// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** uml.c Universal machine language definitions and classes. **************************************************************************** Future improvements/changes: * UML optimizer: - constant folding * Write a back-end validator: - checks all combinations of memory/register/immediate on all params - checks behavior of all opcodes * Extend registers to 16? Depends on if PPC can use them * Support for FPU exceptions * New instructions? - VALID opcode_desc,handle,param checksum/compare code referenced by opcode_desc; if not matching, generate exception with handle,param - RECALL handle change code at caller to call handle in the future ***************************************************************************/ #include "emu.h" #include "drcuml.h" #include "drcumlsh.h" using namespace uml; //************************************************************************** // DEBUGGING //************************************************************************** #define VALIDATE_BACKEND (0) #define LOG_SIMPLIFICATIONS (0) //************************************************************************** // CONSTANTS //************************************************************************** // opcode validation condition/flag valid bitmasks #define OPFLAGS_NONE 0x00 #define OPFLAGS_C FLAG_C #define OPFLAGS_SZ (FLAG_S | FLAG_Z) #define OPFLAGS_SZC (FLAG_S | FLAG_Z | FLAG_C) #define OPFLAGS_SZV (FLAG_S | FLAG_Z | FLAG_V) #define OPFLAGS_SZVC (FLAG_S | FLAG_Z | FLAG_V | FLAG_C) #define OPFLAGS_UZC (FLAG_U | FLAG_Z | FLAG_C) #define OPFLAGS_ALL 0x1f #define OPFLAGS_P1 0x81 #define OPFLAGS_P2 0x82 #define OPFLAGS_P3 0x83 #define OPFLAGS_P4 0x84 // parameter input/output states #define PIO_IN 0x01 #define PIO_OUT 0x02 #define PIO_INOUT (PIO_IN | PIO_OUT) // parameter sizes #define PSIZE_4 SIZE_DWORD #define PSIZE_8 SIZE_QWORD #define PSIZE_OP 0x80 #define PSIZE_P1 0x81 #define PSIZE_P2 0x82 #define PSIZE_P3 0x83 #define PSIZE_P4 0x84 // basic parameter types #define PTYPES_NONE 0 #define PTYPES_IMM (1 << parameter::PTYPE_IMMEDIATE) #define PTYPES_IREG (1 << parameter::PTYPE_INT_REGISTER) #define PTYPES_FREG (1 << parameter::PTYPE_FLOAT_REGISTER) #define PTYPES_VREG (1 << parameter::PTYPE_VECTOR_REGISTER) #define PTYPES_MVAR (1 << parameter::PTYPE_MAPVAR) #define PTYPES_MEM (1 << parameter::PTYPE_MEMORY) #define PTYPES_SIZE (1 << parameter::PTYPE_SIZE) #define PTYPES_SCSIZE (1 << parameter::PTYPE_SIZE_SCALE) #define PTYPES_SPSIZE (1 << parameter::PTYPE_SIZE_SPACE) #define PTYPES_HANDLE (1 << parameter::PTYPE_CODE_HANDLE) #define PTYPES_LABEL (1 << parameter::PTYPE_CODE_LABEL) #define PTYPES_CFUNC (1 << parameter::PTYPE_C_FUNCTION) #define PTYPES_ROUND (1 << parameter::PTYPE_ROUNDING) #define PTYPES_STR (1 << parameter::PTYPE_STRING) // special parameter types #define PTYPES_PTR (PTYPES_MEM | 0x1000) #define PTYPES_STATE (PTYPES_MEM | 0x2000) // combinations of types #define PTYPES_IRM (PTYPES_IREG | PTYPES_MEM) #define PTYPES_FRM (PTYPES_FREG | PTYPES_MEM) #define PTYPES_IMV (PTYPES_IMM | PTYPES_MVAR) #define PTYPES_IANY (PTYPES_IRM | PTYPES_IMV) #define PTYPES_FANY (PTYPES_FRM) //************************************************************************** // TABLES //************************************************************************** // macro to simplify the table #define PINFO(inout, size, types) { PIO_##inout, PSIZE_##size, PTYPES_##types } #define OPINFO0(op,str,sizes,cond,iflag,oflag,mflag) { OP_##op, str, sizes, cond, OPFLAGS_##iflag, OPFLAGS_##oflag, OPFLAGS_##mflag, { { 0 } } }, #define OPINFO1(op,str,sizes,cond,iflag,oflag,mflag,p0) { OP_##op, str, sizes, cond, OPFLAGS_##iflag, OPFLAGS_##oflag, OPFLAGS_##mflag, { p0 } }, #define OPINFO2(op,str,sizes,cond,iflag,oflag,mflag,p0,p1) { OP_##op, str, sizes, cond, OPFLAGS_##iflag, OPFLAGS_##oflag, OPFLAGS_##mflag, { p0, p1 } }, #define OPINFO3(op,str,sizes,cond,iflag,oflag,mflag,p0,p1,p2) { OP_##op, str, sizes, cond, OPFLAGS_##iflag, OPFLAGS_##oflag, OPFLAGS_##mflag, { p0, p1, p2 } }, #define OPINFO4(op,str,sizes,cond,iflag,oflag,mflag,p0,p1,p2,p3) { OP_##op, str, sizes, cond, OPFLAGS_##iflag, OPFLAGS_##oflag, OPFLAGS_##mflag, { p0, p1, p2, p3 } }, // opcode validation table const opcode_info instruction::s_opcode_info_table[OP_MAX] = { OPINFO0(INVALID, "invalid", 4, false, NONE, NONE, NONE) // Compile-time opcodes OPINFO1(HANDLE, "handle", 4, false, NONE, NONE, NONE, PINFO(IN, OP, HANDLE)) OPINFO2(HASH, "hash", 4, false, NONE, NONE, NONE, PINFO(IN, OP, IMV), PINFO(IN, OP, IMV)) OPINFO1(LABEL, "label", 4, false, NONE, NONE, NONE, PINFO(IN, OP, LABEL)) OPINFO1(COMMENT, "comment", 4, false, NONE, NONE, NONE, PINFO(IN, OP, STR)) OPINFO2(MAPVAR, "mapvar", 4, false, NONE, NONE, NONE, PINFO(OUT, OP, MVAR), PINFO(IN, OP, IMV)) // Control Flow Operations OPINFO0(NOP, "nop", 4, false, NONE, NONE, NONE) OPINFO1(DEBUG, "debug", 4, false, NONE, NONE, ALL, PINFO(IN, OP, IANY)) OPINFO1(EXIT, "exit", 4, true, NONE, NONE, ALL, PINFO(IN, OP, IANY)) OPINFO3(HASHJMP, "hashjmp", 4, false, NONE, NONE, ALL, PINFO(IN, OP, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, HANDLE)) OPINFO1(JMP, "jmp", 4, true, NONE, NONE, NONE, PINFO(IN, OP, LABEL)) OPINFO2(EXH, "exh", 4, true, NONE, NONE, ALL, PINFO(IN, OP, HANDLE), PINFO(IN, OP, IANY)) OPINFO1(CALLH, "callh", 4, true, NONE, NONE, ALL, PINFO(IN, OP, HANDLE)) OPINFO0(RET, "ret", 4, true, NONE, NONE, ALL) OPINFO2(CALLC, "callc", 4, true, NONE, NONE, ALL, PINFO(IN, OP, CFUNC), PINFO(IN, OP, PTR)) OPINFO2(RECOVER, "recover", 4, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, MVAR)) // Internal Register Operations OPINFO1(SETFMOD, "setfmod", 4, false, NONE, NONE, ALL, PINFO(IN, OP, IANY)) OPINFO1(GETFMOD, "getfmod", 4, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM)) OPINFO1(GETEXP, "getexp", 4, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM)) OPINFO2(GETFLGS, "getflgs", 4, false, P2, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IMV)) OPINFO1(SAVE, "save", 4, false, ALL, NONE, ALL, PINFO(OUT, OP, STATE)) OPINFO1(RESTORE, "restore", 4, false, NONE, ALL, ALL, PINFO(IN, OP, STATE)) // Integer Operations OPINFO4(LOAD, "!load", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, PTR), PINFO(IN, 4, IANY), PINFO(IN, OP, SCSIZE)) OPINFO4(LOADS, "!loads", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, PTR), PINFO(IN, 4, IANY), PINFO(IN, OP, SCSIZE)) OPINFO4(STORE, "!store", 4|8, false, NONE, NONE, ALL, PINFO(IN, OP, PTR), PINFO(IN, 4, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, SCSIZE)) OPINFO3(READ, "!read", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, 4, IANY), PINFO(IN, OP, SPSIZE)) OPINFO4(READM, "!readm", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, IRM), PINFO(IN, 4, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, SPSIZE)) OPINFO3(WRITE, "!write", 4|8, false, NONE, NONE, ALL, PINFO(IN, 4, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, SPSIZE)) OPINFO4(WRITEM, "!writem", 4|8, false, NONE, NONE, ALL, PINFO(IN, 4, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, SPSIZE)) OPINFO2(CARRY, "!carry", 4|8, false, NONE, C, ALL, PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO1(SET, "!set", 4|8, true, NONE, NONE, ALL, PINFO(OUT, OP, IRM)) OPINFO2(MOV, "!mov", 4|8, true, NONE, NONE, NONE, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY)) OPINFO3(SEXT, "!sext", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, P3, IANY), PINFO(IN, OP, SIZE)) OPINFO4(ROLAND, "!roland", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO4(ROLINS, "!rolins", 4|8, false, NONE, SZ, ALL, PINFO(INOUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(ADD, "!add", 4|8, false, NONE, SZVC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(ADDC, "!addc", 4|8, false, C, SZVC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(SUB, "!sub", 4|8, false, NONE, SZVC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(SUBB, "!subb", 4|8, false, C, SZVC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO2(CMP, "!cmp", 4|8, false, NONE, SZVC, ALL, PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO4(MULU, "!mulu", 4|8, false, NONE, SZV, ALL, PINFO(OUT, OP, IRM), PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO4(MULS, "!muls", 4|8, false, NONE, SZV, ALL, PINFO(OUT, OP, IRM), PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO4(DIVU, "!divu", 