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cranelift: Add atomic_{load,store} and fence to the interpreter (#5503)

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* cranelift: Add `fence` to interpreter

* cranelift: Add `atomic_{load,store}` to the interpreter

* fuzzgen: Add `atomic_{load,store}`

* Update cranelift/fuzzgen/src/function_generator.rs

Co-authored-by: Jamey Sharp <jamey@minilop.net>

* fuzzgen: Use type size as the alignment size.

Co-authored-by: Jamey Sharp <jamey@minilop.net>
This commit is contained in:
Afonso Bordado
2023-01-12 16:36:04 +00:00
committed by GitHub
parent 6a20ca5512
commit 82494661c1
4 changed files with 226 additions and 31 deletions
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24
cranelift/interpreter/src/step.rs
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@@ -1162,9 +1162,27 @@ where
Opcode::Iconcat => assign(Value::concat(arg(0)?, arg(1)?)?),
Opcode::AtomicRmw => unimplemented!("AtomicRmw"),
Opcode::AtomicCas => unimplemented!("AtomicCas"),
Opcode::AtomicLoad => unimplemented!("AtomicLoad"),
Opcode::AtomicStore => unimplemented!("AtomicStore"),
Opcode::Fence => unimplemented!("Fence"),
Opcode::AtomicLoad => {
let load_ty = inst_context.controlling_type().unwrap();
let addr = arg(0)?.into_int()? as u64;
// We are doing a regular load here, this isn't actually thread safe.
assign_or_memtrap(
Address::try_from(addr).and_then(|addr| state.checked_load(addr, load_ty)),
)
}
Opcode::AtomicStore => {
let val = arg(0)?;
let addr = arg(1)?.into_int()? as u64;
// We are doing a regular store here, this isn't actually thread safe.
continue_or_memtrap(
Address::try_from(addr).and_then(|addr| state.checked_store(addr, val)),
)
}
Opcode::Fence => {
// The interpreter always runs in a single threaded context, so we don't
// actually need to emit a fence here.
ControlFlow::Continue
}
Opcode::WideningPairwiseDotProductS => {
let ctrl_ty = types::I16X8;
let new_type = ctrl_ty.merge_lanes().unwrap();