1*3cab2bb3Spatrick //===-- mulxc3.c - Implement __mulxc3 -------------------------------------===//
2*3cab2bb3Spatrick //
3*3cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*3cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information.
5*3cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*3cab2bb3Spatrick //
7*3cab2bb3Spatrick //===----------------------------------------------------------------------===//
8*3cab2bb3Spatrick //
9*3cab2bb3Spatrick // This file implements __mulxc3 for the compiler_rt library.
10*3cab2bb3Spatrick //
11*3cab2bb3Spatrick //===----------------------------------------------------------------------===//
12*3cab2bb3Spatrick
13*3cab2bb3Spatrick #if !_ARCH_PPC
14*3cab2bb3Spatrick
15*3cab2bb3Spatrick #include "int_lib.h"
16*3cab2bb3Spatrick #include "int_math.h"
17*3cab2bb3Spatrick
18*3cab2bb3Spatrick // Returns: the product of a + ib and c + id
19*3cab2bb3Spatrick
__mulxc3(long double __a,long double __b,long double __c,long double __d)20*3cab2bb3Spatrick COMPILER_RT_ABI Lcomplex __mulxc3(long double __a, long double __b,
21*3cab2bb3Spatrick long double __c, long double __d) {
22*3cab2bb3Spatrick long double __ac = __a * __c;
23*3cab2bb3Spatrick long double __bd = __b * __d;
24*3cab2bb3Spatrick long double __ad = __a * __d;
25*3cab2bb3Spatrick long double __bc = __b * __c;
26*3cab2bb3Spatrick Lcomplex z;
27*3cab2bb3Spatrick COMPLEX_REAL(z) = __ac - __bd;
28*3cab2bb3Spatrick COMPLEX_IMAGINARY(z) = __ad + __bc;
29*3cab2bb3Spatrick if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) {
30*3cab2bb3Spatrick int __recalc = 0;
31*3cab2bb3Spatrick if (crt_isinf(__a) || crt_isinf(__b)) {
32*3cab2bb3Spatrick __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a);
33*3cab2bb3Spatrick __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b);
34*3cab2bb3Spatrick if (crt_isnan(__c))
35*3cab2bb3Spatrick __c = crt_copysignl(0, __c);
36*3cab2bb3Spatrick if (crt_isnan(__d))
37*3cab2bb3Spatrick __d = crt_copysignl(0, __d);
38*3cab2bb3Spatrick __recalc = 1;
39*3cab2bb3Spatrick }
40*3cab2bb3Spatrick if (crt_isinf(__c) || crt_isinf(__d)) {
41*3cab2bb3Spatrick __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c);
42*3cab2bb3Spatrick __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d);
43*3cab2bb3Spatrick if (crt_isnan(__a))
44*3cab2bb3Spatrick __a = crt_copysignl(0, __a);
45*3cab2bb3Spatrick if (crt_isnan(__b))
46*3cab2bb3Spatrick __b = crt_copysignl(0, __b);
47*3cab2bb3Spatrick __recalc = 1;
48*3cab2bb3Spatrick }
49*3cab2bb3Spatrick if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) || crt_isinf(__ad) ||
50*3cab2bb3Spatrick crt_isinf(__bc))) {
51*3cab2bb3Spatrick if (crt_isnan(__a))
52*3cab2bb3Spatrick __a = crt_copysignl(0, __a);
53*3cab2bb3Spatrick if (crt_isnan(__b))
54*3cab2bb3Spatrick __b = crt_copysignl(0, __b);
55*3cab2bb3Spatrick if (crt_isnan(__c))
56*3cab2bb3Spatrick __c = crt_copysignl(0, __c);
57*3cab2bb3Spatrick if (crt_isnan(__d))
58*3cab2bb3Spatrick __d = crt_copysignl(0, __d);
59*3cab2bb3Spatrick __recalc = 1;
60*3cab2bb3Spatrick }
61*3cab2bb3Spatrick if (__recalc) {
62*3cab2bb3Spatrick COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c - __b * __d);
63*3cab2bb3Spatrick COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__a * __d + __b * __c);
64*3cab2bb3Spatrick }
65*3cab2bb3Spatrick }
66*3cab2bb3Spatrick return z;
67*3cab2bb3Spatrick }
68*3cab2bb3Spatrick
69*3cab2bb3Spatrick #endif
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