CSE2410 Fall 2014 Bounce

// Copyright 2009 the V8 project authors. All rights reserved.

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// 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.

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//       copyright notice, this list of conditions and the following

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//       with the distribution.

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//       contributors may be used to endorse or promote products derived

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//

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// 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

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#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 __