summaryrefslogtreecommitdiff
path: root/src/arch/x86/isa/microops/mediaop.isa
blob: 7e03fcba349014d74687660941fff4950338c14c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
/// Copyright (c) 2009 The Regents of The University of Michigan
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black

def template MediaOpExecute {{
        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
                Trace::InstRecord *traceData) const
        {
            Fault fault = NoFault;

            %(op_decl)s;
            %(op_rd)s;

            %(code)s;

            //Write the resulting state to the execution context
            if(fault == NoFault)
            {
                %(op_wb)s;
            }
            return fault;
        }
}};

def template MediaOpRegDeclare {{
    class %(class_name)s : public %(base_class)s
    {
      protected:
        void buildMe();

      public:
        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
                uint8_t _srcSize, uint8_t _destSize, uint16_t _sel);

        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
                uint8_t _srcSize, uint8_t _destSize, uint16_t _sel);

        %(BasicExecDeclare)s
    };
}};

def template MediaOpImmDeclare {{

    class %(class_name)s : public %(base_class)s
    {
      protected:
        void buildMe();

      public:
        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                InstRegIndex _src1, uint16_t _imm8, InstRegIndex _dest,
                uint8_t _srcSize, uint8_t _destSize, uint16_t _sel);

        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                InstRegIndex _src1, uint16_t _imm8, InstRegIndex _dest,
                uint8_t _srcSize, uint8_t _destSize, uint16_t _sel);

        %(BasicExecDeclare)s
    };
}};

def template MediaOpRegConstructor {{

    inline void %(class_name)s::buildMe()
    {
        %(constructor)s;
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
            uint8_t _srcSize, uint8_t _destSize, uint16_t _sel) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                false, false, false, false,
                _src1, _src2, _dest, _srcSize, _destSize, _sel,
                %(op_class)s)
    {
        buildMe();
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
            InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
            uint8_t _srcSize, uint8_t _destSize, uint16_t _sel) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                isMicro, isDelayed, isFirst, isLast,
                _src1, _src2, _dest, _srcSize, _destSize, _sel,
                %(op_class)s)
    {
        buildMe();
    }
}};

def template MediaOpImmConstructor {{

    inline void %(class_name)s::buildMe()
    {
        %(constructor)s;
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            InstRegIndex _src1, uint16_t _imm8, InstRegIndex _dest,
            uint8_t _srcSize, uint8_t _destSize, uint16_t _sel) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                false, false, false, false,
                _src1, _imm8, _dest, _srcSize, _destSize, _sel,
                %(op_class)s)
    {
        buildMe();
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
            InstRegIndex _src1, uint16_t _imm8, InstRegIndex _dest,
            uint8_t _srcSize, uint8_t _destSize, uint16_t _sel) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                isMicro, isDelayed, isFirst, isLast,
                _src1, _imm8, _dest, _srcSize, _destSize, _sel,
                %(op_class)s)
    {
        buildMe();
    }
}};

let {{
    # Make these empty strings so that concatenating onto
    # them will always work.
    header_output = ""
    decoder_output = ""
    exec_output = ""

    immTemplates = (
            MediaOpImmDeclare,
            MediaOpImmConstructor,
            MediaOpExecute)

    regTemplates = (
            MediaOpRegDeclare,
            MediaOpRegConstructor,
            MediaOpExecute)

    class MediaOpMeta(type):
        def buildCppClasses(self, name, Name, suffix, code):

            # Globals to stick the output in
            global header_output
            global decoder_output
            global exec_output

            # If op2 is used anywhere, make register and immediate versions
            # of this code.
            matcher = re.compile("(?<!\\w)(?P<prefix>s?)op2(?P<typeQual>\\.\\w+)?")
            match = matcher.search(code)
            if match:
                typeQual = ""
                if match.group("typeQual"):
                    typeQual = match.group("typeQual")
                src2_name = "%spsrc2%s" % (match.group("prefix"), typeQual)
                self.buildCppClasses(name, Name, suffix,
                        matcher.sub(src2_name, code))
                self.buildCppClasses(name + "i", Name, suffix + "Imm",
                        matcher.sub("imm8", code))
                return

            base = "X86ISA::MediaOp"

            # If imm8 shows up in the code, use the immediate templates, if
            # not, hopefully the register ones will be correct.
            matcher = re.compile("(?<!\w)imm8(?!\w)")
            if matcher.search(code):
                base += "Imm"
                templates = immTemplates
            else:
                base += "Reg"
                templates = regTemplates

