X64: Added register holding Smi::FromInt(1).

test/cctest/test-macro-assembler-x64.cc

 // 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
@@ skipping 39 matching lines @@
 using v8::internal::rbx;
 using v8::internal::rsi;
 using v8::internal::rdi;
 using v8::internal::rcx;
 using v8::internal::rdx;
 using v8::internal::rbp;
 using v8::internal::rsp;
 using v8::internal::r8;
 using v8::internal::r9;
 using v8::internal::r11;
-using v8::internal::r12;  // Remember: r12..r15 are callee save!
+using v8::internal::r12;
 using v8::internal::r13;
 using v8::internal::r14;
-using v8::internal::r15;
 using v8::internal::times_pointer_size;
 using v8::internal::FUNCTION_CAST;
 using v8::internal::CodeDesc;
 using v8::internal::less_equal;
 using v8::internal::not_equal;
 using v8::internal::not_zero;
 using v8::internal::greater;
 using v8::internal::greater_equal;
 using v8::internal::carry;
 using v8::internal::not_carry;
@@ skipping 11 matching lines @@
 // The AMD64 calling convention is used, with the first five arguments
 // in RSI, RDI, 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.
 
 typedef int (*F0)();
 
 #define __ masm->
 
+
+static void EntryCode(MacroAssembler* masm) {
+  // Smi constant register is callee save.
+  __ push(v8::internal::kSmiConstantRegister);
+  __ InitializeSmiConstantRegister();
+}
+
+
+static void ExitCode(MacroAssembler* masm) {
+  // Return -1 if kSmiConstantRegister was clobbered during the test.
+  __ Move(rdx, Smi::FromInt(1));
+  __ cmpq(rdx, v8::internal::kSmiConstantRegister);
+  __ movq(rdx, Immediate(-1));
+  __ cmovq(not_equal, rax, rdx);
+  __ pop(v8::internal::kSmiConstantRegister);
+}
+
+
 TEST(Smi) {
   // Check that C++ Smi operations work as expected.
   int64_t test_numbers[] = {
       0, 1, -1, 127, 128, -128, -129, 255, 256, -256, -257,
       Smi::kMaxValue, static_cast<int64_t>(Smi::kMaxValue) + 1,
       Smi::kMinValue, static_cast<int64_t>(Smi::kMinValue) - 1
   };
   int test_number_count = 15;
   for (int i = 0; i < test_number_count; i++) {
     int64_t number = test_numbers[i];
@@ skipping 27 matching lines @@
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                    &actual_size,
                                                    true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
   MacroAssembler* masm = &assembler;  // Create a pointer for the __ macro.
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestMoveSmi(masm, &exit, 1, Smi::FromInt(0));
   TestMoveSmi(masm, &exit, 2, Smi::FromInt(127));
   TestMoveSmi(masm, &exit, 3, Smi::FromInt(128));
   TestMoveSmi(masm, &exit, 4, Smi::FromInt(255));
   TestMoveSmi(masm, &exit, 5, Smi::FromInt(256));
   TestMoveSmi(masm, &exit, 6, Smi::FromInt(Smi::kMaxValue));
   TestMoveSmi(masm, &exit, 7, Smi::FromInt(-1));
   TestMoveSmi(masm, &exit, 8, Smi::FromInt(-128));
   TestMoveSmi(masm, &exit, 9, Smi::FromInt(-129));
   TestMoveSmi(masm, &exit, 10, Smi::FromInt(-256));
   TestMoveSmi(masm, &exit, 11, Smi::FromInt(-257));
   TestMoveSmi(masm, &exit, 12, Smi::FromInt(Smi::kMinValue));
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 49 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiCompare(masm, &exit, 0x10, 0, 0);
   TestSmiCompare(masm, &exit, 0x20, 0, 1);
   TestSmiCompare(masm, &exit, 0x30, 1, 0);
   TestSmiCompare(masm, &exit, 0x40, 1, 1);
   TestSmiCompare(masm, &exit, 0x50, 0, -1);
   TestSmiCompare(masm, &exit, 0x60, -1, 0);
   TestSmiCompare(masm, &exit, 0x70, -1, -1);
   TestSmiCompare(masm, &exit, 0x80, 0, Smi::kMinValue);
   TestSmiCompare(masm, &exit, 0x90, Smi::kMinValue, 0);
   TestSmiCompare(masm, &exit, 0xA0, 0, Smi::kMaxValue);
   TestSmiCompare(masm, &exit, 0xB0, Smi::kMaxValue, 0);
   TestSmiCompare(masm, &exit, 0xC0, -1, Smi::kMinValue);
   TestSmiCompare(masm, &exit, 0xD0, Smi::kMinValue, -1);
   TestSmiCompare(masm, &exit, 0xE0, -1, Smi::kMaxValue);
   TestSmiCompare(masm, &exit, 0xF0, Smi::kMaxValue, -1);
   TestSmiCompare(masm, &exit, 0x100, Smi::kMinValue, Smi::kMinValue);
   TestSmiCompare(masm, &exit, 0x110, Smi::kMinValue, Smi::kMaxValue);
   TestSmiCompare(masm, &exit, 0x120, Smi::kMaxValue, Smi::kMinValue);
   TestSmiCompare(masm, &exit, 0x130, Smi::kMaxValue, Smi::kMaxValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 
 TEST(Integer32ToSmi) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   __ movq(rax, Immediate(1));  // Test number.
   __ movl(rcx, Immediate(0));
   __ Integer32ToSmi(rcx, rcx);
   __ Set(rdx, reinterpret_cast<intptr_t>(Smi::FromInt(0)));
   __ SmiCompare(rcx, rdx);
   __ j(not_equal, &exit);
 
