1 //===-- ARMBuildAttributes.h - ARM Build Attributes -------------*- 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 //===----------------------------------------------------------------------===//
10 // This file contains enumerations and support routines for ARM build attributes
11 // as defined in ARM ABI addenda document (ABI release 2.08).
13 // ELF for the ARM Architecture r2.09 - November 30, 2012
15 // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044e/IHI0044E_aaelf.pdf
17 //===----------------------------------------------------------------------===//
19 #ifndef LLVM_SUPPORT_ARMBUILDATTRIBUTES_H
20 #define LLVM_SUPPORT_ARMBUILDATTRIBUTES_H
25 namespace ARMBuildAttrs {
28 // This is for the .cpu asm attr. It translates into one or more
29 // AttrType (below) entries in the .ARM.attributes section in the ELF.
34 // Rest correspond to ELF/.ARM.attributes
44 Advanced_SIMD_arch = 12,
53 ABI_FP_exceptions = 21,
54 ABI_FP_user_exceptions = 22,
55 ABI_FP_number_model = 23,
56 ABI_align_needed = 24,
57 ABI_align_preserved = 25,
62 ABI_optimization_goals = 30,
63 ABI_FP_optimization_goals = 31,
65 CPU_unaligned_access = 34,
67 ABI_FP_16bit_format = 38,
68 MPextension_use = 42, // recoded from 70 (ABI r2.08)
71 also_compatible_with = 65,
73 Virtualization_use = 68,
76 Section = 2, // deprecated (ABI r2.09)
77 Symbol = 3, // deprecated (ABI r2.09)
78 ABI_align8_needed = 24, // renamed to ABI_align_needed (ABI r2.09)
79 ABI_align8_preserved = 25, // renamed to ABI_align_preserved (ABI r2.09)
80 nodefaults = 64, // deprecated (ABI r2.09)
81 T2EE_use = 66, // deprecated (ABI r2.09)
82 MPextension_use_old = 70 // recoded to MPextension_use (ABI r2.08)
85 StringRef AttrTypeAsString(unsigned Attr, bool HasTagPrefix = true);
86 StringRef AttrTypeAsString(AttrType Attr, bool HasTagPrefix = true);
87 int AttrTypeFromString(StringRef Tag);
89 // Magic numbers for .ARM.attributes
94 // Legal Values for CPU_arch, (=6), uleb128
98 v4T = 2, // e.g. ARM7TDMI
99 v5T = 3, // e.g. ARM9TDMI
100 v5TE = 4, // e.g. ARM946E_S
101 v5TEJ = 5, // e.g. ARM926EJ_S
102 v6 = 6, // e.g. ARM1136J_S
103 v6KZ = 7, // e.g. ARM1176JZ_S
104 v6T2 = 8, // e.g. ARM1156T2_S
105 v6K = 9, // e.g. ARM1176JZ_S
106 v7 = 10, // e.g. Cortex A8, Cortex M3
107 v6_M = 11, // e.g. Cortex M1
108 v6S_M = 12, // v6_M with the System extensions
109 v7E_M = 13, // v7_M with DSP extensions
110 v8_A = 14, // v8_A AArch32
111 v8_R = 15, // e.g. Cortex R52
112 v8_M_Base= 16, // v8_M_Base AArch32
113 v8_M_Main= 17, // v8_M_Main AArch32
116 enum CPUArchProfile { // (=7), uleb128
117 Not_Applicable = 0, // pre v7, or cross-profile code
118 ApplicationProfile = (0x41), // 'A' (e.g. for Cortex A8)
119 RealTimeProfile = (0x52), // 'R' (e.g. for Cortex R4)
120 MicroControllerProfile = (0x4D), // 'M' (e.g. for Cortex M3)
121 SystemProfile = (0x53) // 'S' Application or real-time profile
124 // The following have a lot of common use cases
129 // Tag_ARM_ISA_use (=8), uleb128
131 // Tag_THUMB_ISA_use, (=9), uleb128
132 AllowThumb32 = 2, // 32-bit Thumb (implies 16-bit instructions)
133 AllowThumbDerived = 3, // Thumb allowed, derived from arch/profile
135 // Tag_FP_arch (=10), uleb128 (formerly Tag_VFP_arch = 10)
136 AllowFPv2 = 2, // v2 FP ISA permitted (implies use of the v1 FP ISA)
137 AllowFPv3A = 3, // v3 FP ISA permitted (implies use of the v2 FP ISA)
138 AllowFPv3B = 4, // v3 FP ISA permitted, but only D0-D15, S0-S31
139 AllowFPv4A = 5, // v4 FP ISA permitted (implies use of v3 FP ISA)
140 AllowFPv4B = 6, // v4 FP ISA was permitted, but only D0-D15, S0-S31
141 AllowFPARMv8A = 7, // Use of the ARM v8-A FP ISA was permitted
