ARM.td revision 226633 
1//===- ARM.td - Describe the ARM Target Machine ------------*- tablegen -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//
11//===----------------------------------------------------------------------===//
12
13//===----------------------------------------------------------------------===//
14// Target-independent interfaces which we are implementing
15//===----------------------------------------------------------------------===//
16
17include "llvm/Target/Target.td"
18
19//===----------------------------------------------------------------------===//
20// ARM Subtarget state.
21//
22
23def ModeThumb  : SubtargetFeature<"thumb-mode", "InThumbMode", "true",
24                                  "Thumb mode">;
25
26def ModeNaCl   : SubtargetFeature<"nacl-mode", "InNaClMode", "true",
27                                  "Native client mode">;
28
29//===----------------------------------------------------------------------===//
30// ARM Subtarget features.
31//
32
33def FeatureVFP2 : SubtargetFeature<"vfp2", "HasVFPv2", "true",
34                                   "Enable VFP2 instructions">;
35def FeatureVFP3 : SubtargetFeature<"vfp3", "HasVFPv3", "true",
36                                   "Enable VFP3 instructions",
37                                   [FeatureVFP2]>;
38def FeatureNEON : SubtargetFeature<"neon", "HasNEON", "true",
39                                   "Enable NEON instructions",
40                                   [FeatureVFP3]>;
41def FeatureThumb2 : SubtargetFeature<"thumb2", "HasThumb2", "true",
42                                     "Enable Thumb2 instructions">;
43def FeatureNoARM  : SubtargetFeature<"noarm", "NoARM", "true",
44                                     "Does not support ARM mode execution">;
45def FeatureFP16   : SubtargetFeature<"fp16", "HasFP16", "true",
46                                     "Enable half-precision floating point">;
47def FeatureD16    : SubtargetFeature<"d16", "HasD16", "true",
48                                     "Restrict VFP3 to 16 double registers">;
49def FeatureHWDiv  : SubtargetFeature<"hwdiv", "HasHardwareDivide", "true",
50                                     "Enable divide instructions">;
51def FeatureT2XtPk : SubtargetFeature<"t2xtpk", "HasT2ExtractPack", "true",
52                                 "Enable Thumb2 extract and pack instructions">;
53def FeatureDB     : SubtargetFeature<"db", "HasDataBarrier", "true",
54                                   "Has data barrier (dmb / dsb) instructions">;
55def FeatureSlowFPBrcc : SubtargetFeature<"slow-fp-brcc", "SlowFPBrcc", "true",
56                                         "FP compare + branch is slow">;
57def FeatureVFPOnlySP : SubtargetFeature<"fp-only-sp", "FPOnlySP", "true",
58                          "Floating point unit supports single precision only">;
59
60// Some processors have FP multiply-accumulate instructions that don't
61// play nicely with other VFP / NEON instructions, and it's generally better
62// to just not use them.
63def FeatureHasSlowFPVMLx : SubtargetFeature<"slowfpvmlx", "SlowFPVMLx", "true",
64                                         "Disable VFP / NEON MAC instructions">;
65
66// Cortex-A8 / A9 Advanced SIMD has multiplier accumulator forwarding.
67def FeatureVMLxForwarding : SubtargetFeature<"vmlx-forwarding",
68                                       "HasVMLxForwarding", "true",
69                                       "Has multiplier accumulator forwarding">;
70
71// Some processors benefit from using NEON instructions for scalar
72// single-precision FP operations.
73def FeatureNEONForFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
74                                        "true",
75                                        "Use NEON for single precision FP">;
76
77// Disable 32-bit to 16-bit narrowing for experimentation.
78def FeaturePref32BitThumb : SubtargetFeature<"32bit", "Pref32BitThumb", "true",
79                                             "Prefer 32-bit Thumb instrs">;
80
81/// Some instructions update CPSR partially, which can add false dependency for
82/// out-of-order implementation, e.g. Cortex-A9, unless each individual bit is
83/// mapped to a separate physical register. Avoid partial CPSR update for these
84/// processors.
85def FeatureAvoidPartialCPSR : SubtargetFeature<"avoid-partial-cpsr",
86                                               "AvoidCPSRPartialUpdate", "true",
87                                 "Avoid CPSR partial update for OOO execution">;
88
89/// Some M architectures don't have the DSP extension (v7E-M vs. v7M)
90def FeatureDSPThumb2 : SubtargetFeature<"t2dsp", "Thumb2DSP", "true",
91                                 "Supports v7 DSP instructions in Thumb2">;
92
93// Multiprocessing extension.
