MIPS: Implemented PC-relative instructions for R6.

src/mips/constants-mips.h

 // Copyright 2012 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.
 
 #ifndef  V8_MIPS_CONSTANTS_H_
 #define  V8_MIPS_CONSTANTS_H_
 #include "src/globals.h"
 // UNIMPLEMENTED_ macro for MIPS.
 #ifdef DEBUG
 #define UNIMPLEMENTED_MIPS()                                                  \
@@ skipping 224 matching lines @@
 
 // On MIPS Simulator breakpoints can have different codes:
 // - Breaks between 0 and kMaxWatchpointCode are treated as simple watchpoints,
 //   the simulator will run through them and print the registers.
 // - Breaks between kMaxWatchpointCode and kMaxStopCode are treated as stop()
 //   instructions (see Assembler::stop()).
 // - Breaks larger than kMaxStopCode are simple breaks, dropping you into the
 //   debugger.
 const uint32_t kMaxWatchpointCode = 31;
 const uint32_t kMaxStopCode = 127;
+const int32_t kMaxInt19 = 262143;
+const int32_t kMinInt19 = -262144;
 STATIC_ASSERT(kMaxWatchpointCode < kMaxStopCode);
 
 
 // ----- Fields offset and length.
 const int kOpcodeShift   = 26;
 const int kOpcodeBits    = 6;
 const int kRsShift       = 21;
 const int kRsBits        = 5;
 const int kRtShift       = 16;
 const int kRtBits        = 5;
 const int kRdShift       = 11;
 const int kRdBits        = 5;
 const int kSaShift       = 6;
 const int kSaBits        = 5;
 const int kFunctionShift = 0;
 const int kFunctionBits  = 6;
 const int kLuiShift      = 16;
+const int kBp2Shift = 6;
+const int kBp2Bits = 2;
 
 const int kImm16Shift = 0;
 const int kImm16Bits  = 16;
+const int kImm18Shift = 0;
+const int kImm18Bits = 18;
+const int kImm19Shift = 0;
+const int kImm19Bits = 19;
 const int kImm21Shift = 0;
 const int kImm21Bits  = 21;
 const int kImm26Shift = 0;
 const int kImm26Bits  = 26;
 const int kImm28Shift = 0;
 const int kImm28Bits  = 28;
 const int kImm32Shift = 0;
 const int kImm32Bits  = 32;
 
 // In branches and jumps immediate fields point to words, not bytes,
@@ skipping 12 matching lines @@
 const int kFCccBits      = 3;
 const int kFBccShift     = 18;
 const int kFBccBits      = 3;
 const int kFBtrueShift   = 16;
 const int kFBtrueBits    = 1;
 
 // ----- Miscellaneous useful masks.
 // Instruction bit masks.
 const int  kOpcodeMask   = ((1 << kOpcodeBits) - 1) << kOpcodeShift;
 const int  kImm16Mask    = ((1 << kImm16Bits) - 1) << kImm16Shift;
+const int kImm18Mask = ((1 << kImm18Bits) - 1) << kImm18Shift;
+const int kImm19Mask = ((1 << kImm19Bits) - 1) << kImm19Shift;
+const int kImm21Mask = ((1 << kImm21Bits) - 1) << kImm21Shift;
 const int  kImm26Mask    = ((1 << kImm26Bits) - 1) << kImm26Shift;
 const int  kImm28Mask    = ((1 << kImm28Bits) - 1) << kImm28Shift;
 const int  kRsFieldMask  = ((1 << kRsBits) - 1) << kRsShift;
 const int  kRtFieldMask  = ((1 << kRtBits) - 1) << kRtShift;
 const int  kRdFieldMask  = ((1 << kRdBits) - 1) << kRdShift;
 const int  kSaFieldMask  = ((1 << kSaBits) - 1) << kSaShift;
 const int  kFunctionFieldMask = ((1 << kFunctionBits) - 1) << kFunctionShift;
 // Misc masks.
 const int  kHiMask       =   0xffff << 16;
 const int  kLoMask       =   0xffff;
 const int  kSignMask     =   0x80000000;
 const int  kJumpAddrMask = (1 << (kImm26Bits + kImmFieldShift)) - 1;
 
 // ----- MIPS Opcodes and Function Fields.
 // We use this presentation to stay close to the table representation in
 // MIPS32 Architecture For Programmers, Volume II: The MIPS32 Instruction Set.
 enum Opcode {
-  SPECIAL   =   0 << kOpcodeShift,
-  REGIMM    =   1 << kOpcodeShift,
+  SPECIAL = 0 << kOpcodeShift,
+  REGIMM = 1 << kOpcodeShift,
 
