1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2007-2008 The Florida State University
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Stephen Hines
41 */
42#ifndef __ARCH_ARM_INSTS_STATICINST_HH__
43#define __ARCH_ARM_INSTS_STATICINST_HH__
44
45#include "base/trace.hh"
46#include "cpu/static_inst.hh"
47
48namespace ArmISA
49{
50class ArmStaticInst : public StaticInst
51{
52 protected:
53 int32_t shift_rm_imm(uint32_t base, uint32_t shamt,
54 uint32_t type, uint32_t cfval) const;
55 int32_t shift_rm_rs(uint32_t base, uint32_t shamt,
56 uint32_t type, uint32_t cfval) const;
57
58 bool shift_carry_imm(uint32_t base, uint32_t shamt,
59 uint32_t type, uint32_t cfval) const;
60 bool shift_carry_rs(uint32_t base, uint32_t shamt,
61 uint32_t type, uint32_t cfval) const;
62
63 template<int width>
64 static bool
65 saturateOp(int32_t &res, int64_t op1, int64_t op2, bool sub=false)
66 {
67 int64_t midRes = sub ? (op1 - op2) : (op1 + op2);
68 if (bits(midRes, width) != bits(midRes, width - 1)) {
69 if (midRes > 0)
70 res = (LL(1) << (width - 1)) - 1;
71 else
72 res = -(LL(1) << (width - 1));
73 return true;
74 } else {
75 res = midRes;
76 return false;
77 }
78 }
79
80 static bool
81 satInt(int32_t &res, int64_t op, int width)
82 {
83 width--;
84 if (op >= (LL(1) << width)) {
85 res = (LL(1) << width) - 1;
86 return true;
87 } else if (op < -(LL(1) << width)) {
88 res = -(LL(1) << width);
89 return true;
90 } else {
91 res = op;
92 return false;
93 }
94 }
95
96 template<int width>
97 static bool
98 uSaturateOp(uint32_t &res, int64_t op1, int64_t op2, bool sub=false)
99 {
100 int64_t midRes = sub ? (op1 - op2) : (op1 + op2);
101 if (midRes >= (LL(1) << width)) {
102 res = (LL(1) << width) - 1;
103 return true;
104 } else if (midRes < 0) {
105 res = 0;
106 return true;
107 } else {
108 res = midRes;
109 return false;
110 }
111 }
112
113 static bool
114 uSatInt(int32_t &res, int64_t op, int width)
115 {
116 if (op >= (LL(1) << width)) {
117 res = (LL(1) << width) - 1;
118 return true;
119 } else if (op < 0) {
120 res = 0;
121 return true;
122 } else {
123 res = op;
124 return false;
125 }
126 }
127
128 // Constructor
129 ArmStaticInst(const char *mnem, ExtMachInst _machInst,
130 OpClass __opClass)
131 : StaticInst(mnem, _machInst, __opClass)
132 {
133 }
134
135 /// Print a register name for disassembly given the unique
136 /// dependence tag number (FP or int).
137 void printReg(std::ostream &os, int reg) const;
138 void printMnemonic(std::ostream &os,
139 const std::string &suffix = "",
140 bool withPred = true) const;
141 void printMemSymbol(std::ostream &os, const SymbolTable *symtab,
142 const std::string &prefix, const Addr addr,
143 const std::string &suffix) const;
144 void printShiftOperand(std::ostream &os, IntRegIndex rm,
145 bool immShift, uint32_t shiftAmt,
146 IntRegIndex rs, ArmShiftType type) const;
147
148
149 void printDataInst(std::ostream &os, bool withImm) const;
150 void printDataInst(std::ostream &os, bool withImm, bool immShift, bool s,
151 IntRegIndex rd, IntRegIndex rn, IntRegIndex rm,
152 IntRegIndex rs, uint32_t shiftAmt, ArmShiftType type,
153 uint32_t imm) const;
154
155 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
156
157 static uint32_t
158 cpsrWriteByInstr(CPSR cpsr, uint32_t val,
| 1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2007-2008 The Florida State University
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Stephen Hines
41 */
42#ifndef __ARCH_ARM_INSTS_STATICINST_HH__
43#define __ARCH_ARM_INSTS_STATICINST_HH__
44
45#include "base/trace.hh"
46#include "cpu/static_inst.hh"
47
48namespace ArmISA
49{
50class ArmStaticInst : public StaticInst
51{
52 protected:
53 int32_t shift_rm_imm(uint32_t base, uint32_t shamt,
54 uint32_t type, uint32_t cfval) const;
55 int32_t shift_rm_rs(uint32_t base, uint32_t shamt,
56 uint32_t type, uint32_t cfval) const;
57
