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// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include "v8.h"
#include "macro-assembler.h"
#include "factory.h"
#include "platform.h"
#include "serialize.h"
#include "cctest.h"
using namespace v8::internal;
// Test the x64 assembler by compiling some simple functions into
// a buffer and executing them. These tests do not initialize the
// V8 library, create a context, or use any V8 objects.
// The AMD64 calling convention is used, with the first six arguments
// in RDI, RSI, RDX, RCX, R8, and R9, and floating point arguments in
// the XMM registers. The return value is in RAX.
// This calling convention is used on Linux, with GCC, and on Mac OS,
// with GCC. A different convention is used on 64-bit windows,
// where the first four integer arguments are passed in RCX, RDX, R8 and R9.
typedef int (*F0)();
typedef int (*F1)(int64_t x);
typedef int (*F2)(int64_t x, int64_t y);
typedef int (*F3)(double x);
typedef int64_t (*F4)(int64_t* x, int64_t* y);
typedef int64_t (*F5)(int64_t x);
#ifdef _WIN64
static const Register arg1 = rcx;
static const Register arg2 = rdx;
#else
static const Register arg1 = rdi;
static const Register arg2 = rsi;
#endif
#define __ assm.
TEST(AssemblerX64ReturnOperation) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that copies argument 2 and returns it.
__ movq(rax, arg2);
__ nop();
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(2, result);
}
TEST(AssemblerX64StackOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that copies argument 2 and returns it.
// We compile without stack frame pointers, so the gdb debugger shows
// incorrect stack frames when debugging this function (which has them).
__ push(rbp);
__ movq(rbp, rsp);
__ push(arg2); // Value at (rbp - 8)
__ push(arg2); // Value at (rbp - 16)
__ push(arg1); // Value at (rbp - 24)
__ pop(rax);
__ pop(rax);
__ pop(rax);
__ pop(rbp);
__ nop();
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(2, result);
}
TEST(AssemblerX64ArithmeticOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that adds arguments returning the sum.
__ movq(rax, arg2);
__ addq(rax, arg1);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(5, result);
}
TEST(AssemblerX64ImulOperation) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that multiplies arguments returning the high
// word.
__ movq(rax, arg2);
__ imul(arg1);
__ movq(rax, rdx);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(0, result);
result = FUNCTION_CAST<F2>(buffer)(0x100000000l, 0x100000000l);
CHECK_EQ(1, result);
result = FUNCTION_CAST<F2>(buffer)(-0x100000000l, 0x100000000l);
CHECK_EQ(-1, result);
}
TEST(AssemblerX64XchglOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
__ movq(rax, Operand(arg1, 0));
__ movq(rbx, Operand(arg2, 0));
__ xchgl(rax, rbx);
__ movq(Operand(arg1, 0), rax);
__ movq(Operand(arg2, 0), rbx);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 40000000), left);
CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 20000000), right);
USE(result);
}
TEST(AssemblerX64OrlOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
__ movq(rax, Operand(arg2, 0));
__ orl(Operand(arg1, 0), rax);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 60000000), left);
USE(result);
}
TEST(AssemblerX64RollOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
__ movq(rax, arg1);
__ roll(rax, Immediate(1));
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t src = V8_2PART_UINT64_C(0x10000000, C0000000);
int64_t result = FUNCTION_CAST<F5>(buffer)(src);
CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 80000001), result);
}
TEST(AssemblerX64SublOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
__ movq(rax, Operand(arg2, 0));
__ subl(Operand(arg1, 0), rax);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
int64_t right = V8_2PART_UINT64_C(0x30000000, 40000000);
int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
CHECK_EQ(V8_2PART_UINT64_C(0x10000000, e0000000), left);
USE(result);
}
TEST(AssemblerX64TestlOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Set rax with the ZF flag of the testl instruction.
Label done;
__ movq(rax, Immediate(1));
__ movq(rbx, Operand(arg2, 0));
__ testl(Operand(arg1, 0), rbx);
__ j(zero, &done, Label::kNear);
__ movq(rax, Immediate(0));
__ bind(&done);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
int64_t right = V8_2PART_UINT64_C(0x30000000, 00000000);
int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
CHECK_EQ(static_cast<int64_t>(1), result);
}
TEST(AssemblerX64XorlOperations) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
__ movq(rax, Operand(arg2, 0));
__ xorl(Operand(arg1, 0), rax);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int64_t left = V8_2PART_UINT64_C(0x10000000, 20000000);
int64_t right = V8_2PART_UINT64_C(0x30000000, 60000000);
int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 40000000), left);
USE(result);
}
TEST(AssemblerX64MemoryOperands) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that copies argument 2 and returns it.
__ push(rbp);
__ movq(rbp, rsp);
__ push(arg2); // Value at (rbp - 8)
__ push(arg2); // Value at (rbp - 16)
__ push(arg1); // Value at (rbp - 24)
const int kStackElementSize = 8;
__ movq(rax, Operand(rbp, -3 * kStackElementSize));
__ pop(arg2);
__ pop(arg2);
__ pop(arg2);
__ pop(rbp);
__ nop();
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(3, result);
}
TEST(AssemblerX64ControlFlow) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble a simple function that copies argument 1 and returns it.