   __ movq(rax, Immediate(2));  // Test number.
@@ skipping 57 matching lines @@
   __ movq(rax, Immediate(10));  // Test number.
   __ movl(rcx, Immediate(Smi::kMinValue));
   __ Integer32ToSmi(r8, rcx);
   __ Set(rdx, reinterpret_cast<intptr_t>(Smi::FromInt(Smi::kMinValue)));
   __ SmiCompare(r8, rdx);
   __ j(not_equal, &exit);
 
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 28 matching lines @@
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   int64_t twice_max = static_cast<int64_t>(Smi::kMaxValue) * 2;
 
   TestI64PlusConstantToSmi(masm, &exit, 0x10, 0, 0);
   TestI64PlusConstantToSmi(masm, &exit, 0x20, 0, 1);
   TestI64PlusConstantToSmi(masm, &exit, 0x30, 1, 0);
   TestI64PlusConstantToSmi(masm, &exit, 0x40, Smi::kMaxValue - 5, 5);
   TestI64PlusConstantToSmi(masm, &exit, 0x50, Smi::kMinValue + 5, 5);
   TestI64PlusConstantToSmi(masm, &exit, 0x60, twice_max, -Smi::kMaxValue);
   TestI64PlusConstantToSmi(masm, &exit, 0x70, -twice_max, Smi::kMaxValue);
   TestI64PlusConstantToSmi(masm, &exit, 0x80, 0, Smi::kMinValue);
   TestI64PlusConstantToSmi(masm, &exit, 0x90, 0, Smi::kMaxValue);
   TestI64PlusConstantToSmi(masm, &exit, 0xA0, Smi::kMinValue, 0);
   TestI64PlusConstantToSmi(masm, &exit, 0xB0, Smi::kMaxValue, 0);
   TestI64PlusConstantToSmi(masm, &exit, 0xC0, twice_max, Smi::kMinValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 TEST(SmiCheck) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                    &actual_size,
                                                    true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
   Condition cond;
 
