Michał Górny
548f62369e
Implement the support for the `_Fcomplex` and `_Dcomplex` types used by MSVC in place of the standard C99 complex types. This is necessary to make LAPACK build out of the box with MSVC, since it does not implement the default C99 types. See: https://learn.microsoft.com/en-us/cpp/c-runtime-library/complex-math-support I went for the simplest implementation possible, limiting the changes to swapping the default types used when MSVC is used as the compiler, also when `lapack_config.h` is not used. I haven't added a `LAPACK_COMPLEX_*` ifdef for it, but I can do that if you prefer. Signed-off-by: Michał Górny <mgorny@quansight.com>
54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
/*****************************************************************************
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Copyright (c) 2010, Intel Corp.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************
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* Contents: Native C interface to LAPACK utility function
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* Author: Intel Corporation
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* Created in May, 2010
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*****************************************************************************/
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#include "lapacke.h"
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#include "lapacke_utils.h"
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#ifndef LAPACK_COMPLEX_CUSTOM
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lapack_complex_double lapack_make_complex_double( double re, double im ) {
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lapack_complex_double z;
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#if defined(LAPACK_COMPLEX_STRUCTURE)
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z.real = re;
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z.imag = im;
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#elif defined(LAPACK_COMPLEX_C99)
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z = re + im * I;
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#elif defined(LAPACK_COMPLEX_CPP)
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z = std::complex<double>(re,im);
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#elif _MSC_VER
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z = _Cbuild(re, im);
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#else /* C99 is default */
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z = re + im*I;
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#endif
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return z;
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}
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#endif
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