94def FeatureMP : SubtargetFeature<"mp", "HasMPExtension", "true",
95                                 "Supports Multiprocessing extension">;
96
97// M-series ISA?
98def FeatureMClass : SubtargetFeature<"mclass", "IsMClass", "true",
99                                     "Is microcontroller profile ('M' series)">;
100
101// ARM ISAs.
102def HasV4TOps   : SubtargetFeature<"v4t", "HasV4TOps", "true",
103                                   "Support ARM v4T instructions">;
104def HasV5TOps   : SubtargetFeature<"v5t", "HasV5TOps", "true",
105                                   "Support ARM v5T instructions",
106                                   [HasV4TOps]>;
107def HasV5TEOps  : SubtargetFeature<"v5te", "HasV5TEOps", "true",
108                             "Support ARM v5TE, v5TEj, and v5TExp instructions",
109                                   [HasV5TOps]>;
110def HasV6Ops    : SubtargetFeature<"v6", "HasV6Ops", "true",
111                                   "Support ARM v6 instructions",
112                                   [HasV5TEOps]>;
113def HasV6T2Ops  : SubtargetFeature<"v6t2", "HasV6T2Ops", "true",
114                                   "Support ARM v6t2 instructions",
115                                   [HasV6Ops, FeatureThumb2]>;
116def HasV7Ops    : SubtargetFeature<"v7", "HasV7Ops", "true",
117                                   "Support ARM v7 instructions",
118                                   [HasV6T2Ops]>;
119
120//===----------------------------------------------------------------------===//
121// ARM Processors supported.
122//
123
124include "ARMSchedule.td"
125
126// ARM processor families.
127def ProcA8      : SubtargetFeature<"a8", "ARMProcFamily", "CortexA8",
128                                   "Cortex-A8 ARM processors",
129                                   [FeatureSlowFPBrcc, FeatureNEONForFP,
130                                    FeatureHasSlowFPVMLx, FeatureVMLxForwarding,
131                                    FeatureT2XtPk]>;
132def ProcA9      : SubtargetFeature<"a9", "ARMProcFamily", "CortexA9",
133                                   "Cortex-A9 ARM processors",
134                                   [FeatureVMLxForwarding,
135                                    FeatureT2XtPk, FeatureFP16,
136                                    FeatureAvoidPartialCPSR]>;
137
138class ProcNoItin<string Name, list<SubtargetFeature> Features>
139 : Processor<Name, GenericItineraries, Features>;
140
141// V4 Processors.
142def : ProcNoItin<"generic",         []>;
143def : ProcNoItin<"arm8",            []>;
144def : ProcNoItin<"arm810",          []>;
145def : ProcNoItin<"strongarm",       []>;
146def : ProcNoItin<"strongarm110",    []>;
147def : ProcNoItin<"strongarm1100",   []>;
148def : ProcNoItin<"strongarm1110",   []>;
149
150// V4T Processors.
151def : ProcNoItin<"arm7tdmi",        [HasV4TOps]>;
152def : ProcNoItin<"arm7tdmi-s",      [HasV4TOps]>;
153def : ProcNoItin<"arm710t",         [HasV4TOps]>;
154def : ProcNoItin<"arm720t",         [HasV4TOps]>;
155def : ProcNoItin<"arm9",            [HasV4TOps]>;
156def : ProcNoItin<"arm9tdmi",        [HasV4TOps]>;
157def : ProcNoItin<"arm920",          [HasV4TOps]>;
158def : ProcNoItin<"arm920t",         [HasV4TOps]>;
159def : ProcNoItin<"arm922t",         [HasV4TOps]>;
160def : ProcNoItin<"arm940t",         [HasV4TOps]>;
161def : ProcNoItin<"ep9312",          [HasV4TOps]>;
162
163// V5T Processors.
164def : ProcNoItin<"arm10tdmi",       [HasV5TOps]>;
165def : ProcNoItin<"arm1020t",        [HasV5TOps]>;
166
167// V5TE Processors.
