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1//===-- multc3.c - Implement __multc3 -------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements __multc3 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#define QUAD_PRECISION14#include "fp_lib.h"15#include "int_lib.h"16#include "int_math.h"17 18#if defined(CRT_HAS_128BIT) && defined(CRT_HAS_F128)19 20// Returns: the product of a + ib and c + id21 22COMPILER_RT_ABI Qcomplex __multc3(fp_t a, fp_t b, fp_t c, fp_t d) {23 fp_t ac = a * c;24 fp_t bd = b * d;25 fp_t ad = a * d;26 fp_t bc = b * c;27 Qcomplex z;28 COMPLEXTF_REAL(z) = ac - bd;29 COMPLEXTF_IMAGINARY(z) = ad + bc;30 if (crt_isnan(COMPLEXTF_REAL(z)) && crt_isnan(COMPLEXTF_IMAGINARY(z))) {31 int recalc = 0;32 if (crt_isinf(a) || crt_isinf(b)) {33 a = crt_copysigntf(crt_isinf(a) ? 1 : 0, a);34 b = crt_copysigntf(crt_isinf(b) ? 1 : 0, b);35 if (crt_isnan(c))36 c = crt_copysigntf(0, c);37 if (crt_isnan(d))38 d = crt_copysigntf(0, d);39 recalc = 1;40 }41 if (crt_isinf(c) || crt_isinf(d)) {42 c = crt_copysigntf(crt_isinf(c) ? 1 : 0, c);43 d = crt_copysigntf(crt_isinf(d) ? 1 : 0, d);44 if (crt_isnan(a))45 a = crt_copysigntf(0, a);46 if (crt_isnan(b))47 b = crt_copysigntf(0, b);48 recalc = 1;49 }50 if (!recalc &&51 (crt_isinf(ac) || crt_isinf(bd) || crt_isinf(ad) || crt_isinf(bc))) {52 if (crt_isnan(a))53 a = crt_copysigntf(0, a);54 if (crt_isnan(b))55 b = crt_copysigntf(0, b);56 if (crt_isnan(c))57 c = crt_copysigntf(0, c);58 if (crt_isnan(d))59 d = crt_copysigntf(0, d);60 recalc = 1;61 }62 if (recalc) {63 COMPLEXTF_REAL(z) = CRT_INFINITY * (a * c - b * d);64 COMPLEXTF_IMAGINARY(z) = CRT_INFINITY * (a * d + b * c);65 }66 }67 return z;68}69 70#endif71