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Added a ScopedNoDenormal class to temporarily disable denormals

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This commit is contained in:
hogliux 2017-09-12 10:46:36 +01:00
parent 71d10e750a
commit e2c8e30d72
10 changed files with 73 additions and 5 deletions
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25
modules/juce_dsp/juce_dsp.h
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@ -166,6 +166,23 @@
#define JUCE_DSP_USE_STATIC_FFTW 0
#endif
/** Config: JUCE_DSP_ENABLE_SNAP_TO_ZERO
Enables code in the dsp module to avoid floating point denormals during the
processing of some of the dsp module's filters.
Enabling this will add a slight performance overhead to the DSP module's
filters and algorithms. If your audio app already disables denormals altogether
(for exmaple, by using the ScopedNoDenormals class or the
FloatVectorOperations::disableDenormalisedNumberSupport method), then you
can safely disable this flag to shave off a few cpu cycles from the DSP module's
filters and algorithms.
*/
#ifndef JUCE_DSP_ENABLE_SNAP_TO_ZERO
#define JUCE_DSP_ENABLE_SNAP_TO_ZERO 1
#endif
//==============================================================================
#undef Complex // apparently some C libraries actually define these symbols (!)
#undef Factor
@ -185,11 +202,19 @@ namespace juce
This function will work with both primitives and simple containers.
*/
#if JUCE_DSP_ENABLE_SNAP_TO_ZERO
inline void snapToZero (float& x) noexcept { JUCE_SNAP_TO_ZERO (x); }
#ifndef DOXYGEN
inline void snapToZero (double& x) noexcept { JUCE_SNAP_TO_ZERO (x); }
inline void snapToZero (long double& x) noexcept { JUCE_SNAP_TO_ZERO (x); }
#endif
#else
inline void snapToZero (float& x) noexcept { ignoreUnused (x); }
#ifndef DOXYGEN
inline void snapToZero (double& x) noexcept { ignoreUnused (x); }
inline void snapToZero (long double& x) noexcept { ignoreUnused (x); }
#endif
#endif
}
}
}