/* $Id: misc-x86.c,v 1.2 2009/11/08 17:21:18 fredette Exp $ */

/* libtme/host/x86/misc-x86.c - miscellaneous code file for x86 hosts: */

/*
 * Copyright (c) 2009 Matt Fredette
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Matt Fredette.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

#include <tme/common.h>
_TME_RCSID("$Id: misc-x86.c,v 1.2 2009/11/08 17:21:18 fredette Exp $");

/* includes: */
#include <tme/misc.h>
#ifdef _TME_HAVE___RDTSC
#ifdef _MSC_VER
#include <intrin.h>
#else
#include <x86intrin.h>
#endif
#endif

#if defined(_TME_HAVE___RDTSC) || defined(__GNUC__) && !defined(__EMSCRIPTEN__)

/* this returns the cycle counter: */
inline union tme_value64
tme_misc_cycles(void)
{
  union tme_value64 value;

#ifdef _TME_HAVE___RDTSC
  value.tme_value64_uint = __rdtsc();
#else
  unsigned long reg_a;
  unsigned long reg_d;

  asm("	rdtsc	\n"
      : "=a" (reg_a), "=d" (reg_d));
  value.tme_value64_uint32_lo = reg_a;
  value.tme_value64_uint32_hi = reg_d;
#endif /* !defined(__GNUC__) */
  return (value);
}
#define TME_HAVE_MISC_CYCLES
#endif /* def _TME_HAVE___RDTSC */
