Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-06-07 13:23:50 +03:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity

ns32000dasm: rewrite

Browse Source 
* simplified/consolidated logic
* corrected scaled mode decoding
This commit is contained in:
Patrick Mackinlay 2021-07-16 15:31:35 +07:00
parent 37e4c7d146
commit 29e2393076
2 changed files with 581 additions and 1017 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1464
src/devices/cpu/ns32000/ns32000dasm.cpp
View File

File diff suppressed because it is too large Load Diff

134
src/devices/cpu/ns32000/ns32000dasm.h
View File

@ -1,12 +1,5 @@
// license:BSD-3-Clause // license:BSD-3-Clause
// copyright-holders:Nigel Barnes // copyright-holders:Patrick Mackinlay
/*****************************************************************************
*
* ns32000dasm.cpp
*
* NS32000 CPU Disassembly
*
*****************************************************************************/
#ifndef MAME_CPU_NS32000_NS32000DASM_H #ifndef MAME_CPU_NS32000_NS32000DASM_H
#define MAME_CPU_NS32000_NS32000DASM_H #define MAME_CPU_NS32000_NS32000DASM_H
@ -16,113 +9,42 @@
class ns32000_disassembler : public util::disasm_interface class ns32000_disassembler : public util::disasm_interface
{ {
public: public:
ns32000_disassembler() = default; ns32000_disassembler() = default;
virtual ~ns32000_disassembler() = default; virtual ~ns32000_disassembler() = default;
virtual u32 opcode_alignment() const override { return 1; } virtual u32 opcode_alignment() const override { return 1; }
virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override; virtual offs_t disassemble(std::ostream &stream, offs_t pc, data_buffer const &opcodes, data_buffer const &params) override;
private: protected:
/* implied operand attributes */ enum size_code : unsigned
enum
{ {
REG = 16, SIZE_B = 0,
QUICK, SIZE_W = 1,
SHORT, SIZE_D = 3,
IMM, SIZE_Q = 7,
DISP,
GEN,
OPTIONS,
}; };
/* access classes */
enum struct addr_mode
{ {
READ = 8, addr_mode(unsigned gen)
WRITE, : gen(gen)
RMW, , fpu(false)
ADDR, , mode()
REGADDR {};
};
/* length attributes */ void size_i(size_code code) { size = code; }
enum void size_f(size_code code) { size = code; fpu = true; }
{
B = 0, unsigned gen;
W = 1, size_code size;
D = 3, bool fpu;
I,
I2, std::string mode;
F,
L
};
struct NS32000_OPCODE {
const char *mnemonic;
u32 operand1;
u32 operand;
u32 operand3;
u32 operand4;
offs_t dasm_flags;
}; };
enum class operand_class s32 displacement(offs_t pc, data_buffer const &opcodes, unsigned &bytes);
{ void decode(addr_mode *mode, offs_t pc, data_buffer const &opcodes, unsigned &bytes);
SOURCE, std::string reglist(u8 imm);
BITPOS,
DESTINATION,
ADDRESS,
SCALED_INDEX
};
static const NS32000_OPCODE format0_op[1];
static const NS32000_OPCODE format1_op[16];
static const NS32000_OPCODE format2_op[8];
static const NS32000_OPCODE format3_op[16];
static const NS32000_OPCODE format4_op[16];
static const NS32000_OPCODE format5_op[16];
static const NS32000_OPCODE format6_op[16];
static const NS32000_OPCODE format7_op[16];
static const NS32000_OPCODE format8_op[16];
static const NS32000_OPCODE format9_op[16];
static const NS32000_OPCODE format11_op[16];
static const NS32000_OPCODE format14_op[16];
static char const *const Format0[];
static char const *const Format1[];
static char const *const Format2[];
static char const *const Format3[];
static char const *const Format4[];
static char const *const Format5[];
static char const *const Format6[];
static char const *const Format7[];
static char const *const Format8[];
static char const *const Format9[];
static char const *const Format11[];
static char const *const Format14[];
static char const *const iType[];
static char const *const fType[];
static char const *const cType[];
static char const *const indexSize[];
static char const *const cond[];
static char const *const areg[];
static char const *const mreg[];
static char const *const R[];
static char const *const M[];
static char const *const PR[];
static char const *const FP[];
std::string mnemonic_index(std::string form, const std::string &itype, const std::string &ftype);
uint8_t opcode_format(uint8_t byte);
int8_t short2int(uint8_t val);
static inline int32_t get_disp(offs_t &pc, const data_buffer &opcodes);
static inline std::string format_disp(int32_t disp);
static inline std::string get_option_list(uint8_t cfg);
static inline std::string get_options(uint8_t opts);
static inline std::string get_reg_list(offs_t &pc, const data_buffer &opcodes, bool reverse);
void stream_gen(std::ostream &stream, u8 gen_addr, u8 op_len, operand_class op_class, offs_t &pc, const data_buffer &opcodes, bool fpreg = false);
u32 m_base_pc;
}; };
#endif #endif // MAME_CPU_NS32000_NS32000DASM_H