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Ryan Houdek
3759cbdb65
This implements support for 130 of the 132 x87 ops as interpreter fallbacks. The two missing ops are the BCD load and BCD store instructions and can be implemented another time. This allows us to no longer have to rely on a libstdc++ modification to handle their usage of long double. This instead works entirely through using `long double` directly in the interpreter. Which will either use real x87 on an x86 host. Or in the case of ARM devices, fall down glibc's long double soft float path. This doesn't necessarily need to be quick right now. It's more important to have the compatibility improvement from this.