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1//===-- divxc3.c - Implement __divxc3 -------------------------------------===//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 __divxc3 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#if !_ARCH_PPC14 15#include "int_lib.h"16#include "int_math.h"17 18// Returns: the quotient of (a + ib) / (c + id)19 20COMPILER_RT_ABI Lcomplex __divxc3(xf_float __a, xf_float __b, xf_float __c,21 xf_float __d) {22 int __ilogbw = 0;23 xf_float __logbw = crt_logbl(crt_fmaxl(crt_fabsl(__c), crt_fabsl(__d)));24 if (crt_isfinite(__logbw)) {25 __ilogbw = (int)__logbw;26 __c = crt_scalbnl(__c, -__ilogbw);27 __d = crt_scalbnl(__d, -__ilogbw);28 }29 xf_float __denom = __c * __c + __d * __d;30 Lcomplex z;31 COMPLEX_REAL(z) = crt_scalbnl((__a * __c + __b * __d) / __denom, -__ilogbw);32 COMPLEX_IMAGINARY(z) =33 crt_scalbnl((__b * __c - __a * __d) / __denom, -__ilogbw);34 if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) {35 if ((__denom == 0) && (!crt_isnan(__a) || !crt_isnan(__b))) {36 COMPLEX_REAL(z) = crt_copysignl(CRT_INFINITY, __c) * __a;37 COMPLEX_IMAGINARY(z) = crt_copysignl(CRT_INFINITY, __c) * __b;38 } else if ((crt_isinf(__a) || crt_isinf(__b)) && crt_isfinite(__c) &&39 crt_isfinite(__d)) {40 __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a);41 __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b);42 COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d);43 COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d);44 } else if (crt_isinf(__logbw) && __logbw > 0 && crt_isfinite(__a) &&45 crt_isfinite(__b)) {46 __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c);47 __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d);48 COMPLEX_REAL(z) = 0 * (__a * __c + __b * __d);49 COMPLEX_IMAGINARY(z) = 0 * (__b * __c - __a * __d);50 }51 }52 return z;53}54 55#endif56