branch.isa (3056:f613791cfec0) branch.isa (3273:5aa5cc05fff9)
1// Copyright (c) 2006 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright

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75 class BranchNBits : public BranchDisp
76 {
77 protected:
78 // Constructor
79 BranchNBits(const char *mnem, MachInst _machInst,
80 OpClass __opClass) :
81 BranchDisp(mnem, _machInst, __opClass)
82 {
1// Copyright (c) 2006 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright

--- 66 unchanged lines hidden (view full) ---

75 class BranchNBits : public BranchDisp
76 {
77 protected:
78 // Constructor
79 BranchNBits(const char *mnem, MachInst _machInst,
80 OpClass __opClass) :
81 BranchDisp(mnem, _machInst, __opClass)
82 {
83 disp = sign_ext(_machInst << 2, bits + 2);
83 disp = sext<bits + 2>((_machInst & mask(bits)) << 2);
84 }
85 };
86
87 /**
88 * Base class for 16bit split displacements.
89 */
90 class BranchSplit : public BranchDisp
91 {
92 protected:
93 // Constructor
94 BranchSplit(const char *mnem, MachInst _machInst,
95 OpClass __opClass) :
96 BranchDisp(mnem, _machInst, __opClass)
97 {
84 }
85 };
86
87 /**
88 * Base class for 16bit split displacements.
89 */
90 class BranchSplit : public BranchDisp
91 {
92 protected:
93 // Constructor
94 BranchSplit(const char *mnem, MachInst _machInst,
95 OpClass __opClass) :
96 BranchDisp(mnem, _machInst, __opClass)
97 {
98 disp = sign_ext((D16HI << 16) | (D16LO << 2), 18);
98 disp = sext<18>((D16HI << 16) | (D16LO << 2));
99 }
100 };
101
102 /**
103 * Base class for branches that use an immediate and a register to
104 * compute their displacements.
105 */
106 class BranchImm13 : public Branch
107 {
108 protected:
109 // Constructor
110 BranchImm13(const char *mnem, MachInst _machInst, OpClass __opClass) :
99 }
100 };
101
102 /**
103 * Base class for branches that use an immediate and a register to
104 * compute their displacements.
105 */
106 class BranchImm13 : public Branch
107 {
108 protected:
109 // Constructor
110 BranchImm13(const char *mnem, MachInst _machInst, OpClass __opClass) :
111 Branch(mnem, _machInst, __opClass), imm(sign_ext(SIMM13, 13))
111 Branch(mnem, _machInst, __opClass), imm(sext<13>(SIMM13))
112 {
113 }
114
115 std::string generateDisassembly(Addr pc,
116 const SymbolTable *symtab) const;
117
118 int32_t imm;
119 };

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113 }
114
115 std::string generateDisassembly(Addr pc,
116 const SymbolTable *symtab) const;
117
118 int32_t imm;
119 };

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