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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_COMPILER_UTILS_X86_CONSTANTS_X86_H_
     18 #define ART_COMPILER_UTILS_X86_CONSTANTS_X86_H_
     19 
     20 #include <iosfwd>
     21 
     22 #include "arch/x86/registers_x86.h"
     23 #include "base/logging.h"
     24 #include "base/macros.h"
     25 #include "globals.h"
     26 
     27 namespace art {
     28 namespace x86 {
     29 
     30 enum ByteRegister {
     31   AL = 0,
     32   CL = 1,
     33   DL = 2,
     34   BL = 3,
     35   AH = 4,
     36   CH = 5,
     37   DH = 6,
     38   BH = 7,
     39   kNoByteRegister = -1  // Signals an illegal register.
     40 };
     41 
     42 
     43 enum XmmRegister {
     44   XMM0 = 0,
     45   XMM1 = 1,
     46   XMM2 = 2,
     47   XMM3 = 3,
     48   XMM4 = 4,
     49   XMM5 = 5,
     50   XMM6 = 6,
     51   XMM7 = 7,
     52   kNumberOfXmmRegisters = 8,
     53   kNoXmmRegister = -1  // Signals an illegal register.
     54 };
     55 std::ostream& operator<<(std::ostream& os, const XmmRegister& reg);
     56 
     57 enum X87Register {
     58   ST0 = 0,
     59   ST1 = 1,
     60   ST2 = 2,
     61   ST3 = 3,
     62   ST4 = 4,
     63   ST5 = 5,
     64   ST6 = 6,
     65   ST7 = 7,
     66   kNumberOfX87Registers = 8,
     67   kNoX87Register = -1  // Signals an illegal register.
     68 };
     69 std::ostream& operator<<(std::ostream& os, const X87Register& reg);
     70 
     71 enum ScaleFactor {
     72   TIMES_1 = 0,
     73   TIMES_2 = 1,
     74   TIMES_4 = 2,
     75   TIMES_8 = 3
     76 };
     77 
     78 enum Condition {
     79   kOverflow     =  0,
     80   kNoOverflow   =  1,
     81   kBelow        =  2,
     82   kAboveEqual   =  3,
     83   kEqual        =  4,
     84   kNotEqual     =  5,
     85   kBelowEqual   =  6,
     86   kAbove        =  7,
     87   kSign         =  8,
     88   kNotSign      =  9,
     89   kParityEven   = 10,
     90   kParityOdd    = 11,
     91   kLess         = 12,
     92   kGreaterEqual = 13,
     93   kLessEqual    = 14,
     94   kGreater      = 15,
     95 
     96   kZero         = kEqual,
     97   kNotZero      = kNotEqual,
     98   kNegative     = kSign,
     99   kPositive     = kNotSign
    100 };
    101 
    102 
    103 class Instr {
    104  public:
    105   static const uint8_t kHltInstruction = 0xF4;
    106   // We prefer not to use the int3 instruction since it conflicts with gdb.
    107   static const uint8_t kBreakPointInstruction = kHltInstruction;
    108 
    109   bool IsBreakPoint() {
    110     return (*reinterpret_cast<const uint8_t*>(this)) == kBreakPointInstruction;
    111   }
    112 
    113   // Instructions are read out of a code stream. The only way to get a
    114   // reference to an instruction is to convert a pointer. There is no way
    115   // to allocate or create instances of class Instr.
    116   // Use the At(pc) function to create references to Instr.
    117   static Instr* At(uintptr_t pc) { return reinterpret_cast<Instr*>(pc); }
    118 
    119  private:
    120   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
    121 };
    122 
    123 }  // namespace x86
    124 }  // namespace art
    125 
    126 #endif  // ART_COMPILER_UTILS_X86_CONSTANTS_X86_H_
    127