5 Jul
2025
5 Jul
'25
1:39 a.m.
On Sat Jul 5 01:35:22 2025 +0000, Yuxuan Shui wrote:
You can't be modifying non-volatile registers in the middle of C code
You just need to put them in the [output list](https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#OutputOperands) and the compiler knows you are modifying them, so that should be fine. (albeit i mixed up output and input operands).
but what is going to prevent compiler from using those immdeiately after you modified them? The only way to interpret such test is to compile, run, and carefully study its disassembly.