1 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
2 // See https://llvm.org/LICENSE.txt for license information.
3 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 #include "../int_math.h"
7 // Use DOUBLE_PRECISION because the soft-fp method we use is logb (on the upper
8 // half of the long doubles), even though this file defines complex division for
10 #define DOUBLE_PRECISION
11 #include "../fp_lib.h"
13 #if !defined(CRT_INFINITY) && defined(HUGE_VAL)
14 #define CRT_INFINITY HUGE_VAL
15 #endif // CRT_INFINITY
17 #define makeFinite(x) \
19 (x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
23 long double _Complex __divtc3(long double a, long double b, long double c,
30 __compiler_rt_logb(crt_fmax(crt_fabs(cDD.s.hi), crt_fabs(dDD.s.hi)));
32 if (crt_isfinite(logbw)) {
35 cDD.s.hi = crt_scalbn(cDD.s.hi, -ilogbw);
36 cDD.s.lo = crt_scalbn(cDD.s.lo, -ilogbw);
37 dDD.s.hi = crt_scalbn(dDD.s.hi, -ilogbw);
38 dDD.s.lo = crt_scalbn(dDD.s.lo, -ilogbw);
41 const long double denom =
42 __gcc_qadd(__gcc_qmul(cDD.ld, cDD.ld), __gcc_qmul(dDD.ld, dDD.ld));
43 const long double realNumerator =
44 __gcc_qadd(__gcc_qmul(a, cDD.ld), __gcc_qmul(b, dDD.ld));
45 const long double imagNumerator =
46 __gcc_qsub(__gcc_qmul(b, cDD.ld), __gcc_qmul(a, dDD.ld));
48 DD real = {.ld = __gcc_qdiv(realNumerator, denom)};
49 DD imag = {.ld = __gcc_qdiv(imagNumerator, denom)};
51 real.s.hi = crt_scalbn(real.s.hi, -ilogbw);
52 real.s.lo = crt_scalbn(real.s.lo, -ilogbw);
53 imag.s.hi = crt_scalbn(imag.s.hi, -ilogbw);
54 imag.s.lo = crt_scalbn(imag.s.lo, -ilogbw);
56 if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi)) {
59 DD rDD = {.ld = denom};
61 if ((rDD.s.hi == 0.0) && (!crt_isnan(aDD.s.hi) || !crt_isnan(bDD.s.hi))) {
62 real.s.hi = crt_copysign(CRT_INFINITY, cDD.s.hi) * aDD.s.hi;
64 imag.s.hi = crt_copysign(CRT_INFINITY, cDD.s.hi) * bDD.s.hi;
68 else if ((crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi)) &&
69 crt_isfinite(cDD.s.hi) && crt_isfinite(dDD.s.hi)) {
72 real.s.hi = CRT_INFINITY * (aDD.s.hi * cDD.s.hi + bDD.s.hi * dDD.s.hi);
74 imag.s.hi = CRT_INFINITY * (bDD.s.hi * cDD.s.hi - aDD.s.hi * dDD.s.hi);
78 else if ((crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi)) &&
79 crt_isfinite(aDD.s.hi) && crt_isfinite(bDD.s.hi)) {
83 crt_copysign(0.0, (aDD.s.hi * cDD.s.hi + bDD.s.hi * dDD.s.hi));
86 crt_copysign(0.0, (bDD.s.hi * cDD.s.hi - aDD.s.hi * dDD.s.hi));
91 long double _Complex z;