text: // Copyright 2014 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include <vector>
  
  #include "src/v8.h"
  
  #include "src/interpreter/bytecodes.h"
  #include "test/unittests/test-utils.h"
  
  
  namespace v8 {
  namespace internal {
  namespace interpreter {
  
  TEST(OperandConversion, Registers) {
    for (int i = 0; i < 128; i++) {
      uint8_t operand_value = Register(i).ToOperand();
      Register r = Register::FromOperand(operand_value);
      CHECK_EQ(i, r.index());
    }
  }
  
  
  TEST(OperandConversion, Parameters) {
    int parameter_counts[] = {7, 13, 99};
  
    size_t count = sizeof(parameter_counts) / sizeof(parameter_counts[0]);
    for (size_t p = 0; p < count; p++) {
      int parameter_count = parameter_counts[p];
      for (int i = 0; i < parameter_count; i++) {
        Register r = Register::FromParameterIndex(i, parameter_count);
        uint8_t operand_value = r.ToOperand();
        Register s = Register::FromOperand(operand_value);
        CHECK_EQ(i, s.ToParameterIndex(parameter_count));
      }
    }
  }
  
  
  TEST(OperandConversion, RegistersParametersNoOverlap) {
    std::vector<uint8_t> operand_count(256);
  
    for (int i = 0; i <= Register::kMaxRegisterIndex; i++) {
      Register r = Register(i);
      uint8_t operand = r.ToOperand();
      operand_count[operand] += 1;
      CHECK_EQ(operand_count[operand], 1);
    }
  
    int parameter_count = Register::MaxParameterIndex() + 1;
    for (int i = 0; i < parameter_count; i++) {
      Register r = Register::FromParameterIndex(i, parameter_count);
      uint8_t operand = r.ToOperand();
      operand_count[operand] += 1;
      CHECK_EQ(operand_count[operand], 1);
    }
  }
  
  }  // namespace interpreter
  }  // namespace internal
  }  // namespace v8
  