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author | Emma Miler <emma.pi@protonmail.com> | 2022-12-19 19:32:16 +0100 |
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committer | GitHub <noreply@github.com> | 2022-12-19 19:32:16 +0100 |
commit | e04f3b36accccb590a2d51b4829256b9964ac3fd (patch) | |
tree | 20ee30c82e6f53e6e772be2e1b9613eebca12bf3 /NorthstarDLL/core/math/bits.cpp | |
parent | 33f18a735986dcd136bf8ba70ad8331306c28227 (diff) | |
download | NorthstarLauncher-e04f3b36accccb590a2d51b4829256b9964ac3fd.tar.gz NorthstarLauncher-e04f3b36accccb590a2d51b4829256b9964ac3fd.zip |
Restructuring (#365)
* Remove launcher proxy
* Restructuring
* More restructuring
* Fix include dirs
* Fix merge
* Remove clang thing
* Filters
* Oops
Diffstat (limited to 'NorthstarDLL/core/math/bits.cpp')
-rw-r--r-- | NorthstarDLL/core/math/bits.cpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/NorthstarDLL/core/math/bits.cpp b/NorthstarDLL/core/math/bits.cpp new file mode 100644 index 00000000..014899f2 --- /dev/null +++ b/NorthstarDLL/core/math/bits.cpp @@ -0,0 +1,46 @@ +//=============================================================================// +// +// 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 ); +} |