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//=============================================================================//
//
// Purpose: look for NANs, infinities, and underflows.
//
//=============================================================================//
#include "pch.h"
#include "bits.h"
//-----------------------------------------------------------------------------
// This follows the ANSI/IEEE 754-1985 standard
//-----------------------------------------------------------------------------
unsigned long& FloatBits(float& f)
{
return *reinterpret_cast<unsigned long*>(&f);
}
unsigned long const& FloatBits(float const& f)
{
return *reinterpret_cast<unsigned long const*>(&f);
}
float BitsToFloat(unsigned long i)
{
return *reinterpret_cast<float*>(&i);
}
bool IsFinite(float f)
{
return ((FloatBits(f) & 0x7F800000) != 0x7F800000);
}
unsigned long FloatAbsBits(float f)
{
return FloatBits(f) & 0x7FFFFFFF;
}
float FloatMakePositive(float f)
{
return fabsf(f);
}
float FloatNegate(float f)
{
return -f; // BitsToFloat( FloatBits(f) ^ 0x80000000 );
}
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