Исправление SZT, (текущая версия) :
https://en.wikipedia.org/wiki/Endianness#Floating-point
Although the ubiquitous x86 processors of today use little-endian storage for all types of data (integer, floating point, BCD), there are a number of hardware architectures where floating-point numbers are represented in big-endian form while integers are represented in little-endian form.[17] There are ARM processors that have half little-endian, half big-endian floating-point representation for double-precision numbers: both 32-bit words are stored in little-endian like integer registers, but the most significant one first. Because there have been many floating-point formats with no «network» standard representation for them, the XDR standard uses big-endian IEEE 754 as its representation. It may therefore appear strange that the widespread IEEE 754 floating-point standard does not specify endianness.[18] Theoretically, this means that even standard IEEE floating-point data written by one machine might not be readable by another. However, on modern standard computers (i.e., implementing IEEE 754), one may in practice safely assume that the endianness is the same for floating-point numbers as for integers, making the conversion straightforward regardless of data type. (Small embedded systems using special floating-point formats may be another matter however.)
Еще в glibc есть какие-то union-ы для float и double https://code.woboq.org/userspace/glibc/sysdeps/ieee754/ldbl-128/ieee754.h.html
Можно договориться о порядке мантиссы, экспоненты и положения знакового бита, и о endian для самой мантиссы и экспоненты, и там уже в ifdef-ы это как-нибудь завернуть для единообразия
Исходная версия SZT, :
https://en.wikipedia.org/wiki/Endianness#Floating-point
Although the ubiquitous x86 processors of today use little-endian storage for all types of data (integer, floating point, BCD), there are a number of hardware architectures where floating-point numbers are represented in big-endian form while integers are represented in little-endian form.[17] There are ARM processors that have half little-endian, half big-endian floating-point representation for double-precision numbers: both 32-bit words are stored in little-endian like integer registers, but the most significant one first. Because there have been many floating-point formats with no «network» standard representation for them, the XDR standard uses big-endian IEEE 754 as its representation. It may therefore appear strange that the widespread IEEE 754 floating-point standard does not specify endianness.[18] Theoretically, this means that even standard IEEE floating-point data written by one machine might not be readable by another. However, on modern standard computers (i.e., implementing IEEE 754), one may in practice safely assume that the endianness is the same for floating-point numbers as for integers, making the conversion straightforward regardless of data type. (Small embedded systems using special floating-point formats may be another matter however.)
Еще glibc есть какие-то union-ы для float и double https://code.woboq.org/userspace/glibc/sysdeps/ieee754/ldbl-128/ieee754.h.html