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gerrit-public.fairphone.software / platform / external / compiler-rt / dec793732650d7d4d5f66511ec59f04a451315fa / . / lib / builtins / ppc / multc3.c
blob: 738b65a83b03a28c21c8df0c3f51960388e1ad0c [file] [log] [blame]
Edward O'Callaghan33c13472009-08-08 04:43:56 +0000[diff] [blame]1/* This file is distributed under the University of Illinois Open Source
2 * License. See LICENSE.TXT for details.
3 */
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]4
5#include "DD.h"
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]6#include "../int_math.h"
Edward O'Callaghan33c13472009-08-08 04:43:56 +0000[diff] [blame]7
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]8#define makeFinite(x) { \
Daniel Dunbarc25c6d12011-11-16 07:33:06 +0000[diff] [blame]9 (x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]10 (x).s.lo = 0.0; \
11 }
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]12
Daniel Dunbareaff95c2011-11-16 18:56:53 +0000[diff] [blame]13#define zeroNaN(x) { \
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]14 if (crt_isnan((x).s.hi)) { \
Daniel Dunbarc25c6d12011-11-16 07:33:06 +0000[diff] [blame]15 (x).s.hi = crt_copysign(0.0, (x).s.hi); \
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]16 (x).s.lo = 0.0; \
17 } \
18 }
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]19
20long double __gcc_qadd(long double, long double);
21long double __gcc_qsub(long double, long double);
22long double __gcc_qmul(long double, long double);
23
24long double _Complex
25__multc3(long double a, long double b, long double c, long double d)
26{
27 long double ac = __gcc_qmul(a,c);
28 long double bd = __gcc_qmul(b,d);
29 long double ad = __gcc_qmul(a,d);
30 long double bc = __gcc_qmul(b,c);
31
32 DD real = { .ld = __gcc_qsub(ac,bd) };
33 DD imag = { .ld = __gcc_qadd(ad,bc) };
34
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]35 if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi))
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]36 {
37 int recalc = 0;
38
39 DD aDD = { .ld = a };
40 DD bDD = { .ld = b };
41 DD cDD = { .ld = c };
42 DD dDD = { .ld = d };
43
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]44 if (crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi))
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]45 {
46 makeFinite(aDD);
47 makeFinite(bDD);
48 zeroNaN(cDD);
49 zeroNaN(dDD);
50 recalc = 1;
51 }
52
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]53 if (crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi))
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]54 {
55 makeFinite(cDD);
56 makeFinite(dDD);
57 zeroNaN(aDD);
58 zeroNaN(bDD);
59 recalc = 1;
60 }
61
62 if (!recalc)
63 {
64 DD acDD = { .ld = ac };
65 DD bdDD = { .ld = bd };
66 DD adDD = { .ld = ad };
67 DD bcDD = { .ld = bc };
68
Daniel Dunbar86030242011-11-16 07:33:00 +0000[diff] [blame]69 if (crt_isinf(acDD.s.hi) || crt_isinf(bdDD.s.hi) ||
70 crt_isinf(adDD.s.hi) || crt_isinf(bcDD.s.hi))
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]71 {
72 zeroNaN(aDD);
73 zeroNaN(bDD);
74 zeroNaN(cDD);
75 zeroNaN(dDD);
76 recalc = 1;
77 }
78 }
79
80 if (recalc)
81 {
Daniel Dunbarc25c6d12011-11-16 07:33:06 +0000[diff] [blame]82 real.s.hi = CRT_INFINITY * (aDD.s.hi*cDD.s.hi - bDD.s.hi*dDD.s.hi);
Edward O'Callaghan8bf1e092009-08-09 18:41:02 +0000[diff] [blame]83 real.s.lo = 0.0;
Daniel Dunbarc25c6d12011-11-16 07:33:06 +0000[diff] [blame]84 imag.s.hi = CRT_INFINITY * (aDD.s.hi*dDD.s.hi + bDD.s.hi*cDD.s.hi);
Edward O'Callaghan8bf1e092009-08-09 18:41:02 +0000[diff] [blame]85 imag.s.lo = 0.0;
Daniel Dunbarb3a69012009-06-26 16:47:03 +0000[diff] [blame]86 }
87 }
88
89 long double _Complex z;
90 __real__ z = real.ld;
91 __imag__ z = imag.ld;
92
93 return z;
94}