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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/wasm/value-type.h"
#include "src/codegen/signature.h"
namespace v8 {
namespace internal {
namespace wasm {
base::Optional<wasm::ValueKind> WasmReturnTypeFromSignature(
const FunctionSig* wasm_signature) {
if (wasm_signature->return_count() == 0) {
return {};
} else {
DCHECK_EQ(wasm_signature->return_count(), 1);
ValueType return_type = wasm_signature->GetReturn(0);
switch (return_type.kind()) {
case kI32:
case kI64:
case kF32:
case kF64:
return {return_type.kind()};
default:
UNREACHABLE();
}
}
}
#if DEBUG
V8_EXPORT_PRIVATE extern void PrintFunctionSig(const wasm::FunctionSig* sig) {
std::ostringstream os;
os << sig->parameter_count() << " parameters:\n";
for (size_t i = 0; i < sig->parameter_count(); i++) {
os << " " << i << ": " << sig->GetParam(i) << "\n";
}
os << sig->return_count() << " returns:\n";
for (size_t i = 0; i < sig->return_count(); i++) {
os << " " << i << ": " << sig->GetReturn() << "\n";
}
PrintF("%s", os.str().c_str());
}
#endif
} // namespace wasm
} // namespace internal
} // namespace v8
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