4|8, false, NONE, SZV, ALL, PINFO(OUT, OP, IRM), PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO4(DIVS, "!divs", 4|8, false, NONE, SZV, ALL, PINFO(OUT, OP, IRM), PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(AND, "!and", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO2(TEST, "!test", 4|8, false, NONE, SZ, ALL, PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(OR, "!or", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(XOR, "!xor", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO2(LZCNT, "!lzcnt", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY)) OPINFO2(BSWAP, "!bswap", 4|8, false, NONE, SZ, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY)) OPINFO3(SHL, "!shl", 4|8, false, NONE, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(SHR, "!shr", 4|8, false, NONE, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(SAR, "!sar", 4|8, false, NONE, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(ROL, "!rol", 4|8, false, NONE, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(ROLC, "!rolc", 4|8, false, C, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(ROR, "!ror", 4|8, false, NONE, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) OPINFO3(RORC, "!rorc", 4|8, false, C, SZC, ALL, PINFO(OUT, OP, IRM), PINFO(IN, OP, IANY), PINFO(IN, OP, IANY)) // Floating Point Operations OPINFO3(FLOAD, "f#load", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, PTR), PINFO(IN, 4, IANY)) OPINFO3(FSTORE, "f#store", 4|8, false, NONE, NONE, ALL, PINFO(IN, OP, PTR), PINFO(IN, 4, IANY), PINFO(IN, OP, FRM)) OPINFO3(FREAD, "f#read", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, 4, IANY), PINFO(IN, OP, SPSIZE)) OPINFO3(FWRITE, "f#write", 4|8, false, NONE, NONE, ALL, PINFO(IN, 4, IANY), PINFO(IN, OP, FANY), PINFO(IN, OP, SPSIZE)) OPINFO2(FMOV, "f#mov", 4|8, true, NONE, NONE, NONE, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO4(FTOINT, "f#toint", 4|8, false, NONE, NONE, ALL, PINFO(OUT, P3, IRM), PINFO(IN, OP, FANY), PINFO(IN, OP, SIZE), PINFO(IN, OP, ROUND)) OPINFO3(FFRINT, "f#frint", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, P3, IANY), PINFO(IN, OP, SIZE)) OPINFO3(FFRFLT, "f#frflt", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, P3, FANY), PINFO(IN, OP, SIZE)) OPINFO2(FRNDS, "f#rnds", 8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, P3, FANY)) OPINFO3(FADD, "f#add", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY), PINFO(IN, OP, FANY)) OPINFO3(FSUB, "f#sub", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY), PINFO(IN, OP, FANY)) OPINFO2(FCMP, "f#cmp", 4|8, false, NONE, UZC, ALL, PINFO(IN, OP, FANY), PINFO(IN, OP, FANY)) OPINFO3(FMUL, "f#mul", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY), PINFO(IN, OP, FANY)) OPINFO3(FDIV, "f#div", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY), PINFO(IN, OP, FANY)) OPINFO2(FNEG, "f#neg", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO2(FABS, "f#abs", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO2(FSQRT, "f#sqrt", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO2(FRECIP, "f#recip", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO2(FRSQRT, "f#rsqrt", 4|8, false, NONE, NONE, ALL, PINFO(OUT, OP, FRM), PINFO(IN, OP, FANY)) OPINFO2(FCOPYI, "f#copyi", 4|8, false, NONE, NONE, NONE, PINFO(OUT, OP, FRM), PINFO(IN, OP, IRM)) OPINFO2(ICOPYF, "icopyf#", 4|8, false, NONE, NONE, NONE, PINFO(OUT, OP, IRM), PINFO(IN, OP, FRM)) }; //************************************************************************** // INLINE FUNCTIONS //************************************************************************** //------------------------------------------------- // rol32 - perform a 32-bit left rotate //------------------------------------------------- inline UINT32 rol32(UINT32 source, UINT8 count) { count &= 31; return (source << count) | (source >> (32 - count)); } //------------------------------------------------- // rol64 - perform a 64-bit left rotate //------------------------------------------------- inline UINT64 rol64(UINT64 source, UINT8 count) { count &= 63; return (source << count) | (source >> (64 - count)); } //************************************************************************** // UML CODE HANDLE //************************************************************************** //------------------------------------------------- // code_handle - constructor //------------------------------------------------- uml::code_handle::code_handle(drcuml_state &drcuml, const char *name) : m_code(reinterpret_cast(drcuml.cache().alloc_near(sizeof(drccodeptr)))), m_string(name), m_next(nullptr), m_drcuml(drcuml) { if (m_code == nullptr) throw std::bad_alloc(); *m_code = nullptr; } //------------------------------------------------- // set_codeptr - set a new code pointer //------------------------------------------------- void uml::code_handle::set_codeptr(drccodeptr code) { assert(*m_code == nullptr); assert_in_cache(m_drcuml.cache(), code); *m_code = code; } //************************************************************************** // UML INSTRUCTION //************************************************************************** //------------------------------------------------- // instruction - constructor //------------------------------------------------- uml::instruction::instruction() : m_opcode(OP_INVALID), m_condition(COND_ALWAYS), m_flags(0), m_size(4), m_numparams(0) { } //------------------------------------------------- // configure - configure an opcode with no // parameters //------------------------------------------------- void uml::instruction::configure(opcode_t op, UINT8 size, condition_t condition) { // fill in the instruction m_opcode = (opcode_t)(UINT8)op; m_size = size; m_condition = condition; m_flags = 0; m_numparams = 0; // validate validate(); } //------------------------------------------------- // configure - configure an opcode with 1 // parameter //------------------------------------------------- void uml::instruction::configure(opcode_t op, UINT8 size, parameter p0, condition_t condition) { // fill in the instruction m_opcode = (opcode_t)(UINT8)op; m_size = size; m_condition = condition; m_flags = 0; m_numparams = 1; m_param[0] = p0; // validate validate(); } //------------------------------------------------- // configure - configure an opcode with 2 // parameters //------------------------------------------------- void uml::instruction::configure(opcode_t op, UINT8 size, parameter p0, parameter p1, condition_t condition) { // fill in the instruction m_opcode = (opcode_t)(UINT8)op; m_size = size; m_condition = condition; m_flags = 0; m_numparams = 2; m_param[0] = p0; m_param[1] = p1; // validate validate(); } //------------------------------------------------- // configure - configure an opcode with 3 // parameters //------------------------------------------------- void uml::instruction::configure(opcode_t op, UINT8 size, parameter p0, parameter p1, parameter p2, condition_t condition) { // fill in the instruction m_opcode = (opcode_t)(UINT8)op; m_size = size; m_condition = condition; m_flags = 0; m_numparams = 3; m_param[0] = p0; m_param[1] = p1; m_param[2] = p2; // validate validate(); } //------------------------------------------------- // configure - configure an opcode with 4 // parameters //------------------------------------------------- void uml::instruction::configure(opcode_t op, UINT8 size, parameter p0, parameter p1, parameter p2, parameter p3, condition_t condition) { // fill in the instruction m_opcode = (opcode_t)(UINT8)op; m_size = size; m_condition = condition; m_flags = 0; m_numparams = 4; m_param[0] = p0; m_param[1] = p1; m_param[2] = p2; m_param[3] = p3; // validate validate(); } //------------------------------------------------- // simplify - simplify instructions that have // immediate values we can evaluate at compile // time //------------------------------------------------- void uml::instruction::simplify() { // can't simplify if flags are in play if (m_flags != 0) return; static const UINT64 instsizemask[] = { 0, 0, 0, 0, 0xffffffff, 0, 0, 0, U64(0xffffffffffffffff) }; static const UINT64 paramsizemask[] = { 0xff, 0xffff, 0xffffffff, U64(0xffffffffffffffff) }; // loop until we've simplified all we can opcode_t origop; do { // switch off the opcode