/* Copyright (c) 2008-2009, Avian Contributors Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. There is NO WARRANTY for this software. See license.txt for details. */ #if (defined __i386__) || (defined __x86_64__) #include "assembler.h" #include "vector.h" #define CAST1(x) reinterpret_cast(x) #define CAST2(x) reinterpret_cast(x) using namespace vm; namespace { enum { rax = 0, rcx = 1, rdx = 2, rbx = 3, rsp = 4, rbp = 5, rsi = 6, rdi = 7, r8 = 8, r9 = 9, r10 = 10, r11 = 11, r12 = 12, r13 = 13, r14 = 14, r15 = 15, }; const unsigned FrameHeaderSize = 2; inline bool isInt8(intptr_t v) { return v == static_cast(v); } inline bool isInt32(intptr_t v) { return v == static_cast(v); } class Task; class AlignmentPadding; unsigned padding(AlignmentPadding* p, unsigned index, unsigned offset, AlignmentPadding* limit); class MyBlock: public Assembler::Block { public: MyBlock(unsigned offset): next(0), firstPadding(0), lastPadding(0), offset(offset), start(~0), size(0) { } virtual unsigned resolve(unsigned start, Assembler::Block* next) { this->start = start; this->next = static_cast(next); return start + size + padding(firstPadding, start, offset, lastPadding); } MyBlock* next; AlignmentPadding* firstPadding; AlignmentPadding* lastPadding; unsigned offset; unsigned start; unsigned size; }; class Context { public: Context(System* s, Allocator* a, Zone* zone): s(s), zone(zone), client(0), code(s, a, 1024), tasks(0), result(0), firstBlock(new (zone->allocate(sizeof(MyBlock))) MyBlock(0)), lastBlock(firstBlock) { } System* s; Zone* zone; Assembler::Client* client; Vector code; Task* tasks; uint8_t* result; MyBlock* firstBlock; MyBlock* lastBlock; }; typedef void (*OperationType)(Context*); typedef void (*UnaryOperationType)(Context*, unsigned, Assembler::Operand*); typedef void (*BinaryOperationType) (Context*, unsigned, Assembler::Operand*, unsigned, Assembler::Operand*); class ArchitectureContext { public: ArchitectureContext(System* s): s(s) { } System* s; OperationType operations[OperationCount]; UnaryOperationType unaryOperations[UnaryOperationCount * OperandTypeCount]; BinaryOperationType binaryOperations [(BinaryOperationCount + TernaryOperationCount) * OperandTypeCount * OperandTypeCount]; }; inline void NO_RETURN abort(Context* c) { abort(c->s); } inline void NO_RETURN abort(ArchitectureContext* c) { abort(c->s); } #ifndef NDEBUG inline void assert(Context* c, bool v) { assert(c->s, v); } inline void assert(ArchitectureContext* c, bool v) { assert(c->s, v); } #endif // not NDEBUG inline void expect(Context* c, bool v) { expect(c->s, v); } ResolvedPromise* resolved(Context* c, int64_t value) { return new (c->zone->allocate(sizeof(ResolvedPromise))) ResolvedPromise(value); } class CodePromise: public Promise { public: CodePromise(Context* c, unsigned offset): c(c), offset(offset) { } virtual int64_t value() { if (resolved()) { return reinterpret_cast(c->result + offset); } abort(c); } virtual bool resolved() { return c->result != 0; } Context* c; unsigned offset; }; CodePromise* codePromise(Context* c, unsigned offset) { return new (c->zone->allocate(sizeof(CodePromise))) CodePromise(c, offset); } class Offset: public Promise { public: Offset(Context* c, MyBlock* block, unsigned offset, AlignmentPadding* limit): c(c), block(block), offset(offset), limit(limit) { } virtual bool resolved() { return block->start != static_cast(~0); } virtual int64_t value() { assert(c, resolved()); return block->start + (offset - block->offset) + padding(block->firstPadding, block->start, block->offset, limit); } Context* c; MyBlock* block; unsigned offset; AlignmentPadding* limit; }; Promise* offset(Context* c) { return new (c->zone->allocate(sizeof(Offset))) Offset(c, c->lastBlock, c->code.length(), c->lastBlock->lastPadding); } class Task { public: Task(Task* next): next(next) { } virtual void run(Context* c) = 0; Task* next; }; void* resolveOffset(System* s, uint8_t* instruction, unsigned instructionSize, int64_t value) { intptr_t v = reinterpret_cast(value) - instruction - instructionSize; expect(s, isInt32(v)); int32_t v4 = v; memcpy(instruction + instructionSize - 4, &v4, 4); return instruction + instructionSize; } class OffsetListener: public Promise::Listener { public: OffsetListener(System* s, uint8_t* instruction, unsigned instructionSize): s(s), instruction(instruction), instructionSize(instructionSize) { } virtual bool resolve(int64_t value, void** location) { void* p = resolveOffset(s, instruction, instructionSize, value); if (location) *location = p; return false; } System* s; uint8_t* instruction; unsigned instructionSize; }; class OffsetTask: public Task { public: OffsetTask(Task* next, Promise* promise, Promise* instructionOffset, unsigned instructionSize): Task(next), promise(promise), instructionOffset(instructionOffset), instructionSize(instructionSize) { } virtual void run(Context* c) { if (promise->resolved()) { resolveOffset (c->s, c->result + instructionOffset->value(), instructionSize, promise->value()); } else { new (promise->listen(sizeof(OffsetListener))) OffsetListener(c->s, c->result + instructionOffset->value(), instructionSize); } } Promise* promise; Promise* instructionOffset; unsigned instructionSize; }; void appendOffsetTask(Context* c, Promise* promise, Promise* instructionOffset, unsigned instructionSize) { c->tasks = new (c->zone->allocate(sizeof(OffsetTask))) OffsetTask (c->tasks, promise, instructionOffset, instructionSize); } void copy(System* s, void* dst, int64_t src, unsigned size) { switch (size) { case 4: { int32_t v = src; memcpy(dst, &v, 4); } break; case 8: { int64_t v = src; memcpy(dst, &v, 8); } break; default: abort(s); } } class ImmediateListener: public Promise::Listener { public: ImmediateListener(System* s, void* dst, unsigned size, unsigned offset): s(s), dst(dst), size(size), offset(offset) { } virtual bool resolve(int64_t value, void** location) { copy(s, dst, value, size); if (location) *location = static_cast(dst) + offset; return offset == 0; } System* s; void* dst; unsigned size; unsigned offset; }; class ImmediateTask: public Task { public: