W1066 Lost Extended floating point precision. Reduced to Double (Delphi)
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Extended precision floating-point operations are supported by Delphi compilers for 32-bit platforms, but are not supported by Delphi compilers for 64-bit platforms.
In Delphi compilers for 64-bit platforms, the precision of floating-point computations was reduced from extended (10-byte values) to double (8-byte values). We do not recommend using extended precision floating-point values. The Intel x86 architecture supports 10-byte real data types, but the trend of new processor architectures is to perform floating-point computations in parallel and with at most double precision (see the Intel® Streaming SIMD Extensions).
For reading extended precision floating-point numbers from a file, see TExtended80Rec.