168def : ProcNoItin<"arm9e",           [HasV5TEOps]>;
169def : ProcNoItin<"arm926ej-s",      [HasV5TEOps]>;
170def : ProcNoItin<"arm946e-s",       [HasV5TEOps]>;
171def : ProcNoItin<"arm966e-s",       [HasV5TEOps]>;
172def : ProcNoItin<"arm968e-s",       [HasV5TEOps]>;
173def : ProcNoItin<"arm10e",          [HasV5TEOps]>;
174def : ProcNoItin<"arm1020e",        [HasV5TEOps]>;
175def : ProcNoItin<"arm1022e",        [HasV5TEOps]>;
176def : ProcNoItin<"xscale",          [HasV5TEOps]>;
177def : ProcNoItin<"iwmmxt",          [HasV5TEOps]>;
178
179// V6 Processors.
180def : Processor<"arm1136j-s",       ARMV6Itineraries, [HasV6Ops]>;
181def : Processor<"arm1136jf-s",      ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
182                                                       FeatureHasSlowFPVMLx]>;
183def : Processor<"arm1176jz-s",      ARMV6Itineraries, [HasV6Ops]>;
184def : Processor<"arm1176jzf-s",     ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
185                                                       FeatureHasSlowFPVMLx]>;
186def : Processor<"mpcorenovfp",      ARMV6Itineraries, [HasV6Ops]>;
187def : Processor<"mpcore",           ARMV6Itineraries, [HasV6Ops, FeatureVFP2,
188                                                       FeatureHasSlowFPVMLx]>;
189
190// V6M Processors.
191def : Processor<"cortex-m0",        ARMV6Itineraries, [HasV6Ops, FeatureNoARM,
192                                                       FeatureDB, FeatureMClass]>;
193
194// V6T2 Processors.
195def : Processor<"arm1156t2-s",      ARMV6Itineraries, [HasV6T2Ops,
196                                                       FeatureDSPThumb2]>;
197def : Processor<"arm1156t2f-s",     ARMV6Itineraries, [HasV6T2Ops, FeatureVFP2,
198                                                       FeatureHasSlowFPVMLx,
199                                                       FeatureDSPThumb2]>;
200
201// V7a Processors.
202def : Processor<"cortex-a8",        CortexA8Itineraries,
203                                    [ProcA8, HasV7Ops, FeatureNEON, FeatureDB,
204                                     FeatureDSPThumb2]>;
205def : Processor<"cortex-a9",        CortexA9Itineraries,
206                                    [ProcA9, HasV7Ops, FeatureNEON, FeatureDB,
207                                     FeatureDSPThumb2]>;
208def : Processor<"cortex-a9-mp",     CortexA9Itineraries,
209                                    [ProcA9, HasV7Ops, FeatureNEON, FeatureDB,
210                                     FeatureDSPThumb2, FeatureMP]>;
211
212// V7M Processors.
213def : ProcNoItin<"cortex-m3",       [HasV7Ops,
214                                     FeatureThumb2, FeatureNoARM, FeatureDB,
215                                     FeatureHWDiv, FeatureMClass]>;
216
217// V7EM Processors.
218def : ProcNoItin<"cortex-m4",       [HasV7Ops,
219                                     FeatureThumb2, FeatureNoARM, FeatureDB,
220                                     FeatureHWDiv, FeatureDSPThumb2,
221                                     FeatureT2XtPk, FeatureVFP2,
222                                     FeatureVFPOnlySP, FeatureMClass]>;
223
224//===----------------------------------------------------------------------===//
225// Register File Description
226//===----------------------------------------------------------------------===//
227
228include "ARMRegisterInfo.td"
229
230include "ARMCallingConv.td"
231
232//===----------------------------------------------------------------------===//
233// Instruction Descriptions
234//===----------------------------------------------------------------------===//
235
236include "ARMInstrInfo.td"
237
238def ARMInstrInfo : InstrInfo;
239
240
241//===----------------------------------------------------------------------===//
242// Assembly printer
243//===----------------------------------------------------------------------===//
244// ARM Uses the MC printer for asm output, so make sure the TableGen
245// AsmWriter bits get associated with the correct class.
246def ARMAsmWriter : AsmWriter {
247  string AsmWriterClassName  = "InstPrinter";
248  bit isMCAsmWriter = 1;
249}
250
251//===----------------------------------------------------------------------===//
252// Declare the target which we are implementing
253//===----------------------------------------------------------------------===//
254
255def ARM : Target {
256  // Pull in Instruction Info:
257  let InstructionSet = ARMInstrInfo;
258
259  let AssemblyWriters = [ARMAsmWriter];
260}
261