Move backend specific files to separate directories.

src/constants-arm.h

-// Copyright 2008 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_CONSTANTS_ARM_H_
-#define V8_CONSTANTS_ARM_H_
-
-namespace assembler { namespace arm {
-
-// Defines constants and accessor classes to assemble, disassemble and
-// simulate ARM instructions.
-//
-// Section references in the code refer to the "ARM Architecture Reference
-// Manual" from July 2005 (available at http://www.arm.com/miscPDFs/14128.pdf)
-//
-// Constants for specific fields are defined in their respective named enums.
-// General constants are in an anonymous enum in class Instr.
-
-typedef unsigned char byte;
-
-// Values for the condition field as defined in section A3.2
-enum Condition {
-  no_condition = -1,
-  EQ =  0,  // equal
-  NE =  1,  // not equal
-  CS =  2,  // carry set/unsigned higher or same
-  CC =  3,  // carry clear/unsigned lower
-  MI =  4,  // minus/negative
-  PL =  5,  // plus/positive or zero
-  VS =  6,  // overflow
-  VC =  7,  // no overflow
-  HI =  8,  // unsigned higher
-  LS =  9,  // unsigned lower or same
-  GE = 10,  // signed greater than or equal
-  LT = 11,  // signed less than
-  GT = 12,  // signed greater than
-  LE = 13,  // signed less than or equal
-  AL = 14,  // always (unconditional)
-  special_condition = 15,  // special condition (refer to section A3.2.1)
-  max_condition = 16
-};
-
-
-// Opcodes for Data-processing instructions (instructions with a type 0 and 1)
-// as defined in section A3.4
-enum Opcode {
-  no_operand = -1,
-  AND =  0,  // Logical AND
-  EOR =  1,  // Logical Exclusive OR
-  SUB =  2,  // Subtract
-  RSB =  3,  // Reverse Subtract
-  ADD =  4,  // Add
-  ADC =  5,  // Add with Carry
-  SBC =  6,  // Subtract with Carry
-  RSC =  7,  // Reverse Subtract with Carry
-  TST =  8,  // Test
-  TEQ =  9,  // Test Equivalence
-  CMP = 10,  // Compare
-  CMN = 11,  // Compare Negated
-  ORR = 12,  // Logical (inclusive) OR
-  MOV = 13,  // Move
-  BIC = 14,  // Bit Clear
-  MVN = 15,  // Move Not
-  max_operand = 16
-};
-
-
-// Shifter types for Data-processing operands as defined in section A5.1.2.
-enum Shift {
-  no_shift = -1,
-  LSL = 0,  // Logical shift left
-  LSR = 1,  // Logical shift right
-  ASR = 2,  // Arithmetic shift right
-  ROR = 3,  // Rotate right
-  max_shift = 4
-};
-
-
-// Special Software Interrupt codes when used in the presence of the ARM
-// simulator.
-enum SoftwareInterruptCodes {
-  // transition to C code
-  call_rt_r5 = 0x10,
-  call_rt_r2 = 0x11,
-  // break point
-  break_point = 0x20,
-  // FP operations.  These simulate calling into C for a moment to do fp ops.
-  // They should trash all caller-save registers.
-  simulator_fp_add = 0x21,
-  simulator_fp_sub = 0x22,
-  simulator_fp_mul = 0x23
-};
-
-
-typedef int32_t instr_t;
-
-
-// The class Instr enables access to individual fields defined in the ARM
-// architecture instruction set encoding as described in figure A3-1.
-//
-// Example: Test whether the instruction at ptr does set the condition code
-// bits.
-//
-// bool InstructionSetsConditionCodes(byte* ptr) {
-//   Instr* instr = Instr::At(ptr);
-//   int type = instr->TypeField();
-//   return ((type == 0) || (type == 1)) && instr->HasS();
-// }
-//
-class Instr {
- public:
-  enum {
-    kInstrSize = 4,
-    kInstrSizeLog2 = 2,
-    kPCReadOffset = 8
-  };
-
-  // Get the raw instruction bits.
