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// Copyright 2018 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.
#ifndef V8_CODEGEN_REGISTER_H_
#define V8_CODEGEN_REGISTER_H_
#include "src/codegen/register-arch.h"
#include "src/codegen/reglist.h"
namespace v8 {
namespace internal {
constexpr int AddArgumentPaddingSlots(int argument_count) {
return argument_count + ArgumentPaddingSlots(argument_count);
}
constexpr bool ShouldPadArguments(int argument_count) {
return ArgumentPaddingSlots(argument_count) != 0;
}
template <typename... RegTypes,
// All arguments must be either Register or DoubleRegister.
typename = typename std::enable_if_t<
std::conjunction_v<std::is_same<Register, RegTypes>...> ||
std::conjunction_v<std::is_same<DoubleRegister, RegTypes>...>
#ifdef V8_TARGET_ARCH_X64
|| std::conjunction_v<std::is_same<YMMRegister, RegTypes>...>
#endif // V8_TARGET_ARCH_X64
>>
inline constexpr bool AreAliased(RegTypes... regs) {
using FirstRegType = std::tuple_element_t<0, std::tuple<RegTypes...>>;
int num_different_regs = RegListBase<FirstRegType>{regs...}.Count();
int num_given_regs = (... + (regs.is_valid() ? 1 : 0));
return num_different_regs < num_given_regs;
}
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_REGISTER_H_
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