1    :  // Copyright 2013 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/assm/register.h"
  16    :  
  17    :  #include "gtest/gtest.h"
  18    :  
  19    :  namespace assm {
  20    :  
  21  E :  TEST(RegisterTest, AllViewsOccupySameMemory) {
  22    :    // We expect the by-type arrays to be slices of the full register array.
  23  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&kRegisters8[0]),
  24  E :              &kRegisters[kRegister8Min]);
  25  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&kRegisters16[0]),
  26  E :              &kRegisters[kRegister16Min]);
  27  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&kRegisters32[0]),
  28  E :              &kRegisters[kRegister32Min]);
  29    :  
  30    :    // We expect the individual registers to be members of the full register
  31    :    // array.
  32  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&al), &kRegisters[kRegisterAl]);
  33  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&ch), &kRegisters[kRegisterCh]);
  34    :  
  35  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&dx), &kRegisters[kRegisterDx]);
  36  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&sp), &kRegisters[kRegisterSp]);
  37    :  
  38  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&ebx), &kRegisters[kRegisterEbx]);
  39  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&ebp), &kRegisters[kRegisterEbp]);
  40  E :  }
  41    :  
  42  E :  TEST(RegisterTest, Accessors) {
  43  E :    EXPECT_EQ(kRegisterEax, eax.id());
  44  E :    EXPECT_EQ(kSize32Bit, eax.size());
  45  E :    EXPECT_EQ(0, eax.code());
  46  E :  }
  47    :  
  48  E :  TEST(RegisterTest, Get) {
  49  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&ch),
  50  E :              &Register::Get(kRegisterCh));
  51  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&bx),
  52  E :              &Register::Get(kRegisterBx));
  53  E :    EXPECT_EQ(reinterpret_cast<const Register*>(&eax),
  54  E :              &Register::Get(kRegisterEax));
  55  E :  }
  56    :  
  57  E :  TEST(RegisterTest, Comparison) {
  58  E :    EXPECT_TRUE(dh == dh);
  59  E :    EXPECT_TRUE(sp == sp);
  60  E :    EXPECT_TRUE(eax == eax);
  61    :  
  62  E :    EXPECT_FALSE(al == ax);
  63  E :    EXPECT_FALSE(al == eax);
  64  E :    EXPECT_FALSE(ax == eax);
  65    :  
  66  E :    EXPECT_TRUE(al != ax);
  67  E :    EXPECT_TRUE(al != eax);
  68  E :    EXPECT_TRUE(ax != eax);
  69    :  
  70  E :    EXPECT_FALSE(dh != dh);
  71  E :    EXPECT_FALSE(sp != sp);
  72  E :    EXPECT_FALSE(eax != eax);
  73  E :  }
  74    :  
  75    :  }  // namespace assm