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
4
5 #include "../int_math.h"
6 #include "DD.h"
7
8 #define makeFinite(x) \
9 { \
10 (x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
11 (x).s.lo = 0.0; \
12 }
13
14 #define zeroNaN(x) \
15 { \
16 if (crt_isnan((x).s.hi)) { \
17 (x).s.hi = crt_copysign(0.0, (x).s.hi); \
18 (x).s.lo = 0.0; \
19 } \
20 }
21
__multc3(long double a,long double b,long double c,long double d)22 long double _Complex __multc3(long double a, long double b, long double c,
23 long double d) {
24 long double ac = __gcc_qmul(a, c);
25 long double bd = __gcc_qmul(b, d);
26 long double ad = __gcc_qmul(a, d);
27 long double bc = __gcc_qmul(b, c);
28
29 DD real = {.ld = __gcc_qsub(ac, bd)};
30 DD imag = {.ld = __gcc_qadd(ad, bc)};
31
32 if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi)) {
33 int recalc = 0;
34
35 DD aDD = {.ld = a};
36 DD bDD = {.ld = b};
37 DD cDD = {.ld = c};
38 DD dDD = {.ld = d};
39
40 if (crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi)) {
41 makeFinite(aDD);
42 makeFinite(bDD);
43 zeroNaN(cDD);
44 zeroNaN(dDD);
45 recalc = 1;
46 }
47
48 if (crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi)) {
49 makeFinite(cDD);
50 makeFinite(dDD);
51 zeroNaN(aDD);
52 zeroNaN(bDD);
53 recalc = 1;
54 }
55
56 if (!recalc) {
57 DD acDD = {.ld = ac};
58 DD bdDD = {.ld = bd};
59 DD adDD = {.ld = ad};
60 DD bcDD = {.ld = bc};
61
62 if (crt_isinf(acDD.s.hi) || crt_isinf(bdDD.s.hi) ||
63 crt_isinf(adDD.s.hi) || crt_isinf(bcDD.s.hi)) {
64 zeroNaN(aDD);
65 zeroNaN(bDD);
66 zeroNaN(cDD);
67 zeroNaN(dDD);
68 recalc = 1;
69 }
70 }
71
72 if (recalc) {
73 real.s.hi = CRT_INFINITY * (aDD.s.hi * cDD.s.hi - bDD.s.hi * dDD.s.hi);
74 real.s.lo = 0.0;
75 imag.s.hi = CRT_INFINITY * (aDD.s.hi * dDD.s.hi + bDD.s.hi * cDD.s.hi);
76 imag.s.lo = 0.0;
77 }
78 }
79
80 long double _Complex z;
81 __real__ z = real.ld;
82 __imag__ z = imag.ld;
83
84 return z;
85 }
86