Date: Tue, 28 Nov 2000 22:20:36 -0800 From: Piet Delaney <pete@freebsd.piet.net> To: obrien@nuxi.com, obrien@freebsd.org Cc: Piet Delaney <pete@freebsd.piet.net>, piet@eng.sun.com, freebsd-current@freebsd.org Subject: atomic.h problem with compiling the kernel Message-ID: <20001128222036.A49666@freebsd.piet.net>
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For quite a while I couldn't get into the CVS server to update /usr/src.
I finnaly did and /usr/src compiled ok but the kernel is giving me
a problem with some asm macros in atomic.h and they aren't trivial
macros.
I was wondering if you knew what the problem was or who could
help set me straight.
-piet
--
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/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/i386/include/atomic.h,v 1.16 2000/10/28 00:28:15 jhb Exp $
*/
#ifndef _MACHINE_ATOMIC_H_
#define _MACHINE_ATOMIC_H_
/*
* Various simple arithmetic on memory which is atomic in the presence
* of interrupts and multiple processors.
*
* atomic_set_char(P, V) (*(u_char*)(P) |= (V))
* atomic_clear_char(P, V) (*(u_char*)(P) &= ~(V))
* atomic_add_char(P, V) (*(u_char*)(P) += (V))
* atomic_subtract_char(P, V) (*(u_char*)(P) -= (V))
*
* atomic_set_short(P, V) (*(u_short*)(P) |= (V))
* atomic_clear_short(P, V) (*(u_short*)(P) &= ~(V))
* atomic_add_short(P, V) (*(u_short*)(P) += (V))
* atomic_subtract_short(P, V) (*(u_short*)(P) -= (V))
*
* atomic_set_int(P, V) (*(u_int*)(P) |= (V))
* atomic_clear_int(P, V) (*(u_int*)(P) &= ~(V))
* atomic_add_int(P, V) (*(u_int*)(P) += (V))
* atomic_subtract_int(P, V) (*(u_int*)(P) -= (V))
* atomic_readandclear_int(P) (return *(u_int*)P; *(u_int*)P = 0;)
*
* atomic_set_long(P, V) (*(u_long*)(P) |= (V))
* atomic_clear_long(P, V) (*(u_long*)(P) &= ~(V))
* atomic_add_long(P, V) (*(u_long*)(P) += (V))
* atomic_subtract_long(P, V) (*(u_long*)(P) -= (V))
* atomic_readandclear_long(P) (return *(u_long*)P; *(u_long*)P = 0;)
*/
/*
* The above functions are expanded inline in the statically-linked
* kernel. Lock prefixes are generated if an SMP kernel is being
* built.
*
* Kernel modules call real functions which are built into the kernel.
* This allows kernel modules to be portable between UP and SMP systems.
*/
#if defined(KLD_MODULE)
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v);
int atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src);
#else /* !KLD_MODULE */
#if defined(SMP)
#if defined(LOCORE)
#define MPLOCKED lock ;
#else
#define MPLOCKED "lock ; "
#endif
#else
#define MPLOCKED
#endif
/*
* The assembly is volatilized to demark potential before-and-after side
* effects if an interrupt or SMP collision were to occur.