            # Get everything ready for the substitution
            iop = InstObjParams(name, Name + suffix, base, {"code" : code})

            # Generate the actual code (finally!)
            header_output += templates[0].subst(iop)
            decoder_output += templates[1].subst(iop)
            exec_output += templates[2].subst(iop)


        def __new__(mcls, Name, bases, dict):
            abstract = False
            name = Name.lower()
            if "abstract" in dict:
                abstract = dict['abstract']
                del dict['abstract']

            cls = super(MediaOpMeta, mcls).__new__(mcls, Name, bases, dict)
            if not abstract:
                cls.className = Name
                cls.base_mnemonic = name
                code = cls.code

                # Set up the C++ classes
                mcls.buildCppClasses(cls, name, Name, "", code)

                # Hook into the microassembler dict
                global microopClasses
                microopClasses[name] = cls

                # If op2 is used anywhere, make register and immediate versions
                # of this code.
                matcher = re.compile("op2(?P<typeQual>\\.\\w+)?")
                if matcher.search(code):
                    microopClasses[name + 'i'] = cls
            return cls


    class MediaOp(X86Microop):
        __metaclass__ = MediaOpMeta
        # This class itself doesn't act as a microop
        abstract = True

        def __init__(self, dest, src1, op2,
                size = None, destSize = None, srcSize = None, sel = None):
            self.dest = dest
            self.src1 = src1
            self.op2 = op2
            if size is not None:
                self.srcSize = size
                self.destSize = size
            if srcSize is not None:
                self.srcSize = srcSize
            if destSize is not None:
                self.destSize = destSize
            if self.srcSize is None:
                raise Exception, "Source size not set."
            if self.destSize is None:
                raise Exception, "Dest size not set."
            if sel is None:
                self.sel = 0
            else:
                self.sel = sel

        def getAllocator(self, *microFlags):
            className = self.className
            if self.mnemonic == self.base_mnemonic + 'i':
                className += "Imm"
            allocator = '''new %(class_name)s(machInst, macrocodeBlock
                    %(flags)s, %(src1)s, %(op2)s, %(dest)s,
                    %(srcSize)s, %(destSize)s, %(sel)s)''' % {
                "class_name" : className,
                "flags" : self.microFlagsText(microFlags),
                "src1" : self.src1, "op2" : self.op2,
                "dest" : self.dest,
                "srcSize" : self.srcSize,
                "destSize" : self.destSize,
                "sel" : self.sel}
            return allocator

    class Mov2int(MediaOp):
        def __init__(self, dest, src, \
                size = None, destSize = None, srcSize = None, sel = None):
            super(Mov2int, self).__init__(dest, src,\
                    "InstRegIndex(0)", size, destSize, srcSize, sel)
        code = '''
            uint64_t fpSrcReg1 = bits(FpSrcReg1.uqw, srcSize * 8 - 1, 0);
            DestReg = merge(DestReg, fpSrcReg1, destSize);
        '''

    class Mov2fp(MediaOp):
        def __init__(self, dest, src, \
                size = None, destSize = None, srcSize = None, sel = None):
            super(Mov2fp, self).__init__(dest, src,\
                    "InstRegIndex(0)", size, destSize, srcSize, sel)
        code = '''
            uint64_t srcReg1 = pick(SrcReg1, 0, srcSize);
            FpDestReg.uqw =
                insertBits(FpDestReg.uqw, destSize * 8 - 1, 0, srcReg1);
        '''

    class Unpack(MediaOp):
        code = '''
            assert(srcSize == destSize);
            int size = destSize;
            int items = (sizeof(FloatRegBits) / size) / 2;
            int offset = sel ? items : 0;
            uint64_t result = 0;
            for (int i = 0; i < items; i++) {
                uint64_t pickedLow =
                    bits(FpSrcReg1.uqw, (i + offset + 1) * 8 * size - 1,
                                        (i + offset) * 8 * size);
                result = insertBits(result,
                                    (2 * i + 1) * 8 * size - 1,
                                    (2 * i + 0) * 8 * size,
                                    pickedLow);
                uint64_t pickedHigh =
                    bits(FpSrcReg2.uqw, (i + offset + 1) * 8 * size - 1,
                                        (i + offset) * 8 * size);
                result = insertBits(result,
                                    (2 * i + 2) * 8 * size - 1,
                                    (2 * i + 1) * 8 * size,
                                    pickedHigh);
            }
            FpDestReg.uqw = result;
        '''
}};