/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (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 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * Copyright 2014 Nexenta Systems, Inc. All rights reserved. */ #ifndef _ASM_BITMAP_H #define _ASM_BITMAP_H #include #include #ifdef __cplusplus extern "C" { #endif #if !defined(__lint) && defined(__GNUC__) #if defined(__amd64) #define __SUF "q" #elif defined(__i386) #define __SUF "l" #else #error "port me" #endif extern __GNU_INLINE int highbit(ulong_t i) { long value; uint8_t zf; __asm__( "bsr" __SUF " %2,%0;" "setz %1" : "=r" (value), "=q" (zf) : "mr" (i) : "cc"); return (zf ? 0 : (value + 1)); } extern __GNU_INLINE int lowbit(ulong_t i) { long value; uint8_t zf; __asm__( "bsf" __SUF " %2,%0;" "setz %1" : "=r" (value), "=q" (zf) : "mr" (i) : "cc"); return (zf ? 0 : (value + 1)); } extern __GNU_INLINE uint_t atomic_btr32(uint32_t *memory, uint_t bitnum) { uint8_t value; __asm__ __volatile__( "lock;" "btrl %2,%0;" "setc %1" : "+m" (*memory), "=r" (value) : "ir" (bitnum) : "cc"); return ((uint_t)value); } #undef __SUF #endif /* !__lint && __GNUC__ */ #ifdef __cplusplus } #endif #endif /* _ASM_BITMAP_H */