test/cctest/test-assembler-x64.cc - platform/external/v8 - Git at Google

 // 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 v8::internal::Assembler;
 using v8::internal::CodeDesc;
 using v8::internal::FUNCTION_CAST;
 using v8::internal::Immediate;
 using v8::internal::Isolate;
 using v8::internal::Label;
 using v8::internal::OS;
 using v8::internal::Operand;
 using v8::internal::byte;
 using v8::internal::greater;
 using v8::internal::less_equal;
 using v8::internal::not_equal;
 using v8::internal::r13;
 using v8::internal::r15;
 using v8::internal::r8;
 using v8::internal::r9;
 using v8::internal::rax;
 using v8::internal::rbp;
 using v8::internal::rcx;
 using v8::internal::rdi;
 using v8::internal::rdx;
 using v8::internal::rsi;
 using v8::internal::rsp;
 using v8::internal::times_1;

 // 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);

 #ifdef _WIN64
 static const v8::internal::Register arg1 = rcx;
 static const v8::internal::Register arg2 = rdx;
 #else
 static const v8::internal::Register arg1 = rdi;
 static const v8::internal::Register arg2 = rsi;
 #endif

 #define __ assm.


 TEST(AssemblerX64ReturnOperation) {
   OS::Setup();
   // 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(Isolate::Current(), 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) {
   OS::Setup();
   // 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(Isolate::Current(), 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) {
   OS::Setup();
   // 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(Isolate::Current(), 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) {
   OS::Setup();
   // 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(Isolate::Current(), 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(AssemblerX64MemoryOperands) {
   OS::Setup();
   // 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(Isolate::Current(), 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) {
   OS::Setup();
   // 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(Isolate::Current(), 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) {
   OS::Setup();
   // 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(Isolate::Current(), 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));
   }
 }

 #undef __
	// 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 v8::internal::Assembler;
	using v8::internal::CodeDesc;
	using v8::internal::FUNCTION_CAST;
	using v8::internal::Immediate;
	using v8::internal::Isolate;
	using v8::internal::Label;
	using v8::internal::OS;
	using v8::internal::Operand;
	using v8::internal::byte;
	using v8::internal::greater;
	using v8::internal::less_equal;
	using v8::internal::not_equal;
	using v8::internal::r13;
	using v8::internal::r15;
	using v8::internal::r8;
	using v8::internal::r9;
	using v8::internal::rax;
	using v8::internal::rbp;
	using v8::internal::rcx;
	using v8::internal::rdi;
	using v8::internal::rdx;
	using v8::internal::rsi;
	using v8::internal::rsp;
	using v8::internal::times_1;

	// 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);

	#ifdef _WIN64
	static const v8::internal::Register arg1 = rcx;
	static const v8::internal::Register arg2 = rdx;
	#else
	static const v8::internal::Register arg1 = rdi;
	static const v8::internal::Register arg2 = rsi;
	#endif

	#define __ assm.


	TEST(AssemblerX64ReturnOperation) {
	OS::Setup();
	// 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(Isolate::Current(), 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) {
	OS::Setup();
	// 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(Isolate::Current(), 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) {
	OS::Setup();
	// 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(Isolate::Current(), 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) {
	OS::Setup();
	// 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(Isolate::Current(), 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(AssemblerX64MemoryOperands) {
	OS::Setup();
	// 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(Isolate::Current(), 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) {
	OS::Setup();
	// 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(Isolate::Current(), 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) {
	OS::Setup();
	// 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(Isolate::Current(), 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));
	}
	}

	#undef __