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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
drcbex86.h
32-bit x86 back-end for the universal machine language.
***************************************************************************/
#pragma once
#ifndef __DRCBEX86_H__
#define __DRCBEX86_H__
#include "drcuml.h"
#include "drcbeut.h"
#include "x86log.h"
#include "asmjit/src/asmjit/asmjit.h"
using namespace asmjit;
using namespace asmjit::x86;
namespace drc {
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class drcbe_x86 : public drcbe_interface
{
typedef uint32_t (*x86_entry_point_func)(x86code *entry);
public:
// construction/destruction
drcbe_x86(drcuml_state &drcuml, device_t &device, drc_cache &cache, uint32_t flags, int modes, int addrbits, int ignorebits);
virtual ~drcbe_x86();
// required overrides
virtual void reset() override;
virtual int execute(uml::code_handle &entry) override;
virtual void generate(drcuml_block &block, const uml::instruction *instlist, uint32_t numinst) override;
virtual bool hash_exists(uint32_t mode, uint32_t pc) override;
virtual void get_info(drcbe_info &info) override;
virtual bool logging() const override { return m_log != nullptr; }
private:
// HACK: leftover from x86emit
static int const REG_MAX = 16;
// a be_parameter is similar to a uml::parameter but maps to native registers/memory
class be_parameter
{
public:
// parameter types
enum be_parameter_type
{
PTYPE_NONE = 0, // invalid
PTYPE_IMMEDIATE, // immediate; value = sign-extended to 64 bits
PTYPE_INT_REGISTER, // integer register; value = 0-REG_MAX
PTYPE_FLOAT_REGISTER, // floating point register; value = 0-REG_MAX
PTYPE_VECTOR_REGISTER, // vector register; value = 0-REG_MAX
PTYPE_MEMORY, // memory; value = pointer to memory
PTYPE_MAX
};
// represents the value of a parameter
typedef uint64_t be_parameter_value;
// construction
be_parameter() : m_type(PTYPE_NONE), m_value(0) { }
be_parameter(be_parameter const ¶m) : m_type(param.m_type), m_value(param.m_value) { }
be_parameter(uint64_t val) : m_type(PTYPE_IMMEDIATE), m_value(val) { }
be_parameter(drcbe_x86 &drcbe, const uml::parameter ¶m, uint32_t allowed);
// creators for types that don't safely default
static inline be_parameter make_ireg(int regnum) { assert(regnum >= 0 && regnum < REG_MAX); return be_parameter(PTYPE_INT_REGISTER, regnum); }
static inline be_parameter make_freg(int regnum) { assert(regnum >= 0 && regnum < REG_MAX); return be_parameter(PTYPE_FLOAT_REGISTER, regnum); }
static inline be_parameter make_memory(void *base) { return be_parameter(PTYPE_MEMORY, reinterpret_cast<be_parameter_value>(base)); }
static inline be_parameter make_memory(const void *base) { return be_parameter(PTYPE_MEMORY, reinterpret_cast<be_parameter_value>(const_cast<void *>(base))); }
// operators
bool operator==(be_parameter const &rhs) const { return (m_type == rhs.m_type && m_value == rhs.m_value); }
bool operator!=(be_parameter const &rhs) const { return (m_type != rhs.m_type || m_value != rhs.m_value); }
// getters
be_parameter_type type() const { return m_type; }
uint64_t immediate() const { assert(m_type == PTYPE_IMMEDIATE); return m_value; }
uint32_t ireg() const { assert(m_type == PTYPE_INT_REGISTER); assert(m_value < REG_MAX); return m_value; }
uint32_t freg() const { assert(m_type == PTYPE_FLOAT_REGISTER); assert(m_value < REG_MAX); return m_value; }
void *memory(uint32_t offset = 0) const { assert(m_type == PTYPE_MEMORY); return reinterpret_cast<void *>(m_value + offset); }
// type queries
bool is_immediate() const { return (m_type == PTYPE_IMMEDIATE); }
bool is_int_register() const { return (m_type == PTYPE_INT_REGISTER); }
