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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-exception4 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 22long 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