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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 "../int_math.h"
#define makeFinite(x) { \
(x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
(x).s.lo = 0.0; \
}
#define zeroNaN(x) { \
if (crt_isnan((x).s.hi)) { \
(x).s.hi = crt_copysign(0.0, (x).s.hi); \
(x).s.lo = 0.0; \
} \
}
long double _Complex
__multc3(long double a, long double b, long double c, long double d)
{
long double ac = __gcc_qmul(a,c);
long double bd = __gcc_qmul(b,d);
long double ad = __gcc_qmul(a,d);
long double bc = __gcc_qmul(b,c);
DD real = { .ld = __gcc_qsub(ac,bd) };
DD imag = { .ld = __gcc_qadd(ad,bc) };
if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi))
{
int recalc = 0;
DD aDD = { .ld = a };
DD bDD = { .ld = b };
DD cDD = { .ld = c };
DD dDD = { .ld = d };
if (crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi))
{
makeFinite(aDD);
makeFinite(bDD);
zeroNaN(cDD);
zeroNaN(dDD);
recalc = 1;
}
if (crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi))
{
makeFinite(cDD);
makeFinite(dDD);
zeroNaN(aDD);
zeroNaN(bDD);
recalc = 1;
}
if (!recalc)
{
DD acDD = { .ld = ac };
DD bdDD = { .ld = bd };
DD adDD = { .ld = ad };
DD bcDD = { .ld = bc };
if (crt_isinf(acDD.s.hi) || crt_isinf(bdDD.s.hi) ||
crt_isinf(adDD.s.hi) || crt_isinf(bcDD.s.hi))
{
zeroNaN(aDD);
zeroNaN(bDD);
zeroNaN(cDD);
zeroNaN(dDD);
recalc = 1;
}
}
if (recalc)
{
real.s.hi = CRT_INFINITY * (aDD.s.hi*cDD.s.hi - bDD.s.hi*dDD.s.hi);
real.s.lo = 0.0;
imag.s.hi = CRT_INFINITY * (aDD.s.hi*dDD.s.hi + bDD.s.hi*cDD.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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