   __ movl(rax, Immediate(1));  // Test number.
 
   // CheckSmi
 
   __ movl(rcx, Immediate(0));
   __ Integer32ToSmi(rcx, rcx);
   cond = masm->CheckSmi(rcx);
@@ skipping 155 matching lines @@
 
   __ incq(rax);
   __ movq(rcx, Immediate(Smi::kMinValue));
   cond = masm->CheckInteger32ValidSmiValue(rax);
   __ j(NegateCondition(cond), &exit);
 
   // Success
   __ xor_(rax, rax);
 
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 50 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiNeg(masm, &exit, 0x10, 0);
   TestSmiNeg(masm, &exit, 0x20, 1);
   TestSmiNeg(masm, &exit, 0x30, -1);
   TestSmiNeg(masm, &exit, 0x40, 127);
   TestSmiNeg(masm, &exit, 0x50, 65535);
   TestSmiNeg(masm, &exit, 0x60, Smi::kMinValue);
   TestSmiNeg(masm, &exit, 0x70, Smi::kMaxValue);
   TestSmiNeg(masm, &exit, 0x80, -Smi::kMaxValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 52 matching lines @@
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   // No-overflow tests.
   SmiAddTest(masm, &exit, 0x10, 1, 2);
   SmiAddTest(masm, &exit, 0x20, 1, -2);
   SmiAddTest(masm, &exit, 0x30, -1, 2);
   SmiAddTest(masm, &exit, 0x40, -1, -2);
   SmiAddTest(masm, &exit, 0x50, 0x1000, 0x2000);
   SmiAddTest(masm, &exit, 0x60, Smi::kMinValue, 5);
   SmiAddTest(masm, &exit, 0x70, Smi::kMaxValue, -5);
   SmiAddTest(masm, &exit, 0x80, Smi::kMaxValue, Smi::kMinValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 153 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   SmiSubTest(masm, &exit, 0x10, 1, 2);
   SmiSubTest(masm, &exit, 0x20, 1, -2);
   SmiSubTest(masm, &exit, 0x30, -1, 2);
   SmiSubTest(masm, &exit, 0x40, -1, -2);
   SmiSubTest(masm, &exit, 0x50, 0x1000, 0x2000);
   SmiSubTest(masm, &exit, 0x60, Smi::kMinValue, -5);
   SmiSubTest(masm, &exit, 0x70, Smi::kMaxValue, 5);
   SmiSubTest(masm, &exit, 0x80, -Smi::kMaxValue, Smi::kMinValue);
   SmiSubTest(masm, &exit, 0x90, 0, Smi::kMaxValue);
 