-  J         =   ((0 << 3) + 2) << kOpcodeShift,
-  JAL       =   ((0 << 3) + 3) << kOpcodeShift,
-  BEQ       =   ((0 << 3) + 4) << kOpcodeShift,
-  BNE       =   ((0 << 3) + 5) << kOpcodeShift,
-  BLEZ      =   ((0 << 3) + 6) << kOpcodeShift,
-  BGTZ      =   ((0 << 3) + 7) << kOpcodeShift,
+  J = ((0 << 3) + 2) << kOpcodeShift,
+  JAL = ((0 << 3) + 3) << kOpcodeShift,
+  BEQ = ((0 << 3) + 4) << kOpcodeShift,
+  BNE = ((0 << 3) + 5) << kOpcodeShift,
+  BLEZ = ((0 << 3) + 6) << kOpcodeShift,
+  BGTZ = ((0 << 3) + 7) << kOpcodeShift,
 
-  ADDI      =   ((1 << 3) + 0) << kOpcodeShift,
-  ADDIU     =   ((1 << 3) + 1) << kOpcodeShift,
-  SLTI      =   ((1 << 3) + 2) << kOpcodeShift,
-  SLTIU     =   ((1 << 3) + 3) << kOpcodeShift,
-  ANDI      =   ((1 << 3) + 4) << kOpcodeShift,
-  ORI       =   ((1 << 3) + 5) << kOpcodeShift,
-  XORI      =   ((1 << 3) + 6) << kOpcodeShift,
-  LUI       =   ((1 << 3) + 7) << kOpcodeShift,  // LUI/AUI family.
+  ADDI = ((1 << 3) + 0) << kOpcodeShift,
+  ADDIU = ((1 << 3) + 1) << kOpcodeShift,
+  SLTI = ((1 << 3) + 2) << kOpcodeShift,
+  SLTIU = ((1 << 3) + 3) << kOpcodeShift,
+  ANDI = ((1 << 3) + 4) << kOpcodeShift,
+  ORI = ((1 << 3) + 5) << kOpcodeShift,
+  XORI = ((1 << 3) + 6) << kOpcodeShift,
+  LUI = ((1 << 3) + 7) << kOpcodeShift,  // LUI/AUI family.
 
-  BEQC      =   ((2 << 3) + 0) << kOpcodeShift,
-  COP1      =   ((2 << 3) + 1) << kOpcodeShift,  // Coprocessor 1 class.
-  BEQL      =   ((2 << 3) + 4) << kOpcodeShift,
-  BNEL      =   ((2 << 3) + 5) << kOpcodeShift,
-  BLEZL     =   ((2 << 3) + 6) << kOpcodeShift,
-  BGTZL     =   ((2 << 3) + 7) << kOpcodeShift,
+  BEQC = ((2 << 3) + 0) << kOpcodeShift,
+  COP1 = ((2 << 3) + 1) << kOpcodeShift,  // Coprocessor 1 class.
+  BEQL = ((2 << 3) + 4) << kOpcodeShift,
+  BNEL = ((2 << 3) + 5) << kOpcodeShift,
+  BLEZL = ((2 << 3) + 6) << kOpcodeShift,
+  BGTZL = ((2 << 3) + 7) << kOpcodeShift,
 
-  DADDI     =   ((3 << 3) + 0) << kOpcodeShift,  // This is also BNEC.
-  SPECIAL2  =   ((3 << 3) + 4) << kOpcodeShift,
-  SPECIAL3  =   ((3 << 3) + 7) << kOpcodeShift,
+  DADDI = ((3 << 3) + 0) << kOpcodeShift,  // This is also BNEC.
+  SPECIAL2 = ((3 << 3) + 4) << kOpcodeShift,
+  SPECIAL3 = ((3 << 3) + 7) << kOpcodeShift,
 
