rtm.h

#ifndef _RTM_H
#define _RTM_H 1

/*
 * Copyright (c) 2012,2013 Intel Corporation
 * Author: Andi Kleen
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/* Official RTM intrinsics interface matching gcc/icc, but works
   on older gcc compatible compilers and binutils. */

#define _XBEGIN_STARTED		(~0u)
#define _XABORT_EXPLICIT	(1 << 0)
#define _XABORT_RETRY		(1 << 1)
#define _XABORT_CONFLICT	(1 << 2)
#define _XABORT_CAPACITY	(1 << 3)
#define _XABORT_DEBUG		(1 << 4)
#define _XABORT_NESTED		(1 << 5)
#define _XABORT_CODE(x)		(((x) >> 24) & 0xff)

#define __rtm_force_inline __attribute__((__always_inline__)) inline

static __rtm_force_inline int _xbegin(void)
{
	int ret = _XBEGIN_STARTED;
	asm volatile(".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory");
	return ret;
}

static __rtm_force_inline void _xend(void)
{
	 asm volatile(".byte 0x0f,0x01,0xd5" ::: "memory");
}

static __rtm_force_inline void _xabort(const unsigned int status)
{
	asm volatile(".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory");
}

static __rtm_force_inline int _xtest(void)
{
	unsigned char out;
	asm volatile(".byte 0x0f,0x01,0xd6 ; setnz %0" : "=r" (out) :: "memory");
	return out;
}

#endif