forked from OSchip/llvm-project
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "../int_math.h"
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#include "DD.h"
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#define makeFinite(x) \
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{ \
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(x).s.hi = crt_copysign(crt_isinf((x).s.hi) ? 1.0 : 0.0, (x).s.hi); \
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(x).s.lo = 0.0; \
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}
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#define zeroNaN(x) \
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{ \
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if (crt_isnan((x).s.hi)) { \
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(x).s.hi = crt_copysign(0.0, (x).s.hi); \
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(x).s.lo = 0.0; \
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} \
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}
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long double _Complex __multc3(long double a, long double b, long double c,
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long double d) {
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long double ac = __gcc_qmul(a, c);
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long double bd = __gcc_qmul(b, d);
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long double ad = __gcc_qmul(a, d);
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long double bc = __gcc_qmul(b, c);
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DD real = {.ld = __gcc_qsub(ac, bd)};
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DD imag = {.ld = __gcc_qadd(ad, bc)};
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if (crt_isnan(real.s.hi) && crt_isnan(imag.s.hi)) {
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int recalc = 0;
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DD aDD = {.ld = a};
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DD bDD = {.ld = b};
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DD cDD = {.ld = c};
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DD dDD = {.ld = d};
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if (crt_isinf(aDD.s.hi) || crt_isinf(bDD.s.hi)) {
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makeFinite(aDD);
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makeFinite(bDD);
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zeroNaN(cDD);
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zeroNaN(dDD);
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recalc = 1;
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}
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if (crt_isinf(cDD.s.hi) || crt_isinf(dDD.s.hi)) {
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makeFinite(cDD);
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makeFinite(dDD);
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zeroNaN(aDD);
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zeroNaN(bDD);
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recalc = 1;
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}
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if (!recalc) {
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DD acDD = {.ld = ac};
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DD bdDD = {.ld = bd};
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DD adDD = {.ld = ad};
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DD bcDD = {.ld = bc};
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if (crt_isinf(acDD.s.hi) || crt_isinf(bdDD.s.hi) ||
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crt_isinf(adDD.s.hi) || crt_isinf(bcDD.s.hi)) {
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zeroNaN(aDD);
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zeroNaN(bDD);
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zeroNaN(cDD);
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zeroNaN(dDD);
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recalc = 1;
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}
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}
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if (recalc) {
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real.s.hi = CRT_INFINITY * (aDD.s.hi * cDD.s.hi - bDD.s.hi * dDD.s.hi);
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real.s.lo = 0.0;
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imag.s.hi = CRT_INFINITY * (aDD.s.hi * dDD.s.hi + bDD.s.hi * cDD.s.hi);
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imag.s.lo = 0.0;
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}
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}
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long double _Complex z;
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__real__ z = real.ld;
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__imag__ z = imag.ld;
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return z;
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}
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