*/
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 9)
/* egcs 1.1.2+ version */
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
static __inline void \
atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
__asm __volatile(MPLOCKED OP \
: "=m" (*p) \
: "0" (*p), "ir" (V)); \
}
/*
* Atomic compare and set, used by the mutex functions
*
* if (*dst == exp) *dst = src (all 32 bit words)
*
* Returns 0 on failure, non-zero on success
*/
#if defined(I386_CPU)
static __inline int
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
{
int res = exp;
__asm __volatile(
" pushfl ; "
" cli ; "
" cmpl %1,%3 ; "
" jne 1f ; "
" movl %2,%3 ; "
"1: "
" sete %%al; "
" movzbl %%al,%0 ; "
" popfl ; "
"# atomic_cmpset_int"
: "=a" (res) /* 0 (result) */
: "0" (exp), /* 1 */
"r" (src), /* 2 */
"m" (*(dst)) /* 3 */
: "memory");
return (res);
}
#else /* defined(I386_CPU) */
static __inline int
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
{
int res = exp;
__asm __volatile (
" " MPLOCKED " "
" cmpxchgl %2,%3 ; "
" setz %%al ; "
" movzbl %%al,%0 ; "
"1: "
"# atomic_cmpset_int"
: "=a" (res) /* 0 (result) */
: "0" (exp), /* 1 */
"r" (src), /* 2 */
"m" (*(dst)) /* 3 */
: "memory");
return (res);
}
#endif /* defined(I386_CPU) */
#define atomic_cmpset_long atomic_cmpset_int
#define atomic_cmpset_acq_int atomic_cmpset_int
#define atomic_cmpset_rel_int atomic_cmpset_int
#define atomic_cmpset_acq_long atomic_cmpset_acq_int
#define atomic_cmpset_rel_long atomic_cmpset_rel_int
#else
/* gcc <= 2.8 version */
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
static __inline void \
atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
__asm __volatile(MPLOCKED OP \
: "=m" (*p) \
: "ir" (V)); \
} \
\
#endif
#endif /* KLD_MODULE */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 9)
/* egcs 1.1.2+ version */
ATOMIC_ASM(set, char, "orb %b2,%0", v)
ATOMIC_ASM(clear, char, "andb %b2,%0", ~v)
ATOMIC_ASM(add, char, "addb %b2,%0", v)
ATOMIC_ASM(subtract, char, "subb %b2,%0", v)
ATOMIC_ASM(set, short, "orw %w2,%0", v)
ATOMIC_ASM(clear, short, "andw %w2,%0", ~v)
ATOMIC_ASM(add, short, "addw %w2,%0", v)
ATOMIC_ASM(subtract, short, "subw %w2,%0", v)
ATOMIC_ASM(set, int, "orl %2,%0", v)
ATOMIC_ASM(clear, int, "andl %2,%0", ~v)
ATOMIC_ASM(add, int, "addl %2,%0", v)
ATOMIC_ASM(subtract, int, "subl %2,%0", v)
ATOMIC_ASM(set, long, "orl %2,%0", v)
ATOMIC_ASM(clear, long, "andl %2,%0", ~v)
ATOMIC_ASM(add, long, "addl %2,%0", v)
ATOMIC_ASM(subtract, long, "subl %2,%0", v)
#else
/* gcc <= 2.8 version */
ATOMIC_ASM(set, char, "orb %1,%0", v)
ATOMIC_ASM(clear, char, "andb %1,%0", ~v)
ATOMIC_ASM(add, char, "addb %1,%0", v)
ATOMIC_ASM(subtract, char, "subb %1,%0", v)
ATOMIC_ASM(set, short, "orw %1,%0", v)
ATOMIC_ASM(clear, short, "andw %1,%0", ~v)
ATOMIC_ASM(add, short, "addw %1,%0", v)
ATOMIC_ASM(subtract, short, "subw %1,%0", v)
ATOMIC_ASM(set, int, "orl %1,%0", v)
ATOMIC_ASM(clear, int, "andl %1,%0", ~v)
ATOMIC_ASM(add, int, "addl %1,%0", v)
ATOMIC_ASM(subtract, int, "subl %1,%0", v)
ATOMIC_ASM(set, long, "orl %1,%0", v)
ATOMIC_ASM(clear, long, "andl %1,%0", ~v)
ATOMIC_ASM(add, long, "addl %1,%0", v)
ATOMIC_ASM(subtract, long, "subl %1,%0", v)
#endif
#undef ATOMIC_ASM
#ifndef WANT_FUNCTIONS
#define ATOMIC_ACQ_REL(NAME, TYPE) \
static __inline void \
atomic_##NAME##_acq_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
atomic_##NAME##_##TYPE(p, v); \
} \
\
static __inline void \
atomic_##NAME##_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
atomic_##NAME##_##TYPE(p, v); \
}
ATOMIC_ACQ_REL(set, char)
ATOMIC_ACQ_REL(clear, char)
ATOMIC_ACQ_REL(add, char)
ATOMIC_ACQ_REL(subtract, char)
ATOMIC_ACQ_REL(set, short)
ATOMIC_ACQ_REL(clear, short)
ATOMIC_ACQ_REL(add, short)
ATOMIC_ACQ_REL(subtract, short)
ATOMIC_ACQ_REL(set, int)
ATOMIC_ACQ_REL(clear, int)
ATOMIC_ACQ_REL(add, int)
ATOMIC_ACQ_REL(subtract, int)
ATOMIC_ACQ_REL(set, long)
ATOMIC_ACQ_REL(clear, long)
ATOMIC_ACQ_REL(add, long)
ATOMIC_ACQ_REL(subtract, long)
#undef ATOMIC_ACQ_REL
/*
* We assume that a = b will do atomic loads and stores.
