misc.isa revision 7251 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2010 ARM Limited
4// All rights reserved
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating
9// to a hardware implementation of the functionality of the software
10// licensed hereunder.  You may use the software subject to the license
11// terms below provided that you ensure that this notice is replicated
12// unmodified and in its entirety in all distributions of the software,
13// modified or unmodified, in source code or in binary form.
14//
15// Redistribution and use in source and binary forms, with or without
16// modification, are permitted provided that the following conditions are
17// met: redistributions of source code must retain the above copyright
18// notice, this list of conditions and the following disclaimer;
19// redistributions in binary form must reproduce the above copyright
20// notice, this list of conditions and the following disclaimer in the
21// documentation and/or other materials provided with the distribution;
22// neither the name of the copyright holders nor the names of its
23// contributors may be used to endorse or promote products derived from
24// this software without specific prior written permission.
25//
26// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37//
38// Authors: Gabe Black
39
40let {{
41
42    svcCode = '''
43#if FULL_SYSTEM
44    fault = new SupervisorCall;
45#else
46    fault = new SupervisorCall(machInst);
47#endif
48    '''
49
50    svcIop = InstObjParams("svc", "Svc", "PredOp",
51                           { "code": svcCode,
52                             "predicate_test": predicateTest }, ["IsSyscall"])
53    header_output = BasicDeclare.subst(svcIop)
54    decoder_output = BasicConstructor.subst(svcIop)
55    exec_output = PredOpExecute.subst(svcIop)
56
57}};
58
59let {{
60
61    header_output = decoder_output = exec_output = ""
62
63    mrsCpsrCode = "Dest = (Cpsr | CondCodes) & 0xF8FF03DF"
64    mrsCpsrIop = InstObjParams("mrs", "MrsCpsr", "MrsOp",
65                               { "code": mrsCpsrCode,
66                                 "predicate_test": predicateTest }, [])
67    header_output += MrsDeclare.subst(mrsCpsrIop)
68    decoder_output += MrsConstructor.subst(mrsCpsrIop)
69    exec_output += PredOpExecute.subst(mrsCpsrIop)
70
71    mrsSpsrCode = "Dest = Spsr"
72    mrsSpsrIop = InstObjParams("mrs", "MrsSpsr", "MrsOp",
73                               { "code": mrsSpsrCode,
74                                 "predicate_test": predicateTest }, [])
75    header_output += MrsDeclare.subst(mrsSpsrIop)
76    decoder_output += MrsConstructor.subst(mrsSpsrIop)
77    exec_output += PredOpExecute.subst(mrsSpsrIop)
78
79    msrCpsrRegCode = '''
80        uint32_t newCpsr =
81            cpsrWriteByInstr(Cpsr | CondCodes, Op1, byteMask, false);
82        Cpsr = ~CondCodesMask & newCpsr;
83        CondCodes = CondCodesMask & newCpsr;
84    '''
85    msrCpsrRegIop = InstObjParams("msr", "MsrCpsrReg", "MsrRegOp",
86                                  { "code": msrCpsrRegCode,
87                                    "predicate_test": predicateTest }, [])
88    header_output += MsrRegDeclare.subst(msrCpsrRegIop)
89    decoder_output += MsrRegConstructor.subst(msrCpsrRegIop)
90    exec_output += PredOpExecute.subst(msrCpsrRegIop)
91
92    msrSpsrRegCode = "Spsr = spsrWriteByInstr(Spsr, Op1, byteMask, false);"
93    msrSpsrRegIop = InstObjParams("msr", "MsrSpsrReg", "MsrRegOp",
94                                  { "code": msrSpsrRegCode,
95                                    "predicate_test": predicateTest }, [])
96    header_output += MsrRegDeclare.subst(msrSpsrRegIop)
97    decoder_output += MsrRegConstructor.subst(msrSpsrRegIop)
98    exec_output += PredOpExecute.subst(msrSpsrRegIop)
99
100    msrCpsrImmCode = '''
101        uint32_t newCpsr =
102            cpsrWriteByInstr(Cpsr | CondCodes, imm, byteMask, false);
103        Cpsr = ~CondCodesMask & newCpsr;
104        CondCodes = CondCodesMask & newCpsr;
105    '''
