basicmem.isa revision 3391:3b6298cab636 
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
9// notice, this list of conditions and the following disclaimer in the
10// documentation and/or other materials provided with the distribution;
11// neither the name of the copyright holders nor the names of its
12// contributors may be used to endorse or promote products derived from
13// this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26//
27// Authors: Ali Saidi
28//          Gabe Black
29
30////////////////////////////////////////////////////////////////////
31//
32// Mem instructions
33//
34
35output header {{
36        /**
37         * Base class for memory operations.
38         */
39        class Mem : public SparcStaticInst
40        {
41          protected:
42
43            // Constructor
44            Mem(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
45                SparcStaticInst(mnem, _machInst, __opClass)
46            {
47            }
48
49            std::string generateDisassembly(Addr pc,
50                    const SymbolTable *symtab) const;
51        };
52
53        /**
54         * Class for memory operations which use an immediate offset.
55         */
56        class MemImm : public Mem
57        {
58          protected:
59
60            // Constructor
61            MemImm(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
62                Mem(mnem, _machInst, __opClass), imm(sext<13>(SIMM13))
63            {}
64
65            std::string generateDisassembly(Addr pc,
66                    const SymbolTable *symtab) const;
67
68            const int32_t imm;
69        };
70}};
71
72output decoder {{
73        std::string Mem::generateDisassembly(Addr pc,
74                const SymbolTable *symtab) const
75        {
76            std::stringstream response;
77            bool load = flags[IsLoad];
78            bool save = flags[IsStore];
79
80            printMnemonic(response, mnemonic);
81            if(save)
82            {
83                printReg(response, _srcRegIdx[0]);
84                ccprintf(response, ", ");
85            }
86            ccprintf(response, "[ ");
87            printReg(response, _srcRegIdx[!save ? 0 : 1]);
88            ccprintf(response, " + ");
89            printReg(response, _srcRegIdx[!save ? 1 : 2]);
90            ccprintf(response, " ]");
91            if(load)
92            {
93                ccprintf(response, ", ");
94                printReg(response, _destRegIdx[0]);
95            }
96
97            return response.str();
98        }
99
100        std::string MemImm::generateDisassembly(Addr pc,
101                const SymbolTable *symtab) const
102        {
103            std::stringstream response;
104            bool load = flags[IsLoad];
105            bool save = flags[IsStore];
106
107            printMnemonic(response, mnemonic);
108            if(save)
109            {
110                printReg(response, _srcRegIdx[0]);
111                ccprintf(response, ", ");
112            }
113            ccprintf(response, "[ ");
114            printReg(response, _srcRegIdx[!save ? 0 : 1]);
115            if(imm >= 0)
116                ccprintf(response, " + 0x%x ]", imm);
117            else
118                ccprintf(response, " + -0x%x ]", -imm);
119            if(load)
120            {
121                ccprintf(response, ", ");
122                printReg(response, _destRegIdx[0]);
123            }
124
125            return response.str();
126        }
127}};
128
129def template MemDeclare {{
130        /**
131         * Static instruction class for "%(mnemonic)s".
132         */
133        class %(class_name)s : public %(base_class)s
134        {
135          public:
136
137            /// Constructor.
138            %(class_name)s(ExtMachInst machInst);
139
140            %(BasicExecDeclare)s
141
142            %(InitiateAccDeclare)s
143
144            %(CompleteAccDeclare)s
145        };
146}};
147
148let {{
149    def doMemFormat(code, execute, faultCode, name, Name, opt_flags):
150        addrCalcReg = 'EA = Rs1 + Rs2;'
151        addrCalcImm = 'EA = Rs1 + imm;'
152        iop = InstObjParams(name, Name, 'Mem', code,
153                opt_flags, {"fault_check": faultCode, "ea_code": addrCalcReg})
154        iop_imm = InstObjParams(name, Name + "Imm", 'MemImm', code,
155                opt_flags, {"fault_check": faultCode, "ea_code": addrCalcImm})
156        header_output = MemDeclare.subst(iop) + MemDeclare.subst(iop_imm)
157        decoder_output = BasicConstructor.subst(iop) + BasicConstructor.subst(iop_imm)
158        decode_block = ROrImmDecode.subst(iop)
159        exec_output = doSplitExecute(code, addrCalcReg, addrCalcImm, execute,
160                faultCode, name, name + "Imm", Name, Name + "Imm", opt_flags)
161        return (header_output, decoder_output, exec_output, decode_block)
162}};
163
164def format LoadAlt(code, *opt_flags) {{
165        (header_output,
166         decoder_output,
167         exec_output,
168         decode_block) = doMemFormat(code, LoadExecute,
169            AlternateAsiPrivFaultCheck, name, Name, opt_flags)
170}};
171
172def format StoreAlt(code, *opt_flags) {{
173        (header_output,
174         decoder_output,
175         exec_output,
176         decode_block) = doMemFormat(code, StoreExecute,
177            AlternateAsiPrivFaultCheck, name, Name, opt_flags)
178}};
179
180def format Load(code, *opt_flags) {{
181        (header_output,
182         decoder_output,
183         exec_output,
184         decode_block) = doMemFormat(code,
185             LoadExecute, '', name, Name, opt_flags)
186}};
187
188def format Store(code, *opt_flags) {{
189        (header_output,
190         decoder_output,
191         exec_output,
192         decode_block) = doMemFormat(code,
193             StoreExecute, '', name, Name, opt_flags)
194}};
195