58 bool shift_carry_imm(uint32_t base, uint32_t shamt,
59 uint32_t type, uint32_t cfval) const;
60 bool shift_carry_rs(uint32_t base, uint32_t shamt,
61 uint32_t type, uint32_t cfval) const;
62
63 template<int width>
64 static bool
65 saturateOp(int32_t &res, int64_t op1, int64_t op2, bool sub=false)
66 {
67 int64_t midRes = sub ? (op1 - op2) : (op1 + op2);
68 if (bits(midRes, width) != bits(midRes, width - 1)) {
69 if (midRes > 0)
70 res = (LL(1) << (width - 1)) - 1;
71 else
72 res = -(LL(1) << (width - 1));
73 return true;
74 } else {
75 res = midRes;
76 return false;
77 }
78 }
79
80 static bool
81 satInt(int32_t &res, int64_t op, int width)
82 {
83 width--;
84 if (op >= (LL(1) << width)) {
85 res = (LL(1) << width) - 1;
86 return true;
87 } else if (op < -(LL(1) << width)) {
88 res = -(LL(1) << width);
89 return true;
90 } else {
91 res = op;
92 return false;
93 }
94 }
95
96 template<int width>
97 static bool
98 uSaturateOp(uint32_t &res, int64_t op1, int64_t op2, bool sub=false)
99 {
100 int64_t midRes = sub ? (op1 - op2) : (op1 + op2);
101 if (midRes >= (LL(1) << width)) {
102 res = (LL(1) << width) - 1;
103 return true;
104 } else if (midRes < 0) {
105 res = 0;
106 return true;
107 } else {
108 res = midRes;
109 return false;
110 }
111 }
112
113 static bool
114 uSatInt(int32_t &res, int64_t op, int width)
115 {
116 if (op >= (LL(1) << width)) {
117 res = (LL(1) << width) - 1;
118 return true;
119 } else if (op < 0) {
120 res = 0;
121 return true;
122 } else {
123 res = op;
124 return false;
125 }
126 }
127
128 // Constructor
129 ArmStaticInst(const char *mnem, ExtMachInst _machInst,
130 OpClass __opClass)
131 : StaticInst(mnem, _machInst, __opClass)
132 {
133 }
134
135 /// Print a register name for disassembly given the unique
136 /// dependence tag number (FP or int).
137 void printReg(std::ostream &os, int reg) const;
138 void printMnemonic(std::ostream &os,
139 const std::string &suffix = "",
140 bool withPred = true) const;
141 void printMemSymbol(std::ostream &os, const SymbolTable *symtab,
142 const std::string &prefix, const Addr addr,
143 const std::string &suffix) const;
144 void printShiftOperand(std::ostream &os, IntRegIndex rm,
145 bool immShift, uint32_t shiftAmt,
146 IntRegIndex rs, ArmShiftType type) const;
147
148
149 void printDataInst(std::ostream &os, bool withImm) const;
150 void printDataInst(std::ostream &os, bool withImm, bool immShift, bool s,
151 IntRegIndex rd, IntRegIndex rn, IntRegIndex rm,
152 IntRegIndex rs, uint32_t shiftAmt, ArmShiftType type,
153 uint32_t imm) const;
154
155 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
156
157 static uint32_t
158 cpsrWriteByInstr(CPSR cpsr, uint32_t val,
|
191 }
192
193 static uint32_t
194 spsrWriteByInstr(uint32_t spsr, uint32_t val,
195 uint8_t byteMask, bool affectState)
196 {
197 uint32_t bitMask = 0;
198
199 if (bits(byteMask, 3))
200 bitMask = bitMask | mask(31, 24);
201 if (bits(byteMask, 2))
202 bitMask = bitMask | mask(19, 16);
203 if (bits(byteMask, 1))
204 bitMask = bitMask | mask(15, 8);
205 if (bits(byteMask, 0))
206 bitMask = bitMask | mask(7, 0);
207
208 return ((spsr & ~bitMask) | (val & bitMask));
209 }
210
211 template<class XC>
212 static Addr
213 readPC(XC *xc)
214 {
215 Addr pc = xc->readPC();
216 Addr tBit = pc & (ULL(1) << PcTBitShift);
217 if (tBit)
218 return pc + 4;
219 else
220 return pc + 8;
221 }
222
223 // Perform an regular branch.
224 template<class XC>
225 static void
226 setNextPC(XC *xc, Addr val)
227 {
228 Addr npc = xc->readNextPC();
229 if (npc & (ULL(1) << PcTBitShift)) {
230 val &= ~mask(1);
231 } else {
232 val &= ~mask(2);
233 }
234 xc->setNextPC((npc & PcModeMask) |
235 (val & ~PcModeMask));
236 }
237
238 template<class T>
239 static T
240 cSwap(T val, bool big)
241 {
242 if (big) {
243 return gtobe(val);
244 } else {
245 return gtole(val);
246 }
247 }
248
249 // Perform an interworking branch.