106    msrCpsrImmIop = InstObjParams("msr", "MsrCpsrImm", "MsrImmOp",
107                                  { "code": msrCpsrImmCode,
108                                    "predicate_test": predicateTest }, [])
109    header_output += MsrImmDeclare.subst(msrCpsrImmIop)
110    decoder_output += MsrImmConstructor.subst(msrCpsrImmIop)
111    exec_output += PredOpExecute.subst(msrCpsrImmIop)
112
113    msrSpsrImmCode = "Spsr = spsrWriteByInstr(Spsr, imm, byteMask, false);"
114    msrSpsrImmIop = InstObjParams("msr", "MsrSpsrImm", "MsrImmOp",
115                                  { "code": msrSpsrImmCode,
116                                    "predicate_test": predicateTest }, [])
117    header_output += MsrImmDeclare.subst(msrSpsrImmIop)
118    decoder_output += MsrImmConstructor.subst(msrSpsrImmIop)
119    exec_output += PredOpExecute.subst(msrSpsrImmIop)
120
121    revCode = '''
122    uint32_t val = Op1;
123    Dest = swap_byte(val);
124    '''
125    revIop = InstObjParams("rev", "Rev", "RevOp",
126                           { "code": revCode,
127                             "predicate_test": predicateTest }, [])
128    header_output += RevOpDeclare.subst(revIop)
129    decoder_output += RevOpConstructor.subst(revIop)
130    exec_output += PredOpExecute.subst(revIop)
131
132    rev16Code = '''
133    uint32_t val = Op1;
134    Dest = (bits(val, 15, 8) << 0) |
135           (bits(val, 7, 0) << 8) |
136           (bits(val, 31, 24) << 16) |
137           (bits(val, 23, 16) << 24);
138    '''
139    rev16Iop = InstObjParams("rev16", "Rev16", "RevOp",
140                             { "code": rev16Code,
141                               "predicate_test": predicateTest }, [])
142    header_output += RevOpDeclare.subst(rev16Iop)
143    decoder_output += RevOpConstructor.subst(rev16Iop)
144    exec_output += PredOpExecute.subst(rev16Iop)
145
146    revshCode = '''
147    uint16_t val = Op1;
148    Dest = sext<16>(swap_byte(val));
149    '''
150    revshIop = InstObjParams("revsh", "Revsh", "RevOp",
151                             { "code": revshCode,
152                               "predicate_test": predicateTest }, [])
153    header_output += RevOpDeclare.subst(revshIop)
154    decoder_output += RevOpConstructor.subst(revshIop)
155    exec_output += PredOpExecute.subst(revshIop)
156
157    rbitCode = '''
158    uint8_t *opBytes = (uint8_t *)&Op1;
159    uint32_t resTemp;
160    uint8_t *destBytes = (uint8_t *)&resTemp;
161    // This reverses the bytes and bits of the input, or so says the
162    // internet.
163    for (int i = 0; i < 4; i++) {
164        uint32_t temp = opBytes[i];
165        temp = (temp * 0x0802 & 0x22110) | (temp * 0x8020 & 0x88440);
166        destBytes[3 - i] = (temp * 0x10101) >> 16;
167    }
168    Dest = resTemp;
169    '''
170    rbitIop = InstObjParams("rbit", "Rbit", "RevOp",
171                            { "code": rbitCode,
172                              "predicate_test": predicateTest }, [])
173    header_output += RevOpDeclare.subst(rbitIop)
174    decoder_output += RevOpConstructor.subst(rbitIop)
175    exec_output += PredOpExecute.subst(rbitIop)
176
177    clzCode = '''
178        Dest = (Op1 == 0) ? 32 : (31 - findMsbSet(Op1));
179    '''
180    clzIop = InstObjParams("clz", "ClzInst", "RevOp",
181                           { "code": clzCode,
182                             "predicate_test": predicateTest }, [])
183    header_output += RevOpDeclare.subst(clzIop)
184    decoder_output += RevOpConstructor.subst(clzIop)
185    exec_output += PredOpExecute.subst(clzIop)
186
187    ssatCode = '''
188        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
189        int32_t res;
190        if (satInt(res, operand, imm))
191            CondCodes = CondCodes | (1 << 27);
192        else
193            CondCodes = CondCodes;
194        Dest = res;
195    '''
196    ssatIop = InstObjParams("ssat", "Ssat", "RegImmRegShiftOp",
197                            { "code": ssatCode,
198                              "predicate_test": predicateTest }, [])