origop = m_opcode; switch (m_opcode) { // READM: convert to READ if the mask is wide open case OP_READM: if (m_param[2].is_immediate_value(paramsizemask[m_param[3].size()])) { m_opcode = OP_READ; m_numparams = 2; m_param[2] = m_param[3]; } break; // WRITEM: convert to WRITE if the mask is wide open case OP_WRITEM: if (m_param[2].is_immediate_value(paramsizemask[m_param[3].size()])) { m_opcode = OP_WRITE; m_numparams = 2; m_param[2] = m_param[3]; } break; // SET: convert to MOV if constant condition case OP_SET: if (m_condition == COND_ALWAYS) convert_to_mov_immediate(1); break; // MOV: convert to NOP if move-to-self case OP_MOV: if (m_param[0] == m_param[1]) nop(); break; // SEXT: convert immediates to MOV case OP_SEXT: if (m_param[1].is_immediate()) switch (m_param[2].size()) { case SIZE_BYTE: convert_to_mov_immediate((INT8)m_param[1].immediate()); break; case SIZE_WORD: convert_to_mov_immediate((INT16)m_param[1].immediate()); break; case SIZE_DWORD: convert_to_mov_immediate((INT32)m_param[1].immediate()); break; case SIZE_QWORD: convert_to_mov_immediate((INT64)m_param[1].immediate()); break; case SIZE_DQWORD: fatalerror("Invalid SEXT target size\n"); } break; // ROLAND: convert to MOV if all immediate, or to ROL or AND if one is not needed, or to SHL/SHR if the mask is right case OP_ROLAND: if (m_param[1].is_immediate() && m_param[2].is_immediate() && m_param[3].is_immediate()) { assert(m_size == 4 || m_size == 8); if (m_size == 4) convert_to_mov_immediate(rol32(m_param[1].immediate(), m_param[2].immediate()) & m_param[3].immediate()); else convert_to_mov_immediate(rol64(m_param[1].immediate(), m_param[2].immediate()) & m_param[3].immediate()); } else if (m_param[2].is_immediate_value(0)) { m_opcode = OP_AND; m_numparams = 3; m_param[2] = m_param[3]; } else if (m_param[3].is_immediate_value(instsizemask[m_size])) { m_opcode = OP_ROL; m_numparams = 3; } else if (m_param[2].is_immediate() && m_param[3].is_immediate_value((U64(0xffffffffffffffff) << m_param[2].immediate()) & instsizemask[m_size])) { m_opcode = OP_SHL; m_numparams = 3; } else if (m_param[2].is_immediate() && m_param[3].is_immediate_value(instsizemask[m_size] >> (8 * m_size - m_param[2].immediate()))) { m_opcode = OP_SHR; m_numparams = 3; m_param[2] = 8 * m_size - m_param[2].immediate(); } break; // ROLINS: convert to ROLAND if the mask is full case OP_ROLINS: if (m_param[3].is_immediate_value(instsizemask[m_size])) m_opcode = OP_ROLAND; break; // ADD: convert to MOV if immediate, or if adding 0 case OP_ADD: if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() + m_param[2].immediate()); else if (m_param[1].is_immediate_value(0)) convert_to_mov_param(2); else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // SUB: convert to MOV if immediate, or if subtracting 0 case OP_SUB: if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() - m_param[2].immediate()); else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // CMP: no-op if no flags needed, compare i0 to i0 if the parameters are equal case OP_CMP: if (m_flags == 0) nop(); else if (m_param[0] == m_param[1]) cmp(I0, I0); break; // MULU: convert simple form to MOV if immediate, or if multiplying by 0 case OP_MULU: if (m_param[0] == m_param[1]) { if (m_param[2].is_immediate_value(0) || m_param[3].is_immediate_value(0)) convert_to_mov_immediate(0); else if (m_param[2].is_immediate() && m_param[3].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((UINT32)((UINT32)m_param[1].immediate() * (UINT32)m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate((UINT64)((UINT64)m_param[1].immediate() * (UINT64)m_param[2].immediate())); } } break; // MULS: convert simple form to MOV if immediate, or if multiplying by 0 case OP_MULS: if (m_param[0] == m_param[1]) { if (m_param[2].is_immediate_value(0) || m_param[3].is_immediate_value(0)) convert_to_mov_immediate(0); else if (m_param[2].is_immediate() && m_param[3].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((INT32)((INT32)m_param[1].immediate() * (INT32)m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate((INT64)((INT64)m_param[1].immediate() * (INT64)m_param[2].immediate())); } } break; // DIVU: convert simple form to MOV if immediate, or if dividing with 0 case OP_DIVU: if (m_param[0] == m_param[1] && !m_param[3].is_immediate_value(0)) { if (m_param[2].is_immediate_value(0)) convert_to_mov_immediate(0); else if (m_param[2].is_immediate() && m_param[3].