 * As a convenience, the routine returns the maximum number of array alements

 * that may contain non-zero values.

 */

uint_t

getisax(uint32_t *array, uint_t n)

{

	int i;

	static uint32_t auxv_hwcap;

	if (auxv_hwcap == 0)

		auxv_hwcap = (uint32_t)___getauxval(AT_SUN_HWCAP);

	if (n > 0) {

		if (n >= 1)

			array[0] = auxv_hwcap;

		for (i = 1; i < n; i++)

			array[i] = 0;

	}

	return (auxv_hwcap == 0 ? 0 : 1);

}