ImmediateTask(Task* next, Promise* promise, Promise* offset, unsigned size, unsigned promiseOffset): Task(next), promise(promise), offset(offset), size(size), promiseOffset(promiseOffset) { } virtual void run(Context* c) { if (promise->resolved()) { copy(c->s, c->result + offset->value(), promise->value(), size); } else { new (promise->listen(sizeof(ImmediateListener))) ImmediateListener (c->s, c->result + offset->value(), size, promiseOffset); } } Promise* promise; Promise* offset; unsigned size; unsigned promiseOffset; }; void appendImmediateTask(Context* c, Promise* promise, Promise* offset, unsigned size, unsigned promiseOffset = 0) { c->tasks = new (c->zone->allocate(sizeof(ImmediateTask))) ImmediateTask (c->tasks, promise, offset, size, promiseOffset); } class AlignmentPadding { public: AlignmentPadding(Context* c): offset(c->code.length()), next(0) { if (c->lastBlock->firstPadding) { c->lastBlock->lastPadding->next = this; } else { c->lastBlock->firstPadding = this; } c->lastBlock->lastPadding = this; } unsigned offset; AlignmentPadding* next; }; unsigned padding(AlignmentPadding* p, unsigned start, unsigned offset, AlignmentPadding* limit) { unsigned padding = 0; if (limit) { unsigned index = 0; for (; p; p = p->next) { index = p->offset - offset; while ((start + index + padding + 1) % 4) { ++ padding; } if (p == limit) break; } } return padding; } #define REX_W 0x48 #define REX_R 0x44 #define REX_X 0x42 #define REX_B 0x41 #define REX_NONE 0x40 void maybeRex(Context* c, unsigned size, int a, int index, int base, bool always) { if(BytesPerWord == 8) { uint8_t byte; if(size == 8) { byte = REX_W; } else { byte = REX_NONE; } if(a != NoRegister && (a & 8)) byte |= REX_R; if(index != NoRegister && (index & 8)) byte |= REX_X; if(base != NoRegister && (base & 8)) byte |= REX_B; if(always or byte != REX_NONE) c->code.append(byte); } } inline void maybeRex(Context* c, unsigned size, Assembler::Register* a, Assembler::Register* b) { maybeRex(c, size, a->low, NoRegister, b->low, false); } inline void alwaysRex(Context* c, unsigned size, Assembler::Register* a, Assembler::Register* b) { maybeRex(c, size, a->low, NoRegister, b->low, true); } inline void maybeRex(Context* c, unsigned size, Assembler::Register* a) { maybeRex(c, size, NoRegister, NoRegister, a->low, false); } inline void maybeRex(Context* c, unsigned size, Assembler::Register* a, Assembler::Memory* b) { maybeRex(c, size, a->low, b->index, b->base, false); } inline void maybeRex(Context* c, unsigned size, Assembler::Memory* a) { maybeRex(c, size, NoRegister, a->index, a->base, false); } inline int regCode(int a) { return a & 7; } inline int regCode(Assembler::Register* a) { return regCode(a->low); } inline void modrm(Context* c, uint8_t mod, int a, int b) { c->code.append(mod | (regCode(b) << 3) | regCode(a)); } inline void modrm(Context* c, uint8_t mod, Assembler::Register* a, Assembler::Register* b) { modrm(c, mod, a->low, b->low); } inline void sib(Context* c, unsigned scale, int index, int base) { c->code.append((log(scale) << 6) | (regCode(index) << 3) | regCode(base)); } inline void modrmSib(Context* c, int width, int a, int scale, int index, int base) { if(index == NoRegister) { modrm(c, width, base, a); if(regCode(base) == rsp) { sib(c, 0x00, rsp, rsp); } } else { modrm(c, width, rsp, a); sib(c, scale, index, base); } } inline void modrmSibImm(Context* c, int a, int scale, int index, int base, long long offset) { if(offset == 0 && regCode(base) != rbp) { modrmSib(c, 0x00, a, scale, index, base); } else if(isInt8(offset)) { modrmSib(c, 0x40, a, scale, index, base); c->code.append(offset); } else { modrmSib(c, 0x80, a, scale, index, base); c->code.append4(offset); } } inline void modrmSibImm(Context* c, Assembler::Register* a, Assembler::Memory* b) { modrmSibImm(c, a->low, b->scale, b->index, b->base, b->offset); } inline void opcode(Context* c, uint8_t op) { c->code.append(op); } inline void opcode(Context* c, uint8_t op1, uint8_t op2) { c->code.append(op1); c->code.append(op2); } void return_(Context* c) { opcode(c, 0xc3); } void ignore(Context*) { } void unconditional(Context* c, unsigned jump, Assembler::Constant* a) { appendOffsetTask(c, a->value, offset(c), 5); opcode(c, jump); c->code.append4(0); } void conditional(Context* c, unsigned condition, Assembler::Constant* a) { appendOffsetTask(c, a->value, offset(c), 6); opcode(c, 0x0f, condition); c->code.append4(0); } inline unsigned index(UnaryOperation operation, OperandType operand) { return operation + (UnaryOperationCount * operand); } inline unsigned index(BinaryOperation operation, OperandType operand1, OperandType operand2) { return operation + ((BinaryOperationCount + TernaryOperationCount) * operand1) + ((BinaryOperationCount + TernaryOperationCount) * OperandTypeCount * operand2); } inline unsigned index(TernaryOperation operation, OperandType operand1, OperandType operand2) { return BinaryOperationCount + operation + ((BinaryOperationCount + TernaryOperationCount) * operand1) + ((BinaryOperationCount + TernaryOperationCount) * OperandTypeCount * operand2); } void moveCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b); void moveCR2(Context*, unsigned, Assembler::Constant*, unsigned, Assembler::Register*, unsigned); void callR(Context*, unsigned, Assembler::Register*); void callC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); unconditional(c, 0xe8, a); } void longCallC(Context* c, unsigned size, Assembler::Constant* a) { assert(c, size == BytesPerWord); if (BytesPerWord == 8) { Assembler::Register r(r10); moveCR2(c, size, a, size, &r, 11); callR(c, size, &r); } else { callC(c, size, a); } } void jumpR(Context* c, unsigned size UNUSED, Assembler::Register* a) { assert(c, size == BytesPerWord); maybeRex(c, 4, a); opcode(c, 0xff, 0xe0 + regCode(a)); } void jumpC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); unconditional(c, 0xe9, a); } void jumpM(Context* c, unsigned size UNUSED, Assembler::Memory* a) { assert(c, size == BytesPerWord); maybeRex(c, 4, a); opcode(c, 0xff); modrmSibImm(c, rsp, a->scale, a->index, a->base, a->offset); } void