On Thu, Nov 30, 2023 at 11:42:26AM +0100, Peter Zijlstra wrote: > On Wed, Nov 29, 2023 at 09:08:14AM -0800, Boqun Feng wrote: > > > But but but, I then realized we have asm goto in C but Rust doesn't > > support them, and I haven't thought through how hard tht would be.. > > You're kidding right? > I'm not, but I've found this: https://github.com/Amanieu/rfcs/blob/inline-asm/text/0000-inline-asm.md#asm-goto seems to me, the plan for this is something like below: asm!( "cmp {}, 42", "jeq {}", in(reg) val, label { println!("a"); }, fallthrough { println!("b"); } ); But it's not implemented yet. Cc Josh in case that he knows more about this. Regards, Boqun > I thought we *finally* deprecated all compilers that didn't support > asm-goto and x86 now mandates asm-goto to build, and then this toy > language comes around ? > > What a load of crap ...
