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/* Copyright (c) 1997-2001 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* sqrt-related functions from pd-vanilla's d_math.c */
#include "e_sqrt.h"
/* these are used in externs like "bonk" */
t_float q8_rsqrt(t_float f)
{
long l = *(long *)(&f);
if (f < 0) return (0);
else return (rsqrt_exptab[(l >> 23) & 0xff] *
rsqrt_mantissatab[(l >> 13) & 0x3ff]);
}
t_float q8_sqrt(t_float f)
{
long l = *(long *)(&f);
if (f < 0) return (0);
else return (f * rsqrt_exptab[(l >> 23) & 0xff] *
rsqrt_mantissatab[(l >> 13) & 0x3ff]);
}
/* the old names are OK unless we're in IRIX N32 */
#ifndef N32
t_float qsqrt(t_float f) {return (q8_sqrt(f)); }
t_float qrsqrt(t_float f) {return (q8_rsqrt(f)); }
#endif
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