bool is_float_register() const { return (m_type == PTYPE_FLOAT_REGISTER); }
bool is_memory() const { return (m_type == PTYPE_MEMORY); }
// other queries
bool is_immediate_value(uint64_t value) const { return (m_type == PTYPE_IMMEDIATE && m_value == value); }
// helpers
Gp select_register(Gp const &defreg) const;
Xmm select_register(Xmm defreg) const;
template <typename T> T select_register(T defreg, be_parameter const &checkparam) const;
template <typename T> T select_register(T defreg, be_parameter const &checkparam, be_parameter const &checkparam2) const;
private:
// private constructor
be_parameter(be_parameter_type type, be_parameter_value value) : m_type(type), m_value(value) { }
// internals
be_parameter_type m_type; // parameter type
be_parameter_value m_value; // parameter value
};
// helpers
Mem MABS(void const *base, u32 const size = 0) const { return Mem(u64(base), size); }
void normalize_commutative(be_parameter &inner, be_parameter &outer);
void emit_combine_z_flags(Assembler &a);
void emit_combine_z_shl_flags(Assembler &a);
void reset_last_upper_lower_reg();
void set_last_lower_reg(Assembler &a, be_parameter const ¶m, Gp const ®lo);
void set_last_upper_reg(Assembler &a, be_parameter const ¶m, Gp const ®hi);
bool can_skip_lower_load(Assembler &a, uint32_t *memref, Gp const ®lo);
bool can_skip_upper_load(Assembler &a, uint32_t *memref, Gp const ®hi);
static void debug_log_hashjmp(int mode, offs_t pc);
// code generators
void op_handle(Assembler &a, const uml::instruction &inst);
void op_hash(Assembler &a, const uml::instruction &inst);
void op_label(Assembler &a, const uml::instruction &inst);
void op_comment(Assembler &a, const uml::instruction &inst);
void op_mapvar(Assembler &a, const uml::instruction &inst);
void op_nop(Assembler &a, const uml::instruction &inst);
void op_debug(Assembler &a, const uml::instruction &inst);
void op_exit(Assembler &a, const uml::instruction &inst);
void op_hashjmp(Assembler &a, const uml::instruction &inst);
void op_jmp(Assembler &a, const uml::instruction &inst);
void op_exh(Assembler &a, const uml::instruction &inst);
void op_callh(Assembler &a, const uml::instruction &inst);
void op_ret(Assembler &a, const uml::instruction &inst);
void op_callc(Assembler &a, const uml::instruction &inst);
void op_recover(Assembler &a, const uml::instruction &inst);
void op_setfmod(Assembler &a, const uml::instruction &inst);
void op_getfmod(Assembler &a, const uml::instruction &inst);
void op_getexp(Assembler &a, const uml::instruction &inst);
void op_getflgs(Assembler &a, const uml::instruction &inst);
void op_save(Assembler &a, const uml::instruction &inst);
void op_restore(Assembler &a, const uml::instruction &inst);
void op_load(Assembler &a, const uml::instruction &inst);
void op_loads(Assembler &a, const uml::instruction &inst);
void op_store(Assembler &a, const uml::instruction &inst);
void op_read(Assembler &a, const uml::instruction &inst);
void op_readm(Assembler &a, const uml::instruction &inst);
void op_write(Assembler &a, const uml::instruction &inst);
void op_writem(Assembler &a, const uml::instruction &inst);
void op_carry(Assembler &a, const uml::instruction &inst);
void op_set(Assembler &a, const uml::instruction &inst);
void op_mov(Assembler &a, const uml::instruction &inst);
void op_sext(Assembler &a, const uml::instruction &inst);
void op_roland(Assembler &a, const uml::instruction &inst);
void op_rolins(Assembler &a, const uml::instruction &inst);
void op_add(Assembler &a, const uml::instruction &inst);
void op_addc(Assembler &a, const uml::instruction &inst);
void op_sub(Assembler &a, const uml::instruction &inst);
