#ifndef _ASM_FUTEX_H

#define _ASM_FUTEX_H

#ifdef __KERNEL__

#include <linux/futex.h>

#include <asm/errno.h>

#include <asm/system.h>

#include <asm/uaccess.h>

#define __futex_atomic_op1(insn, ret, oldval, uaddr, oparg) \

  __asm__ __volatile (						\

"1:	" insn "\n"						\

"2:	.section .fixup,\"ax\"\n\

3:	mov	%3, %1\n\

	jmp	2b\n\

	.previous\n\

	.section __ex_table,\"a\"\n\

	.align	8\n\

	.quad	1b,3b\n\

	.previous"						\

	: "=r" (oldval), "=r" (ret), "=m" (*uaddr)		\

	: "i" (-EFAULT), "m" (*uaddr), "0" (oparg), "1" (0))

#define __futex_atomic_op2(insn, ret, oldval, uaddr, oparg) \

  __asm__ __volatile (						\

"1:	movl	%2, %0\n\

	movl	%0, %3\n"					\

	insn "\n"						\

"2:	" LOCK_PREFIX "cmpxchgl %3, %2\n\

	jnz	1b\n\

3:	.section .fixup,\"ax\"\n\

4:	mov	%5, %1\n\

	jmp	3b\n\

	.previous\n\

	.section __ex_table,\"a\"\n\

	.align	8\n\

	.quad	1b,4b,2b,4b\n\

	.previous"						\

	: "=&a" (oldval), "=&r" (ret), "=m" (*uaddr),		\

	  "=&r" (tem)						\

	: "r" (oparg), "i" (-EFAULT), "m" (*uaddr), "1" (0))

static inline int

futex_atomic_op_inuser (int encoded_op, int __user *uaddr)

{

	int op = (encoded_op >> 28) & 7;

	int cmp = (encoded_op >> 24) & 15;

	int oparg = (encoded_op << 8) >> 20;

	int cmparg = (encoded_op << 20) >> 20;

	int oldval = 0, ret, tem;

	if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))

		oparg = 1 << oparg;

	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))

		return -EFAULT;

	inc_preempt_count();

	switch (op) {

	case FUTEX_OP_SET:

		__futex_atomic_op1("xchgl %0, %2", ret, oldval, uaddr, oparg);

		break;

	case FUTEX_OP_ADD:

		__futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret, oldval,

				   uaddr, oparg);

		break;

	case FUTEX_OP_OR:

		__futex_atomic_op2("orl %4, %3", ret, oldval, uaddr, oparg);

		break;

	case FUTEX_OP_ANDN:

		__futex_atomic_op2("andl %4, %3", ret, oldval, uaddr, ~oparg);

		break;

	case FUTEX_OP_XOR:

		__futex_atomic_op2("xorl %4, %3", ret, oldval, uaddr, oparg);

		break;

	default:

		ret = -ENOSYS;

	}

	dec_preempt_count();

	if (!ret) {

		switch (cmp) {

		case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;

		case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;

		case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;

		case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;

		case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;

		case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;

		default: ret = -ENOSYS;

		}

	}

	return ret;

}

static inline int

futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)

{

	if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))

		return -EFAULT;

	__asm__ __volatile__(

		"1:	" LOCK_PREFIX "cmpxchgl %3, %1		\n"

		"2:	.section .fixup, \"ax\"			\n"

		"3:	mov     %2, %0				\n"

		"	jmp     2b				\n"

		"	.previous				\n"

		"	.section __ex_table, \"a\"		\n"

		"	.align  8				\n"

		"	.quad   1b,3b				\n"

		"	.previous				\n"

		: "=a" (oldval), "=m" (*uaddr)

		: "i" (-EFAULT), "r" (newval), "0" (oldval)

		: "memory"

	);

	return oldval;

}

#endif

#endif