c++ : how use assembler on code?

[cambalinho]

on internet: https://www.codeproject.com/Articles/69941/Best-Square-Root-Method-Algorithm-Function-Precisi
i have seen these function:

Code Select Expand

double inline __declspec (naked) __fastcall sqrt14(double n)
{
_asm fld qword ptr [esp+4]
_asm fsqrt
_asm ret 8
}
how can i convert these code for be compatible with GNU?

[Miguel Gimenez]

This is OT here, ask in a GNU forum or search in StackOverflow