OrdinaryMagician/vkdoom_m
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Directory restructuring to make it easier to version projects that don't build zdoom.exe.

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SVN r4 (trunk)
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Randy Heit 2006-02-24 04:48:15 +00:00
commit cf11cbdb30
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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
// Fixed point implementation.
//
//-----------------------------------------------------------------------------
#include <stdlib.h>
#include "doomtype.h"
#include "i_system.h"
#include "m_fixed.h"
#ifndef USEASM
// C routines
fixed_t FixedMul_C (fixed_t a, fixed_t b)
{
return (fixed_t)(((__int64) a * (__int64) b) >> FRACBITS);
}
fixed_t FixedDiv_C (fixed_t a, fixed_t b)
{
if ((abs (a) >> 14) >= abs (b))
return (a^b)<0 ? FIXED_MIN : FIXED_MAX;
{
#if 0
long long c;
c = ((long long)a<<16) / ((long long)b);
return (fixed_t) c;
#endif
double c;
c = ((double)a) / ((double)b) * FRACUNIT;
/*
if (c >= 2147483648.0 || c < -2147483648.0)
I_FatalError("FixedDiv: divide by zero");
*/
return (fixed_t) c;
}
}
#endif