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Fast log10 is no longer needed.

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This commit is contained in:
Bartosz Taudul 2018-09-08 19:01:51 +02:00
parent 560fc34ae6
commit 2c43e1337f
1 changed files with 30 additions and 58 deletions
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88
server/TracyView.cpp
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@ -259,34 +259,6 @@ static const char* MemSizeToString( int64_t val )
return buf; return buf;
} }
tracy_force_inline float frexpf_fast( float f, int& power )
{
float ret;
int32_t fl;
memcpy( &fl, &f, 4 );
power = ( fl >> 23 ) & 0x000000ff;
power -= 0x7e;
fl &= 0x807fffff;
fl |= 0x3f000000;
memcpy( &ret, &fl, 4 );
return ret;
}
tracy_force_inline float log2fast( float x )
{
int e;
auto f = frexpf_fast( fabsf( x ), e );
auto t0 = 1.23149591368684f * f - 4.11852516267426f;
auto t1 = t0 * f + 6.02197014179219f;
auto t2 = t1 * f - 3.13396450166353f;
return t2 + e;
}
tracy_force_inline float log10fast( float x )
{
return log2fast( x ) * 0.301029995663981195213738894724493026768189881462108541310f; // 1/log2(10)
}
static void TextFocused( const char* label, const char* value ) static void TextFocused( const char* label, const char* value )
{ {
ImGui::TextDisabled( "%s", label ); ImGui::TextDisabled( "%s", label );
@ -4931,16 +4903,16 @@ void View::DrawFindZone()
if( m_findZone.logVal ) if( m_findZone.logVal )
{ {
const auto hAdj = double( Height - 4 ) / log10fast( maxVal + 1 ); const auto hAdj = double( Height - 4 ) / log10( maxVal + 1 );
for( int i=0; i<numBins; i++ ) for( int i=0; i<numBins; i++ )
{ {
const auto val = cumulateTime ? binTime[i] : bins[i]; const auto val = cumulateTime ? binTime[i] : bins[i];
if( val > 0 ) if( val > 0 )
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10fast( val + 1 ) * hAdj ), 0xFF22DDDD ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10( val + 1 ) * hAdj ), 0xFF22DDDD );
if( selBin[i] > 0 ) if( selBin[i] > 0 )
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10fast( selBin[i] + 1 ) * hAdj ), 0xFFDD7777 ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10( selBin[i] + 1 ) * hAdj ), 0xFFDD7777 );
} }
} }
} }
@ -4967,8 +4939,8 @@ void View::DrawFindZone()
if( m_findZone.logTime ) if( m_findZone.logTime )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
const auto start = int( floor( ltmin ) ); const auto start = int( floor( ltmin ) );
const auto end = int( ceil( ltmax ) ); const auto end = int( ceil( ltmax ) );
@ -5014,7 +4986,7 @@ void View::DrawFindZone()
{ {
const auto pxns = numBins / dt; const auto pxns = numBins / dt;
const auto nspx = 1.0 / pxns; const auto nspx = 1.0 / pxns;
const auto scale = std::max<float>( 0.0f, round( log10fast( nspx ) + 2 ) ); const auto scale = std::max<float>( 0.0f, round( log10( nspx ) + 2 ) );
const auto step = pow( 10, scale ); const auto step = pow( 10, scale );
const auto dx = step * pxns; const auto dx = step * pxns;
@ -5182,11 +5154,11 @@ void View::DrawFindZone()
float t0, t1; float t0, t1;
if( m_findZone.logTime ) if( m_findZone.logTime )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
t0 = ( log10fast( s ) - ltmin ) / float( ltmax - ltmin ) * numBins; t0 = ( log10( s ) - ltmin ) / float( ltmax - ltmin ) * numBins;
t1 = ( log10fast( e ) - ltmin ) / float( ltmax - ltmin ) * numBins; t1 = ( log10( e ) - ltmin ) / float( ltmax - ltmin ) * numBins;
} }
else else
{ {
@ -5865,7 +5837,7 @@ void View::DrawCompare()
if( m_compare.logVal ) if( m_compare.logVal )
{ {
const auto hAdj = double( Height - 4 ) / log10fast( maxVal + 1 ); const auto hAdj = double( Height - 4 ) / log10( maxVal + 1 );
for( int i=0; i<numBins; i++ ) for( int i=0; i<numBins; i++ )
{ {
const auto val0 = cumulateTime ? binTime[i].v0 : bins[i].v0; const auto val0 = cumulateTime ? binTime[i].v0 : bins[i].v0;
@ -5875,15 +5847,15 @@ void View::DrawCompare()
const auto val = std::min( val0, val1 ); const auto val = std::min( val0, val1 );
if( val > 0 ) if( val > 0 )
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10fast( val + 1 ) * hAdj ), 0xFFBBBB44 ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10( val + 1 ) * hAdj ), 0xFFBBBB44 );
} }
if( val1 == val ) if( val1 == val )
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 - log10fast( val + 1 ) * hAdj ), wpos + ImVec2( 2+i, Height-3 - log10fast( val0 + 1 ) * hAdj ), 0xFF22DDDD ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 - log10( val + 1 ) * hAdj ), wpos + ImVec2( 2+i, Height-3 - log10( val0 + 1 ) * hAdj ), 0xFF22DDDD );
