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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>
#if !defined(INFINITY) && defined(HUGE_VAL)
#define INFINITY HUGE_VAL
#endif /* INFINITY */
#define makeFinite(x) { \
(x).s.hi = __builtin_copysign(isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
(x).s.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.s.hi), __builtin_fabs(dDD.s.hi) ));
if (isfinite(logbw))
{
ilogbw = (int)logbw;
cDD.s.hi = scalbn(cDD.s.hi, -ilogbw);
cDD.s.lo = scalbn(cDD.s.lo, -ilogbw);
dDD.s.hi = scalbn(dDD.s.hi, -ilogbw);
dDD.s.lo = scalbn(dDD.s.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.s.hi = scalbn(real.s.hi, -ilogbw);
real.s.lo = scalbn(real.s.lo, -ilogbw);
imag.s.hi = scalbn(imag.s.hi, -ilogbw);
imag.s.lo = scalbn(imag.s.lo, -ilogbw);
if (isnan(real.s.hi) && isnan(imag.s.hi))
{
DD aDD = { .ld = a };
DD bDD = { .ld = b };
DD rDD = { .ld = denom };
if ((rDD.s.hi == 0.0) && (!isnan(aDD.s.hi) || !isnan(bDD.s.hi)))
{
real.s.hi = __builtin_copysign(INFINITY,cDD.s.hi) * aDD.s.hi;
real.s.lo = 0.0;
imag.s.hi = __builtin_copysign(INFINITY,cDD.s.hi) * bDD.s.hi;
imag.s.lo = 0.0;
}
else if ((isinf(aDD.s.hi) || isinf(bDD.s.hi)) && isfinite(cDD.s.hi) && isfinite(dDD.s.hi))
{
makeFinite(aDD);
makeFinite(bDD);
real.s.hi = INFINITY * (aDD.s.hi*cDD.s.hi + bDD.s.hi*dDD.s.hi);
real.s.lo = 0.0;
imag.s.hi = INFINITY * (bDD.s.hi*cDD.s.hi - aDD.s.hi*dDD.s.hi);
imag.s.lo = 0.0;
}
else if ((isinf(cDD.s.hi) || isinf(dDD.s.hi)) && isfinite(aDD.s.hi) && isfinite(bDD.s.hi))
{
makeFinite(cDD);
makeFinite(dDD);
real.s.hi = __builtin_copysign(0.0,(aDD.s.hi*cDD.s.hi + bDD.s.hi*dDD.s.hi));
real.s.lo = 0.0;
imag.s.hi = __builtin_copysign(0.0,(bDD.s.hi*cDD.s.hi - aDD.s.hi*dDD.s.hi));
imag.s.lo = 0.0;
}
}
long double _Complex z;
__real__ z = real.ld;
__imag__ z = imag.ld;
return z;
}
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