*/
#define ATOMIC_STORE_LOAD(TYPE) \
static __inline u_##TYPE \
atomic_load_acq_##TYPE(volatile u_##TYPE *p) \
{ \
return (*p); \
} \
\
static __inline void \
atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
*p = v; \
__asm __volatile("" : : : "memory"); \
}
ATOMIC_STORE_LOAD(char)
ATOMIC_STORE_LOAD(short)
ATOMIC_STORE_LOAD(int)
ATOMIC_STORE_LOAD(long)
#undef ATOMIC_STORE_LOAD
static __inline int
atomic_cmpset_ptr(volatile void *dst, void *exp, void *src)
{
return (
atomic_cmpset_int((volatile u_int *)dst, (u_int)exp, (u_int)src));
}
#define atomic_cmpset_acq_ptr atomic_cmpset_ptr
#define atomic_cmpset_rel_ptr atomic_cmpset_ptr
static __inline void *
atomic_load_acq_ptr(volatile void *p)
{
return (void *)atomic_load_acq_int((volatile u_int *)p);
}
static __inline void
atomic_store_rel_ptr(volatile void *p, void *v)
{
atomic_store_rel_int((volatile u_int *)p, (u_int)v);
}
#define ATOMIC_PTR(NAME) \
static __inline void \
atomic_##NAME##_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_int((volatile u_int *)p, v); \
} \
\
static __inline void \
atomic_##NAME##_acq_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_acq_int((volatile u_int *)p, v);\
} \
\
static __inline void \
atomic_##NAME##_rel_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_rel_int((volatile u_int *)p, v);\
}
ATOMIC_PTR(set)
ATOMIC_PTR(clear)
ATOMIC_PTR(add)
ATOMIC_PTR(subtract)
#undef ATOMIC_PTR
static __inline u_int
atomic_readandclear_int(volatile u_int *addr)
{
u_int result;
__asm __volatile (
" xorl %0,%0 ; "
" xchgl %1,%0 ; "
"# atomic_readandclear_int"
: "=&r" (result) /* 0 (result) */
: "m" (*addr)); /* 1 (addr) */
return (result);
}
static __inline u_long
atomic_readandclear_long(volatile u_long *addr)
{
u_long result;
__asm __volatile (
" xorl %0,%0 ; "
" xchgl %1,%0 ; "
"# atomic_readandclear_int"
: "=&r" (result) /* 0 (result) */
: "m" (*addr)); /* 1 (addr) */
return (result);
}
#endif
#define atomic_set_8 atomic_set_char
#define atomic_set_acq_8 atomic_set_acq_char
#define atomic_set_rel_8 atomic_set_rel_char
#define atomic_clear_8 atomic_clear_char
#define atomic_clear_acq_8 atomic_clear_acq_char
#define atomic_clear_rel_8 atomic_clear_rel_char
#define atomic_add_8 atomic_add_char
#define atomic_add_acq_8 atomic_add_acq_char
#define atomic_add_rel_8 atomic_add_rel_char
#define atomic_subtract_8 atomic_subtract_char
#define atomic_subtract_acq_8 atomic_subtract_acq_char
#define atomic_subtract_rel_8 atomic_subtract_rel_char
#define atomic_load_acq_8 atomic_load_acq_char
#define atomic_store_rel_8 atomic_store_rel_char
#define atomic_set_16 atomic_set_short
#define atomic_set_acq_16 atomic_set_acq_short
#define atomic_set_rel_16 atomic_set_rel_short
#define atomic_clear_16 atomic_clear_short
#define atomic_clear_acq_16 atomic_clear_acq_short
