v8/test/cctest/test-assembler-ia32.cc

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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//
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#include <stdlib.h>

#include "v8.h"

#include "disassembler.h"
#include "factory.h"
#include "macro-assembler.h"
#include "platform.h"
#include "serialize.h"
#include "cctest.h"

using namespace v8::internal;


typedef int (*F0)();
typedef int (*F1)(int x);
typedef int (*F2)(int x, int y);


static v8::Persistent<v8::Context> env;


static void InitializeVM() {
  if (env.IsEmpty()) {
    env = v8::Context::New();
  }
}


#define __ assm.

TEST(AssemblerIa320) {
  InitializeVM();
  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);

  __ mov(eax, Operand(esp, 4));
  __ add(eax, Operand(esp, 8));
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Object* code = HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked();
  CHECK(code->IsCode());
#ifdef OBJECT_PRINT
  Code::cast(code)->Print();
#endif
  F2 f = FUNCTION_CAST<F2>(Code::cast(code)->entry());
  int res = f(3, 4);
  ::printf("f() = %d\n", res);
  CHECK_EQ(7, res);
}


TEST(AssemblerIa321) {
  InitializeVM();
  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);
  Label L, C;

  __ mov(edx, Operand(esp, 4));
  __ xor_(eax, eax);  // clear eax
  __ jmp(&C);

  __ bind(&L);
  __ add(eax, edx);
  __ sub(edx, Immediate(1));

  __ bind(&C);
  __ test(edx, edx);
  __ j(not_zero, &L);
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Object* code = HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked();
  CHECK(code->IsCode());
#ifdef OBJECT_PRINT
  Code::cast(code)->Print();
#endif
  F1 f = FUNCTION_CAST<F1>(Code::cast(code)->entry());
  int res = f(100);
  ::printf("f() = %d\n", res);
  CHECK_EQ(5050, res);
}


TEST(AssemblerIa322) {
  InitializeVM();
  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);
  Label L, C;

  __ mov(edx, Operand(esp, 4));
  __ mov(eax, 1);
  __ jmp(&C);

  __ bind(&L);
  __ imul(eax, edx);
  __ sub(edx, Immediate(1));

  __ bind(&C);
  __ test(edx, edx);
  __ j(not_zero, &L);
  __ ret(0);

  // some relocated stuff here, not executed
  __ mov(eax, FACTORY->true_value());
  __ jmp(NULL, RelocInfo::RUNTIME_ENTRY);

  CodeDesc desc;
  assm.GetCode(&desc);
  Object* code = HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked();
  CHECK(code->IsCode());
#ifdef OBJECT_PRINT
  Code::cast(code)->Print();
#endif
  F1 f = FUNCTION_CAST<F1>(Code::cast(code)->entry());
  int res = f(10);
  ::printf("f() = %d\n", res);
  CHECK_EQ(3628800, res);
}


typedef int (*F3)(float x);

TEST(AssemblerIa323) {
  InitializeVM();
  if (!CpuFeatures::IsSupported(SSE2)) return;

  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);

  CHECK(CpuFeatures::IsSupported(SSE2));
  { CpuFeatures::Scope fscope(SSE2);
    __ cvttss2si(eax, Operand(esp, 4));
    __ ret(0);
  }

  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  // don't print the code - our disassembler can't handle cvttss2si
  // instead print bytes
  Disassembler::Dump(stdout,
                     code->instruction_start(),
                     code->instruction_start() + code->instruction_size());
  F3 f = FUNCTION_CAST<F3>(code->entry());
  int res = f(static_cast<float>(-3.1415));
  ::printf("f() = %d\n", res);
  CHECK_EQ(-3, res);
}


typedef int (*F4)(double x);

TEST(AssemblerIa324) {
  InitializeVM();
  if (!CpuFeatures::IsSupported(SSE2)) return;

  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);

  CHECK(CpuFeatures::IsSupported(SSE2));
  CpuFeatures::Scope fscope(SSE2);
  __ cvttsd2si(eax, Operand(esp, 4));
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  // don't print the code - our disassembler can't handle cvttsd2si
  // instead print bytes
  Disassembler::Dump(stdout,
                     code->instruction_start(),
                     code->instruction_start() + code->instruction_size());
  F4 f = FUNCTION_CAST<F4>(code->entry());
  int res = f(2.718281828);
  ::printf("f() = %d\n", res);
  CHECK_EQ(2, res);
}


static int baz = 42;
TEST(AssemblerIa325) {
  InitializeVM();
  v8::HandleScope scope;

  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);

  __ mov(eax, Operand(reinterpret_cast<intptr_t>(&baz), RelocInfo::NONE));
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  F0 f = FUNCTION_CAST<F0>(code->entry());
  int res = f();
  CHECK_EQ(42, res);
}


typedef double (*F5)(double x, double y);

TEST(AssemblerIa326) {
  InitializeVM();
  if (!CpuFeatures::IsSupported(SSE2)) return;

  v8::HandleScope scope;
  CHECK(CpuFeatures::IsSupported(SSE2));
  CpuFeatures::Scope fscope(SSE2);
  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);

  __ movdbl(xmm0, Operand(esp, 1 * kPointerSize));
  __ movdbl(xmm1, Operand(esp, 3 * kPointerSize));
  __ addsd(xmm0, xmm1);
  __ mulsd(xmm0, xmm1);
  __ subsd(xmm0, xmm1);
  __ divsd(xmm0, xmm1);
  // Copy xmm0 to st(0) using eight bytes of stack.
  __ sub(esp, Immediate(8));
  __ movdbl(Operand(esp, 0), xmm0);
  __ fld_d(Operand(esp, 0));
  __ add(esp, Immediate(8));
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
#ifdef DEBUG
  ::printf("\n---\n");
  // don't print the code - our disassembler can't handle SSE instructions
  // instead print bytes
  Disassembler::Dump(stdout,
                     code->instruction_start(),
                     code->instruction_start() + code->instruction_size());
#endif
  F5 f = FUNCTION_CAST<F5>(code->entry());
  double res = f(2.2, 1.1);
  ::printf("f() = %f\n", res);
  CHECK(2.29 < res && res < 2.31);
}


typedef double (*F6)(int x);