void op_subc(Assembler &a, const uml::instruction &inst);
void op_cmp(Assembler &a, const uml::instruction &inst);
void op_mulu(Assembler &a, const uml::instruction &inst);
void op_muls(Assembler &a, const uml::instruction &inst);
void op_divu(Assembler &a, const uml::instruction &inst);
void op_divs(Assembler &a, const uml::instruction &inst);
void op_and(Assembler &a, const uml::instruction &inst);
void op_test(Assembler &a, const uml::instruction &inst);
void op_or(Assembler &a, const uml::instruction &inst);
void op_xor(Assembler &a, const uml::instruction &inst);
void op_lzcnt(Assembler &a, const uml::instruction &inst);
void op_tzcnt(Assembler &a, const uml::instruction &inst);
void op_bswap(Assembler &a, const uml::instruction &inst);
void op_shl(Assembler &a, const uml::instruction &inst);
void op_shr(Assembler &a, const uml::instruction &inst);
void op_sar(Assembler &a, const uml::instruction &inst);
void op_ror(Assembler &a, const uml::instruction &inst);
void op_rol(Assembler &a, const uml::instruction &inst);
void op_rorc(Assembler &a, const uml::instruction &inst);
void op_rolc(Assembler &a, const uml::instruction &inst);
void op_fload(Assembler &a, const uml::instruction &inst);
void op_fstore(Assembler &a, const uml::instruction &inst);
void op_fread(Assembler &a, const uml::instruction &inst);
void op_fwrite(Assembler &a, const uml::instruction &inst);
void op_fmov(Assembler &a, const uml::instruction &inst);
void op_ftoint(Assembler &a, const uml::instruction &inst);
void op_ffrint(Assembler &a, const uml::instruction &inst);
void op_ffrflt(Assembler &a, const uml::instruction &inst);
void op_frnds(Assembler &a, const uml::instruction &inst);
void op_fadd(Assembler &a, const uml::instruction &inst);
void op_fsub(Assembler &a, const uml::instruction &inst);
void op_fcmp(Assembler &a, const uml::instruction &inst);
void op_fmul(Assembler &a, const uml::instruction &inst);
void op_fdiv(Assembler &a, const uml::instruction &inst);
void op_fneg(Assembler &a, const uml::instruction &inst);
void op_fabs(Assembler &a, const uml::instruction &inst);
void op_fsqrt(Assembler &a, const uml::instruction &inst);
void op_frecip(Assembler &a, const uml::instruction &inst);
void op_frsqrt(Assembler &a, const uml::instruction &inst);
void op_fcopyi(Assembler &a, const uml::instruction &inst);
void op_icopyf(Assembler &a, const uml::instruction &inst);
// 32-bit code emission helpers
void emit_mov_r32_p32(Assembler &a, Gp const ®, be_parameter const ¶m);
void emit_mov_r32_p32_keepflags(Assembler &a, Gp const ®, be_parameter const ¶m);
void emit_mov_m32_p32(Assembler &a, Mem memref, be_parameter const ¶m);
void emit_mov_p32_r32(Assembler &a, be_parameter const ¶m, Gp const ®);
void alu_op_param(Assembler &a, Inst::Id const opcode, Operand const &dst, be_parameter const ¶m, std::function<bool(Assembler &a, Operand const &dst, be_parameter const &src)> optimize = [](Assembler &a, Operand dst, be_parameter const &src) { return false; });
void shift_op_param(Assembler &a, Inst::Id const opcode, Operand const &dst, be_parameter const ¶m, std::function<bool(Assembler &a, Operand const &dst, be_parameter const &src)> optimize);
// 64-bit code emission helpers
void emit_mov_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m);
void emit_mov_r64_p64_keepflags(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m);
void emit_mov_m64_p64(Assembler &a, Mem const &memref, be_parameter const ¶m);
void emit_mov_p64_r64(Assembler &a, be_parameter const ¶m, Gp const ®lo, Gp const ®hi);