   SmiSubOverflowTest(masm, &exit, 0xA0, 1);
   SmiSubOverflowTest(masm, &exit, 0xB0, 1024);
   SmiSubOverflowTest(masm, &exit, 0xC0, Smi::kMaxValue);
   SmiSubOverflowTest(masm, &exit, 0xD0, -2);
   SmiSubOverflowTest(masm, &exit, 0xE0, -42000);
   SmiSubOverflowTest(masm, &exit, 0xF0, Smi::kMinValue);
   SmiSubOverflowTest(masm, &exit, 0x100, 0);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 45 matching lines @@
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiMul(masm, &exit, 0x10, 0, 0);
   TestSmiMul(masm, &exit, 0x20, -1, 0);
   TestSmiMul(masm, &exit, 0x30, 0, -1);
   TestSmiMul(masm, &exit, 0x40, -1, -1);
   TestSmiMul(masm, &exit, 0x50, 0x10000, 0x10000);
   TestSmiMul(masm, &exit, 0x60, 0x10000, 0xffff);
   TestSmiMul(masm, &exit, 0x70, 0x10000, 0xffff);
   TestSmiMul(masm, &exit, 0x80, Smi::kMaxValue, -1);
   TestSmiMul(masm, &exit, 0x90, Smi::kMaxValue, -2);
   TestSmiMul(masm, &exit, 0xa0, Smi::kMaxValue, 2);
   TestSmiMul(masm, &exit, 0xb0, (Smi::kMaxValue / 2), 2);
   TestSmiMul(masm, &exit, 0xc0, (Smi::kMaxValue / 2) + 1, 2);
   TestSmiMul(masm, &exit, 0xd0, (Smi::kMinValue / 2), 2);
   TestSmiMul(masm, &exit, 0xe0, (Smi::kMinValue / 2) - 1, 2);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 void TestSmiDiv(MacroAssembler* masm, Label* exit, int id, int x, int y) {
   bool division_by_zero = (y == 0);
   bool negative_zero = (x == 0 && y < 0);
 #ifdef V8_TARGET_ARCH_X64
   bool overflow = (x == Smi::kMinValue && y < 0);  // Safe approx. used.
 #else
   bool overflow = (x == Smi::kMinValue && y == -1);
 #endif
   bool fraction = !division_by_zero && !overflow && (x % y != 0);
   __ Move(r11, Smi::FromInt(x));
-  __ Move(r12, Smi::FromInt(y));
+  __ Move(r14, Smi::FromInt(y));
   if (!fraction && !overflow && !negative_zero && !division_by_zero) {
     // Division succeeds
     __ movq(rcx, r11);
-    __ movq(r15, Immediate(id));
+    __ movq(r12, Immediate(id));
     int result = x / y;
     __ Move(r8, Smi::FromInt(result));
-    __ SmiDiv(r9, rcx, r12, exit);
-    // Might have destroyed rcx and r12.
-    __ incq(r15);
+    __ SmiDiv(r9, rcx, r14, exit);
+    // Might have destroyed rcx and r14.
+    __ incq(r12);
     __ SmiCompare(r9, r8);
     __ j(not_equal, exit);
 
-    __ incq(r15);
+    __ incq(r12);
     __ movq(rcx, r11);
-    __ Move(r12, Smi::FromInt(y));
+    __ Move(r14, Smi::FromInt(y));
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
 
-    __ incq(r15);
-    __ SmiDiv(rcx, rcx, r12, exit);
+    __ incq(r12);
+    __ SmiDiv(rcx, rcx, r14, exit);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r8);
     __ j(not_equal, exit);
   } else {
     // Division fails.
-    __ movq(r15, Immediate(id + 8));
+    __ movq(r12, Immediate(id + 8));
 
     Label fail_ok, fail_ok2;
     __ movq(rcx, r11);
-    __ SmiDiv(r9, rcx, r12, &fail_ok);
+    __ SmiDiv(r9, rcx, r14, &fail_ok);
     __ jmp(exit);
     __ bind(&fail_ok);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
 
-    __ incq(r15);
-    __ SmiDiv(rcx, rcx, r12, &fail_ok2);
+    __ incq(r12);
+    __ SmiDiv(rcx, rcx, r14, &fail_ok2);
     __ jmp(exit);
     __ bind(&fail_ok2);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
   }
 }
 
 
 TEST(SmiDiv) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
+  __ push(r14);
   __ push(r12);
-  __ push(r15);
   TestSmiDiv(masm, &exit, 0x10, 1, 1);
   TestSmiDiv(masm, &exit, 0x20, 1, 0);
   TestSmiDiv(masm, &exit, 0x30, -1, 0);
   TestSmiDiv(masm, &exit, 0x40, 0, 1);
   TestSmiDiv(masm, &exit, 0x50, 0, -1);
   TestSmiDiv(masm, &exit, 0x60, 4, 2);
   TestSmiDiv(masm, &exit, 0x70, -4, 2);
   TestSmiDiv(masm, &exit, 0x80, 4, -2);
   TestSmiDiv(masm, &exit, 0x90, -4, -2);
   TestSmiDiv(masm, &exit, 0xa0, 3, 2);
   TestSmiDiv(masm, &exit, 0xb0, 3, 4);
   TestSmiDiv(masm, &exit, 0xc0, 1, Smi::kMaxValue);
   TestSmiDiv(masm, &exit, 0xd0, -1, Smi::kMaxValue);
   TestSmiDiv(masm, &exit, 0xe0, Smi::kMaxValue, 1);
   TestSmiDiv(masm, &exit, 0xf0, Smi::kMaxValue, Smi::kMaxValue);
   TestSmiDiv(masm, &exit, 0x100, Smi::kMaxValue, -Smi::kMaxValue);
   TestSmiDiv(masm, &exit, 0x110, Smi::kMaxValue, -1);
   TestSmiDiv(masm, &exit, 0x120, Smi::kMinValue, 1);
   TestSmiDiv(masm, &exit, 0x130, Smi::kMinValue, Smi::kMinValue);
   TestSmiDiv(masm, &exit, 0x140, Smi::kMinValue, -1);
 
