1 //===- ARM.td - Describe the ARM Target Machine -----------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 //===----------------------------------------------------------------------===//
13 //===----------------------------------------------------------------------===//
14 // Target-independent interfaces which we are implementing
15 //===----------------------------------------------------------------------===//
17 include "llvm/Target/Target.td"
19 //===----------------------------------------------------------------------===//
20 // ARM Subtarget features.
23 def ArchV4T : SubtargetFeature<"v4t", "ARMArchVersion", "V4T",
25 def ArchV5T : SubtargetFeature<"v5t", "ARMArchVersion", "V5T",
27 def ArchV5TE : SubtargetFeature<"v5te", "ARMArchVersion", "V5TE",
28 "ARM v5TE, v5TEj, v5TExp">;
29 def ArchV6 : SubtargetFeature<"v6", "ARMArchVersion", "V6",
31 def ArchV6T2 : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2",
33 def ArchV7A : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
35 def ArchV7M : SubtargetFeature<"v7m", "ARMArchVersion", "V7M",
37 def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
38 "Enable VFP2 instructions">;
39 def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
40 "Enable VFP3 instructions">;
41 def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
42 "Enable NEON instructions">;
43 def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
44 "Enable Thumb2 instructions">;
45 def FeatureFP16 : SubtargetFeature<"fp16", "HasFP16", "true",
46 "Enable half-precision floating point">;
47 def FeatureHWDiv : SubtargetFeature<"hwdiv", "HasHardwareDivide", "true",
48 "Enable divide instructions">;
49 def FeatureT2ExtractPack: SubtargetFeature<"t2xtpk", "HasT2ExtractPack", "true",
50 "Enable Thumb2 extract and pack instructions">;
51 def FeatureSlowFPBrcc : SubtargetFeature<"slow-fp-brcc", "SlowFPBrcc", "true",
52 "FP compare + branch is slow">;
54 // Some processors have multiply-accumulate instructions that don't
55 // play nicely with other VFP instructions, and it's generally better
56 // to just not use them.
57 // FIXME: Currently, this is only flagged for Cortex-A8. It may be true for
58 // others as well. We should do more benchmarking and confirm one way or
60 def FeatureHasSlowVMLx : SubtargetFeature<"vmlx", "SlowVMLx", "true",
61 "Disable VFP MAC instructions">;
62 // Some processors benefit from using NEON instructions for scalar
63 // single-precision FP operations.
64 def FeatureNEONForFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
66 "Use NEON for single precision FP">;
68 // Disable 32-bit to 16-bit narrowing for experimentation.
69 def FeaturePref32BitThumb : SubtargetFeature<"32bit", "Pref32BitThumb", "true",
70 "Prefer 32-bit Thumb instrs">;
72 //===----------------------------------------------------------------------===//
73 // ARM Processors supported.
76 include "ARMSchedule.td"
78 class ProcNoItin<string Name, list<SubtargetFeature> Features>
79 : Processor<Name, GenericItineraries, Features>;
82 def : ProcNoItin<"generic", []>;
83 def : ProcNoItin<"arm8", []>;
84 def : ProcNoItin<"arm810", []>;
85 def : ProcNoItin<"strongarm", []>;
86 def : ProcNoItin<"strongarm110", []>;
87 def : ProcNoItin<"strongarm1100", []>;
88 def : ProcNoItin<"strongarm1110", []>;
91 def : ProcNoItin<"arm7tdmi", [ArchV4T]>;
92 def : ProcNoItin<"arm7tdmi-s", [ArchV4T]>;
93 def : ProcNoItin<"arm710t", [ArchV4T]>;
94 def : ProcNoItin<"arm720t", [ArchV4T]>;
95 def : ProcNoItin<"arm9", [ArchV4T]>;
96 def : ProcNoItin<"arm9tdmi", [ArchV4T]>;
97 def : ProcNoItin<"arm920", [ArchV4T]>;
98 def : ProcNoItin<"arm920t", [ArchV4T]>;
99 def : ProcNoItin<"arm922t", [ArchV4T]>;
100 def : ProcNoItin<"arm940t", [ArchV4T]>;
101 def : ProcNoItin<"ep9312", [ArchV4T]>;
104 def : ProcNoItin<"arm10tdmi", [ArchV5T]>;
105 def : ProcNoItin<"arm1020t", [ArchV5T]>;
108 def : ProcNoItin<"arm9e", [ArchV5TE]>;
109 def : ProcNoItin<"arm926ej-s", [ArchV5TE]>;
110 def : ProcNoItin<"arm946e-s", [ArchV5TE]>;
111 def : ProcNoItin<"arm966e-s", [ArchV5TE]>;
112 def : ProcNoItin<"arm968e-s", [ArchV5TE]>;
113 def : ProcNoItin<"arm10e", [ArchV5TE]>;
114 def : ProcNoItin<"arm1020e", [ArchV5TE]>;
115 def : ProcNoItin<"arm1022e", [ArchV5TE]>;
116 def : ProcNoItin<"xscale", [ArchV5TE]>;
117 def : ProcNoItin<"iwmmxt", [ArchV5TE]>;
120 def : Processor<"arm1136j-s", ARMV6Itineraries, [ArchV6]>;
121 def : Processor<"arm1136jf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2,
122 FeatureHasSlowVMLx]>;
123 def : Processor<"arm1176jz-s", ARMV6Itineraries, [ArchV6]>;
124 def : Processor<"arm1176jzf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
125 def : Processor<"mpcorenovfp", ARMV6Itineraries, [ArchV6]>;
126 def : Processor<"mpcore", ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
129 def : Processor<"arm1156t2-s", ARMV6Itineraries,
130 [ArchV6T2, FeatureThumb2]>;
131 def : Processor<"arm1156t2f-s", ARMV6Itineraries,
132 [ArchV6T2, FeatureThumb2, FeatureVFP2]>;
135 def : Processor<"cortex-a8", CortexA8Itineraries,
136 [ArchV7A, FeatureThumb2, FeatureNEON, FeatureHasSlowVMLx,
137 FeatureSlowFPBrcc, FeatureNEONForFP, FeatureT2ExtractPack]>;
138 def : Processor<"cortex-a9", CortexA9Itineraries,
139 [ArchV7A, FeatureThumb2, FeatureNEON, FeatureT2ExtractPack]>;
140 def : ProcNoItin<"cortex-m3", [ArchV7M, FeatureThumb2, FeatureHWDiv]>;
141 def : ProcNoItin<"cortex-m4", [ArchV7M, FeatureThumb2, FeatureHWDiv]>;
143 //===----------------------------------------------------------------------===//
144 // Register File Description
145 //===----------------------------------------------------------------------===//
147 include "ARMRegisterInfo.td"
149 include "ARMCallingConv.td"
151 //===----------------------------------------------------------------------===//
152 // Instruction Descriptions
153 //===----------------------------------------------------------------------===//
155 include "ARMInstrInfo.td"
157 def ARMInstrInfo : InstrInfo;
159 //===----------------------------------------------------------------------===//
160 // Declare the target which we are implementing
161 //===----------------------------------------------------------------------===//
164 // Pull in Instruction Info:
165 let InstructionSet = ARMInstrInfo;