void emit_and_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_and_m64_p64(Assembler &a, Mem const &memref_lo, Mem const &memref_hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_or_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_or_m64_p64(Assembler &a, Mem const &memref_lo, Mem const &memref_hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_xor_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_xor_m64_p64(Assembler &a, Mem const &memref_lo, Mem const &memref_hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_shl_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_shr_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_sar_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_rol_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_ror_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_rcl_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void emit_rcr_r64_p64(Assembler &a, Gp const ®lo, Gp const ®hi, be_parameter const ¶m, const uml::instruction &inst);
void alu_op_param(Assembler &a, Inst::Id const opcode_lo, Inst::Id const opcode_hi, Gp const &lo, Gp const &hi, be_parameter const ¶m, bool const saveflags);
void alu_op_param(Assembler &a, Inst::Id const opcode_lo, Inst::Id const opcode_hi, Mem const &lo, Mem const &hi, be_parameter const ¶m, bool const saveflags);
// floating-point code emission helpers
void emit_fld_p(Assembler &a, int size, be_parameter const ¶m);
void emit_fstp_p(Assembler &a, int size, be_parameter const ¶m);
// callback helpers
static int dmulu(uint64_t &dstlo, uint64_t &dsthi, uint64_t src1, uint64_t src2, bool flags);
static int dmuls(uint64_t &dstlo, uint64_t &dsthi, int64_t src1, int64_t src2, bool flags);
static int ddivu(uint64_t &dstlo, uint64_t &dsthi, uint64_t src1, uint64_t src2);
static int ddivs(uint64_t &dstlo, uint64_t &dsthi, int64_t src1, int64_t src2);
size_t emit(CodeHolder &ch);
// internal state
drc_hash_table m_hash; // hash table state
drc_map_variables m_map; // code map
x86log_context * m_log; // logging
FILE * m_log_asmjit;
bool m_logged_common; // logged common code already?
bool const m_sse3; // do we have SSE3 support?
x86_entry_point_func m_entry; // entry point
x86code * m_exit; // exit point
x86code * m_nocode; // nocode handler
x86code * m_save; // save handler
x86code * m_restore; // restore handler
uint32_t * m_reglo[REG_MAX]; // pointer to low part of data for each register
uint32_t * m_reghi[REG_MAX]; // pointer to high part of data for each register
Gp m_last_lower_reg; // last register we stored a lower from
x86code * m_last_lower_pc; // PC after instruction where we last stored a lower register
uint32_t * m_last_lower_addr; // address where we last stored an lower register
Gp m_last_upper_reg; // last register we stored an upper from
x86code * m_last_upper_pc; // PC after instruction where we last stored an upper register
uint32_t * m_last_upper_addr; // address where we last stored an upper register
double m_fptemp; // temporary storage for floating point
uint16_t m_fpumode; // saved FPU mode
uint16_t m_fmodesave; // temporary location for saving
void * m_stacksave; // saved stack pointer
void * m_hashstacksave; // saved stack pointer for hashjmp
uint64_t m_reslo; // extended low result
uint64_t m_reshi; // extended high result
// globals
typedef void (drcbe_x86::*opcode_generate_func)(Assembler &a, const uml::instruction &inst);
struct opcode_table_entry
{
uml::opcode_t opcode; // opcode in question
opcode_generate_func func; // function pointer to the work
};
static const opcode_table_entry s_opcode_table_source[];
static opcode_generate_func s_opcode_table[uml::OP_MAX];
};
} // namespace drc
using drc::drcbe_x86;
#endif /* __DRCBEX86_H__ */
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