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/*
* 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.
*/
#ifndef _ASM_BITMAP_H
#define _ASM_BITMAP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(__lint) && defined(__GNUC__)
extern __inline__ int
highbit(ulong_t i)
{
long __value = -1l;
#if defined(__amd64)
__asm__(
"bsrq %1,%0"
: "+r" (__value)
: "r" (i)
: "cc");
#elif defined(__i386)
__asm__(
"bsrl %1,%0"
: "+r" (__value)
: "r" (i)
: "cc");
#else
#error "port me"
#endif
return ((int)(__value + 1));
}
extern __inline__ int
lowbit(ulong_t i)
{
long __value = -1l;
#if defined(__amd64)
__asm__(
"bsfq %1,%0"
: "+r" (__value)
: "r" (i)
: "cc");
#elif defined(__i386)
__asm__(
"bsfl %1,%0"
: "+r" (__value)
: "r" (i)
: "cc");
#else
#error "port me"
#endif
return ((int)(__value + 1));
}
extern __inline__ uint_t
atomic_btr32(uint32_t *memory, uint_t bitnum)
{
uint8_t __value;
#if defined(__amd64)
__asm__ __volatile__(
"lock;"
"btrl %2, (%0);"
"setc %1"
: "+r" (memory), "+r" (__value)
: "ir" (bitnum)
: "cc");
#elif defined(__i386)
__asm__ __volatile__(
"lock;"
"btrl %2, (%0);"
"setc %1"
: "+r" (memory), "=r" (__value)
: "ir" (bitnum)
: "cc");
#else
#error "port me"
#endif
return ((uint_t)__value);
}
#endif /* !__lint && __GNUC__ */
#ifdef __cplusplus
}
#endif
#endif /* _ASM_BITMAP_H */
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