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((UINT32)((UINT32)m_param[1].immediate() / (UINT32)m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate((UINT64)((UINT64)m_param[1].immediate() / (UINT64)m_param[2].immediate())); } } break; // DIVS: convert simple form to MOV if immediate, or if dividing with 0 case OP_DIVS: if (m_param[0] == m_param[1] && !m_param[3].is_immediate_value(0)) { if (m_param[2].is_immediate_value(0)) convert_to_mov_immediate(0); else if (m_param[2].is_immediate() && m_param[3].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((INT32)((INT32)m_param[1].immediate() / (INT32)m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate((INT64)((INT64)m_param[1].immediate() / (INT64)m_param[2].immediate())); } } break; // AND: convert to MOV if immediate, or if anding against 0 or 0xffffffff case OP_AND: if (m_param[1].is_immediate_value(0) || m_param[2].is_immediate_value(0)) convert_to_mov_immediate(0); else if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() & m_param[2].immediate()); else if (m_param[1].is_immediate_value(instsizemask[m_size])) convert_to_mov_param(2); else if (m_param[2].is_immediate_value(instsizemask[m_size])) convert_to_mov_param(1); break; // TEST: no-op if no flags needed case OP_TEST: if (m_flags == 0) nop(); break; // OR: convert to MOV if immediate, or if oring against 0 or 0xffffffff case OP_OR: if (m_param[1].is_immediate_value(instsizemask[m_size]) || m_param[2].is_immediate_value(instsizemask[m_size])) convert_to_mov_immediate(instsizemask[m_size]); else if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() | m_param[2].immediate()); else if (m_param[1].is_immediate_value(0)) convert_to_mov_param(2); else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // XOR: convert to MOV if immediate, or if xoring against 0 case OP_XOR: if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() ^ m_param[2].immediate()); else if (m_param[1].is_immediate_value(0)) convert_to_mov_param(2); else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // LZCNT: convert to MOV if immediate case OP_LZCNT: if (m_param[1].is_immediate()) { if (m_size == 4) convert_to_mov_immediate(count_leading_zeros(m_param[1].immediate())); else if (m_size == 8) { if ((m_param[1].immediate() >> 32) == 0) convert_to_mov_immediate(32 + count_leading_zeros(m_param[1].immediate())); else convert_to_mov_immediate(count_leading_zeros(m_param[1].immediate() >> 32)); } } break; // BSWAP: convert to MOV if immediate case OP_BSWAP: if (m_param[1].is_immediate()) { if (m_size == 4) convert_to_mov_immediate(FLIPENDIAN_INT32(m_param[1].immediate())); else if (m_size == 8) convert_to_mov_immediate(FLIPENDIAN_INT64(m_param[1].immediate())); } break; // SHL: convert to MOV if immediate or shifting by 0 case OP_SHL: if (m_param[1].is_immediate() && m_param[2].is_immediate()) convert_to_mov_immediate(m_param[1].immediate() << m_param[2].immediate()); else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // SHR: convert to MOV if immediate or shifting by 0 case OP_SHR: if (m_param[1].is_immediate() && m_param[2].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((UINT32)m_param[1].immediate() >> m_param[2].immediate()); else if (m_size == 8) convert_to_mov_immediate((UINT64)m_param[1].immediate() >> m_param[2].immediate()); } else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // SAR: convert to MOV if immediate or shifting by 0 case OP_SAR: if (m_param[1].is_immediate() && m_param[2].is_immediate()) { if (m_size == 4) convert_to_mov_immediate((INT32)m_param[1].immediate() >> m_param[2].immediate()); else if (m_size == 8) convert_to_mov_immediate((INT64)m_param[1].immediate() >> m_param[2].immediate()); } else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // ROL: convert to NOP if immediate or rotating by 0 case OP_ROL: if (m_param[1].is_immediate() && m_param[2].is_immediate()) { if (m_size == 