jumpIfEqualC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x84, a); } void jumpIfNotEqualC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x85, a); } void jumpIfGreaterC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x8f, a); } void jumpIfGreaterOrEqualC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x8d, a); } void jumpIfLessC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x8c, a); } void jumpIfLessOrEqualC(Context* c, unsigned size UNUSED, Assembler::Constant* a) { assert(c, size == BytesPerWord); conditional(c, 0x8e, a); } void longJumpC(Context* c, unsigned size, Assembler::Constant* a) { assert(c, size == BytesPerWord); if (BytesPerWord == 8) { Assembler::Register r(r10); moveCR2(c, size, a, size, &r, 11); jumpR(c, size, &r); } else { jumpC(c, size, a); } } void callR(Context* c, unsigned size UNUSED, Assembler::Register* a) { assert(c, size == BytesPerWord); //maybeRex.W has no meaning here so we disable it maybeRex(c, 4, a); opcode(c, 0xff, 0xd0 + regCode(a)); } void callM(Context* c, unsigned size UNUSED, Assembler::Memory* a) { assert(c, size == BytesPerWord); maybeRex(c, 4, a); opcode(c, 0xff); modrmSibImm(c, rdx, a->scale, a->index, a->base, a->offset); } void alignedCallC(Context* c, unsigned size, Assembler::Constant* a) { new (c->zone->allocate(sizeof(AlignmentPadding))) AlignmentPadding(c); callC(c, size, a); } void pushR(Context* c, UNUSED unsigned size, Assembler::Register* a) { if (BytesPerWord == 4 and size == 8) { Assembler::Register ah(a->high); pushR(c, 4, &ah); pushR(c, 4, a); } else { maybeRex(c, 4, a); opcode(c, 0x50 + regCode(a)); } } void moveRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize, Assembler::Register* b); void popR(Context* c, unsigned size, Assembler::Register* a) { if (BytesPerWord == 4 and size == 8) { Assembler::Register ah(a->high); popR(c, 4, a); popR(c, 4, &ah); } else { maybeRex(c, 4, a); opcode(c, 0x58 + regCode(a)); if (BytesPerWord == 8 and size == 4) { moveRR(c, 4, a, 8, a); } } } void addCarryCR(Context* c, unsigned size, Assembler::Constant* a, Assembler::Register* b); void negateR(Context* c, unsigned size, Assembler::Register* a) { if (BytesPerWord == 4 and size == 8) { assert(c, a->low == rax and a->high == rdx); ResolvedPromise zeroPromise(0); Assembler::Constant zero(&zeroPromise); Assembler::Register ah(a->high); negateR(c, 4, a); addCarryCR(c, 4, &zero, &ah); negateR(c, 4, &ah); } else { maybeRex(c, size, a); opcode(c, 0xf7, 0xd8 + regCode(a)); } } void negateRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b UNUSED) { assert(c, aSize == bSize); negateR(c, aSize, a); } void moveCR2(Context* c, UNUSED unsigned aSize, Assembler::Constant* a, UNUSED unsigned bSize, Assembler::Register* b, unsigned promiseOffset) { if (BytesPerWord == 4 and bSize == 8) { int64_t v = a->value->value(); ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); moveCR(c, 4, &al, 4, b); moveCR(c, 4, &ah, 4, &bh); } else { maybeRex(c, BytesPerWord, b); opcode(c, 0xb8 + regCode(b)); if (a->value->resolved()) { c->code.appendAddress(a->value->value()); } else { appendImmediateTask (c, a->value, offset(c), BytesPerWord, promiseOffset); c->code.appendAddress(static_cast(0)); } } } void moveCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { moveCR2(c, aSize, a, bSize, b, 0); } void swapRR(Context* c, unsigned aSize UNUSED, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); assert(c, aSize == BytesPerWord); alwaysRex(c, aSize, a, b); opcode(c, 0x87); modrm(c, 0xc0, b, a); } void moveRR(Context* c, unsigned aSize, Assembler::Register* a, UNUSED unsigned bSize, Assembler::Register* b) { if (BytesPerWord == 4 and aSize == 8 and bSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); if (a->high == b->low) { if (a->low == b->high) { swapRR(c, 4, a, 4, b); } else { moveRR(c, 4, &ah, 4, &bh); moveRR(c, 4, a, 4, b); } } else { moveRR(c, 4, a, 4, b); moveRR(c, 4, &ah, 4, &bh); } } else { switch (aSize) { case 1: if (BytesPerWord == 4 and a->low > rbx) { assert(c, b->low <= rbx); moveRR(c, BytesPerWord, a, BytesPerWord, b); moveRR(c, 1, b, BytesPerWord, b); } else { alwaysRex(c, aSize, b, a); opcode(c, 0x0f, 0xbe); modrm(c, 0xc0, a, b); } break; case 2: alwaysRex(c, aSize, b, a); opcode(c, 0x0f, 0xbf); modrm(c, 0xc0, a, b); break; case 4: if (bSize == 8) { if (BytesPerWord == 8) { alwaysRex(c, aSize, b, a); opcode(c, 0x63); modrm(c, 0xc0, a, b); } else { if (a->low == rax and b->low == rax and b->high == rdx) { opcode(c, 0x99); //cdq } else { assert(c, b->low == rax and b->high == rdx); moveRR(c, 4, a, 4, b); moveRR(c, 4, b, 8, b); } } } else { if (a->low != b->low) { alwaysRex(c, aSize, a, b); opcode(c, 0x89); modrm(c, 0xc0, b, a); } } break; case 8: if (a->low != b->low){ maybeRex(c, aSize, a, b); opcode(c, 0x89); modrm(c, 0xc0, b, a); } break; } } } void moveMR(Context* c, unsigned aSize, Assembler::Memory* a, unsigned bSize, Assembler::Register* b) { switch (aSize) { case 1: maybeRex(c, bSize, b, a); opcode(c, 0x0f, 0xbe); modrmSibImm(c, b, a); break; case 2: maybeRex(c, bSize, b, a); opcode(c, 0x0f, 0xbf); modrmSibImm(c, b, a); break; case 4: if (BytesPerWord == 8) { maybeRex(c, bSize, b, a); opcode(c, 0x63); modrmSibImm(c, b, a); } else { if (bSize == 8) { assert(c, b->low == rax and b->high == rdx); moveMR(c, 4, a, 4, b); moveRR(c, 4, b, 8, b); } else { maybeRex(c, bSize, b, a); opcode(c, 0x8b); modrmSibImm(c, b, a); } } break; case 8: if (BytesPerWord == 4 and bSize == 8) { Assembler::Memory ah(a->base, a->offset + 4, a->index, a->scale); Assembler::Register bh(b->high); moveMR(c, 4, a, 4, b); moveMR(c, 4, &ah, 4, &bh); } else { maybeRex(c, bSize, b, a); opcode(c, 0x8b); modrmSibImm(c, b, a); } break; default: abort(c); } } void moveRM(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Memory* b) { assert(c, aSize == bSize); switch (aSize) { case 1: maybeRex(c, bSize, a, b); opcode(c, 0x88); modrmSibImm(c, a, b); break; case 2: opcode(c, 0x66); maybeRex(c, bSize, a, b); opcode(c, 0x89); modrmSibImm(c, a, b); break; case 4: if (BytesPerWord == 8) { maybeRex(c, bSize, a, b); opcode(c, 0x89); modrmSibImm(c, a, b); break; } else { opcode(c, 