142 AllowFPARMv8B = 8, // Use of the ARM v8-A FP ISA was permitted, but only
145 // Tag_WMMX_arch, (=11), uleb128
146 AllowWMMXv1 = 1, // The user permitted this entity to use WMMX v1
147 AllowWMMXv2 = 2, // The user permitted this entity to use WMMX v2
149 // Tag_Advanced_SIMD_arch, (=12), uleb128
150 AllowNeon = 1, // SIMDv1 was permitted
151 AllowNeon2 = 2, // SIMDv2 was permitted (Half-precision FP, MAC operations)
152 AllowNeonARMv8 = 3, // ARM v8-A SIMD was permitted
153 AllowNeonARMv8_1a = 4,// ARM v8.1-A SIMD was permitted (RDMA)
155 // Tag_ABI_PCS_R9_use, (=14), uleb128
156 R9IsGPR = 0, // R9 used as v6 (just another callee-saved register)
157 R9IsSB = 1, // R9 used as a global static base rgister
158 R9IsTLSPointer = 2, // R9 used as a thread local storage pointer
159 R9Reserved = 3, // R9 not used by code associated with attributed entity
161 // Tag_ABI_PCS_RW_data, (=15), uleb128
162 AddressRWPCRel = 1, // Address RW static data PC-relative
163 AddressRWSBRel = 2, // Address RW static data SB-relative
164 AddressRWNone = 3, // No RW static data permitted
166 // Tag_ABI_PCS_RO_data, (=14), uleb128
167 AddressROPCRel = 1, // Address RO static data PC-relative
168 AddressRONone = 2, // No RO static data permitted
170 // Tag_ABI_PCS_GOT_use, (=17), uleb128
171 AddressDirect = 1, // Address imported data directly
172 AddressGOT = 2, // Address imported data indirectly (via GOT)
174 // Tag_ABI_PCS_wchar_t, (=18), uleb128
175 WCharProhibited = 0, // wchar_t is not used
176 WCharWidth2Bytes = 2, // sizeof(wchar_t) == 2
177 WCharWidth4Bytes = 4, // sizeof(wchar_t) == 4
179 // Tag_ABI_align_needed, (=24), uleb128
184 // Tag_ABI_align_needed, (=25), uleb128
185 AlignNotPreserved = 0,
186 AlignPreserve8Byte = 1,
187 AlignPreserveAll = 2,
189 // Tag_ABI_FP_denormal, (=20), uleb128
192 PreserveFPSign = 2, // sign when flushed-to-zero is preserved
194 // Tag_ABI_FP_number_model, (=23), uleb128
196 AllowRTABI = 2, // numbers, infinities, and one quiet NaN (see [RTABI])
197 AllowIEEE754 = 3, // this code to use all the IEEE 754-defined FP encodings
199 // Tag_ABI_enum_size, (=26), uleb128
200 EnumProhibited = 0, // The user prohibited the use of enums when building
202 EnumSmallest = 1, // Enum is smallest container big enough to hold all
204 Enum32Bit = 2, // Enum is at least 32 bits.
205 Enum32BitABI = 3, // Every enumeration visible across an ABI-complying
206 // interface contains a value needing 32 bits to encode
207 // it; other enums can be containerized.
209 // Tag_ABI_HardFP_use, (=27), uleb128
210 HardFPImplied = 0, // FP use should be implied by Tag_FP_arch
211 HardFPSinglePrecision = 1, // Single-precision only
213 // Tag_ABI_VFP_args, (=28), uleb128
217 // Tag_FP_HP_extension, (=36), uleb128
218 AllowHPFP = 1, // Allow use of Half Precision FP
220 // Tag_FP_16bit_format, (=38), uleb128
224 // Tag_MPextension_use, (=42), uleb128
225 AllowMP = 1, // Allow use of MP extensions
227 // Tag_DIV_use, (=44), uleb128
228 // Note: AllowDIVExt must be emitted if and only if the permission to use
229 // hardware divide cannot be conveyed using AllowDIVIfExists or DisallowDIV
230 AllowDIVIfExists = 0, // Allow hardware divide if available in arch, or no
232 DisallowDIV = 1, // Hardware divide explicitly disallowed.
233 AllowDIVExt = 2, // Allow hardware divide as optional architecture
234 // extension above the base arch specified by
235 // Tag_CPU_arch and Tag_CPU_arch_profile.
237 // Tag_Virtualization_use, (=68), uleb128
239 AllowVirtualization = 2,
240 AllowTZVirtualization = 3
243 } // namespace ARMBuildAttrs