__ push(rbp);
__ movq(rbp, rsp);
__ movq(rax, arg1);
Label target;
__ jmp(&target);
__ movq(rax, arg2);
__ bind(&target);
__ pop(rbp);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F2>(buffer)(3, 2);
CHECK_EQ(3, result);
}
TEST(AssemblerX64LoopImmediates) {
// Allocate an executable page of memory.
size_t actual_size;
byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
&actual_size,
true));
CHECK(buffer);
Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
// Assemble two loops using rax as counter, and verify the ending counts.
Label Fail;
__ movq(rax, Immediate(-3));
Label Loop1_test;
Label Loop1_body;
__ jmp(&Loop1_test);
__ bind(&Loop1_body);
__ addq(rax, Immediate(7));
__ bind(&Loop1_test);
__ cmpq(rax, Immediate(20));
__ j(less_equal, &Loop1_body);
// Did the loop terminate with the expected value?
__ cmpq(rax, Immediate(25));
__ j(not_equal, &Fail);
Label Loop2_test;
Label Loop2_body;
__ movq(rax, Immediate(0x11FEED00));
__ jmp(&Loop2_test);
__ bind(&Loop2_body);
__ addq(rax, Immediate(-0x1100));
__ bind(&Loop2_test);
__ cmpq(rax, Immediate(0x11FE8000));
__ j(greater, &Loop2_body);
// Did the loop terminate with the expected value?
__ cmpq(rax, Immediate(0x11FE7600));
__ j(not_equal, &Fail);
__ movq(rax, Immediate(1));
__ ret(0);
__ bind(&Fail);
__ movq(rax, Immediate(0));
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
// Call the function from C++.
int result = FUNCTION_CAST<F0>(buffer)();
CHECK_EQ(1, result);
}
TEST(OperandRegisterDependency) {
int offsets[4] = {0, 1, 0xfed, 0xbeefcad};
for (int i = 0; i < 4; i++) {
int offset = offsets[i];
CHECK(Operand(rax, offset).AddressUsesRegister(rax));
CHECK(!Operand(rax, offset).AddressUsesRegister(r8));
CHECK(!Operand(rax, offset).AddressUsesRegister(rcx));
CHECK(Operand(rax, rax, times_1, offset).AddressUsesRegister(rax));
CHECK(!Operand(rax, rax, times_1, offset).AddressUsesRegister(r8));
CHECK(!Operand(rax, rax, times_1, offset).AddressUsesRegister(rcx));
CHECK(Operand(rax, rcx, times_1, offset).AddressUsesRegister(rax));
CHECK(Operand(rax, rcx, times_1, offset).AddressUsesRegister(rcx));
CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(r8));
CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(r9));
CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(rdx));
CHECK(!Operand(rax, rcx, times_1, offset).AddressUsesRegister(rsp));
CHECK(Operand(rsp, offset).AddressUsesRegister(rsp));
CHECK(!Operand(rsp, offset).AddressUsesRegister(rax));
CHECK(!Operand(rsp, offset).AddressUsesRegister(r15));
CHECK(Operand(rbp, offset).AddressUsesRegister(rbp));
CHECK(!Operand(rbp, offset).AddressUsesRegister(rax));
CHECK(!Operand(rbp, offset).AddressUsesRegister(r13));
CHECK(Operand(rbp, rax, times_1, offset).AddressUsesRegister(rbp));
CHECK(Operand(rbp, rax, times_1, offset).AddressUsesRegister(rax));
CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(rcx));
CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(r13));
CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(r8));
CHECK(!Operand(rbp, rax, times_1, offset).AddressUsesRegister(rsp));
CHECK(Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rsp));
CHECK(Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rbp));
CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(rax));
CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(r15));
CHECK(!Operand(rsp, rbp, times_1, offset).AddressUsesRegister(r13));
}
}
TEST(AssemblerX64LabelChaining) {
// Test chaining of label usages within instructions (issue 1644).