0x89); modrmSibImm(c, a, b); } break; case 8: if(BytesPerWord == 8) { maybeRex(c, bSize, a, b); opcode(c, 0x89); modrmSibImm(c, a, b); } else { Assembler::Register ah(a->high); Assembler::Memory bh(b->base, b->offset + 4, b->index, b->scale); moveRM(c, 4, a, 4, b); moveRM(c, 4, &ah, 4, &bh); } break; default: abort(c); } } void moveAR(Context* c, unsigned aSize, Assembler::Address* a, unsigned bSize, Assembler::Register* b) { assert(c, BytesPerWord == 8 or (aSize == 4 and bSize == 4)); Assembler::Constant constant(a->address); Assembler::Memory memory(b->low, 0, -1, 0); moveCR(c, aSize, &constant, bSize, b); moveMR(c, bSize, &memory, bSize, b); } ShiftMaskPromise* shiftMaskPromise(Context* c, Promise* base, unsigned shift, int64_t mask) { return new (c->zone->allocate(sizeof(ShiftMaskPromise))) ShiftMaskPromise(base, shift, mask); } void moveCM(Context* c, unsigned aSize UNUSED, Assembler::Constant* a, unsigned bSize, Assembler::Memory* b) { switch (bSize) { case 1: maybeRex(c, bSize, b); opcode(c, 0xc6); modrmSibImm(c, 0, b->scale, b->index, b->base, b->offset); c->code.append(a->value->value()); break; case 2: opcode(c, 0x66); maybeRex(c, bSize, b); opcode(c, 0xc7); modrmSibImm(c, 0, b->scale, b->index, b->base, b->offset); c->code.append2(a->value->value()); break; case 4: maybeRex(c, bSize, b); opcode(c, 0xc7); modrmSibImm(c, 0, b->scale, b->index, b->base, b->offset); if (a->value->resolved()) { c->code.append4(a->value->value()); } else { appendImmediateTask(c, a->value, offset(c), 4); c->code.append4(0); } break; case 8: { if (BytesPerWord == 8) { if(a->value->resolved() and isInt32(a->value->value())) { maybeRex(c, bSize, b); opcode(c, 0xc7); modrmSibImm(c, 0, b->scale, b->index, b->base, b->offset); c->code.append4(a->value->value()); } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, 8, a, 8, &tmp); moveRM(c, 8, &tmp, 8, b); c->client->releaseTemporary(tmp.low); } } else { Assembler::Constant ah(shiftMaskPromise(c, a->value, 32, 0xFFFFFFFF)); Assembler::Constant al(shiftMaskPromise(c, a->value, 0, 0xFFFFFFFF)); Assembler::Memory bh(b->base, b->offset + 4, b->index, b->scale); moveCM(c, 4, &al, 4, b); moveCM(c, 4, &ah, 4, &bh); } } break; default: abort(c); } } void moveZRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { switch (aSize) { case 2: alwaysRex(c, aSize, b, a); opcode(c, 0x0f, 0xb7); modrm(c, 0xc0, a, b); break; default: abort(c); } } void moveZMR(Context* c, unsigned aSize UNUSED, Assembler::Memory* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, bSize == BytesPerWord); assert(c, aSize == 2); maybeRex(c, bSize, b, a); opcode(c, 0x0f, 0xb7); modrmSibImm(c, b->low, a->scale, a->index, a->base, a->offset); } void addCarryRR(Context* c, unsigned size, Assembler::Register* a, Assembler::Register* b) { assert(c, BytesPerWord == 8 or size == 4); maybeRex(c, size, a, b); opcode(c, 0x11); modrm(c, 0xc0, b, a); } void addRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); addRR(c, 4, a, 4, b); addCarryRR(c, 4, &ah, &bh); } else { maybeRex(c, aSize, a, b); opcode(c, 0x01); modrm(c, 0xc0, b, a); } } void addCarryCR(Context* c, unsigned size UNUSED, Assembler::Constant* a, Assembler::Register* b) { int64_t v = a->value->value(); if (isInt8(v)) { maybeRex(c, size, b); opcode(c, 0x83, 0xd0 + regCode(b)); c->code.append(v); } else { abort(c); } } void addCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); int64_t v = a->value->value(); if (v) { if (BytesPerWord == 4 and bSize == 8) { ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); addCR(c, 4, &al, 4, b); addCarryCR(c, 4, &ah, &bh); } else { if (isInt32(v)) { maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xc0 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xc0 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); addRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } } void subtractBorrowCR(Context* c, unsigned size UNUSED, Assembler::Constant* a, Assembler::Register* b) { assert(c, BytesPerWord == 8 or size == 4); int64_t v = a->value->value(); if (isInt8(v)) { opcode(c, 0x83, 0xd8 + regCode(b)); c->code.append(v); } else { abort(c); } } void subtractRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize, Assembler::Register* b); void subtractCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); int64_t v = a->value->value(); if (v) { if (BytesPerWord == 4 and bSize == 8) { ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); subtractCR(c, 4, &al, 4, b); subtractBorrowCR(c, 4, &ah, &bh); } else { if (isInt32(v)) { maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xe8 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xe8 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); subtractRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } } void subtractBorrowRR(Context* c, unsigned size, Assembler::Register* a, Assembler::Register* b) { assert(c, BytesPerWord == 8 or size == 4); maybeRex(c, size, a, b); opcode(c, 0x19); modrm(c, 0xc0, b, a); } void subtractRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); subtractRR(c, 4, a, 4, b); subtractBorrowRR(c, 4, &ah, &bh); } else { maybeRex(c, aSize, a, b); opcode(c, 0x29); modrm(c, 0xc0, b, a); } } void andRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); andRR(c, 4, a, 4, b); andRR(c, 4, &ah, 4, &bh); } else { maybeRex(c, aSize, a, b); opcode(c, 0x21); modrm(c, 0xc0, b, a); } } void andCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); int64_t v = a->value->value(); if (BytesPerWord == 4 and bSize == 8) { ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); andCR(c, 4, &al, 4, b); andCR(c, 4, &ah, 4, &bh); } else { if (isInt32(v)) { maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xe0 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xe0 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); andRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } void orRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); orRR(c, 4, a, 4, b); orRR(c, 4, &ah, 4, &bh); } else { maybeRex(c, aSize, a, b); opcode(c, 0x09); modrm(c, 0xc0, b, a); } } void orCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); int64_t