TEST(AssemblerIa328) {
  InitializeVM();
  if (!CpuFeatures::IsSupported(SSE2)) return;

  v8::HandleScope scope;
  CHECK(CpuFeatures::IsSupported(SSE2));
  CpuFeatures::Scope fscope(SSE2);
  v8::internal::byte buffer[256];
  Assembler assm(Isolate::Current(), buffer, sizeof buffer);
  __ mov(eax, Operand(esp, 4));
  __ cvtsi2sd(xmm0, eax);
  // Copy xmm0 to st(0) using eight bytes of stack.
  __ sub(esp, Immediate(8));
  __ movdbl(Operand(esp, 0), xmm0);
  __ fld_d(Operand(esp, 0));
  __ add(esp, Immediate(8));
  __ ret(0);
  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  CHECK(code->IsCode());
#ifdef OBJECT_PRINT
  Code::cast(code)->Print();
#endif
  F6 f = FUNCTION_CAST<F6>(Code::cast(code)->entry());
  double res = f(12);

  ::printf("f() = %f\n", res);
  CHECK(11.99 < res && res < 12.001);
}


typedef int (*F7)(double x, double y);

TEST(AssemblerIa329) {
  InitializeVM();
  v8::HandleScope scope;
  v8::internal::byte buffer[256];
  MacroAssembler assm(Isolate::Current(), buffer, sizeof buffer);
  enum { kEqual = 0, kGreater = 1, kLess = 2, kNaN = 3, kUndefined = 4 };
  Label equal_l, less_l, greater_l, nan_l;
  __ fld_d(Operand(esp, 3 * kPointerSize));
  __ fld_d(Operand(esp, 1 * kPointerSize));
  __ FCmp();
  __ j(parity_even, &nan_l);
  __ j(equal, &equal_l);
  __ j(below, &less_l);
  __ j(above, &greater_l);

  __ mov(eax, kUndefined);
  __ ret(0);

  __ bind(&equal_l);
  __ mov(eax, kEqual);
  __ ret(0);

  __ bind(&greater_l);
  __ mov(eax, kGreater);
  __ ret(0);

  __ bind(&less_l);
  __ mov(eax, kLess);
  __ ret(0);

  __ bind(&nan_l);
  __ mov(eax, kNaN);
  __ ret(0);


  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  CHECK(code->IsCode());
#ifdef OBJECT_PRINT
  Code::cast(code)->Print();
#endif

  F7 f = FUNCTION_CAST<F7>(Code::cast(code)->entry());
  CHECK_EQ(kLess, f(1.1, 2.2));
  CHECK_EQ(kEqual, f(2.2, 2.2));
  CHECK_EQ(kGreater, f(3.3, 2.2));
  CHECK_EQ(kNaN, f(OS::nan_value(), 1.1));
}


TEST(AssemblerIa3210) {
  // Test chaining of label usages within instructions (issue 1644).
  InitializeVM();
  v8::HandleScope scope;
  Assembler assm(Isolate::Current(), NULL, 0);

  Label target;
  __ j(equal, &target);
  __ j(not_equal, &target);
  __ bind(&target);
  __ nop();
}


TEST(AssemblerMultiByteNop) {
  InitializeVM();
  v8::HandleScope scope;
  v8::internal::byte buffer[1024];
  Assembler assm(Isolate::Current(), buffer, sizeof(buffer));
  __ push(ebx);
  __ push(ecx);
  __ push(edx);
  __ push(edi);
  __ push(esi);
  __ mov(eax, 1);
  __ mov(ebx, 2);
  __ mov(ecx, 3);
  __ mov(edx, 4);
  __ mov(edi, 5);
  __ mov(esi, 6);
  for (int i = 0; i < 16; i++) {
    int before = assm.pc_offset();
    __ Nop(i);
    CHECK_EQ(assm.pc_offset() - before, i);
  }

  Label fail;
  __ cmp(eax, 1);
  __ j(not_equal, &fail);
  __ cmp(ebx, 2);
  __ j(not_equal, &fail);
  __ cmp(ecx, 3);
  __ j(not_equal, &fail);
  __ cmp(edx, 4);
  __ j(not_equal, &fail);
  __ cmp(edi, 5);
  __ j(not_equal, &fail);
  __ cmp(esi, 6);
  __ j(not_equal, &fail);
  __ mov(eax, 42);
  __ pop(esi);
  __ pop(edi);
  __ pop(edx);
  __ pop(ecx);
  __ pop(ebx);
  __ ret(0);
  __ bind(&fail);
  __ mov(eax, 13);
  __ pop(esi);
  __ pop(edi);
  __ pop(edx);
  __ pop(ecx);
  __ pop(ebx);
  __ ret(0);

  CodeDesc desc;
  assm.GetCode(&desc);
  Code* code = Code::cast(HEAP->CreateCode(
      desc,
      Code::ComputeFlags(Code::STUB),
      Handle<Object>(HEAP->undefined_value()))->ToObjectChecked());
  CHECK(code->IsCode());

  F0 f = FUNCTION_CAST<F0>(code->entry());
  int res = f();
  CHECK_EQ(42, res);
}




#undef __