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implement aarch64 hint 'intrinsic'

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Ralf Jung 2021-01-23 18:11:01 +01:00
parent 36ce776997
commit 848be1bf82
1 changed files with 12 additions and 0 deletions
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12
src/shims/foreign_items.rs
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@ -484,6 +484,18 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
let &[] = check_arg_count(args)?;
this.yield_active_thread();
}
"llvm.aarch64.hint" if this.tcx.sess.target.arch == "aarch64" => {
let &[hint] = check_arg_count(args)?;
let hint = this.read_scalar(hint)?.to_i32()?;
match hint {
1 => { // HINT_YIELD
this.yield_active_thread();
}
_ => {
throw_unsup_format!("unsupported llvm.aarch64.hint argument {}", hint);
}
}
}
// Platform-specific shims
_ => match this.tcx.sess.target.os.as_str() {