CONFIG_FPE_NWFPE_XP is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support extended precision


Linux Kernel Configuration
└─>Floating point emulation
└─>Support extended precision
In linux kernel since version 2.6.12  
Say Y to include 80-bit support in the kernel floating-point
emulator. Otherwise, only 32 and 64-bit support is compiled in.
Note that gcc does not generate 80-bit operations by default,
so in most cases this option only enlarges the size of the
floating point emulator without any good reason.

You almost surely want to say N here.