-  __ xor_(r15, r15);  // Success.
+  __ xor_(r12, r12);  // Success.
   __ bind(&exit);
-  __ movq(rax, r15);
-  __ pop(r15);
+  __ movq(rax, r12);
   __ pop(r12);
+  __ pop(r14);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 void TestSmiMod(MacroAssembler* masm, Label* exit, int id, int x, int y) {
   bool division_by_zero = (y == 0);
   bool division_overflow = (x == Smi::kMinValue) && (y == -1);
   bool fraction = !division_by_zero && !division_overflow && ((x % y) != 0);
   bool negative_zero = (!fraction && x < 0);
   __ Move(rcx, Smi::FromInt(x));
   __ movq(r11, rcx);
-  __ Move(r12, Smi::FromInt(y));
+  __ Move(r14, Smi::FromInt(y));
   if (!division_overflow && !negative_zero && !division_by_zero) {
     // Modulo succeeds
-    __ movq(r15, Immediate(id));
+    __ movq(r12, Immediate(id));
     int result = x % y;
     __ Move(r8, Smi::FromInt(result));
-    __ SmiMod(r9, rcx, r12, exit);
+    __ SmiMod(r9, rcx, r14, exit);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(r9, r8);
     __ j(not_equal, exit);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
 
-    __ incq(r15);
-    __ SmiMod(rcx, rcx, r12, exit);
+    __ incq(r12);
+    __ SmiMod(rcx, rcx, r14, exit);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r8);
     __ j(not_equal, exit);
   } else {
     // Modulo fails.
-    __ movq(r15, Immediate(id + 8));
+    __ movq(r12, Immediate(id + 8));
 
     Label fail_ok, fail_ok2;
-    __ SmiMod(r9, rcx, r12, &fail_ok);
+    __ SmiMod(r9, rcx, r14, &fail_ok);
     __ jmp(exit);
     __ bind(&fail_ok);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
 
-    __ incq(r15);
-    __ SmiMod(rcx, rcx, r12, &fail_ok2);
+    __ incq(r12);
+    __ SmiMod(rcx, rcx, r14, &fail_ok2);
     __ jmp(exit);
     __ bind(&fail_ok2);
 
-    __ incq(r15);
+    __ incq(r12);
     __ SmiCompare(rcx, r11);
     __ j(not_equal, exit);
   }
 }
 
