1*0b57cec5SDimitry Andric //===-- mulxc3.c - Implement __mulxc3 -------------------------------------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file implements __mulxc3 for the compiler_rt library. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #if !_ARCH_PPC 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric #include "int_lib.h" 16*0b57cec5SDimitry Andric #include "int_math.h" 17*0b57cec5SDimitry Andric 18*0b57cec5SDimitry Andric // Returns: the product of a + ib and c + id 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric COMPILER_RT_ABI Lcomplex __mulxc3(long double __a, long double __b, 21*0b57cec5SDimitry Andric long double __c, long double __d) { 22*0b57cec5SDimitry Andric long double __ac = __a * __c; 23*0b57cec5SDimitry Andric long double __bd = __b * __d; 24*0b57cec5SDimitry Andric long double __ad = __a * __d; 25*0b57cec5SDimitry Andric long double __bc = __b * __c; 26*0b57cec5SDimitry Andric Lcomplex z; 27*0b57cec5SDimitry Andric COMPLEX_REAL(z) = __ac - __bd; 28*0b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = __ad + __bc; 29*0b57cec5SDimitry Andric if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) { 30*0b57cec5SDimitry Andric int __recalc = 0; 31*0b57cec5SDimitry Andric if (crt_isinf(__a) || crt_isinf(__b)) { 32*0b57cec5SDimitry Andric __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a); 33*0b57cec5SDimitry Andric __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b); 34*0b57cec5SDimitry Andric if (crt_isnan(__c)) 35*0b57cec5SDimitry Andric __c = crt_copysignl(0, __c); 36*0b57cec5SDimitry Andric if (crt_isnan(__d)) 37*0b57cec5SDimitry Andric __d = crt_copysignl(0, __d); 38*0b57cec5SDimitry Andric __recalc = 1; 39*0b57cec5SDimitry Andric } 40*0b57cec5SDimitry Andric if (crt_isinf(__c) || crt_isinf(__d)) { 41*0b57cec5SDimitry Andric __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c); 42*0b57cec5SDimitry Andric __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d); 43*0b57cec5SDimitry Andric if (crt_isnan(__a)) 44*0b57cec5SDimitry Andric __a = crt_copysignl(0, __a); 45*0b57cec5SDimitry Andric if (crt_isnan(__b)) 46*0b57cec5SDimitry Andric __b = crt_copysignl(0, __b); 47*0b57cec5SDimitry Andric __recalc = 1; 48*0b57cec5SDimitry Andric } 49*0b57cec5SDimitry Andric if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) || crt_isinf(__ad) || 50*0b57cec5SDimitry Andric crt_isinf(__bc))) { 51*0b57cec5SDimitry Andric if (crt_isnan(__a)) 52*0b57cec5SDimitry Andric __a = crt_copysignl(0, __a); 53*0b57cec5SDimitry Andric if (crt_isnan(__b)) 54*0b57cec5SDimitry Andric __b = crt_copysignl(0, __b); 55*0b57cec5SDimitry Andric if (crt_isnan(__c)) 56*0b57cec5SDimitry Andric __c = crt_copysignl(0, __c); 57*0b57cec5SDimitry Andric if (crt_isnan(__d)) 58*0b57cec5SDimitry Andric __d = crt_copysignl(0, __d); 59*0b57cec5SDimitry Andric __recalc = 1; 60*0b57cec5SDimitry Andric } 61*0b57cec5SDimitry Andric if (__recalc) { 62*0b57cec5SDimitry Andric COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c - __b * __d); 63*0b57cec5SDimitry Andric COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__a * __d + __b * __c); 64*0b57cec5SDimitry Andric } 65*0b57cec5SDimitry Andric } 66*0b57cec5SDimitry Andric return z; 67*0b57cec5SDimitry Andric } 68*0b57cec5SDimitry Andric 69*0b57cec5SDimitry Andric #endif 70