199    header_output += RegImmRegShiftOpDeclare.subst(ssatIop)
200    decoder_output += RegImmRegShiftOpConstructor.subst(ssatIop)
201    exec_output += PredOpExecute.subst(ssatIop)
202
203    usatCode = '''
204        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
205        int32_t res;
206        if (uSatInt(res, operand, imm))
207            CondCodes = CondCodes | (1 << 27);
208        else
209            CondCodes = CondCodes;
210        Dest = res;
211    '''
212    usatIop = InstObjParams("usat", "Usat", "RegImmRegShiftOp",
213                            { "code": usatCode,
214                              "predicate_test": predicateTest }, [])
215    header_output += RegImmRegShiftOpDeclare.subst(usatIop)
216    decoder_output += RegImmRegShiftOpConstructor.subst(usatIop)
217    exec_output += PredOpExecute.subst(usatIop)
218
219    ssat16Code = '''
220        int32_t res;
221        uint32_t resTemp = 0;
222        CondCodes = CondCodes;
223        int32_t argLow = sext<16>(bits(Op1, 15, 0));
224        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
225        if (satInt(res, argLow, imm))
226            CondCodes = CondCodes | (1 << 27);
227        replaceBits(resTemp, 15, 0, res);
228        if (satInt(res, argHigh, imm))
229            CondCodes = CondCodes | (1 << 27);
230        replaceBits(resTemp, 31, 16, res);
231        Dest = resTemp;
232    '''
233    ssat16Iop = InstObjParams("ssat16", "Ssat16", "RegImmRegOp",
234                              { "code": ssat16Code,
235                                "predicate_test": predicateTest }, [])
236    header_output += RegImmRegOpDeclare.subst(ssat16Iop)
237    decoder_output += RegImmRegOpConstructor.subst(ssat16Iop)
238    exec_output += PredOpExecute.subst(ssat16Iop)
239
240    usat16Code = '''
241        int32_t res;
242        uint32_t resTemp = 0;
243        CondCodes = CondCodes;
244        int32_t argLow = sext<16>(bits(Op1, 15, 0));
245        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
246        if (uSatInt(res, argLow, imm))
247            CondCodes = CondCodes | (1 << 27);
248        replaceBits(resTemp, 15, 0, res);
249        if (uSatInt(res, argHigh, imm))
250            CondCodes = CondCodes | (1 << 27);
251        replaceBits(resTemp, 31, 16, res);
252        Dest = resTemp;
253    '''
254    usat16Iop = InstObjParams("usat16", "Usat16", "RegImmRegOp",
255                              { "code": usat16Code,
256                                "predicate_test": predicateTest }, [])
257    header_output += RegImmRegOpDeclare.subst(usat16Iop)
258    decoder_output += RegImmRegOpConstructor.subst(usat16Iop)
259    exec_output += PredOpExecute.subst(usat16Iop)
260
261    sxtbIop = InstObjParams("sxtb", "Sxtb", "RegImmRegOp",
262                            { "code":
263                              "Dest = sext<8>((uint8_t)(Op1.ud >> imm));",
264                              "predicate_test": predicateTest }, [])
265    header_output += RegImmRegOpDeclare.subst(sxtbIop)
266    decoder_output += RegImmRegOpConstructor.subst(sxtbIop)
267    exec_output += PredOpExecute.subst(sxtbIop)
268
269    sxtabIop = InstObjParams("sxtab", "Sxtab", "RegRegRegImmOp",
270                             { "code":
271                               '''
272                                   Dest = sext<8>((uint8_t)(Op2.ud >> imm)) +
273                                          Op1;
274                               ''',
275                               "predicate_test": predicateTest }, [])
276    header_output += RegRegRegImmOpDeclare.subst(sxtabIop)
277    decoder_output += RegRegRegImmOpConstructor.subst(sxtabIop)
278    exec_output += PredOpExecute.subst(sxtabIop)
279
280    sxtb16Code = '''
281    uint32_t resTemp = 0;
282    replaceBits(resTemp, 15, 0, sext<8>(bits(Op1, imm + 7, imm)));
283    replaceBits(resTemp, 31, 16,
284                sext<8>(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
285    Dest = resTemp;
286    '''
287    sxtb16Iop = InstObjParams("sxtb16", "Sxtb16", "RegImmRegOp",