-  LB        =   ((4 << 3) + 0) << kOpcodeShift,
-  LH        =   ((4 << 3) + 1) << kOpcodeShift,
-  LWL       =   ((4 << 3) + 2) << kOpcodeShift,
-  LW        =   ((4 << 3) + 3) << kOpcodeShift,
-  LBU       =   ((4 << 3) + 4) << kOpcodeShift,
-  LHU       =   ((4 << 3) + 5) << kOpcodeShift,
-  LWR       =   ((4 << 3) + 6) << kOpcodeShift,
-  SB        =   ((5 << 3) + 0) << kOpcodeShift,
-  SH        =   ((5 << 3) + 1) << kOpcodeShift,
-  SWL       =   ((5 << 3) + 2) << kOpcodeShift,
-  SW        =   ((5 << 3) + 3) << kOpcodeShift,
-  SWR       =   ((5 << 3) + 6) << kOpcodeShift,
+  LB = ((4 << 3) + 0) << kOpcodeShift,
+  LH = ((4 << 3) + 1) << kOpcodeShift,
+  LWL = ((4 << 3) + 2) << kOpcodeShift,
+  LW = ((4 << 3) + 3) << kOpcodeShift,
+  LBU = ((4 << 3) + 4) << kOpcodeShift,
+  LHU = ((4 << 3) + 5) << kOpcodeShift,
+  LWR = ((4 << 3) + 6) << kOpcodeShift,
+  SB = ((5 << 3) + 0) << kOpcodeShift,
+  SH = ((5 << 3) + 1) << kOpcodeShift,
+  SWL = ((5 << 3) + 2) << kOpcodeShift,
+  SW = ((5 << 3) + 3) << kOpcodeShift,
+  SWR = ((5 << 3) + 6) << kOpcodeShift,
 
-  LWC1      =   ((6 << 3) + 1) << kOpcodeShift,
-  LDC1      =   ((6 << 3) + 5) << kOpcodeShift,
-  BEQZC     =   ((6 << 3) + 6) << kOpcodeShift,
+  LWC1 = ((6 << 3) + 1) << kOpcodeShift,
+  LDC1 = ((6 << 3) + 5) << kOpcodeShift,
+  POP66 = ((6 << 3) + 6) << kOpcodeShift,
 
-  PREF      =   ((6 << 3) + 3) << kOpcodeShift,
+  PREF = ((6 << 3) + 3) << kOpcodeShift,
 
-  SWC1      =   ((7 << 3) + 1) << kOpcodeShift,
-  SDC1      =   ((7 << 3) + 5) << kOpcodeShift,
-  BNEZC     =   ((7 << 3) + 6) << kOpcodeShift,
+  SWC1 = ((7 << 3) + 1) << kOpcodeShift,
+  PCREL = ((7 << 3) + 3) << kOpcodeShift,
+  SDC1 = ((7 << 3) + 5) << kOpcodeShift,
+  POP76 = ((7 << 3) + 6) << kOpcodeShift,
 
-  COP1X     =   ((1 << 4) + 3) << kOpcodeShift
+  COP1X = ((1 << 4) + 3) << kOpcodeShift
 };
 
 enum SecondaryField {
   // SPECIAL Encoding of Function Field.
   SLL = ((0 << 3) + 0),
   MOVCI = ((0 << 3) + 1),
   SRL = ((0 << 3) + 2),
   SRA = ((0 << 3) + 3),
   SLLV = ((0 << 3) + 4),
   SRLV = ((0 << 3) + 6),
@@ skipping 50 matching lines @@
   DIV_MOD_U = ((3 << 3) + 3),
 
   // SPECIAL2 Encoding of Function Field.
   MUL = ((0 << 3) + 2),
   CLZ = ((4 << 3) + 0),
   CLO = ((4 << 3) + 1),
 
   // SPECIAL3 Encoding of Function Field.
   EXT = ((0 << 3) + 0),
   INS = ((0 << 3) + 4),
-  BITSWAP = ((4 << 3) + 0),
+  BSHFL = ((4 << 3) + 0),
+
+  // SPECIAL3 Encoding of sa Field
+  BITSWAP = ((0 << 3) + 0),
+  ALIGN = ((0 << 3) + 2),
+  WSBH = ((0 << 3) + 2),
+  SEB = ((2 << 3) + 0),
+  SEH = ((3 << 3) + 0),
 
   // REGIMM  encoding of rt Field.
   BLTZ = ((0 << 3) + 0) << 16,
   BGEZ = ((0 << 3) + 1) << 16,
   BLTZAL = ((2 << 3) + 0) << 16,
   BGEZAL = ((2 << 3) + 1) << 16,
   BGEZALL = ((2 << 3) + 3) << 16,
 
