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Add log10f approximation.

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Based on https://community.arm.com/tools/f/discussions/4292/cmsis-dsp-new-functionality-proposal/22621#22621
This commit is contained in:
Bartosz Taudul 2018-05-04 17:38:04 +02:00
parent 763db5e5cc
commit 1c47e22eca
1 changed files with 22 additions and 0 deletions
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22
server/TracyView.cpp
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@ -153,6 +153,28 @@ static const char* RealToString( double val, bool separator )
return buf;
}
tracy_force_inline float log2fast( float x )
{
float y, f;
int e;
f = frexpf( fabsf( x ), &e );
y = 1.23149591368684f;
y *= f;
y += -4.11852516267426f;
y *= f;
y += 6.02197014179219f;
y *= f;
y += -3.13396450166353f;
y += e;
return y;
}
static const float i10 = 1.f / log2f( 10 );
tracy_force_inline float log10fast( float x )
{
return log2fast( x ) * i10;
}
enum { MinVisSize = 3 };