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61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/* $Id: misc-x86.c,v 1.2 2009/11/08 17:21:18 fredette Exp $ */
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/* libtme/host/x86/misc-x86.c - miscellaneous code file for x86 hosts: */
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/*
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* Copyright (c) 2009 Matt Fredette
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <tme/common.h>
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_TME_RCSID("$Id: misc-x86.c,v 1.2 2009/11/08 17:21:18 fredette Exp $");
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/* includes: */
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#include <tme/misc.h>
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#if defined(__GNUC__)
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/* this returns the cycle counter: */
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inline union tme_value64
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tme_misc_cycles(void)
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{
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unsigned long reg_a;
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unsigned long reg_d;
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union tme_value64 value;
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asm(" rdtsc \n"
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: "=a" (reg_a), "=d" (reg_d));
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value.tme_value64_uint32_lo = reg_a;
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value.tme_value64_uint32_hi = reg_d;
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return (value);
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}
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#define TME_HAVE_MISC_CYCLES
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#endif /* !defined(__GNUC__) */
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