} }
else else
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 - log10fast( val + 1 ) * hAdj ), wpos + ImVec2( 2+i, Height-3 - log10fast( val1 + 1 ) * hAdj ), 0xFF2222DD ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 - log10( val + 1 ) * hAdj ), wpos + ImVec2( 2+i, Height-3 - log10( val1 + 1 ) * hAdj ), 0xFF2222DD );
} }
} }
} }
@ -5919,8 +5891,8 @@ void View::DrawCompare()
if( m_compare.logTime ) if( m_compare.logTime )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
const auto start = int( floor( ltmin ) ); const auto start = int( floor( ltmin ) );
const auto end = int( ceil( ltmax ) ); const auto end = int( ceil( ltmax ) );
@ -5966,7 +5938,7 @@ void View::DrawCompare()
{ {
const auto pxns = numBins / dt; const auto pxns = numBins / dt;
const auto nspx = 1.0 / pxns; const auto nspx = 1.0 / pxns;
const auto scale = std::max<float>( 0.0f, round( log10fast( nspx ) + 2 ) ); const auto scale = std::max<float>( 0.0f, round( log10( nspx ) + 2 ) );
const auto step = pow( 10, scale ); const auto step = pow( 10, scale );
const auto dx = step * pxns; const auto dx = step * pxns;
@ -6003,8 +5975,8 @@ void View::DrawCompare()
if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 2, 2 ), wpos + ImVec2( w-2, Height + round( ty * 1.5 ) ) ) ) if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 2, 2 ), wpos + ImVec2( w-2, Height + round( ty * 1.5 ) ) ) )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
auto& io = ImGui::GetIO(); auto& io = ImGui::GetIO();
draw->AddLine( ImVec2( io.MousePos.x, wpos.y ), ImVec2( io.MousePos.x, wpos.y+Height-2 ), 0x33FFFFFF ); draw->AddLine( ImVec2( io.MousePos.x, wpos.y ), ImVec2( io.MousePos.x, wpos.y+Height-2 ), 0x33FFFFFF );
@ -6622,13 +6594,13 @@ void View::DrawInfo()
if( m_frameSortData.logVal ) if( m_frameSortData.logVal )
{ {
const auto hAdj = double( Height - 4 ) / log10fast( maxVal + 1 ); const auto hAdj = double( Height - 4 ) / log10( maxVal + 1 );
for( int i=0; i<numBins; i++ ) for( int i=0; i<numBins; i++ )
{ {
const auto val = bins[i]; const auto val = bins[i];
if( val > 0 ) if( val > 0 )
{ {
draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10fast( val + 1 ) * hAdj ), 0xFF22DDDD ); draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10( val + 1 ) * hAdj ), 0xFF22DDDD );
} }
} }
} }
@ -6650,8 +6622,8 @@ void View::DrawInfo()
if( m_frameSortData.logTime ) if( m_frameSortData.logTime )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
const auto start = int( floor( ltmin ) ); const auto start = int( floor( ltmin ) );
const auto end = int( ceil( ltmax ) ); const auto end = int( ceil( ltmax ) );
@ -6697,7 +6669,7 @@ void View::DrawInfo()
{ {
const auto pxns = numBins / dt; const auto pxns = numBins / dt;
const auto nspx = 1.0 / pxns; const auto nspx = 1.0 / pxns;
const auto scale = std::max<float>( 0.0f, round( log10fast( nspx ) + 2 ) ); const auto scale = std::max<float>( 0.0f, round( log10( nspx ) + 2 ) );
const auto step = pow( 10, scale ); const auto step = pow( 10, scale );
const auto dx = step * pxns; const auto dx = step * pxns;
@ -6737,11 +6709,11 @@ void View::DrawInfo()
float ta, tm; float ta, tm;
if( m_frameSortData.logTime ) if( m_frameSortData.logTime )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
ta = ( log10fast( m_frameSortData.average ) - ltmin ) / float( ltmax - ltmin ) * numBins; ta = ( log10( m_frameSortData.average ) - ltmin ) / float( ltmax - ltmin ) * numBins;
tm = ( log10fast( m_frameSortData.median ) - ltmin ) / float( ltmax - ltmin ) * numBins; tm = ( log10( m_frameSortData.median ) - ltmin ) / float( ltmax - ltmin ) * numBins;
} }
else else
{ {
@ -6764,8 +6736,8 @@ void View::DrawInfo()
if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 2, 2 ), wpos + ImVec2( w-2, Height + round( ty * 1.5 ) ) ) ) if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 2, 2 ), wpos + ImVec2( w-2, Height + round( ty * 1.5 ) ) ) )
{ {
const auto ltmin = log10fast( tmin ); const auto ltmin = log10( tmin );
const auto ltmax = log10fast( tmax ); const auto ltmax = log10( tmax );
auto& io = ImGui::GetIO(); auto& io = ImGui::GetIO();
draw->AddLine( ImVec2( io.MousePos.x, wpos.y ), ImVec2( io.MousePos.x, wpos.y+Height-2 ), 0x33FFFFFF ); draw->AddLine( ImVec2( io.MousePos.x, wpos.y ), ImVec2( io.MousePos.x, wpos.y+Height-2 ), 0x33FFFFFF );