#define atomic_clear_rel_16 atomic_clear_rel_short
#define atomic_add_16 atomic_add_short
#define atomic_add_acq_16 atomic_add_acq_short
#define atomic_add_rel_16 atomic_add_rel_short
#define atomic_subtract_16 atomic_subtract_short
#define atomic_subtract_acq_16 atomic_subtract_acq_short
#define atomic_subtract_rel_16 atomic_subtract_rel_short
#define atomic_load_acq_16 atomic_load_acq_short
#define atomic_store_rel_16 atomic_store_rel_short
#define atomic_set_32 atomic_set_int
#define atomic_set_acq_32 atomic_set_acq_int
#define atomic_set_rel_32 atomic_set_rel_int
#define atomic_clear_32 atomic_clear_int
#define atomic_clear_acq_32 atomic_clear_acq_int
#define atomic_clear_rel_32 atomic_clear_rel_int
#define atomic_add_32 atomic_add_int
#define atomic_add_acq_32 atomic_add_acq_int
#define atomic_add_rel_32 atomic_add_rel_int
#define atomic_subtract_32 atomic_subtract_int
#define atomic_subtract_acq_32 atomic_subtract_acq_int
#define atomic_subtract_rel_32 atomic_subtract_rel_int
#define atomic_load_acq_32 atomic_load_acq_int
#define atomic_store_rel_32 atomic_store_rel_int
#define atomic_cmpset_32 atomic_cmpset_int
#define atomic_cmpset_acq_32 atomic_cmpset_acq_int
#define atomic_cmpset_rel_32 atomic_cmpset_rel_int
#define atomic_readandclear_32 atomic_readandclear_int
#endif /* ! _MACHINE_ATOMIC_H_ */
--qMm9M+Fa2AknHoGS
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="atomic.h"
/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/i386/include/atomic.h,v 1.16 2000/10/28 00:28:15 jhb Exp $
*/
#ifndef _MACHINE_ATOMIC_H_
#define _MACHINE_ATOMIC_H_
/*
* Various simple arithmetic on memory which is atomic in the presence
* of interrupts and multiple processors.
*
* atomic_set_char(P, V) (*(u_char*)(P) |= (V))
* atomic_clear_char(P, V) (*(u_char*)(P) &= ~(V))
* atomic_add_char(P, V) (*(u_char*)(P) += (V))
* atomic_subtract_char(P, V) (*(u_char*)(P) -= (V))
*
* atomic_set_short(P, V) (*(u_short*)(P) |= (V))
* atomic_clear_short(P, V) (*(u_short*)(P) &= ~(V))
* atomic_add_short(P, V) (*(u_short*)(P) += (V))
* atomic_subtract_short(P, V) (*(u_short*)(P) -= (V))
*
* atomic_set_int(P, V) (*(u_int*)(P) |= (V))
* atomic_clear_int(P, V) (*(u_int*)(P) &= ~(V))
* atomic_add_int(P, V) (*(u_int*)(P) += (V))
* atomic_subtract_int(P, V) (*(u_int*)(P) -= (V))
* atomic_readandclear_int(P) (return *(u_int*)P; *(u_int*)P = 0;)
*
* atomic_set_long(P, V) (*(u_long*)(P) |= (V))
* atomic_clear_long(P, V) (*(u_long*)(P) &= ~(V))
* atomic_add_long(P, V) (*(u_long*)(P) += (V))
* atomic_subtract_long(P, V) (*(u_long*)(P) -= (V))
* atomic_readandclear_long(P) (return *(u_long*)P; *(u_long*)P = 0;)
*/
/*
* The above functions are expanded inline in the statically-linked
* kernel. Lock prefixes are generated if an SMP kernel is being
* built.