288                              { "code": sxtb16Code,
289                                "predicate_test": predicateTest }, [])
290    header_output += RegImmRegOpDeclare.subst(sxtb16Iop)
291    decoder_output += RegImmRegOpConstructor.subst(sxtb16Iop)
292    exec_output += PredOpExecute.subst(sxtb16Iop)
293
294    sxtab16Code = '''
295    uint32_t resTemp = 0;
296    replaceBits(resTemp, 15, 0, sext<8>(bits(Op2, imm + 7, imm)) +
297                                        bits(Op1, 15, 0));
298    replaceBits(resTemp, 31, 16,
299                sext<8>(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
300                bits(Op1, 31, 16));
301    Dest = resTemp;
302    '''
303    sxtab16Iop = InstObjParams("sxtab16", "Sxtab16", "RegRegRegImmOp",
304                               { "code": sxtab16Code,
305                                 "predicate_test": predicateTest }, [])
306    header_output += RegRegRegImmOpDeclare.subst(sxtab16Iop)
307    decoder_output += RegRegRegImmOpConstructor.subst(sxtab16Iop)
308    exec_output += PredOpExecute.subst(sxtab16Iop)
309
310    sxthCode = '''
311    uint64_t rotated = (uint32_t)Op1;
312    rotated = (rotated | (rotated << 32)) >> imm;
313    Dest = sext<16>((uint16_t)rotated);
314    '''
315    sxthIop = InstObjParams("sxth", "Sxth", "RegImmRegOp",
316                              { "code": sxthCode,
317                                "predicate_test": predicateTest }, [])
318    header_output += RegImmRegOpDeclare.subst(sxthIop)
319    decoder_output += RegImmRegOpConstructor.subst(sxthIop)
320    exec_output += PredOpExecute.subst(sxthIop)
321
322    sxtahCode = '''
323    uint64_t rotated = (uint32_t)Op2;
324    rotated = (rotated | (rotated << 32)) >> imm;
325    Dest = sext<16>((uint16_t)rotated) + Op1;
326    '''
327    sxtahIop = InstObjParams("sxtah", "Sxtah", "RegRegRegImmOp",
328                             { "code": sxtahCode,
329                               "predicate_test": predicateTest }, [])
330    header_output += RegRegRegImmOpDeclare.subst(sxtahIop)
331    decoder_output += RegRegRegImmOpConstructor.subst(sxtahIop)
332    exec_output += PredOpExecute.subst(sxtahIop)
333
334    uxtbIop = InstObjParams("uxtb", "Uxtb", "RegImmRegOp",
335                            { "code": "Dest = (uint8_t)(Op1.ud >> imm);",
336                              "predicate_test": predicateTest }, [])
337    header_output += RegImmRegOpDeclare.subst(uxtbIop)
338    decoder_output += RegImmRegOpConstructor.subst(uxtbIop)
339    exec_output += PredOpExecute.subst(uxtbIop)
340
341    uxtabIop = InstObjParams("uxtab", "Uxtab", "RegRegRegImmOp",
342                             { "code":
343                               "Dest = (uint8_t)(Op2.ud >> imm) + Op1;",
344                               "predicate_test": predicateTest }, [])
345    header_output += RegRegRegImmOpDeclare.subst(uxtabIop)
346    decoder_output += RegRegRegImmOpConstructor.subst(uxtabIop)
347    exec_output += PredOpExecute.subst(uxtabIop)
348
349    uxtb16Code = '''
350    uint32_t resTemp = 0;
351    replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op1, imm + 7, imm)));
352    replaceBits(resTemp, 31, 16,
353                (uint8_t)(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
354    Dest = resTemp;
355    '''
356    uxtb16Iop = InstObjParams("uxtb16", "Uxtb16", "RegImmRegOp",
357                              { "code": uxtb16Code,
358                                "predicate_test": predicateTest }, [])
359    header_output += RegImmRegOpDeclare.subst(uxtb16Iop)
360    decoder_output += RegImmRegOpConstructor.subst(uxtb16Iop)
361    exec_output += PredOpExecute.subst(uxtb16Iop)
362
363    uxtab16Code = '''
364    uint32_t resTemp = 0;
365    replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op2, imm + 7, imm)) +
366                                        bits(Op1, 15, 0));
367    replaceBits(resTemp, 31, 16,
368                (uint8_t)(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