   // COP1 Encoding of rs Field.
   MFC1 = ((0 << 3) + 0) << 21,
@@ skipping 115 matching lines @@
   SEL = ((2 << 3) + 0),
   MOVZ_C = ((2 << 3) + 2),
   MOVN_C = ((2 << 3) + 3),
   SELEQZ_C = ((2 << 3) + 4),  // COP1 on FPR registers.
   MOVF = ((2 << 3) + 1),      // Function field for MOVT.fmt and MOVF.fmt
   SELNEZ_C = ((2 << 3) + 7),  // COP1 on FPR registers.
   // COP1 Encoding of Function Field When rs=PS.
   // COP1X Encoding of Function Field.
   MADD_D = ((4 << 3) + 1),
 
+  // PCREL Encoding of rt field
+  ADDIUPC = ((0 << 2) + 0),
+  LWPC = ((0 << 2) + 1),
+  AUIPC = ((3 << 3) + 6),
+  ALUIPC = ((3 << 3) + 7),
+
+  // POP66 Encoding of rs field
+  JIC = ((0 << 5) + 0),
+
+  // POP76 Encoding of rs field
+  JIALC = ((0 << 5) + 0),
+
   NULLSF = 0
 };
 
 
 // ----- Emulated conditions.
 // On MIPS we use this enum to abstract from conditional branch instructions.
 // The 'U' prefix is used to specify unsigned comparisons.
 // Opposite conditions must be paired as odd/even numbers
 // because 'NegateCondition' function flips LSB to negate condition.
 enum Condition {
@@ skipping 290 matching lines @@
   }
 
   inline int FtValue() const {
     return Bits(kFtShift + kFtBits - 1, kFtShift);
   }
 
   inline int FrValue() const {
     return Bits(kFrShift + kFrBits -1, kFrShift);
   }
 
+  inline int Bp2Value() const {
+    DCHECK(InstructionType() == kRegisterType);
+    return Bits(kBp2Shift + kBp2Bits - 1, kBp2Shift);
+  }
+
   // Float Compare condition code instruction bits.
   inline int FCccValue() const {
     return Bits(kFCccShift + kFCccBits - 1, kFCccShift);
   }
 
   // Float Branch condition code instruction bits.
   inline int FBccValue() const {
     return Bits(kFBccShift + kFBccBits - 1, kFBccShift);
   }
 
@@ skipping 23 matching lines @@
            InstructionType() == kImmediateType);
     return InstructionBits() & kRtFieldMask;
   }
 
   inline int RdFieldRaw() const {
     DCHECK(InstructionType() == kRegisterType);
     return InstructionBits() & kRdFieldMask;
   }
 
   inline int SaFieldRaw() const {
-    DCHECK(InstructionType() == kRegisterType);
+    // DCHECK(InstructionType() == kRegisterType);
     return InstructionBits() & kSaFieldMask;
   }
 
   inline int FunctionFieldRaw() const {
     return InstructionBits() & kFunctionFieldMask;
   }
 
   // Get the secondary field according to the opcode.
   inline int SecondaryValue() const {
     Opcode op = OpcodeFieldRaw();
     switch (op) {
       case SPECIAL:
       case SPECIAL2:
         return FunctionValue();
       case COP1:
         return RsValue();
       case REGIMM:
         return RtValue();
       default:
         return NULLSF;
     }
   }
 
   inline int32_t Imm16Value() const {
     DCHECK(InstructionType() == kImmediateType);
     return Bits(kImm16Shift + kImm16Bits - 1, kImm16Shift);
   }
 
+  inline int32_t Imm18Value() const {
+    DCHECK(InstructionType() == kImmediateType);
+    return Bits(kImm18Shift + kImm18Bits - 1, kImm18Shift);
+  }
+
+  inline int32_t Imm19Value() const {
+    DCHECK(InstructionType() == kImmediateType);
+    return Bits(kImm19Shift + kImm19Bits - 1, kImm19Shift);
+  }
+
   inline int32_t Imm21Value() const {
     DCHECK(InstructionType() == kImmediateType);
     return Bits(kImm21Shift + kImm21Bits - 1, kImm21Shift);
   }
 
   inline int32_t Imm26Value() const {
     DCHECK(InstructionType() == kJumpType);
     return Bits(kImm26Shift + kImm26Bits - 1, kImm26Shift);
   }
 
@@ skipping 28 matching lines @@
 // JS argument slots size.
 const int kJSArgsSlotsSize = 0 * Instruction::kInstrSize;
 // Assembly builtins argument slots size.
 const int kBArgsSlotsSize = 0 * Instruction::kInstrSize;
 
 const int kBranchReturnOffset = 2 * Instruction::kInstrSize;
 
 } }   // namespace v8::internal
 
 #endif    // #ifndef V8_MIPS_CONSTANTS_H_