MOVQ & reg64

[Yuri]

This, for example, does not work in GoAsm:

Code Select Expand

movq rax,mm0


Code Select Expand

Invalid operand for this mnemonic:-
movq rax,mm0

There is an old discussion (https://www.masmforum.com/board/index.php?topic=11674.msg88753#msg88753) where Jeremy clarifies that MOVD does the job for 64-bit registers. However, it seems unintuitive and easy to forget, which is what happened to me. I was confused to see an instruction described in the Intel manual failing to work on an Intel processor.

Maybe it makes sense to add that variant of MOVQ to GoAsm?

[wjr]

Sorry for the delay, I'm still in the process of setting up the 'new' computer, but I shall look into this...