*
* Kernel modules call real functions which are built into the kernel.
* This allows kernel modules to be portable between UP and SMP systems.
*/
#if defined(KLD_MODULE)
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v);
int atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src);
#else /* !KLD_MODULE */
#if defined(SMP)
#if defined(LOCORE)
#define MPLOCKED lock ;
#else
#define MPLOCKED "lock ; "
#endif
#else
#define MPLOCKED
#endif
/*
* The assembly is volatilized to demark potential before-and-after side
* effects if an interrupt or SMP collision were to occur.
*/
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 9)
/* egcs 1.1.2+ version */
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
static __inline void \
atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
__asm __volatile(MPLOCKED OP \
: "=m" (*p) \
: "0" (*p), "ir" (V)); \
}
/*
* Atomic compare and set, used by the mutex functions
*
* if (*dst == exp) *dst = src (all 32 bit words)
*
* Returns 0 on failure, non-zero on success
*/
#if defined(I386_CPU)
static __inline int
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
{
int res = exp;
__asm __volatile(
" pushfl ; "
" cli ; "
" cmpl %1,%3 ; "
" jne 1f ; "
" movl %2,%3 ; "
"1: "
" sete %%al; "
" movzbl %%al,%0 ; "
" popfl ; "
"# atomic_cmpset_int"
: "=a" (res) /* 0 (result) */
: "0" (exp), /* 1 */
"r" (src), /* 2 */
"m" (*(dst)) /* 3 */
: "memory");
return (res);
}
#else /* defined(I386_CPU) */
static __inline int
atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src)
{
int res = exp;
__asm __volatile (
" " MPLOCKED " "
" cmpxchgl %2,%3 ; "
" setz %%al ; "
" movzbl %%al,%0 ; "
"1: "
"# atomic_cmpset_int"
: "=a" (res) /* 0 (result) */
: "0" (exp), /* 1 */
"r" (src), /* 2 */
"m" (*(dst)) /* 3 */
: "memory");
return (res);
}
#endif /* defined(I386_CPU) */
#define atomic_cmpset_long atomic_cmpset_int
#define atomic_cmpset_acq_int atomic_cmpset_int
#define atomic_cmpset_rel_int atomic_cmpset_int
#define atomic_cmpset_acq_long atomic_cmpset_acq_int
#define atomic_cmpset_rel_long atomic_cmpset_rel_int
#else
/* gcc <= 2.8 version */
#define ATOMIC_ASM(NAME, TYPE, OP, V) \
static __inline void \
atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
__asm __volatile(MPLOCKED OP \
: "=m" (*p) \
: "ir" (V)); \
} \
\
#endif
#endif /* KLD_MODULE */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 9)
/* egcs 1.1.2+ version */
ATOMIC_ASM(set, char, "orb %b2,%0", v)
ATOMIC_ASM(clear, char, "andb %b2,%0", ~v)
ATOMIC_ASM(add, char, "addb %b2,%0", v)
ATOMIC_ASM(subtract, char, "subb %b2,%0", v)
ATOMIC_ASM(set, short, "orw %w2,%0", v)
ATOMIC_ASM(clear, short, "andw %w2,%0", ~v)
ATOMIC_ASM(add, short, "addw %w2,%0", v)
ATOMIC_ASM(subtract, short, "subw %w2,%0", v)
ATOMIC_ASM(set, int, "orl %2,%0", v)
ATOMIC_ASM(clear, int, "andl %2,%0", ~v)
ATOMIC_ASM(add, int, "addl %2,%0", v)
ATOMIC_ASM(subtract, int, "subl %2,%0", v)
ATOMIC_ASM(set, long, "orl %2,%0", v)