4) convert_to_mov_immediate(rol32(m_param[1].immediate(), m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate(rol64(m_param[1].immediate(), m_param[2].immediate())); } else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // ROR: convert to NOP if immediate or rotating by 0 case OP_ROR: if (m_param[1].is_immediate() && m_param[2].is_immediate()) { if (m_size == 4) convert_to_mov_immediate(rol32(m_param[1].immediate(), 32 - m_param[2].immediate())); else if (m_size == 8) convert_to_mov_immediate(rol64(m_param[1].immediate(), 64 - m_param[2].immediate())); } else if (m_param[2].is_immediate_value(0)) convert_to_mov_param(1); break; // FMOV: convert to NOP if move-to-self case OP_FMOV: if (m_param[0] == m_param[1]) nop(); break; default: break; } /* if (LOG_SIMPLIFICATIONS && memcmp(&orig, inst, sizeof(orig)) != 0) { std::string disasm1 = orig.disasm(block->drcuml); std::string disasm2 = inst->disasm(block->drcuml); osd_printf_debug("Simplified: %-50.50s -> %s\n", disasm1.c_str(), disasm2.c_str()); } */ // loop until we stop changing opcodes } while (m_opcode != origop); } //------------------------------------------------- // validate - verify that the instruction created // meets all requirements //------------------------------------------------- void uml::instruction::validate() { #ifdef MAME_DEBUG const opcode_info &opinfo = s_opcode_info_table[m_opcode]; assert(opinfo.opcode == m_opcode); // validate raw information assert(m_opcode != OP_INVALID && m_opcode < OP_MAX); assert(m_size == 1 || m_size == 2 || m_size == 4 || m_size == 8); // validate against opcode limits assert((opinfo.sizes & m_size) != 0); assert(m_condition == COND_ALWAYS || opinfo.condition); // validate each parameter for (int pnum = 0; pnum < m_numparams; pnum++) { // ensure the type is valid const parameter ¶m = m_param[pnum]; assert((opinfo.param[pnum].typemask >> param.type()) & 1); } // make sure we aren't missing any parameters if (m_numparams < ARRAY_LENGTH(opinfo.param)) assert(opinfo.param[m_numparams].typemask == 0); #endif } //------------------------------------------------- // input_flags - return the effective input flags // based on any conditions encoded in an // instruction //------------------------------------------------- UINT8 uml::instruction::input_flags() const { static const UINT8 flags_for_condition[] = { FLAG_Z, // COND_Z FLAG_Z, // COND_NZ FLAG_S, // COND_S FLAG_S, // COND_NS FLAG_C, // COND_C FLAG_C, // COND_NC FLAG_V, // COND_V FLAG_V, // COND_NV FLAG_U, // COND_U FLAG_U, // COND_NU FLAG_C | FLAG_Z, // COND_A FLAG_C | FLAG_Z, // COND_BE FLAG_S | FLAG_V | FLAG_Z, // COND_G FLAG_S | FLAG_V | FLAG_Z, // COND_LE FLAG_S | FLAG_V, // COND_L FLAG_S | FLAG_V // COND_GE }; UINT8 flags = s_opcode_info_table[m_opcode].inflags; if (flags & 0x80) flags = m_param[flags - OPFLAGS_P1].immediate() & OPFLAGS_ALL; if (m_condition != COND_ALWAYS) flags |= flags_for_condition[m_condition & 0x0f]; return flags; } //------------------------------------------------- // output_flags - return the effective output // flags based on any conditions encoded in an // instruction //------------------------------------------------- UINT8 uml::instruction::output_flags() const { UINT8 flags = s_opcode_info_table[m_opcode].outflags; if (flags & 0x80) flags = m_param[flags - OPFLAGS_P1].immediate() & OPFLAGS_ALL; return flags; } //------------------------------------------------- // modified_flags - return the effective output // flags based on any conditions encoded in an // instruction //------------------------------------------------- UINT8 uml::instruction::modified_flags() const { return s_opcode_info_table[m_opcode].modflags; } //------------------------------------------------- // disasm - disassemble an instruction to the // given buffer //------------------------------------------------- std::string uml::instruction::disasm(drcuml_state *drcuml) const { static const char *const conditions[] = { "z", "nz", "s", "ns", "c", "nc", "v", "nv", "u", "nu", "a", "be", "g", "le", "l", "ge" }; static const char *const pound_size[] = { "?", "?", "?", "?", "s", "?", "?", "?", "d" }; static const char *const bang_size[] = { "?", "b", "h", "?", "", "?", "?", "?", "d" }; static