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48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include <crl/crl_time.h>
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#ifdef CRL_USE_WINAPI_TIME
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#ifdef CRL_THROW_FP_EXCEPTIONS
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#include <float.h>
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#pragma fenv_access (on)
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namespace crl {
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void toggle_fp_exceptions(bool throwing) {
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// Allow throwing (and reporting) floating point exceptions.
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//
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// Otherwise x86 build behaves unpredictably on old hardware,
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// after an fp-error it may fail some benign operations, like
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// std::round(1.) giving 'nan' or double -> int64 giving int64_min.
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//
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// This results in unexpected assertion violations.
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auto state = (unsigned int)0;
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// Right now catch only division by zero and invalid operations.
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const auto bits = (throwing ? 0 : (_EM_ZERODIVIDE | _EM_INVALID))
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| _EM_DENORMAL | _EM_INEXACT | _EM_UNDERFLOW | _EM_OVERFLOW;
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_controlfp_s(&state, bits, _MCW_EM);
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}
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} // namespace crl
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#else // CRL_THROW_FP_EXCEPTIONS
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namespace crl {
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void toggle_fp_exceptions(bool throwing) {
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}
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} // namespace crl
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#endif // CRL_THROW_FP_EXCEPTIONS
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#endif // CRL_USE_WINAPI_TIME
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