July 16, 2020
1:42 p.m.
On Thu, Jul 16, 2020 at 9:25 AM 孙世龙 sunshilong <sunshilong369@gmail.com> 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