const char *const fmods[] = { "trunc", "round", "ceil", "floor", "default" }; static const char *const spaces[] = { "program", "data", "io", "3", "4", "5", "6", "7" }; static const char *const sizes[] = { "byte", "word", "dword", "qword" }; const opcode_info &opinfo = s_opcode_info_table[m_opcode]; assert(m_opcode != OP_INVALID && m_opcode < OP_MAX); // start with the raw mnemonic and substitute sizes std::ostringstream buffer; for (const char *opsrc = opinfo.mnemonic; *opsrc != 0; opsrc++) if (*opsrc == '!') util::stream_format(buffer, "%-8s", bang_size[m_size]); else if (*opsrc == '#') util::stream_format(buffer, "%-8s", pound_size[m_size]); else util::stream_format(buffer, "%-8c", *opsrc); // iterate through parameters for (int pnum = 0; pnum < m_numparams; pnum++) { const parameter ¶m = m_param[pnum]; // start with a comma for all except the first parameter if (pnum != 0) buffer.put(','); // ouput based on type switch (param.type()) { // immediates have several special cases case parameter::PTYPE_IMMEDIATE: { // determine the size of the immediate int size; switch (opinfo.param[pnum].size) { case PSIZE_4: size = 4; break; case PSIZE_8: size = 8; break; case PSIZE_P1: size = 1 << m_param[0].size(); break; case PSIZE_P2: size = 1 << m_param[1].size(); break; case PSIZE_P3: size = 1 << m_param[2].size(); break; case PSIZE_P4: size = 1 << m_param[3].size(); break; default: case PSIZE_OP: size = m_size; break; } // truncate to size UINT64 value = param.immediate(); if (size == 1) value = (UINT8)value; if (size == 2) value = (UINT16)value; if (size == 4) value = (UINT32)value; if ((UINT32)value == value) util::stream_format(buffer, "$%X", (UINT32)value); else util::stream_format(buffer, "$%X%08X", (UINT32)(value >> 32), (UINT32)value); } break; // immediates have several special cases case parameter::PTYPE_SIZE: util::stream_format(buffer, "%s", sizes[param.size()]); break; // size + address space immediate case parameter::PTYPE_SIZE_SPACE: util::stream_format(buffer, "%s_%s", spaces[param.space()], sizes[param.size()]); break; // size + scale immediate case parameter::PTYPE_SIZE_SCALE: { int scale = param.scale(); int size = param.size(); if (scale == size) util::stream_format(buffer, "%s", sizes[size]); else util::stream_format(buffer, "%s_x%d", sizes[size], 1 << scale); } break; // fmod immediate case parameter::PTYPE_ROUNDING: util::stream_format(buffer, "%s", fmods[param.rounding()]); break; // integer registers case parameter::PTYPE_INT_REGISTER: util::stream_format(buffer, "i%d", param.ireg() - REG_I0); break; // floating point registers case parameter::PTYPE_FLOAT_REGISTER: util::stream_format(buffer, "f%d", param.freg() - REG_F0); break; // map variables case parameter::PTYPE_MAPVAR: util::stream_format(buffer, "m%d", param.mapvar() - MAPVAR_M0); break; // memory case parameter::PTYPE_MEMORY: { const char *symbol; UINT32 symoffset; // symbol if (drcuml != nullptr && (symbol = drcuml->symbol_find(param.memory(), &symoffset)) != nullptr) { if (symoffset == 0) util::stream_format(buffer, "[%s]", symbol); else util::stream_format(buffer, "[%s+$%X]", symbol, symoffset); } // cache memory else if (drcuml != nullptr && drcuml->cache().contains_pointer(param.memory())) util::stream_format(buffer, "[+$%X]", (UINT32)(FPTR)((drccodeptr)param.memory() - drcuml->cache().near())); // general memory else util::stream_format(buffer, "[[$%p]]", param.memory()); break; } // string pointer case parameter::PTYPE_STRING: util::stream_format(buffer, "%s", (const char *)(FPTR)param.string()); break; // handle pointer case parameter::PTYPE_CODE_HANDLE: util::stream_format(buffer, "%s", param.handle().string()); break; default: util::stream_format(buffer, "???"); break; } } // if there's a condition, append it if (m_condition != COND_ALWAYS) util::stream_format(buffer, ",%s", conditions[m_condition & 0x0f]); // if there are flags, append them if (m_flags != 0) { buffer.put(','); if (m_flags & FLAG_U) buffer.put('U'); if (m_flags & FLAG_S) buffer.put('S'); if (m_flags & FLAG_Z) buffer.put('Z'); if (m_flags & FLAG_V) buffer.put('V'); if (m_flags & FLAG_C) buffer.put('C'); } return buffer.str(); }