65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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// hud_opts.hxx -- hud optimization tools
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//
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// Probably written by Norman Vine, started sometime in 1998 or 1999.
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//
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// Copyright (C) 1999 FlightGear Project
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifndef _HUD_OPTS_HXX
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#define _HUD_OPTS_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <simgear/compiler.h>
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#if defined(i386)
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#define USE_X86_ASM
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#endif
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#if defined(USE_X86_ASM)
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static __inline__ int FloatToInt(float f)
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{
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int r;
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__asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
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return r;
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}
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#elif defined(__MSC__) && defined(__WIN32__)
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static __inline int FloatToInt(float f)
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{
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int r;
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_asm {
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fld f
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fistp r
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}
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return r;
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}
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#else
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#define FloatToInt(F) ((int) ((F) < 0.0f ? (F)-0.5f : (F)+0.5f))
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#endif
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#endif // _HUD_OPTS_H
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