v = a->value->value(); if (v) { if (BytesPerWord == 4 and bSize == 8) { ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); orCR(c, 4, &al, 4, b); orCR(c, 4, &ah, 4, &bh); } else { if (isInt32(v)) { maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xc8 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xc8 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); orRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } } void xorRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { if (BytesPerWord == 4 and aSize == 8) { Assembler::Register ah(a->high); Assembler::Register bh(b->high); xorRR(c, 4, a, 4, b); xorRR(c, 4, &ah, 4, &bh); } else { maybeRex(c, aSize, a, b); opcode(c, 0x31); modrm(c, 0xc0, b, a); } } void xorCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); int64_t v = a->value->value(); if (v) { if (BytesPerWord == 4 and bSize == 8) { ResolvedPromise high((v >> 32) & 0xFFFFFFFF); Assembler::Constant ah(&high); ResolvedPromise low(v & 0xFFFFFFFF); Assembler::Constant al(&low); Assembler::Register bh(b->high); xorCR(c, 4, &al, 4, b); xorCR(c, 4, &ah, 4, &bh); } else { if (isInt32(v)) { maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xf0 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xf0 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); xorRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } } void multiplyRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { assert(c, b->high == rdx); assert(c, b->low != rax); assert(c, a->low != rax); assert(c, a->high != rax); c->client->save(rax); Assembler::Register axdx(rax, rdx); Assembler::Register ah(a->high); Assembler::Register bh(b->high); moveRR(c, 4, b, 4, &axdx); multiplyRR(c, 4, &ah, 4, b); multiplyRR(c, 4, a, 4, &bh); addRR(c, 4, &bh, 4, b); // mul a->low,%eax%edx opcode(c, 0xf7, 0xe0 + a->low); addRR(c, 4, b, 4, &bh); moveRR(c, 4, &axdx, 4, b); } else { maybeRex(c, aSize, b, a); opcode(c, 0x0f, 0xaf); modrm(c, 0xc0, a, b); } } void compareRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); maybeRex(c, aSize, a, b); opcode(c, 0x39); modrm(c, 0xc0, b, a); } void compareCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); assert(c, BytesPerWord == 8 or aSize == 4); if (a->value->resolved() and isInt32(a->value->value())) { int64_t v = a->value->value(); maybeRex(c, aSize, b); if (isInt8(v)) { opcode(c, 0x83, 0xf8 + regCode(b)); c->code.append(v); } else { opcode(c, 0x81, 0xf8 + regCode(b)); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); compareRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } void multiplyCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { assert(c, aSize == bSize); if (BytesPerWord == 4 and aSize == 8) { const uint32_t mask = ~((1 << rax) | (1 << rdx)); Assembler::Register tmp(c->client->acquireTemporary(mask), c->client->acquireTemporary(mask)); moveCR(c, aSize, a, aSize, &tmp); multiplyRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); c->client->releaseTemporary(tmp.high); } else { int64_t v = a->value->value(); if (v != 1) { if (isInt32(v)) { maybeRex(c, bSize, b, b); if (isInt8(v)) { opcode(c, 0x6b); modrm(c, 0xc0, b, b); c->code.append(v); } else { opcode(c, 0x69); modrm(c, 0xc0, b, b); c->code.append4(v); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, aSize, &tmp); multiplyRR(c, aSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } } } void compareRM(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Memory* b) { assert(c, aSize == bSize); assert(c, BytesPerWord == 8 or aSize == 4); if (BytesPerWord == 8 and aSize == 4) { moveRR(c, 4, a, 8, a); } maybeRex(c, bSize, a, b); opcode(c, 0x39); modrmSibImm(c, a, b); } void compareCM(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Memory* b) { assert(c, aSize == bSize); assert(c, BytesPerWord == 8 or aSize == 4); if (a->value->resolved()) { int64_t v = a->value->value(); maybeRex(c, aSize, b); opcode(c, isInt8(v) ? 0x83 : 0x81); modrmSibImm(c, rdi, b->scale, b->index, b->base, b->offset); if (isInt8(v)) { c->code.append(v); } else if (isInt32(v)) { c->code.append4(v); } else { abort(c); } } else { Assembler::Register tmp(c->client->acquireTemporary()); moveCR(c, aSize, a, bSize, &tmp); compareRM(c, bSize, &tmp, bSize, b); c->client->releaseTemporary(tmp.low); } } void longCompare(Context* c, Assembler::Operand* al, UNUSED Assembler::Operand* ah, Assembler::Register* bl, UNUSED Assembler::Operand* bh, BinaryOperationType compare) { ResolvedPromise negativePromise(-1); Assembler::Constant negative(&negativePromise); ResolvedPromise zeroPromise(0); Assembler::Constant zero(&zeroPromise); ResolvedPromise positivePromise(1); Assembler::Constant positive(&positivePromise); if (BytesPerWord == 8) { compare(c, 8, al, 8, bl); opcode(c, 0x0f, 0x8c); // jl unsigned less = c->code.length(); c->code.append4(0); opcode(c, 0x0f, 0x8f); // jg unsigned greater = c->code.length(); c->code.append4(0); moveCR(c, 4, &zero, 4, bl); opcode(c, 0xe9); // jmp unsigned nextFirst = c->code.length(); c->code.append4(0); int32_t lessOffset = c->code.length() - less - 4; c->code.set(less, &lessOffset, 4); moveCR(c, 4, &negative, 4, bl); opcode(c, 0xe9); // jmp unsigned nextSecond = c->code.length(); c->code.append4(0); int32_t greaterOffset = c->code.length() - greater - 4; c->code.set(greater, &greaterOffset, 4); moveCR(c, 4, &positive, 4, bl); int32_t nextFirstOffset = c->code.length() - nextFirst - 4; c->code.set(nextFirst, &nextFirstOffset, 4); int32_t nextSecondOffset = c->code.length() - nextSecond - 4; c->code.set(nextSecond, &nextSecondOffset, 4); } else { compare(c, 4, ah, 4, bh); opcode(c, 0x0f, 0x8c); //jl unsigned less = c->code.length(); c->code.append4(0); opcode(c, 0x0f, 0x8f); //jg unsigned greater = c->code.length(); c->code.append4(0); compare(c, 4, al, 4, bl); opcode(c, 0x0f, 0x82); //ja unsigned above = c->code.length(); c->code.append4(0); opcode(c, 0x0f, 0x87); //jb unsigned below = c->code.length(); c->code.append4(0); moveCR(c, 4, &zero, 4, bl); c->code.append(0xe9); // jmp unsigned nextFirst = c->code.length(); c->code.append4(0); int32_t lessOffset = c->code.length() - less - 4; c->code.set(less, &lessOffset, 4); int32_t aboveOffset = c->code.length() - above - 4; c->code.set(above, &aboveOffset, 4); moveCR(c, 4, &negative, 4, bl); opcode(c, 0xe9); // jmp unsigned nextSecond = c->code.length(); c->code.append4(0); int32_t greaterOffset = c->code.length() - greater - 4; c->code.set(greater, &greaterOffset, 4); int32_t belowOffset = c->code.length() - below - 4; c->code.set(below, &belowOffset, 4); moveCR(c, 4, &positive, 4, bl); int32_t nextFirstOffset = c->code.length() - nextFirst - 4; c->code.set(nextFirst, &nextFirstOffset, 4); int32_t nextSecondOffset = c->code.length() - nextSecond - 4; c->code.set(nextSecond, &nextSecondOffset, 4); } } void divideRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b UNUSED) { assert(c, aSize == bSize); assert(c, b->low == rax); assert(c, a->low != rdx); c->client->save(rdx); maybeRex(c, aSize, a, b); opcode(c, 0x99); // cdq maybeRex(c, aSize, b, a); opcode(c, 0xf7, 0xf8 + regCode(a)); } void remainderRR(Context* c, unsigned aSize, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == bSize); assert(c, b->low == rax); assert(c, a->low != rdx); c->client->save(rdx); maybeRex(c, aSize, a, b); opcode(c, 0x99); // cdq maybeRex(c, aSize, b, a); opcode(c, 0xf7, 0xf8 + regCode(a)); Assembler::Register dx(rdx); moveRR(c, BytesPerWord, &dx, BytesPerWord, b); } void longCompareCR(Context* c, unsigned aSize UNUSED, Assembler::Constant* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == 8); assert(c, bSize == 8); int64_t v = a->value->value(); ResolvedPromise low(v & ~static_cast(0)); Assembler::Constant al(&low); ResolvedPromise high((v >> 32) & ~static_cast(0)); Assembler::Constant ah(&high); Assembler::Register bh(b->high); longCompare(c, &al, &ah, b, &bh, CAST2(compareCR)); } void longCompareRR(Context* c, unsigned aSize UNUSED, Assembler::Register* a, unsigned bSize UNUSED, Assembler::Register* b) { assert(c, aSize == 8); assert(c, bSize == 8); Assembler::Register ah(a->high); Assembler::Register bh(b->high); longCompare(c, a, &ah, b, &bh, CAST2(compareRR)); } void doShift(Context* c, UNUSED void (*shift) (Context*, unsigned, Assembler::Register*, unsigned, Assembler::Register*), int type, UNUSED unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { int64_t v = a->value->value(); if (BytesPerWord == 4 and bSize == 8) { c->client->save(rcx); Assembler::Register cx(rcx); moveCR(c, 4, a, 4, &cx); shift(c, aSize, &cx, bSize, b); } else { maybeRex(c, bSize, b); if (v == 1) { opcode(c, 0xd1, type + regCode(b)); } else if (isInt8(v)) { opcode(c, 0xc1, type + regCode(b)); c->code.append(v); } else { abort(c); } } } void shiftLeftRR(Context* c, UNUSED unsigned aSize, Assembler::Register* a, unsigned bSize, Assembler::Register* b) { assert(c, a->low == rcx); if (BytesPerWord == 4 and bSize == 8) { // shld opcode(c, 0x0f, 0xa5); modrm(c, 0xc0, b->high, b->low); // shl opcode(c, 0xd3, 0xe0 + b->low); ResolvedPromise promise(32); Assembler::Constant constant(&promise); compareCR(c, aSize, &constant, aSize, a); opcode(c, 0x0f, 0x8c); //jl c->code.append4(2 + 2); Assembler::Register bh(b->high); moveRR(c, 4, b, 4, &bh); // 2 bytes xorRR(c, 4, b, 4, b); // 2 bytes } else { maybeRex(c, bSize, a, b); opcode(c, 0xd3, 0xe0 + regCode(b)); } } void shiftLeftCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { doShift(c, shiftLeftRR, 0xe0, aSize, a, bSize, b); } void shiftRightRR(Context* c, UNUSED unsigned aSize, Assembler::Register* a, unsigned bSize, Assembler::Register* b) { assert(c, a->low == rcx); if (BytesPerWord == 4 and bSize == 8) { // shrd opcode(c, 0x0f, 0xad); modrm(c, 0xc0, b->low, b->high); // sar opcode(c, 0xd3, 0xf8 + b->high); ResolvedPromise promise(32); Assembler::Constant constant(&promise); compareCR(c, aSize, &constant, aSize, a); opcode(c, 0x0f, 0x8c); //jl c->code.append4(2 + 3); Assembler::Register bh(b->high); moveRR(c, 4, &bh, 4, b); // 2 bytes // sar 31,high opcode(c, 0xc1, 0xf8 + b->high); c->code.append(31); } else { maybeRex(c, bSize, a, b); opcode(c, 0xd3, 0xf8 + regCode(b)); } } void shiftRightCR(Context* c, unsigned aSize, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { doShift(c, shiftRightRR, 0xf8, aSize, a, bSize, b); } void unsignedShiftRightRR(Context* c, UNUSED unsigned aSize, Assembler::Register* a, unsigned bSize, Assembler::Register* b) { assert(c, a->low == rcx); if (BytesPerWord == 4 and bSize == 8) { // shrd opcode(c, 0x0f, 0xad); modrm(c, 0xc0, b->low, b->high); // shr opcode(c, 0xd3, 0xe8 + b->high); ResolvedPromise promise(32); Assembler::Constant constant(&promise); compareCR(c, aSize, &constant, aSize, a); opcode(c, 0x0f, 0x8c); //jl c->code.append4(2 + 2); Assembler::Register bh(b->high); moveRR(c, 4, &bh, 4, b); // 2 bytes xorRR(c, 4, &bh, 4, &bh); // 2 bytes } else { maybeRex(c, bSize, a, b); opcode(c, 0xd3, 0xe8 + regCode(b)); } } void unsignedShiftRightCR(Context* c, unsigned aSize UNUSED, Assembler::Constant* a, unsigned bSize, Assembler::Register* b) { doShift(c, unsignedShiftRightRR, 0xe8, aSize, a, bSize, b); } void populateTables(ArchitectureContext* c) { const OperandType C = ConstantOperand; const OperandType A = AddressOperand; const OperandType R = RegisterOperand; const OperandType M = MemoryOperand; OperationType* zo = c->operations; UnaryOperationType* uo = c->unaryOperations; BinaryOperationType* bo = c->binaryOperations; zo[Return] = return_; zo[LoadBarrier] = ignore; zo[StoreStoreBarrier] = ignore; zo[StoreLoadBarrier] = ignore; uo[index(Call, C)] = CAST1(callC); uo[index(Call, R)] = CAST1(callR); uo[index(Call, M)] = CAST1(callM); uo[index(AlignedCall, C)] = CAST1(alignedCallC); uo[index(LongCall, C)] = CAST1(longCallC); uo[index(Jump, R)] = CAST1(jumpR); uo[index(Jump, C)] = CAST1(jumpC); uo[index(Jump, M)] = CAST1(jumpM); uo[index(JumpIfEqual, C)] = CAST1(jumpIfEqualC); uo[index(JumpIfNotEqual, C)] = CAST1(jumpIfNotEqualC); uo[index(JumpIfGreater, C)] = CAST1(jumpIfGreaterC); uo[index(JumpIfGreaterOrEqual, C)] = CAST1(jumpIfGreaterOrEqualC); uo[index(JumpIfLess, C)] = CAST1(jumpIfLessC); uo[index(JumpIfLessOrEqual, C)] = CAST1(jumpIfLessOrEqualC); uo[index(LongJump, C)] = CAST1(longJumpC); bo[index(Negate, R, R)] = CAST2(negateRR); bo[index(Move, R, R)] = CAST2(moveRR); bo[index(Move, C, R)] = CAST2(moveCR); bo[index(Move, M, R)] = CAST2(moveMR); bo[index(Move, R, M)] = CAST2(moveRM); bo[index(Move, C, M)] = CAST2(moveCM); bo[index(Move, A, R)] = CAST2(moveAR); bo[index(MoveZ, R, R)] = CAST2(moveZRR); bo[index(MoveZ, M, R)] = CAST2(moveZMR); bo[index(Compare, R, R)] = CAST2(compareRR); bo[index(Compare, C, R)] = CAST2(compareCR); bo[index(Compare, C, M)] = CAST2(compareCM); bo[index(Compare, R, M)] = CAST2(compareRM); bo[index(Add, R, R)] = CAST2(addRR); bo[index(Add, C, R)] = CAST2(addCR); bo[index(Subtract, C, R)] = CAST2(subtractCR); bo[index(Subtract, R, R)] = CAST2(subtractRR); bo[index(And, R, R)] = CAST2(andRR); bo[index(And, C, R)] = CAST2(andCR); bo[index(Or, R, R)] = CAST2(orRR); bo[index(Or, C, R)] = CAST2(orCR); bo[index(Xor, R, R)] = CAST2(xorRR); bo[index(Xor, C, R)] = CAST2(xorCR); bo[index(Multiply, R, R)] = CAST2(multiplyRR); bo[index(Multiply, C, R)] = CAST2(multiplyCR); bo[index(Divide, R, R)] = CAST2(divideRR); bo[index(Remainder, R, R)] = CAST2(remainderRR); bo[index(LongCompare, C, R)] = CAST2(longCompareCR); bo[index(LongCompare, R, R)] = CAST2(longCompareRR); bo[index(ShiftLeft, R, R)] = CAST2(shiftLeftRR); bo[index(ShiftLeft, C, R)] = CAST2(shiftLeftCR); bo[index(ShiftRight, R, R)] = CAST2(shiftRightRR); bo[index(ShiftRight, C, R)] = CAST2(shiftRightCR); bo[index(UnsignedShiftRight, R, R)] = CAST2(unsignedShiftRightRR); bo[index(UnsignedShiftRight, C, R)] = CAST2(unsignedShiftRightCR); } class MyArchitecture: public Assembler::Architecture { public: MyArchitecture(System* system): c(system), referenceCount(0) { populateTables(&c); } virtual unsigned registerCount() { return (BytesPerWord == 4 ? 8 : 16); } virtual int stack() { return rsp; } virtual int thread() { return rbx; } virtual int returnLow() { return rax; } virtual int returnHigh() { return (BytesPerWord == 4 ? rdx : NoRegister); } virtual bool condensedAddressing() { return true; } virtual bool bigEndian() { return false; } virtual bool reserved(int register_) { switch (register_) { case rbp: case rsp: case rbx: return true; default: return false; } } virtual unsigned argumentFootprint(unsigned footprint) { return max(footprint, footprint - argumentRegisterCount()); } virtual unsigned argumentRegisterCount() { #ifdef __WINDOWS__ if (BytesPerWord == 8) return 4; else #elif defined __LINUX__ if (BytesPerWord == 8) return 6; else #endif return 0; } virtual int argumentRegister(unsigned index) { assert(&c, BytesPerWord == 8); switch (index) { #ifdef __WINDOWS__ case 0: return rcx; case 1: return rdx; case 2: return r8; case 3: return r9; #elif defined __LINUX__ case 0: return rdi; case 1: return rsi; case 2: return rdx; case 3: return rcx; case 4: return r8; case 5: return r9; #endif default: abort(&c); } } virtual void updateCall(UnaryOperation op UNUSED, bool assertAlignment UNUSED, void* returnAddress, void* newTarget) { if (BytesPerWord == 4 or op == Call or op == Jump) { uint8_t* instruction = static_cast(returnAddress) - 5; assert(&c, ((op == Call or op == LongCall) and *instruction == 0xE8) or ((op == Jump or op == LongJump) and *instruction == 0xE9)); assert(&c, (not assertAlignment) or reinterpret_cast(instruction + 1) % 4 == 0); int32_t v = static_cast(newTarget) - static_cast(returnAddress); memcpy(instruction + 1, &v, 4); } else { uint8_t* instruction = static_cast(returnAddress) - 13; assert(&c, instruction[0] == 0x49 and instruction[1] == 0xBA); assert(&c, instruction[10] == 0x41 and instruction[11] == 0xFF); assert(&c, (op == LongCall and instruction[12] == 0xD2) or (op == LongJump and instruction[12] == 0xE2)); assert(&c, (not assertAlignment) or reinterpret_cast(instruction + 2) % 8 == 0); memcpy(instruction + 2, &newTarget, 8); } } virtual uintptr_t getConstant(const void* src) { uintptr_t v; memcpy(&v, src, BytesPerWord); return v; } virtual void setConstant(void* dst, uintptr_t constant) { memcpy(dst, &constant, BytesPerWord); } virtual unsigned alignFrameSize(unsigned sizeInWords) { const unsigned alignment = 16 / BytesPerWord; return (ceiling(sizeInWords + FrameHeaderSize, alignment) * alignment) - FrameHeaderSize; } virtual void* frameIp(void* stack) { return stack ? *static_cast(stack) : 0; } virtual unsigned frameHeaderSize() { return FrameHeaderSize; } virtual unsigned frameReturnAddressSize() { return 1; } virtual unsigned frameFooterSize() { return 0; } virtual void nextFrame(void** stack, void** base) { assert(&c, *static_cast(*base) != *base); *stack = static_cast(*base) + 1; *base = *static_cast(*base); } virtual void plan (UnaryOperation, unsigned, uint8_t* aTypeMask, uint64_t* aRegisterMask, bool* thunk) { *aTypeMask = (1 << RegisterOperand) | (1 << MemoryOperand) | (1 << ConstantOperand); *aRegisterMask = ~static_cast(0); *thunk = false; } virtual void plan (BinaryOperation op, unsigned aSize, uint8_t* aTypeMask, uint64_t* aRegisterMask, unsigned bSize, uint8_t* bTypeMask, uint64_t* bRegisterMask, bool* thunk) { *aTypeMask = ~0; *aRegisterMask = ~static_cast(0); *bTypeMask = (1 << RegisterOperand) | (1 << MemoryOperand); *bRegisterMask = ~static_cast(0); *thunk = false; switch (op) { case Compare: *aTypeMask = (1 << RegisterOperand) | (1 << ConstantOperand); *bTypeMask = (1 << RegisterOperand); break; case Negate: *aTypeMask = (1 << RegisterOperand); *bTypeMask = (1 << RegisterOperand); *aRegisterMask = (static_cast(1) << (rdx + 32)) | (static_cast(1) << rax); *bRegisterMask = *aRegisterMask; break; case Move: if (BytesPerWord == 4) { if (aSize == 4 and bSize == 8) { const uint32_t mask = ~((1 << rax) | (1 << rdx)); *aRegisterMask = (static_cast(mask) << 32) | mask; *bRegisterMask = (static_cast(1) << (rdx + 32)) | (static_cast(1) << rax); } else if (aSize == 1 or bSize == 1) { const uint32_t mask = (1 << rax) | (1 << rcx) | (1 << rdx) | (1 << rbx); *aRegisterMask = (static_cast(mask) << 32) | mask; *bRegisterMask = (static_cast(mask) << 32) | mask; } } break; default: break; } } virtual void plan (TernaryOperation