On Thu, Jul 16, 2020 at 9:25 AM 孙世龙 sunshilong <sunshilong369@xxxxxxxxx> wrote: > > >The 'A' is the constraint EAX:RDX register pair. > >Also see https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html > >and https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html. > Thanks to your attached document, I find a lot of useful information. > BTW, What does "The A register", "The B register" and etc mean? > I googled but didn't get any useful information. > Could you please give me a few brief explanations or suggest some > documents for me to go through? See the docs for the various constraints. Also see https://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints. Jeff _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