369                bits(Op1, 31, 16));
370    Dest = resTemp;
371    '''
372    uxtab16Iop = InstObjParams("uxtab16", "Uxtab16", "RegRegRegImmOp",
373                               { "code": uxtab16Code,
374                                 "predicate_test": predicateTest }, [])
375    header_output += RegRegRegImmOpDeclare.subst(uxtab16Iop)
376    decoder_output += RegRegRegImmOpConstructor.subst(uxtab16Iop)
377    exec_output += PredOpExecute.subst(uxtab16Iop)
378
379    uxthCode = '''
380    uint64_t rotated = (uint32_t)Op1;
381    rotated = (rotated | (rotated << 32)) >> imm;
382    Dest = (uint16_t)rotated;
383    '''
384    uxthIop = InstObjParams("uxth", "Uxth", "RegImmRegOp",
385                              { "code": uxthCode,
386                                "predicate_test": predicateTest }, [])
387    header_output += RegImmRegOpDeclare.subst(uxthIop)
388    decoder_output += RegImmRegOpConstructor.subst(uxthIop)
389    exec_output += PredOpExecute.subst(uxthIop)
390
391    uxtahCode = '''
392    uint64_t rotated = (uint32_t)Op2;
393    rotated = (rotated | (rotated << 32)) >> imm;
394    Dest = (uint16_t)rotated + Op1;
395    '''
396    uxtahIop = InstObjParams("uxtah", "Uxtah", "RegRegRegImmOp",
397                             { "code": uxtahCode,
398                               "predicate_test": predicateTest }, [])
399    header_output += RegRegRegImmOpDeclare.subst(uxtahIop)
400    decoder_output += RegRegRegImmOpConstructor.subst(uxtahIop)
401    exec_output += PredOpExecute.subst(uxtahIop)
402
403    selCode = '''
404        uint32_t resTemp = 0;
405        for (unsigned i = 0; i < 4; i++) {
406            int low = i * 8;
407            int high = low + 7;
408            replaceBits(resTemp, high, low,
409                        bits(CondCodes, 16 + i) ?
410                            bits(Op1, high, low) : bits(Op2, high, low));
411        }
412        Dest = resTemp;
413    '''
414    selIop = InstObjParams("sel", "Sel", "RegRegRegOp",
415                           { "code": selCode,
416                             "predicate_test": predicateTest }, [])
417    header_output += RegRegRegOpDeclare.subst(selIop)
418    decoder_output += RegRegRegOpConstructor.subst(selIop)
419    exec_output += PredOpExecute.subst(selIop)
420
421    usad8Code = '''
422        uint32_t resTemp = 0;
423        for (unsigned i = 0; i < 4; i++) {
424            int low = i * 8;
425            int high = low + 7;
426            int32_t diff = bits(Op1, high, low) -
427                           bits(Op2, high, low);
428            resTemp += ((diff < 0) ? -diff : diff);
429        }
430        Dest = resTemp;
431    '''
432    usad8Iop = InstObjParams("usad8", "Usad8", "RegRegRegOp",
433                             { "code": usad8Code,
434                               "predicate_test": predicateTest }, [])
435    header_output += RegRegRegOpDeclare.subst(usad8Iop)
436    decoder_output += RegRegRegOpConstructor.subst(usad8Iop)
437    exec_output += PredOpExecute.subst(usad8Iop)
438
439    usada8Code = '''
440        uint32_t resTemp = 0;
441        for (unsigned i = 0; i < 4; i++) {
442            int low = i * 8;
443            int high = low + 7;
444            int32_t diff = bits(Op1, high, low) -
445                           bits(Op2, high, low);
446            resTemp += ((diff < 0) ? -diff : diff);
447        }
448        Dest = Op3 + resTemp;
449    '''
450    usada8Iop = InstObjParams("usada8", "Usada8", "RegRegRegRegOp",
451                              { "code": usada8Code,
452                                "predicate_test": predicateTest }, [])
453    header_output += RegRegRegRegOpDeclare.subst(usada8Iop)
454    decoder_output += RegRegRegRegOpConstructor.subst(usada8Iop)
455    exec_output += PredOpExecute.subst(usada8Iop)
456
457    nopIop = InstObjParams("nop", "NopInst", "ArmStaticInst", "", [])
458    header_output += BasicDeclare.subst(nopIop)
459    decoder_output += BasicConstructor.subst(nopIop)
460    exec_output += BasicExecute.subst(nopIop)
461}};
462