10b57cec5SDimitry Andric //===-- divxc3.c - Implement __divxc3 -------------------------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file implements __divxc3 for the compiler_rt library. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #if !_ARCH_PPC 140b57cec5SDimitry Andric 150b57cec5SDimitry Andric #include "int_lib.h" 160b57cec5SDimitry Andric #include "int_math.h" 170b57cec5SDimitry Andric 180b57cec5SDimitry Andric // Returns: the quotient of (a + ib) / (c + id) 190b57cec5SDimitry Andric 20*5f757f3fSDimitry Andric COMPILER_RT_ABI Lcomplex __divxc3(xf_float __a, xf_float __b, xf_float __c, 21*5f757f3fSDimitry Andric xf_float __d) { 220b57cec5SDimitry Andric int __ilogbw = 0; 23*5f757f3fSDimitry Andric xf_float __logbw = crt_logbl(crt_fmaxl(crt_fabsl(__c), crt_fabsl(__d))); 240b57cec5SDimitry Andric if (crt_isfinite(__logbw)) { 250b57cec5SDimitry Andric __ilogbw = (int)__logbw; 260b57cec5SDimitry Andric __c = crt_scalbnl(__c, -__ilogbw); 270b57cec5SDimitry Andric __d = crt_scalbnl(__d, -__ilogbw); 280b57cec5SDimitry Andric } 29*5f757f3fSDimitry Andric xf_float __denom = __c * __c + __d * __d; 300b57cec5SDimitry Andric Lcomplex z; 310b57cec5SDimitry Andric COMPLEX_REAL(z) = crt_scalbnl((__a * __c + __b * __d) / __denom, -__ilogbw); 320b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = 330b57cec5SDimitry Andric crt_scalbnl((__b * __c - __a * __d) / __denom, -__ilogbw); 340b57cec5SDimitry Andric if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) { 350b57cec5SDimitry Andric if ((__denom == 0) && (!crt_isnan(__a) || !crt_isnan(__b))) { 360b57cec5SDimitry Andric COMPLEX_REAL(z) = crt_copysignl(CRT_INFINITY, __c) * __a; 370b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = crt_copysignl(CRT_INFINITY, __c) * __b; 380b57cec5SDimitry Andric } else if ((crt_isinf(__a) || crt_isinf(__b)) && crt_isfinite(__c) && 390b57cec5SDimitry Andric crt_isfinite(__d)) { 400b57cec5SDimitry Andric __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a); 410b57cec5SDimitry Andric __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b); 420b57cec5SDimitry Andric COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d); 430b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d); 440b57cec5SDimitry Andric } else if (crt_isinf(__logbw) && __logbw > 0 && crt_isfinite(__a) && 450b57cec5SDimitry Andric crt_isfinite(__b)) { 460b57cec5SDimitry Andric __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c); 470b57cec5SDimitry Andric __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d); 480b57cec5SDimitry Andric COMPLEX_REAL(z) = 0 * (__a * __c + __b * __d); 490b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = 0 * (__b * __c - __a * __d); 500b57cec5SDimitry Andric } 510b57cec5SDimitry Andric } 520b57cec5SDimitry Andric return z; 530b57cec5SDimitry Andric } 540b57cec5SDimitry Andric 550b57cec5SDimitry Andric #endif 56