GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcompiler_rt/divdc3.c Lines: 0 24 0.0 %
Date: 2017-11-07 Branches: 0 26 0.0 %

Line Branch Exec Source
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/* ===-- divdc3.c - Implement __divdc3 -------------------------------------===
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 *
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 *                     The LLVM Compiler Infrastructure
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 *
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 * This file is dual licensed under the MIT and the University of Illinois Open
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 * Source Licenses. See LICENSE.TXT for details.
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 *
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 * ===----------------------------------------------------------------------===
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 *
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 * This file implements __divdc3 for the compiler_rt library.
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 *
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 * ===----------------------------------------------------------------------===
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 */
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#include "int_lib.h"
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#include "int_math.h"
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/* Returns: the quotient of (a + ib) / (c + id) */
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COMPILER_RT_ABI Dcomplex
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__divdc3(double __a, double __b, double __c, double __d)
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{
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    int __ilogbw = 0;
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    double __logbw = crt_logb(crt_fmax(crt_fabs(__c), crt_fabs(__d)));
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    if (crt_isfinite(__logbw))
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    {
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        __ilogbw = (int)__logbw;
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        __c = crt_scalbn(__c, -__ilogbw);
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        __d = crt_scalbn(__d, -__ilogbw);
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    }
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    double __denom = __c * __c + __d * __d;
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    Dcomplex z;
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    COMPLEX_REAL(z) = crt_scalbn((__a * __c + __b * __d) / __denom, -__ilogbw);
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    COMPLEX_IMAGINARY(z) = crt_scalbn((__b * __c - __a * __d) / __denom, -__ilogbw);
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    if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z)))
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    {
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        if ((__denom == 0.0) && (!crt_isnan(__a) || !crt_isnan(__b)))
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        {
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            COMPLEX_REAL(z) = crt_copysign(CRT_INFINITY, __c) * __a;
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            COMPLEX_IMAGINARY(z) = crt_copysign(CRT_INFINITY, __c) * __b;
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        }
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        else if ((crt_isinf(__a) || crt_isinf(__b)) &&
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                 crt_isfinite(__c) && crt_isfinite(__d))
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        {
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            __a = crt_copysign(crt_isinf(__a) ? 1.0 : 0.0, __a);
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            __b = crt_copysign(crt_isinf(__b) ? 1.0 : 0.0, __b);
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            COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d);
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            COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d);
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        }
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        else if (crt_isinf(__logbw) && __logbw > 0.0 &&
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                 crt_isfinite(__a) && crt_isfinite(__b))
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        {
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            __c = crt_copysign(crt_isinf(__c) ? 1.0 : 0.0, __c);
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            __d = crt_copysign(crt_isinf(__d) ? 1.0 : 0.0, __d);
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            COMPLEX_REAL(z) = 0.0 * (__a * __c + __b * __d);
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            COMPLEX_IMAGINARY(z) = 0.0 * (__b * __c - __a * __d);
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        }
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    }
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    return z;
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}