1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /*LINTLIBRARY*/ 30 31 #pragma weak getisax = _getisax 32 #include "synonyms.h" 33 34 #include <sys/types.h> 35 #include <sys/auxv.h> 36 37 extern long ___getauxval(int type); 38 39 /* 40 * Return the 'hwcap' vector of bits in the AT_SUN_HWCAP aux vector entry. 41 * 42 * At this time, the worst-case implementation only uses 13 bits, but for 43 * future-proofing, we allow the interface to describe an arbitrary length 44 * array of 32-bit words. 45 * 46 * As a convenience, the routine returns the maximum number of array alements 47 * that may contain non-zero values. 48 */ 49 uint_t 50 getisax(uint32_t *array, uint_t n) 51 { 52 int i; 53 static uint32_t auxv_hwcap; 54 55 if (auxv_hwcap == 0) 56 auxv_hwcap = (uint32_t)___getauxval(AT_SUN_HWCAP); 57 58 if (n > 0) { 59 if (n >= 1) 60 array[0] = auxv_hwcap; 61 for (i = 1; i < n; i++) 62 array[i] = 0; 63 } 64 return (auxv_hwcap == 0 ? 0 : 1); 65 } 66