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7227c89847
This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
// Denormals stripping.
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// These snippets should be common enough to be considered public domain.
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#ifndef DENORMALS_H
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#define DENORMALS_H
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#ifdef __SSE__
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#include <immintrin.h>
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#ifdef __GNUC__
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#include <x86intrin.h>
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#endif // __GNUC__
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#endif // __SSE__
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namespace lmms
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{
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#ifdef __SSE__
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// Intel® 64 and IA-32 Architectures Software Developer’s Manual,
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// Volume 1: Basic Architecture,
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// 11.6.3 Checking for the DAZ Flag in the MXCSR Register
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int inline can_we_daz()
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{
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alignas(16) unsigned char buffer[512] = {0};
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#if defined(LMMS_HOST_X86)
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_fxsave(buffer);
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#elif defined(LMMS_HOST_X86_64)
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_fxsave64(buffer);
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#endif // defined(LLMS_HOST_X86)
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// Bit 6 of the MXCSR_MASK, i.e. in the lowest byte,
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// tells if we can use the DAZ flag.
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return ((buffer[28] & (1 << 6)) != 0);
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}
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#endif // __SSE__
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// Set denormal protection for this thread.
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void inline disable_denormals()
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{
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#ifdef __SSE__
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/* Setting DAZ might freeze systems not supporting it */
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if (can_we_daz()) {
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_MM_SET_DENORMALS_ZERO_MODE( _MM_DENORMALS_ZERO_ON );
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}
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/* FTZ flag */
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_MM_SET_FLUSH_ZERO_MODE( _MM_FLUSH_ZERO_ON );
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#endif // __SSE__
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}
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} // namespace lmms
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#endif // DENORMALS_H
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