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/* catdvi - get text from DVI files
Copyright (C) 1999 Antti-Juhani Kaijanaho <gaia@iki.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "bytesex.h"
#include "fixword.h"
#include "util.h"
fix_word_t fw_remainder = 0;
double fw2double(fix_word_t fw)
{
return ((double) fw) / (((uint32) 1) << FW_FRACTION_BIT);
}
fix_word_t fw_prod(fix_word_t a, fix_word_t b)
{
fix_word_t al, bl;
if (a < 0) return - fw_prod(-a, b);
if (b < 0) return - fw_prod(a, -b);
/* We have to compute a*b >> 20 without overflowing 32 bits */
al = a & 32767;
bl = b & 32767;
a >>= 15;
b >>= 15;
return (((al*bl >> 15) + a*bl + al*b) >> 5) + (a*b << 10);
}
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