Am 24.03.2013 09:46, schrieb Raphaël BOLLEN:
Aargh, although only if the inputs are left un-connected, if you
stream silence on input 1 cpu % increase is back.
I use when ever possible SSE2 to avoid denormals, compile with -msse2
-mfpmath=sse
flags and implement as followed:
///////////////////////// DENORMAL PROTECTION WITH SSE /////////////////
#ifdef __SSE__
/* On Intel set FZ (Flush to Zero) and DAZ (Denormals Are Zero)
flags to avoid costly denormals */
#ifdef __SSE3__
#include <pmmintrin.h>
inline void AVOIDDENORMALS()
{
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
}
#else
#include <xmmintrin.h>
inline void AVOIDDENORMALS()
{
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
}
#endif //__SSE3__
#else
inline void AVOIDDENORMALS() {}
#endif //__SSE__
//////////////////////////////////////////////////////////////////////////////////////////////////////////
now run once
AVOIDDENORMALS();
somewhere in init()
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