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118 lines
2.5 KiB
C++
118 lines
2.5 KiB
C++
#pragma once
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#include <stdexcept>
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#include "Common/Types/Primitive.hpp"
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#include "Common/Types/Register/DwordRegister.hpp"
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/// Sized Dword register.
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class SizedDwordRegister : public DwordRegister
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{
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public:
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SizedDwordRegister(const udword initial_value = 0, const bool read_only = false) :
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d(initial_value),
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initial_value(initial_value),
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read_only(read_only)
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{
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}
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/// Initialise register.
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void initialise() override
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{
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d = initial_value;
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}
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/// Read/write functions to access the register.
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ubyte read_ubyte(const size_t offset) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_BYTES_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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return b[offset];
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}
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void write_ubyte(const size_t offset, const ubyte value) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_BYTES_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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if (!read_only)
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b[offset] = value;
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}
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uhword read_uhword(const size_t offset) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_HWORDS_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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return h[offset];
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}
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void write_uhword(const size_t offset, const uhword value) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_HWORDS_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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if (!read_only)
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h[offset] = value;
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}
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uword read_uword(const size_t offset) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_WORDS_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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return w[offset];
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}
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void write_uword(const size_t offset, const uword value) override
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{
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#if defined(BUILD_DEBUG)
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if (offset >= NUMBER_WORDS_IN_DWORD)
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throw std::runtime_error("Tried to access SizedDwordRegister with an invalid offset.");
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#endif
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if (!read_only)
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w[offset] = value;
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}
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udword read_udword() override
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{
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return d;
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}
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void write_udword(const udword value) override
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{
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if (!read_only)
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d = value;
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}
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private:
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/// Primitive (sized) storage for register.
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union
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{
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ubyte b[NUMBER_BYTES_IN_DWORD];
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uhword h[NUMBER_HWORDS_IN_DWORD];
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uword w[NUMBER_WORDS_IN_DWORD];
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udword d;
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};
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/// Initial value.
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udword initial_value;
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/// Read-only flag.
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/// Writes are silently discarded if turned on.
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bool read_only;
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};
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