what would be a good editor to put an assembly function into QT from a library

[AI_Messiah]

All I know is that when I switch to 64bit mode in visual studio it does not take the asm keyword

[jeremy_k]

I'm under the impression that Visual C++ has disallowed inline assembly for x64 for a while.

Quoting from https://docs.microsoft.com/en-us/cpp/assembler/inline/inline-assembler?view=msvc-160:
Inline assembly is not supported on the ARM and x64 processors.