Implements FPU compare and branching for MIPS simulator, assembler, disassembler.

runtime/vm/constants_mips.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_CONSTANTS_MIPS_H_
 #define VM_CONSTANTS_MIPS_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 231 matching lines @@
   kCop1FnShift = 0,
   kCop1FnBits = 6,
   kCop1SubShift = 21,
   kCop1SubBits = 5,
   kImmShift = 0,
   kImmBits = 16,
   kInstrShift = 0,
   kInstrBits = 26,
   kBreakCodeShift = 6,
   kBreakCodeBits = 20,
+  kFpuCCShift = 8,
+  kFpuCCBits = 3,
 
   kBranchOffsetMask = 0x0000ffff,
 };
 
 
 enum Opcode {
   SPECIAL = 0,
   REGIMM = 1,
   J = 2,
   JAL = 3,
@@ skipping 109 matching lines @@
   BGEZAL = 17,
   BLTZALL = 18,
   BGEZALL = 19,
   SYNCI = 31,
 };
 
 
 enum Cop1Function {
   COP1_ADD = 0,
   COP1_MOV = 6,
+  COP1_C_F = 0b110000,
+  COP1_C_UN = 0b110001,
+  COP1_C_EQ = 0b110010,
+  COP1_C_UEQ = 0b110011,
+  COP1_C_OLT = 0b110100,
+  COP1_C_ULT = 0b110101,
+  COP1_C_OLE = 0b110110,
+  COP1_C_ULE = 0b110111,
 };
 
 enum Cop1Sub {
   COP1_MF = 0,
   COP1_MT = 4,
+  COP1_BC = 8,
 };
 
 enum Format {
   FMT_S = 16,
   FMT_D = 17,
   FMT_W = 20,
   FMT_L = 21,
   FMT_PS = 22,
 };
 
@@ skipping 116 matching lines @@
   }
 
   inline bool HasFormat() const {
     return (OpcodeField() == COP1) && (Bit(25) == 1);
   }
 
   inline Format FormatField() const {
     return static_cast<Format>(Bits(kFmtShift, kFmtBits));
   }
 
+  inline int32_t FpuCCField() const {
+    return Bits(kFpuCCShift, kFpuCCBits);
+  }
+
   // Instructions are read out of a code stream. The only way to get a
   // reference to an instruction is to convert a pc. 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(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
 #if defined(DEBUG)
   inline void AssertIsImmInstr(Opcode op, Register rs, Register rt,
                               int32_t imm) {
     ASSERT((OpcodeField() == op) && (RsField() == rs) && (RtField() == rt) &&
            (SImmField() == imm));
   }
 
   inline void AssertIsSpecialInstr(SpecialFunction f, Register rs, Register rt,
                                    Register rd) {
     ASSERT((OpcodeField() == SPECIAL) && (FunctionField() == f) &&
            (RsField() == rs) && (RtField() == rt) &&
            (RdField() == rd));
   }
 #endif  // defined(DEBUG)
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_MIPS_H_