Repository navigation
asm! -> llvm_asm! #306
Description
Current c2rust produces assembler in the style of asm!("cpsie i" : : : "memory" : "volatile"), which is the style nowadays used with the llvm_asm macro since rust-lang/rust#71007 was merged.
A short-term solution I'm currently using as a workaround is to replace " asm!(" with " llvm_asm!(" in the output (hoping nobody puts this into literals); that's the route I'd like to take for a fix in c2rust as well. It has produced working binaries, though I'm not sure it ever passed through the asm code. (But hey, at least it built).
(A long-term solution might be using modern asm!, but a) that can wait until stable and b) it's probably better suited for a separate ... casm2rust? project, if it's ever really needed at all).
Metadata
Metadata
Assignees
Labels
No labels
Activity
chrysn commentedon Sep 22, 2020
A thing I missed originally (as I'm only using
--emit-modules) but discovered in unrelated testing: Thefeature(asm)present when exporting transpiled code as a whole needs to becomefeature(llvm_asm)as well.chrysn commentedon Sep 22, 2020
The third occurrence of asm,
global_asm!, seems to be unaffected by this transition, and did not have its name changed when asm was renamed to llvm_asm.ahomescu commentedon Sep 22, 2020
This makes sense to me, afaik when they introduced the new asm syntax they just renamed the old macro from
asm!tollvm_asm!.fw-immunant commentedon Apr 13, 2022
Closing as this is no longer relevant: in current Rust,
llvm_asm!is gone,asm!is stable since 1.59, and PR #374 landed translation that producesasm!. Anything left is tracked in #363.Acknowledge that assebly can be pulled in through static inlines