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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_ADT_APINT_H
#define RCC_ADT_APINT_H
#include "rcc/Support/Error.h"
#include <cstddef>
#include <cstdint>
#include <span>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
namespace rcc {
class APInt final {
public:
static constexpr std::uint32_t MaxBitWidth = std::uint32_t{1} << 23U;
APInt() = default;
explicit APInt(std::uint64_t Value);
[[nodiscard]] static Expected<APInt> create(std::uint32_t BitWidth,
std::span<const std::uint64_t> Words);
[[nodiscard]] static Expected<APInt> fromUnsigned(std::uint32_t BitWidth, std::uint64_t Value);
[[nodiscard]] static Expected<APInt> fromSigned(std::uint32_t BitWidth, std::int64_t Value);
[[nodiscard]] static Expected<APInt> getLowBitsSet(std::uint32_t BitWidth,
std::uint32_t SetBitCount);
[[nodiscard]] static Expected<APInt> parseDecimal(std::uint32_t BitWidth, std::string_view Text);
[[nodiscard]] static Expected<APInt> parseLLVMHex(std::uint32_t BitWidth, std::string_view Text);
[[nodiscard]] std::uint32_t bitWidth() const noexcept {
return BitWidth;
}
[[nodiscard]] std::span<const std::uint64_t> words() const noexcept {
return Words;
}
[[nodiscard]] bool isZero() const noexcept;
[[nodiscard]] bool isNegative() const noexcept;
[[nodiscard]] std::size_t activeBitWidth() const noexcept;
[[nodiscard]] std::size_t countrZero() const noexcept;
[[nodiscard]] std::size_t countlOne() const noexcept;
[[nodiscard]] bool isAllOnes() const noexcept;
[[nodiscard]] bool testBit(std::size_t Bit) const noexcept;
[[nodiscard]] std::uint64_t word(std::size_t Index) const noexcept;
[[nodiscard]] Expected<APInt> bitwiseAnd(const APInt &Other) const;
[[nodiscard]] Expected<APInt> bitwiseOr(const APInt &Other) const;
[[nodiscard]] Expected<APInt> bitwiseXor(const APInt &Other) const;
[[nodiscard]] Expected<APInt> bitwiseNot() const;
[[nodiscard]] Expected<APInt> trunc(std::uint32_t NewBitWidth) const;
[[nodiscard]] Expected<APInt> zext(std::uint32_t NewBitWidth) const;
[[nodiscard]] Expected<APInt> sext(std::uint32_t NewBitWidth) const;
[[nodiscard]] int compare(const APInt &Other) const noexcept;
[[nodiscard]] int compareToShifted(const APInt &Other, std::size_t OtherShift) const noexcept;
void multiplySmall(std::uint32_t Multiplier);
void addSmall(std::uint32_t Value);
void setBit(std::size_t Bit);
void clearBit(std::size_t Bit) noexcept;
void shiftRight(std::size_t Amount) noexcept;
[[nodiscard]] APInt shiftedLeft(std::size_t Amount) const;
void subtract(const APInt &Other) noexcept;
[[nodiscard]] std::string toUnsignedDecimal() const;
[[nodiscard]] std::string toSignedDecimal() const;
[[nodiscard]] Expected<void> verify() const;
friend bool operator==(const APInt &Left, const APInt &Right) = default;
private:
APInt(std::uint32_t BitWidth, std::vector<std::uint64_t> Words)
: BitWidth(BitWidth), Words(std::move(Words)) {}
void normalizeMagnitude() noexcept;
std::uint32_t BitWidth = 0;
std::vector<std::uint64_t> Words;
};
} // namespace rcc
#endif // RCC_ADT_APINT_H
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