wdc-utils/disassembler.h

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#ifndef __disassembler_h__
#define __disassembler_h__
#include <stdint.h>
#include <string>
class disassembler {
public:
disassembler() = default;
virtual ~disassembler();
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void operator()(uint8_t byte);
void operator()(const std::string &expr, unsigned size);
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template<class Iter>
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void operator()(Iter begin, Iter end) { while (begin != end) code(*begin++); }
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template<class T>
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void operator()(const T &t) { code(std::begin(t), std::end(t)); }
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void space(unsigned bytes);
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bool m() const { return _flags & 0x20; }
bool x() const { return _flags & 0x10; }
void set_m(bool x) {
if (x) _flags |= 0x20;
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else _flags &= ~0x20;
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}
void set_x(bool x) {
if (x) _flags |= 0x10;
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else _flags &= ~0x10;
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}
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uint32_t pc() const { return _pc; }
void set_pc(uint32_t pc) { if (_pc != pc) { flush(); _pc = pc; } }
bool code() const { return _code; }
void set_code(bool code) { if (_code != code) { flush(); _code = code; } }
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void flush();
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void recalc_next_label() {
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_next_label = next_label(-1);
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}
static std::string to_x(uint32_t value, unsigned bytes, char prefix = 0);
static void emit(const std::string &label);
static void emit(const std::string &label, const std::string &opcode);
static void emit(const std::string &label, const std::string &opcode, const std::string &operand);
protected:
virtual int32_t next_label(int32_t pc) {
return -1;
}
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private:
void reset();
void dump();
void dump(const std::string &expr, unsigned size);
void print();
void print(const std::string &expr);
void print_prefix();
void print_suffix();
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std::string prefix();
std::string suffix();
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void hexdump();
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void hexdump(std::string &);
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unsigned _st = 0;
uint8_t _op = 0;
unsigned _size = 0;
unsigned _mode = 0;
uint8_t _bytes[4];
unsigned _flags = 0x30;
unsigned _pc = 0;
unsigned _arg = 0;
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bool _code = true;
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int32_t _next_label = -1;
void check_labels();
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};
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#endif