ATOMIC_ASM(clear, long, "andl %2,%0", ~v)
ATOMIC_ASM(add, long, "addl %2,%0", v)
ATOMIC_ASM(subtract, long, "subl %2,%0", v)
#else
/* gcc <= 2.8 version */
ATOMIC_ASM(set, char, "orb %1,%0", v)
ATOMIC_ASM(clear, char, "andb %1,%0", ~v)
ATOMIC_ASM(add, char, "addb %1,%0", v)
ATOMIC_ASM(subtract, char, "subb %1,%0", v)
ATOMIC_ASM(set, short, "orw %1,%0", v)
ATOMIC_ASM(clear, short, "andw %1,%0", ~v)
ATOMIC_ASM(add, short, "addw %1,%0", v)
ATOMIC_ASM(subtract, short, "subw %1,%0", v)
ATOMIC_ASM(set, int, "orl %1,%0", v)
ATOMIC_ASM(clear, int, "andl %1,%0", ~v)
ATOMIC_ASM(add, int, "addl %1,%0", v)
ATOMIC_ASM(subtract, int, "subl %1,%0", v)
ATOMIC_ASM(set, long, "orl %1,%0", v)
ATOMIC_ASM(clear, long, "andl %1,%0", ~v)
ATOMIC_ASM(add, long, "addl %1,%0", v)
ATOMIC_ASM(subtract, long, "subl %1,%0", v)
#endif
#undef ATOMIC_ASM
#ifndef WANT_FUNCTIONS
#define ATOMIC_ACQ_REL(NAME, TYPE) \
static __inline void \
atomic_##NAME##_acq_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
atomic_##NAME##_##TYPE(p, v); \
} \
\
static __inline void \
atomic_##NAME##_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
atomic_##NAME##_##TYPE(p, v); \
}
ATOMIC_ACQ_REL(set, char)
ATOMIC_ACQ_REL(clear, char)
ATOMIC_ACQ_REL(add, char)
ATOMIC_ACQ_REL(subtract, char)
ATOMIC_ACQ_REL(set, short)
ATOMIC_ACQ_REL(clear, short)
ATOMIC_ACQ_REL(add, short)
ATOMIC_ACQ_REL(subtract, short)
ATOMIC_ACQ_REL(set, int)
ATOMIC_ACQ_REL(clear, int)
ATOMIC_ACQ_REL(add, int)
ATOMIC_ACQ_REL(subtract, int)
ATOMIC_ACQ_REL(set, long)
ATOMIC_ACQ_REL(clear, long)
ATOMIC_ACQ_REL(add, long)
ATOMIC_ACQ_REL(subtract, long)
#undef ATOMIC_ACQ_REL
/*
* We assume that a = b will do atomic loads and stores.
*/
#define ATOMIC_STORE_LOAD(TYPE) \
static __inline u_##TYPE \
atomic_load_acq_##TYPE(volatile u_##TYPE *p) \
{ \
return (*p); \
} \
\
static __inline void \
atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\
{ \
*p = v; \
__asm __volatile("" : : : "memory"); \
}
ATOMIC_STORE_LOAD(char)
ATOMIC_STORE_LOAD(short)
ATOMIC_STORE_LOAD(int)
ATOMIC_STORE_LOAD(long)
#undef ATOMIC_STORE_LOAD
static __inline int
atomic_cmpset_ptr(volatile void *dst, void *exp, void *src)
{
return (
atomic_cmpset_int((volatile u_int *)dst, (u_int)exp, (u_int)src));
}
#define atomic_cmpset_acq_ptr atomic_cmpset_ptr
#define atomic_cmpset_rel_ptr atomic_cmpset_ptr
static __inline void *
atomic_load_acq_ptr(volatile void *p)
{
return (void *)atomic_load_acq_int((volatile u_int *)p);
}
static __inline void
atomic_store_rel_ptr(volatile void *p, void *v)
{
atomic_store_rel_int((volatile u_int *)p, (u_int)v);
}
#define ATOMIC_PTR(NAME) \
static __inline void \
atomic_##NAME##_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_int((volatile u_int *)p, v); \
} \
\
static __inline void \
atomic_##NAME##_acq_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_acq_int((volatile u_int *)p, v);\
} \
\
static __inline void \
atomic_##NAME##_rel_ptr(volatile void *p, uintptr_t v) \
