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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _ASM_BITMAP_H 28 #define _ASM_BITMAP_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 #if !defined(__lint) && defined(__GNUC__) 39 40 extern __inline__ int 41 highbit(ulong_t i) 42 { 43 long __value = -1l; 44 45 #if defined(__amd64) 46 __asm__( 47 "bsrq %1,%0" 48 : "+r" (__value) 49 : "r" (i) 50 : "cc"); 51 #elif defined(__i386) 52 __asm__( 53 "bsrl %1,%0" 54 : "+r" (__value) 55 : "r" (i) 56 : "cc"); 57 #else 58 #error "port me" 59 #endif 60 return ((int)(__value + 1)); 61 } 62 63 extern __inline__ int 64 lowbit(ulong_t i) 65 { 66 long __value = -1l; 67 68 #if defined(__amd64) 69 __asm__( 70 "bsfq %1,%0" 71 : "+r" (__value) 72 : "r" (i) 73 : "cc"); 74 #elif defined(__i386) 75 __asm__( 76 "bsfl %1,%0" 77 : "+r" (__value) 78 : "r" (i) 79 : "cc"); 80 #else 81 #error "port me" 82 #endif 83 return ((int)(__value + 1)); 84 } 85 86 extern __inline__ uint_t 87 atomic_btr32(uint32_t *memory, uint_t bitnum) 88 { 89 uint8_t __value; 90 91 #if defined(__amd64) 92 __asm__ __volatile__( 93 "lock;" 94 "btrl %2, (%0);" 95 "setc %1" 96 : "+r" (memory), "+r" (__value) 97 : "ir" (bitnum) 98 : "cc"); 99 #elif defined(__i386) 100 __asm__ __volatile__( 101 "lock;" 102 "btrl %2, (%0);" 103 "setc %1" 104 : "+r" (memory), "=r" (__value) 105 : "ir" (bitnum) 106 : "cc"); 107 #else 108 #error "port me" 109 #endif 110 return ((uint_t)__value); 111 } 112 113 #endif /* !__lint && __GNUC__ */ 114 115 #ifdef __cplusplus 116 } 117 #endif 118 119 #endif /* _ASM_BITMAP_H */ 120