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// Copyright 2022 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/compiler/wasm-call-descriptors.h"
#include "src/common/globals.h"
#include "src/compiler/wasm-graph-assembler.h"
#include "src/zone/zone.h"
namespace v8::internal::compiler {
WasmCallDescriptors::WasmCallDescriptors(AccountingAllocator* allocator)
: zone_(new Zone(allocator, "wasm_call_descriptors")) {
for (int i = 0; i < kNumCallModes; i++) {
i64_to_bigint_descriptors_[i] = compiler::GetBuiltinCallDescriptor(
Builtin::kI64ToBigInt, zone_.get(), static_cast<StubCallMode>(i));
bigint_to_i64_descriptors_[i] = compiler::GetBuiltinCallDescriptor(
Builtin::kBigIntToI64, zone_.get(), static_cast<StubCallMode>(i));
bigint_to_i64_descriptor_with_framestate_ =
compiler::GetBuiltinCallDescriptor(Builtin::kBigIntToI64, zone_.get(),
StubCallMode::kCallBuiltinPointer,
true);
#if V8_TARGET_ARCH_32_BIT
i32pair_to_bigint_descriptors_[i] = compiler::GetBuiltinCallDescriptor(
Builtin::kI32PairToBigInt, zone_.get(), static_cast<StubCallMode>(i));
bigint_to_i32pair_descriptors_[i] = compiler::GetBuiltinCallDescriptor(
Builtin::kBigIntToI32Pair, zone_.get(), static_cast<StubCallMode>(i));
bigint_to_i32pair_descriptor_with_framestate_ =
compiler::GetBuiltinCallDescriptor(
Builtin::kBigIntToI32Pair, zone_.get(),
StubCallMode::kCallBuiltinPointer, true);
#endif // V8_TARGET_ARCH_32_BIT
}
}
#if V8_TARGET_ARCH_32_BIT
compiler::CallDescriptor* WasmCallDescriptors::GetLoweredCallDescriptor(
const compiler::CallDescriptor* original) {
// As long as we only have six candidates, linear search is fine.
// If we ever support more cases, we could use a hash map or something.
for (int i = 0; i < kNumCallModes; i++) {
if (original == i64_to_bigint_descriptors_[i]) {
return i32pair_to_bigint_descriptors_[i];
}
if (original == bigint_to_i64_descriptors_[i]) {
return bigint_to_i32pair_descriptors_[i];
}
}
if (original == bigint_to_i64_descriptor_with_framestate_) {
return bigint_to_i32pair_descriptor_with_framestate_;
}
return nullptr;
}
#endif // V8_TARGET_ARCH_32_BIT
} // namespace v8::internal::compiler
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