 
 TEST(SmiMod) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
+  __ push(r14);
   __ push(r12);
-  __ push(r15);
   TestSmiMod(masm, &exit, 0x10, 1, 1);
   TestSmiMod(masm, &exit, 0x20, 1, 0);
   TestSmiMod(masm, &exit, 0x30, -1, 0);
   TestSmiMod(masm, &exit, 0x40, 0, 1);
   TestSmiMod(masm, &exit, 0x50, 0, -1);
   TestSmiMod(masm, &exit, 0x60, 4, 2);
   TestSmiMod(masm, &exit, 0x70, -4, 2);
   TestSmiMod(masm, &exit, 0x80, 4, -2);
   TestSmiMod(masm, &exit, 0x90, -4, -2);
   TestSmiMod(masm, &exit, 0xa0, 3, 2);
   TestSmiMod(masm, &exit, 0xb0, 3, 4);
   TestSmiMod(masm, &exit, 0xc0, 1, Smi::kMaxValue);
   TestSmiMod(masm, &exit, 0xd0, -1, Smi::kMaxValue);
   TestSmiMod(masm, &exit, 0xe0, Smi::kMaxValue, 1);
   TestSmiMod(masm, &exit, 0xf0, Smi::kMaxValue, Smi::kMaxValue);
   TestSmiMod(masm, &exit, 0x100, Smi::kMaxValue, -Smi::kMaxValue);
   TestSmiMod(masm, &exit, 0x110, Smi::kMaxValue, -1);
   TestSmiMod(masm, &exit, 0x120, Smi::kMinValue, 1);
   TestSmiMod(masm, &exit, 0x130, Smi::kMinValue, Smi::kMinValue);
   TestSmiMod(masm, &exit, 0x140, Smi::kMinValue, -1);
 
-  __ xor_(r15, r15);  // Success.
+  __ xor_(r12, r12);  // Success.
   __ bind(&exit);
-  __ movq(rax, r15);
-  __ pop(r15);
+  __ movq(rax, r12);
   __ pop(r12);
+  __ pop(r14);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 34 matching lines @@
     __ SmiCompare(rcx, r8);
     __ j(not_equal, exit);
     __ incq(rax);
   }
 }
 
 TEST(SmiIndex) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
-      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
+      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 3,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiIndex(masm, &exit, 0x10, 0);
   TestSmiIndex(masm, &exit, 0x20, 1);
   TestSmiIndex(masm, &exit, 0x30, 100);
   TestSmiIndex(masm, &exit, 0x40, 1000);
   TestSmiIndex(masm, &exit, 0x50, Smi::kMaxValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 36 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);  // Avoid inline checks.
+  EntryCode(masm);
   Label exit;
 