250 template<class XC>
251 static void
252 setIWNextPC(XC *xc, Addr val)
253 {
254 Addr stateBits = xc->readPC() & PcModeMask;
255 Addr jBit = (ULL(1) << PcJBitShift);
256 Addr tBit = (ULL(1) << PcTBitShift);
257 bool thumbEE = (stateBits == (tBit | jBit));
258
259 Addr newPc = (val & ~PcModeMask);
260 if (thumbEE) {
261 if (bits(newPc, 0)) {
262 newPc = newPc & ~mask(1);
263 } else {
264 panic("Bad thumbEE interworking branch address %#x.\n", newPc);
265 }
266 } else {
267 if (bits(newPc, 0)) {
268 stateBits = tBit;
269 newPc = newPc & ~mask(1);
270 } else if (!bits(newPc, 1)) {
271 stateBits = 0;
272 } else {
273 warn("Bad interworking branch address %#x.\n", newPc);
274 }
275 }
276 newPc = newPc | stateBits;
277 xc->setNextPC(newPc);
278 }
279
280 // Perform an interworking branch in ARM mode, a regular branch
281 // otherwise.
282 template<class XC>
283 static void
284 setAIWNextPC(XC *xc, Addr val)
285 {
286 Addr stateBits = xc->readPC() & PcModeMask;
287 Addr jBit = (ULL(1) << PcJBitShift);
288 Addr tBit = (ULL(1) << PcTBitShift);
289 if (!jBit && !tBit) {
290 setIWNextPC(xc, val);
291 } else {
292 setNextPC(xc, val);
293 }
294 }
295};
296}
297
298#endif //__ARCH_ARM_INSTS_STATICINST_HH__
| 195 }
196
197 static uint32_t
198 spsrWriteByInstr(uint32_t spsr, uint32_t val,
199 uint8_t byteMask, bool affectState)
200 {
201 uint32_t bitMask = 0;
202
203 if (bits(byteMask, 3))
204 bitMask = bitMask | mask(31, 24);
205 if (bits(byteMask, 2))
206 bitMask = bitMask | mask(19, 16);
207 if (bits(byteMask, 1))
208 bitMask = bitMask | mask(15, 8);
209 if (bits(byteMask, 0))
210 bitMask = bitMask | mask(7, 0);
211
212 return ((spsr & ~bitMask) | (val & bitMask));
213 }
214
215 template<class XC>
216 static Addr
217 readPC(XC *xc)
218 {
219 Addr pc = xc->readPC();
220 Addr tBit = pc & (ULL(1) << PcTBitShift);
221 if (tBit)
222 return pc + 4;
223 else
224 return pc + 8;
225 }
226
227 // Perform an regular branch.
228 template<class XC>
229 static void
230 setNextPC(XC *xc, Addr val)
231 {
232 Addr npc = xc->readNextPC();
233 if (npc & (ULL(1) << PcTBitShift)) {
234 val &= ~mask(1);
235 } else {
236 val &= ~mask(2);
237 }
238 xc->setNextPC((npc & PcModeMask) |
239 (val & ~PcModeMask));
240 }
241
242 template<class T>
243 static T
244 cSwap(T val, bool big)
245 {
246 if (big) {
247 return gtobe(val);
248 } else {
249 return gtole(val);
250 }
251 }
252
253 // Perform an interworking branch.
254 template<class XC>
255 static void
256 setIWNextPC(XC *xc, Addr val)
257 {
258 Addr stateBits = xc->readPC() & PcModeMask;
259 Addr jBit = (ULL(1) << PcJBitShift);
260 Addr tBit = (ULL(1) << PcTBitShift);
261 bool thumbEE = (stateBits == (tBit | jBit));
262
263 Addr newPc = (val & ~PcModeMask);
264 if (thumbEE) {
265 if (bits(newPc, 0)) {
266 newPc = newPc & ~mask(1);
267 } else {
268 panic("Bad thumbEE interworking branch address %#x.\n", newPc);
269 }
270 } else {
271 if (bits(newPc, 0)) {
272 stateBits = tBit;
273 newPc = newPc & ~mask(1);
274 } else if (!bits(newPc, 1)) {
275 stateBits = 0;
276 } else {
277 warn("Bad interworking branch address %#x.\n", newPc);
278 }
279 }
280 newPc = newPc | stateBits;
281 xc->setNextPC(newPc);
282 }
283
284 // Perform an interworking branch in ARM mode, a regular branch
285 // otherwise.
286 template<class XC>
287 static void
288 setAIWNextPC(XC *xc, Addr val)
289 {
290 Addr stateBits = xc->readPC() & PcModeMask;
291 Addr jBit = (ULL(1) << PcJBitShift);
292 Addr tBit = (ULL(1) << PcTBitShift);
293 if (!jBit && !tBit) {
294 setIWNextPC(xc, val);
295 } else {
296 setNextPC(xc, val);
297 }
298 }
299};
300}
301
302#endif //__ARCH_ARM_INSTS_STATICINST_HH__
|