op, unsigned aSize, uint8_t* aTypeMask, uint64_t* aRegisterMask, unsigned, uint8_t* bTypeMask, uint64_t* bRegisterMask, unsigned, uint8_t* cTypeMask, uint64_t* cRegisterMask, bool* thunk) { *aTypeMask = (1 << RegisterOperand) | (1 << ConstantOperand); *aRegisterMask = ~static_cast(0); *bTypeMask = (1 << RegisterOperand); *bRegisterMask = ~static_cast(0); *thunk = false; switch (op) { case Multiply: if (BytesPerWord == 4 and aSize == 8) { const uint32_t mask = ~((1 << rax) | (1 << rdx)); *aRegisterMask = (static_cast(mask) << 32) | mask; *bRegisterMask = (static_cast(1) << (rdx + 32)) | mask; } break; case Divide: if (BytesPerWord == 4 and aSize == 8) { *bTypeMask = ~0; *thunk = true; } else { *aTypeMask = (1 << RegisterOperand); *aRegisterMask = ~((1 << rax) | (1 << rdx)); *bRegisterMask = 1 << rax; } break; case Remainder: if (BytesPerWord == 4 and aSize == 8) { *bTypeMask = ~0; *thunk = true; } else { *aTypeMask = (1 << RegisterOperand); *aRegisterMask = ~((1 << rax) | (1 << rdx)); *bRegisterMask = 1 << rax; } break; case ShiftLeft: case ShiftRight: case UnsignedShiftRight: { *aRegisterMask = (~static_cast(0) << 32) | (static_cast(1) << rcx); const uint32_t mask = ~(1 << rcx); *bRegisterMask = (static_cast(mask) << 32) | mask; } break; default: break; } *cTypeMask = *bTypeMask; *cRegisterMask = *bRegisterMask; } virtual void acquire() { ++ referenceCount; } virtual void release() { if (-- referenceCount == 0) { c.s->free(this); } } ArchitectureContext c; unsigned referenceCount; }; class MyAssembler: public Assembler { public: MyAssembler(System* s, Allocator* a, Zone* zone, MyArchitecture* arch): c(s, a, zone), arch_(arch) { } virtual void setClient(Client* client) { assert(&c, c.client == 0); c.client = client; } virtual Architecture* arch() { return arch_; } virtual void saveFrame(unsigned stackOffset, unsigned baseOffset) { Register stack(rsp); Memory stackDst(rbx, stackOffset); apply(Move, BytesPerWord, RegisterOperand, &stack, BytesPerWord, MemoryOperand, &stackDst); Register base(rbp); Memory baseDst(rbx, baseOffset); apply(Move, BytesPerWord, RegisterOperand, &base, BytesPerWord, MemoryOperand, &baseDst); } virtual void pushFrame(unsigned argumentCount, ...) { struct { unsigned size; OperandType type; Operand* operand; } arguments[argumentCount]; va_list a; va_start(a, argumentCount); unsigned footprint = 0; for (unsigned i = 0; i < argumentCount; ++i) { arguments[i].size = va_arg(a, unsigned); arguments[i].type = static_cast(va_arg(a, int)); arguments[i].operand = va_arg(a, Operand*); footprint += ceiling(arguments[i].size, BytesPerWord); } va_end(a); allocateFrame(arch_->alignFrameSize(footprint)); unsigned offset = 0; for (unsigned i = 0; i < argumentCount; ++i) { if (i < arch_->argumentRegisterCount()) { Register dst(arch_->argumentRegister(i)); apply(Move, arguments[i].size, arguments[i].type, arguments[i].operand, pad(arguments[i].size), RegisterOperand, &dst); } else { Memory dst(rsp, offset * BytesPerWord); apply(Move, arguments[i].size, arguments[i].type, arguments[i].operand, pad(arguments[i].size), MemoryOperand, &dst); offset += ceiling(arguments[i].size, BytesPerWord); } } } virtual void allocateFrame(unsigned footprint) { Register base(rbp); pushR(&c, BytesPerWord, &base); Register stack(rsp); apply(Move, BytesPerWord, RegisterOperand, &stack, BytesPerWord, RegisterOperand, &base); Constant footprintConstant(resolved(&c, footprint * BytesPerWord)); apply(Subtract, BytesPerWord, ConstantOperand, &footprintConstant, BytesPerWord, RegisterOperand, &stack, BytesPerWord, RegisterOperand, &stack); } virtual void popFrame() { Register base(rbp); Register stack(rsp); apply(Move, BytesPerWord, RegisterOperand, &base, BytesPerWord, RegisterOperand, &stack); popR(&c, BytesPerWord, &base); } virtual void apply(Operation op) { arch_->c.operations[op](&c); } virtual void apply(UnaryOperation op, unsigned aSize, OperandType aType, Operand* aOperand) { arch_->c.unaryOperations[index(op, aType)](&c, aSize, aOperand); } virtual void apply(BinaryOperation op, unsigned aSize, OperandType aType, Operand* aOperand, unsigned bSize, OperandType bType, Operand* bOperand) { arch_->c.binaryOperations[index(op, aType, bType)] (&c, aSize, aOperand, bSize, bOperand); } virtual void apply(TernaryOperation op, unsigned aSize, OperandType aType, Operand* aOperand, unsigned bSize, OperandType bType, Operand* bOperand, unsigned cSize UNUSED, OperandType cType UNUSED, Operand*) { assert(&c, bSize == cSize); assert(&c, bType == cType); arch_->c.binaryOperations[index(op, aType, bType)] (&c, aSize, aOperand, bSize, bOperand); } virtual void writeTo(uint8_t* dst) { c.result = dst; for (MyBlock* b = c.firstBlock; b; b = b->next) { unsigned index = 0; unsigned padding = 0; for (AlignmentPadding* p = b->firstPadding; p; p = p->next) { unsigned size = p->offset - b->offset - index; memcpy(dst + b->start + index + padding, c.code.data + b->offset + index, size); index += size; while ((b->start + index + padding + 1) % 4) { *(dst + b->start + index + padding) = 0x90; ++ padding; } } memcpy(dst + b->start + index + padding, c.code.data + b->offset + index, b->size - index); } for (Task* t = c.tasks; t; t = t->next) { t->run(&c); } } virtual Promise* offset() { return ::offset(&c); } virtual Block* endBlock(bool startNew) { MyBlock* b = c.lastBlock; b->size = c.code.length() - b->offset; if (startNew) { c.lastBlock = new (c.zone->allocate(sizeof(MyBlock))) MyBlock(c.code.length()); } else { c.lastBlock = 0; } return b; } virtual unsigned length() { return c.code.length(); } virtual void dispose() { c.code.dispose(); } Context c; MyArchitecture* arch_; }; } // namespace namespace vm { Assembler::Architecture* makeArchitecture(System* system) { return new (allocate(system, sizeof(MyArchitecture))) MyArchitecture(system); } Assembler* makeAssembler(System* system, Allocator* allocator, Zone* zone, Assembler::Architecture* architecture) { return new (zone->allocate(sizeof(MyAssembler))) MyAssembler(system, allocator, zone, static_cast(architecture)); } } // namespace vm #endif //(defined __i386__) || (defined __x86_64__)