{ \
atomic_##NAME##_rel_int((volatile u_int *)p, v);\
}
ATOMIC_PTR(set)
ATOMIC_PTR(clear)
ATOMIC_PTR(add)
ATOMIC_PTR(subtract)
#undef ATOMIC_PTR
static __inline u_int
atomic_readandclear_int(volatile u_int *addr)
{
u_int result;
__asm __volatile (
" xorl %0,%0 ; "
" xchgl %1,%0 ; "
"# atomic_readandclear_int"
: "=&r" (result) /* 0 (result) */
: "m" (*addr)); /* 1 (addr) */
return (result);
}
static __inline u_long
atomic_readandclear_long(volatile u_long *addr)
{
u_long result;
__asm __volatile (
" xorl %0,%0 ; "
" xchgl %1,%0 ; "
"# atomic_readandclear_int"
: "=&r" (result) /* 0 (result) */
: "m" (*addr)); /* 1 (addr) */
return (result);
}
#endif
#define atomic_set_8 atomic_set_char
#define atomic_set_acq_8 atomic_set_acq_char
#define atomic_set_rel_8 atomic_set_rel_char
#define atomic_clear_8 atomic_clear_char
#define atomic_clear_acq_8 atomic_clear_acq_char
#define atomic_clear_rel_8 atomic_clear_rel_char
#define atomic_add_8 atomic_add_char
#define atomic_add_acq_8 atomic_add_acq_char
#define atomic_add_rel_8 atomic_add_rel_char
#define atomic_subtract_8 atomic_subtract_char
#define atomic_subtract_acq_8 atomic_subtract_acq_char
#define atomic_subtract_rel_8 atomic_subtract_rel_char
#define atomic_load_acq_8 atomic_load_acq_char
#define atomic_store_rel_8 atomic_store_rel_char
#define atomic_set_16 atomic_set_short
#define atomic_set_acq_16 atomic_set_acq_short
#define atomic_set_rel_16 atomic_set_rel_short
#define atomic_clear_16 atomic_clear_short
#define atomic_clear_acq_16 atomic_clear_acq_short
#define atomic_clear_rel_16 atomic_clear_rel_short
#define atomic_add_16 atomic_add_short
#define atomic_add_acq_16 atomic_add_acq_short
#define atomic_add_rel_16 atomic_add_rel_short
#define atomic_subtract_16 atomic_subtract_short
#define atomic_subtract_acq_16 atomic_subtract_acq_short
#define atomic_subtract_rel_16 atomic_subtract_rel_short
#define atomic_load_acq_16 atomic_load_acq_short
#define atomic_store_rel_16 atomic_store_rel_short
#define atomic_set_32 atomic_set_int
#define atomic_set_acq_32 atomic_set_acq_int
#define atomic_set_rel_32 atomic_set_rel_int
#define atomic_clear_32 atomic_clear_int
#define atomic_clear_acq_32 atomic_clear_acq_int
#define atomic_clear_rel_32 atomic_clear_rel_int
#define atomic_add_32 atomic_add_int
#define atomic_add_acq_32 atomic_add_acq_int
#define atomic_add_rel_32 atomic_add_rel_int
#define atomic_subtract_32 atomic_subtract_int
#define atomic_subtract_acq_32 atomic_subtract_acq_int
#define atomic_subtract_rel_32 atomic_subtract_rel_int
#define atomic_load_acq_32 atomic_load_acq_int
#define atomic_store_rel_32 atomic_store_rel_int
#define atomic_cmpset_32 atomic_cmpset_int
#define atomic_cmpset_acq_32 atomic_cmpset_acq_int
#define atomic_cmpset_rel_32 atomic_cmpset_rel_int
#define atomic_readandclear_32 atomic_readandclear_int
#endif /* ! _MACHINE_ATOMIC_H_ */
--qMm9M+Fa2AknHoGS--
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