fdbf255c96
This patch removes the `FPBits` specialization for x86 Extended Precision by moving it up to `FPRep`. It also introduces enums (`Exponent`, `BiasedExponent` and `Significand`) to represent the exponent and significant parts of the floating point numbers. These enums are used to construct and observe floating point representations. Additionally, we remove `LongDoubleBits.h` that is now unnecessary.
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