   TestSelectNonSmi(masm, &exit, 0x10, 0, 0);
   TestSelectNonSmi(masm, &exit, 0x20, 0, 1);
   TestSelectNonSmi(masm, &exit, 0x30, 1, 0);
   TestSelectNonSmi(masm, &exit, 0x40, 0, -1);
   TestSelectNonSmi(masm, &exit, 0x50, -1, 0);
   TestSelectNonSmi(masm, &exit, 0x60, -1, -1);
   TestSelectNonSmi(masm, &exit, 0x70, 1, 1);
   TestSelectNonSmi(masm, &exit, 0x80, Smi::kMinValue, Smi::kMaxValue);
   TestSelectNonSmi(masm, &exit, 0x90, Smi::kMinValue, Smi::kMinValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 42 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiAnd(masm, &exit, 0x10, 0, 0);
   TestSmiAnd(masm, &exit, 0x20, 0, 1);
   TestSmiAnd(masm, &exit, 0x30, 1, 0);
   TestSmiAnd(masm, &exit, 0x40, 0, -1);
   TestSmiAnd(masm, &exit, 0x50, -1, 0);
   TestSmiAnd(masm, &exit, 0x60, -1, -1);
   TestSmiAnd(masm, &exit, 0x70, 1, 1);
   TestSmiAnd(masm, &exit, 0x80, Smi::kMinValue, Smi::kMaxValue);
   TestSmiAnd(masm, &exit, 0x90, Smi::kMinValue, Smi::kMinValue);
   TestSmiAnd(masm, &exit, 0xA0, Smi::kMinValue, -1);
   TestSmiAnd(masm, &exit, 0xB0, Smi::kMinValue, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 42 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiOr(masm, &exit, 0x10, 0, 0);
   TestSmiOr(masm, &exit, 0x20, 0, 1);
   TestSmiOr(masm, &exit, 0x30, 1, 0);
   TestSmiOr(masm, &exit, 0x40, 0, -1);
   TestSmiOr(masm, &exit, 0x50, -1, 0);
   TestSmiOr(masm, &exit, 0x60, -1, -1);
   TestSmiOr(masm, &exit, 0x70, 1, 1);
   TestSmiOr(masm, &exit, 0x80, Smi::kMinValue, Smi::kMaxValue);
   TestSmiOr(masm, &exit, 0x90, Smi::kMinValue, Smi::kMinValue);
   TestSmiOr(masm, &exit, 0xA0, Smi::kMinValue, -1);
   TestSmiOr(masm, &exit, 0xB0, 0x05555555, 0x01234567);
   TestSmiOr(masm, &exit, 0xC0, 0x05555555, 0x0fedcba9);
   TestSmiOr(masm, &exit, 0xD0, Smi::kMinValue, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 42 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiXor(masm, &exit, 0x10, 0, 0);
   TestSmiXor(masm, &exit, 0x20, 0, 1);
   TestSmiXor(masm, &exit, 0x30, 1, 0);
   TestSmiXor(masm, &exit, 0x40, 0, -1);
   TestSmiXor(masm, &exit, 0x50, -1, 0);
   TestSmiXor(masm, &exit, 0x60, -1, -1);
   TestSmiXor(masm, &exit, 0x70, 1, 1);
   TestSmiXor(masm, &exit, 0x80, Smi::kMinValue, Smi::kMaxValue);
   TestSmiXor(masm, &exit, 0x90, Smi::kMinValue, Smi::kMinValue);
   TestSmiXor(masm, &exit, 0xA0, Smi::kMinValue, -1);
   TestSmiXor(masm, &exit, 0xB0, 0x5555555, 0x01234567);
   TestSmiXor(masm, &exit, 0xC0, 0x5555555, 0x0fedcba9);
   TestSmiXor(masm, &exit, 0xD0, Smi::kMinValue, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 26 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiNot(masm, &exit, 0x10, 0);
   TestSmiNot(masm, &exit, 0x20, 1);
   TestSmiNot(masm, &exit, 0x30, -1);
   TestSmiNot(masm, &exit, 0x40, 127);
   TestSmiNot(masm, &exit, 0x50, 65535);
   TestSmiNot(masm, &exit, 0x60, Smi::kMinValue);
   TestSmiNot(masm, &exit, 0x70, Smi::kMaxValue);
   TestSmiNot(masm, &exit, 0x80, 0x05555555);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 51 matching lines @@
 
     __ incq(rax);
   }
 }
 
 
 TEST(SmiShiftLeft) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
-      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 3,
+      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 4,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiShiftLeft(masm, &exit, 0x10, 0);
   TestSmiShiftLeft(masm, &exit, 0x50, 1);
   TestSmiShiftLeft(masm, &exit, 0x90, 127);
   TestSmiShiftLeft(masm, &exit, 0xD0, 65535);
   TestSmiShiftLeft(masm, &exit, 0x110, Smi::kMaxValue);
   TestSmiShiftLeft(masm, &exit, 0x150, Smi::kMinValue);
   TestSmiShiftLeft(masm, &exit, 0x190, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 62 matching lines @@
       __ addq(rax, Immediate(3));
     }
   }
 }
 
 
 TEST(SmiShiftLogicalRight) {
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
-      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
+      static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 3,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiShiftLogicalRight(masm, &exit, 0x10, 0);
   TestSmiShiftLogicalRight(masm, &exit, 0x30, 1);
   TestSmiShiftLogicalRight(masm, &exit, 0x50, 127);
   TestSmiShiftLogicalRight(masm, &exit, 0x70, 65535);
   TestSmiShiftLogicalRight(masm, &exit, 0x90, Smi::kMaxValue);
   TestSmiShiftLogicalRight(masm, &exit, 0xB0, Smi::kMinValue);
   TestSmiShiftLogicalRight(masm, &exit, 0xD0, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 34 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestSmiShiftArithmeticRight(masm, &exit, 0x10, 0);
   TestSmiShiftArithmeticRight(masm, &exit, 0x20, 1);
   TestSmiShiftArithmeticRight(masm, &exit, 0x30, 127);
   TestSmiShiftArithmeticRight(masm, &exit, 0x40, 65535);
   TestSmiShiftArithmeticRight(masm, &exit, 0x50, Smi::kMaxValue);
   TestSmiShiftArithmeticRight(masm, &exit, 0x60, Smi::kMinValue);
   TestSmiShiftArithmeticRight(masm, &exit, 0x70, -1);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
@@ skipping 29 matching lines @@
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
+  EntryCode(masm);
   Label exit;
 
