mirror/tracy
1
0
Fork 0
mirror of https://github.com/wolfpld/tracy.git synced 2024-11-30 01:04:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implement fast frexpf.

Browse Source
This commit is contained in:
Bartosz Taudul 2018-06-06 01:53:41 +02:00
parent 26cc9d8547
commit 8696c81e7d
1 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
server/TracyView.cpp
View File

@ -153,10 +153,23 @@ static const char* RealToString( double val, bool separator )
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( fabsf( x ), &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;