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Assembler assm(CcTest::i_isolate(), NULL, 0);
Label target;
__ j(equal, &target);
__ j(not_equal, &target);
__ bind(&target);
__ nop();
}
TEST(AssemblerMultiByteNop) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
byte buffer[1024];
Isolate* isolate = CcTest::i_isolate();
Assembler assm(isolate, buffer, sizeof(buffer));
__ push(rbx);
__ push(rcx);
__ push(rdx);
__ push(rdi);
__ push(rsi);
__ movq(rax, Immediate(1));
__ movq(rbx, Immediate(2));
__ movq(rcx, Immediate(3));
__ movq(rdx, Immediate(4));
__ movq(rdi, Immediate(5));
__ movq(rsi, Immediate(6));
for (int i = 0; i < 16; i++) {
int before = assm.pc_offset();
__ Nop(i);
CHECK_EQ(assm.pc_offset() - before, i);
}
Label fail;
__ cmpq(rax, Immediate(1));
__ j(not_equal, &fail);
__ cmpq(rbx, Immediate(2));
__ j(not_equal, &fail);
__ cmpq(rcx, Immediate(3));
__ j(not_equal, &fail);
__ cmpq(rdx, Immediate(4));
__ j(not_equal, &fail);
__ cmpq(rdi, Immediate(5));
__ j(not_equal, &fail);
__ cmpq(rsi, Immediate(6));
__ j(not_equal, &fail);
__ movq(rax, Immediate(42));
__ pop(rsi);
__ pop(rdi);
__ pop(rdx);
__ pop(rcx);
__ pop(rbx);
__ ret(0);
__ bind(&fail);
__ movq(rax, Immediate(13));
__ pop(rsi);
__ pop(rdi);
__ pop(rdx);
__ pop(rcx);
__ pop(rbx);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
Code* code = Code::cast(isolate->heap()->CreateCode(
desc,
Code::ComputeFlags(Code::STUB),
Handle<Code>())->ToObjectChecked());
CHECK(code->IsCode());
F0 f = FUNCTION_CAST<F0>(code->entry());
int res = f();
CHECK_EQ(42, res);
}
#ifdef __GNUC__
#define ELEMENT_COUNT 4
void DoSSE2(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::HandleScope scope(CcTest::isolate());
byte buffer[1024];
CHECK(args[0]->IsArray());
v8::Local<v8::Array> vec = v8::Local<v8::Array>::Cast(args[0]);
CHECK_EQ(ELEMENT_COUNT, vec->Length());
Isolate* isolate = CcTest::i_isolate();
Assembler assm(isolate, buffer, sizeof(buffer));
// Remove return address from the stack for fix stack frame alignment.
__ pop(rcx);
// Store input vector on the stack.
for (int i = 0; i < ELEMENT_COUNT; i++) {
__ movl(rax, Immediate(vec->Get(i)->Int32Value()));
__ shl(rax, Immediate(0x20));
__ or_(rax, Immediate(vec->Get(++i)->Int32Value()));
__ push(rax);
}
// Read vector into a xmm register.
__ xorps(xmm0, xmm0);
__ movdqa(xmm0, Operand(rsp, 0));
// Create mask and store it in the return register.
__ movmskps(rax, xmm0);
// Remove unused data from the stack.
__ addq(rsp, Immediate(ELEMENT_COUNT * sizeof(int32_t)));
// Restore return address.
__ push(rcx);
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
Code* code = Code::cast(isolate->heap()->CreateCode(
desc,
Code::ComputeFlags(Code::STUB),
Handle<Code>())->ToObjectChecked());
CHECK(code->IsCode());
F0 f = FUNCTION_CAST<F0>(code->entry());
int res = f();
args.GetReturnValue().Set(v8::Integer::New(res));
}
TEST(StackAlignmentForSSE2) {
CcTest::InitializeVM();
CHECK_EQ(0, OS::ActivationFrameAlignment() % 16);
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
v8::Handle<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
global_template->Set(v8_str("do_sse2"), v8::FunctionTemplate::New(DoSSE2));
LocalContext env(NULL, global_template);
CompileRun(
"function foo(vec) {"
" return do_sse2(vec);"
"}");
v8::Local<v8::Object> global_object = env->Global();
v8::Local<v8::Function> foo =
v8::Local<v8::Function>::Cast(global_object->Get(v8_str("foo")));
int32_t vec[ELEMENT_COUNT] = { -1, 1, 1, 1 };
v8::Local<v8::Array> v8_vec = v8::Array::New(ELEMENT_COUNT);
for (int i = 0; i < ELEMENT_COUNT; i++) {
v8_vec->Set(i, v8_num(vec[i]));
}
v8::Local<v8::Value> args[] = { v8_vec };
v8::Local<v8::Value> result = foo->Call(global_object, 1, args);
// The mask should be 0b1000.
CHECK_EQ(8, result->Int32Value());
}
#undef ELEMENT_COUNT
#endif // __GNUC__
TEST(AssemblerX64Extractps) {
CcTest::InitializeVM();
if (!CpuFeatures::IsSupported(SSE4_1)) return;
v8::HandleScope scope(CcTest::isolate());
byte buffer[256];
Isolate* isolate = CcTest::i_isolate();
Assembler assm(isolate, buffer, sizeof(buffer));
{ CpuFeatureScope fscope2(&assm, SSE4_1);
__ extractps(rax, xmm0, 0x1);
__ ret(0);
}
CodeDesc desc;
assm.GetCode(&desc);
Code* code = Code::cast(isolate->heap()->CreateCode(
desc,
Code::ComputeFlags(Code::STUB),
Handle<Code>())->ToObjectChecked());
CHECK(code->IsCode());
#ifdef OBJECT_PRINT
Code::cast(code)->Print();
#endif
F3 f = FUNCTION_CAST<F3>(Code::cast(code)->entry());
uint64_t value1 = V8_2PART_UINT64_C(0x12345678, 87654321);
CHECK_EQ(0x12345678, f(uint64_to_double(value1)));
uint64_t value2 = V8_2PART_UINT64_C(0x87654321, 12345678);
CHECK_EQ(0x87654321, f(uint64_to_double(value2)));
}
#undef __