   TestPositiveSmiPowerUp(masm, &exit, 0x20, 0);
   TestPositiveSmiPowerUp(masm, &exit, 0x40, 1);
   TestPositiveSmiPowerUp(masm, &exit, 0x60, 127);
   TestPositiveSmiPowerUp(masm, &exit, 0x80, 128);
   TestPositiveSmiPowerUp(masm, &exit, 0xA0, 255);
   TestPositiveSmiPowerUp(masm, &exit, 0xC0, 256);
   TestPositiveSmiPowerUp(masm, &exit, 0x100, 65535);
   TestPositiveSmiPowerUp(masm, &exit, 0x120, 65536);
   TestPositiveSmiPowerUp(masm, &exit, 0x140, Smi::kMaxValue);
 
   __ xor_(rax, rax);  // Success.
   __ bind(&exit);
+  ExitCode(masm);
   __ ret(0);
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 TEST(OperandOffset) {
   int data[256];
   for (int i = 0; i < 256; i++) { data[i] = i * 0x01010101; }
 
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer =
       static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize * 2,
                                       &actual_size,
                                       true));
   CHECK(buffer);
   HandleScope handles;
   MacroAssembler assembler(buffer, static_cast<int>(actual_size));
 
   MacroAssembler* masm = &assembler;
   masm->set_allow_stub_calls(false);
   Label exit;
 
-  __ push(r12);
+  EntryCode(masm);
   __ push(r13);
+  __ push(r14);
   __ push(rbx);
   __ push(rbp);
   __ push(Immediate(0x100));  // <-- rbp
   __ movq(rbp, rsp);
   __ push(Immediate(0x101));
   __ push(Immediate(0x102));
   __ push(Immediate(0x103));
   __ push(Immediate(0x104));
   __ push(Immediate(0x105));  // <-- rbx
   __ push(Immediate(0x106));
   __ push(Immediate(0x107));
   __ push(Immediate(0x108));
   __ push(Immediate(0x109));  // <-- rsp
   // rbp = rsp[9]
   // r12 = rsp[3]
   // rbx = rsp[5]
   // r13 = rsp[7]
-  __ lea(r12, Operand(rsp, 3 * kPointerSize));
+  __ lea(r14, Operand(rsp, 3 * kPointerSize));
   __ lea(r13, Operand(rbp, -3 * kPointerSize));
   __ lea(rbx, Operand(rbp, -5 * kPointerSize));
   __ movl(rcx, Immediate(2));
   __ movq(r8, reinterpret_cast<uintptr_t>(&data[128]), RelocInfo::NONE);
   __ movl(rax, Immediate(1));
 
   Operand sp0 = Operand(rsp, 0);
 
   // Test 1.
   __ movl(rdx, sp0);  // Sanity check.
@@ skipping 282 matching lines @@
   __ j(not_equal, &exit);
   __ incq(rax);
 
   // Success.
 
   __ movl(rax, Immediate(0));
   __ bind(&exit);
   __ lea(rsp, Operand(rbp, kPointerSize));
   __ pop(rbp);
   __ pop(rbx);
+  __ pop(r14);
   __ pop(r13);
-  __ pop(r12);
+  ExitCode(masm);
   __ ret(0);
 
 
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 
 #undef __