-  inline instr_t InstructionBits() const {
-    return *reinterpret_cast<const instr_t*>(this);
-  }
-
-  // Set the raw instruction bits to value.
-  inline void SetInstructionBits(instr_t value) {
-    *reinterpret_cast<instr_t*>(this) = value;
-  }
-
-  // Read one particular bit out of the instruction bits.
-  inline int Bit(int nr) const {
-    return (InstructionBits() >> nr) & 1;
-  }
-
-  // Read a bit field out of the instruction bits.
-  inline int Bits(int hi, int lo) const {
-    return (InstructionBits() >> lo) & ((2 << (hi - lo)) - 1);
-  }
-
-
-  // Accessors for the different named fields used in the ARM encoding.
-  // The naming of these accessor corresponds to figure A3-1.
-  // Generally applicable fields
-  inline Condition ConditionField() const {
-    return static_cast<Condition>(Bits(31, 28));
-  }
-  inline int TypeField() const { return Bits(27, 25); }
-
-  inline int RnField() const { return Bits(19, 16); }
-  inline int RdField() const { return Bits(15, 12); }
-
-  // Fields used in Data processing instructions
-  inline Opcode OpcodeField() const {
-    return static_cast<Opcode>(Bits(24, 21));
-  }
-  inline int SField() const { return Bit(20); }
-    // with register
-  inline int RmField() const { return Bits(3, 0); }
-  inline Shift ShiftField() const { return static_cast<Shift>(Bits(6, 5)); }
-  inline int RegShiftField() const { return Bit(4); }
-  inline int RsField() const { return Bits(11, 8); }
-  inline int ShiftAmountField() const { return Bits(11, 7); }
-    // with immediate
-  inline int RotateField() const { return Bits(11, 8); }
-  inline int Immed8Field() const { return Bits(7, 0); }
-
-  // Fields used in Load/Store instructions
-  inline int PUField() const { return Bits(24, 23); }
-  inline int  BField() const { return Bit(22); }
-  inline int  WField() const { return Bit(21); }
-  inline int  LField() const { return Bit(20); }
-    // with register uses same fields as Data processing instructions above
-    // with immediate
-  inline int Offset12Field() const { return Bits(11, 0); }
-    // multiple
-  inline int RlistField() const { return Bits(15, 0); }
-    // extra loads and stores
-  inline int SignField() const { return Bit(6); }
-  inline int HField() const { return Bit(5); }
-  inline int ImmedHField() const { return Bits(11, 8); }
-  inline int ImmedLField() const { return Bits(3, 0); }
-
-  // Fields used in Branch instructions
-  inline int LinkField() const { return Bit(24); }
-  inline int SImmed24Field() const { return ((InstructionBits() << 8) >> 8); }
-
-  // Fields used in Software interrupt instructions
-  inline SoftwareInterruptCodes SwiField() const {
-    return static_cast<SoftwareInterruptCodes>(Bits(23, 0));
-  }
-
-  // Test for special encodings of type 0 instructions (extra loads and stores,
-  // as well as multiplications).
-  inline bool IsSpecialType0() const { return (Bit(7) == 1) && (Bit(4) == 1); }
-
-  // Special accessors that test for existence of a value.
-  inline bool HasS()    const { return SField() == 1; }
-  inline bool HasB()    const { return BField() == 1; }
-  inline bool HasW()    const { return WField() == 1; }
-  inline bool HasL()    const { return LField() == 1; }
-  inline bool HasSign() const { return SignField() == 1; }
-  inline bool HasH()    const { return HField() == 1; }
-  inline bool HasLink() const { return LinkField() == 1; }
-
-  // Instructions are read of out a code stream. The only way to get a
-  // reference to an instruction is to convert a pointer. There is no way
-  // to allocate or create instances of class Instr.
-  // Use the At(pc) function to create references to Instr.
-  static Instr* At(byte* pc) { return reinterpret_cast<Instr*>(pc); }
-
- private:
-  // We need to prevent the creation of instances of class Instr.
-  DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
-};
-
-
-} }  // namespace assembler::arm
-
-#endif  // V8_CONSTANTS_ARM_H_