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 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