//=============================================================================// // // 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 ); }