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// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
#include "DD.h"
#include <math.h>
#define makeFinite(x) { \
(x).hi = __builtin_copysign(isinf((x).hi) ? 1.0 : 0.0, (x).hi); \
(x).lo = 0.0; \
}
long double __gcc_qadd(long double, long double);
long double __gcc_qsub(long double, long double);
long double __gcc_qmul(long double, long double);
long double __gcc_qdiv(long double, long double);
long double _Complex
__divtc3(long double a, long double b, long double c, long double d)
{
DD cDD = { .ld = c };
DD dDD = { .ld = d };
int ilogbw = 0;
const double logbw = logb(__builtin_fmax( __builtin_fabs(cDD.hi), __builtin_fabs(dDD.hi) ));
if (isfinite(logbw))
{
ilogbw = (int)logbw;
cDD.hi = scalbn(cDD.hi, -ilogbw);
cDD.lo = scalbn(cDD.lo, -ilogbw);
dDD.hi = scalbn(dDD.hi, -ilogbw);
dDD.lo = scalbn(dDD.lo, -ilogbw);
}
const long double denom = __gcc_qadd(__gcc_qmul(cDD.ld, cDD.ld), __gcc_qmul(dDD.ld, dDD.ld));
const long double realNumerator = __gcc_qadd(__gcc_qmul(a,cDD.ld), __gcc_qmul(b,dDD.ld));
const long double imagNumerator = __gcc_qsub(__gcc_qmul(b,cDD.ld), __gcc_qmul(a,dDD.ld));
DD real = { .ld = __gcc_qdiv(realNumerator, denom) };
DD imag = { .ld = __gcc_qdiv(imagNumerator, denom) };
real.hi = scalbn(real.hi, -ilogbw);
real.lo = scalbn(real.lo, -ilogbw);
imag.hi = scalbn(imag.hi, -ilogbw);
imag.lo = scalbn(imag.lo, -ilogbw);
if (isnan(real.hi) && isnan(imag.hi))
{
DD aDD = { .ld = a };
DD bDD = { .ld = b };
DD rDD = { .ld = denom };
if ((rDD.hi == 0.0) && (!isnan(aDD.hi) || !isnan(bDD.hi)))
{
real.hi = __builtin_copysign(INFINITY,cDD.hi) * aDD.hi;
real.lo = 0.0;
imag.hi = __builtin_copysign(INFINITY,cDD.hi) * bDD.hi;
imag.lo = 0.0;
}
else if ((isinf(aDD.hi) || isinf(bDD.hi)) && isfinite(cDD.hi) && isfinite(dDD.hi))
{
makeFinite(aDD);
makeFinite(bDD);
real.hi = INFINITY * (aDD.hi*cDD.hi + bDD.hi*dDD.hi);
real.lo = 0.0;
imag.hi = INFINITY * (bDD.hi*cDD.hi - aDD.hi*dDD.hi);
imag.lo = 0.0;
}
else if ((isinf(cDD.hi) || isinf(dDD.hi)) && isfinite(aDD.hi) && isfinite(bDD.hi))
{
makeFinite(cDD);
makeFinite(dDD);
real.hi = __builtin_copysign(0.0,(aDD.hi*cDD.hi + bDD.hi*dDD.hi));
real.lo = 0.0;
imag.hi = __builtin_copysign(0.0,(bDD.hi*cDD.hi - aDD.hi*dDD.hi));
imag.lo = 0.0;
}
}
long double _Complex z;
__real__ z = real.ld;
__imag__ z = imag.ld;
return z;
}
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