1 /* This file is distributed under the University of Illinois Open Source
2 * License. See LICENSE.TXT for details.
6 #include "../int_math.h"
8 #if !defined(CRT_INFINITY) && defined(HUGE_VAL)
9 #define CRT_INFINITY HUGE_VAL
10 #endif /* CRT_INFINITY */
12 #define makeFinite(x) { \
13 (x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
18 __divtc3(long double a, long double b, long double c, long double d)
24 const double logbw = crt_logb(crt_fmax(crt_fabs(cDD.s.hi), crt_fabs(dDD.s.hi) ));
26 if (crt_isfinite(logbw))
30 cDD.s.hi = crt_scalbn(cDD.s.hi, -ilogbw);
31 cDD.s.lo = crt_scalbn(cDD.s.lo, -ilogbw);
32 dDD.s.hi = crt_scalbn(dDD.s.hi, -ilogbw);
33 dDD.s.lo = crt_scalbn(dDD.s.lo, -ilogbw);
36 const long double denom = __gcc_qadd(__gcc_qmul(cDD.ld, cDD.ld), __gcc_qmul(dDD.ld, dDD.ld));
37 const long double realNumerator = __gcc_qadd(__gcc_qmul(a,cDD.ld), __gcc_qmul(b,dDD.ld));
38 const long double imagNumerator = __gcc_qsub(__gcc_qmul(b,cDD.ld), __gcc_qmul(a,dDD.ld));
40 DD real = { .ld = __gcc_qdiv(realNumerator, denom) };
41 DD imag = { .ld = __gcc_qdiv(imagNumerator, denom) };
43 real.s.hi = crt_scalbn(real.s.hi, -ilogbw);
44 real.s.lo = crt_scalbn(real.s.lo, -ilogbw);
45 imag.s.hi = crt_scalbn(imag.s.hi, -ilogbw);
46 imag.s.lo = crt_scalbn(imag.s.lo, -ilogbw);
48 if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi))
52 DD rDD = { .ld = denom };
54 if ((rDD.s.hi == 0.0) && (!crt_isnan(aDD.s.hi) ||
55 !crt_isnan(bDD.s.hi)))
57 real.s.hi = crt_copysign(CRT_INFINITY,cDD.s.hi) * aDD.s.hi;
59 imag.s.hi = crt_copysign(CRT_INFINITY,cDD.s.hi) * bDD.s.hi;
63 else if ((crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi)) &&
64 crt_isfinite(cDD.s.hi) && crt_isfinite(dDD.s.hi))
68 real.s.hi = CRT_INFINITY * (aDD.s.hi*cDD.s.hi + bDD.s.hi*dDD.s.hi);
70 imag.s.hi = CRT_INFINITY * (bDD.s.hi*cDD.s.hi - aDD.s.hi*dDD.s.hi);
74 else if ((crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi)) &&
75 crt_isfinite(aDD.s.hi) && crt_isfinite(bDD.s.hi))
79 real.s.hi = crt_copysign(0.0,(aDD.s.hi*cDD.s.hi + bDD.s.hi*dDD.s.hi));
81 imag.s.hi = crt_copysign(0.0,(bDD.s.hi*cDD.s.hi - aDD.s.hi*dDD.s.hi));
86 long double _Complex z;