3 ms·
Per the sysv abi[1] (bottom of page 11): > The long double type uses a 15 bit exponent, a 64-bit mantissa with an explicit high order significant bit and an ex
by moonchild 6y ago
Per the sysv abi[1] (bottom of page 11):
> The long double type uses a 15 bit exponent, a 64-bit mantissa with an explicit high order significant bit and an exponent bias of 16383.
So it is an 80-bit float.
https://uclibc.org/docs/psABI-x86_64.pdf https://uclibc.org/docs/psABI-x86_64.pdf
- olliej 6y agoThe question was "The FPU instruction set is the same", to which the response my response is correct, the same architecture can have different ABIs on different systems. For example on osx it is 80bit ieee, but on win64 it is a 64bit ieee. That ABI difference means that having the same instruction set is not the only thing that matters.