1//===-- ARMBuildAttrs.h - ARM Build Attributes ------------------*- C++ -*-===//
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// This file contains enumerations and support routines for ARM build attributes
11// as defined in ARM ABI addenda document (ABI release 2.08).
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef __TARGET_ARMBUILDATTRS_H__
16#define __TARGET_ARMBUILDATTRS_H__
17
18namespace ARMBuildAttrs {
19  enum SpecialAttr {
20    // This is for the .cpu asm attr. It translates into one or more
21    // AttrType (below) entries in the .ARM.attributes section in the ELF.
22    SEL_CPU
23  };
24
25  enum AttrType {
26    // Rest correspond to ELF/.ARM.attributes
27    File                      = 1,
28    Section                   = 2,
29    Symbol                    = 3,
30    CPU_raw_name              = 4,
31    CPU_name                  = 5,
32    CPU_arch                  = 6,
33    CPU_arch_profile          = 7,
34    ARM_ISA_use               = 8,
35    THUMB_ISA_use             = 9,
36    VFP_arch                  = 10,
37    WMMX_arch                 = 11,
38    Advanced_SIMD_arch        = 12,
39    PCS_config                = 13,
40    ABI_PCS_R9_use            = 14,
41    ABI_PCS_RW_data           = 15,
42    ABI_PCS_RO_data           = 16,
43    ABI_PCS_GOT_use           = 17,
44    ABI_PCS_wchar_t           = 18,
45    ABI_FP_rounding           = 19,
46    ABI_FP_denormal           = 20,
47    ABI_FP_exceptions         = 21,
48    ABI_FP_user_exceptions    = 22,
49    ABI_FP_number_model       = 23,
50    ABI_align8_needed         = 24,
51    ABI_align8_preserved      = 25,
52    ABI_enum_size             = 26,
53    ABI_HardFP_use            = 27,
54    ABI_VFP_args              = 28,
55    ABI_WMMX_args             = 29,
56    ABI_optimization_goals    = 30,
57    ABI_FP_optimization_goals = 31,
58    compatibility             = 32,
59    CPU_unaligned_access      = 34,
60    VFP_HP_extension          = 36,
61    ABI_FP_16bit_format       = 38,
62    MPextension_use           = 42, // was 70, 2.08 ABI
63    DIV_use                   = 44,
64    nodefaults                = 64,
65    also_compatible_with      = 65,
66    T2EE_use                  = 66,
67    conformance               = 67,
68    Virtualization_use        = 68,
69    MPextension_use_old       = 70
70  };
71
72  // Magic numbers for .ARM.attributes
73  enum AttrMagic {
74    Format_Version  = 0x41
75  };
76
77  // Legal Values for CPU_arch, (=6), uleb128
78  enum CPUArch {
79    Pre_v4       = 0,
80    v4       = 1,   // e.g. SA110
81    v4T      = 2,   // e.g. ARM7TDMI
82    v5T      = 3,   // e.g. ARM9TDMI
83    v5TE     = 4,   // e.g. ARM946E_S
84    v5TEJ    = 5,   // e.g. ARM926EJ_S
85    v6       = 6,   // e.g. ARM1136J_S
86    v6KZ     = 7,   // e.g. ARM1176JZ_S
87    v6T2     = 8,   // e.g. ARM1156T2F_S
88    v6K      = 9,   // e.g. ARM1136J_S
89    v7       = 10,  // e.g. Cortex A8, Cortex M3
90    v6_M     = 11,  // e.g. Cortex M1
91    v6S_M    = 12,  // v6_M with the System extensions
92    v7E_M    = 13   // v7_M with DSP extensions
93  };
94
95  enum CPUArchProfile { // (=7), uleb128
96    Not_Applicable = 0, // pre v7, or cross-profile code
97    ApplicationProfile = (0x41), // 'A' (e.g. for Cortex A8)
98    RealTimeProfile = (0x52), // 'R' (e.g. for Cortex R4)
99    MicroControllerProfile = (0x4D), // 'M' (e.g. for Cortex M3)
100    SystemProfile = (0x53) // 'S' Application or real-time profile
101  };
102
103  // The following have a lot of common use cases
104  enum {
105    //ARMISAUse (=8), uleb128  and THUMBISAUse (=9), uleb128
106    Not_Allowed = 0,
107    Allowed = 1,
108
109    // FP_arch (=10), uleb128 (formerly Tag_VFP_arch = 10)
110    AllowFPv2  = 2, // v2 FP ISA permitted (implies use of the v1 FP ISA)
111    AllowFPv3A = 3, // v3 FP ISA permitted (implies use of the v2 FP ISA)
112    AllowFPv3B = 4, // v3 FP ISA permitted, but only D0-D15, S0-S31
113    AllowFPv4A = 5, // v4 FP ISA permitted (implies use of v3 FP ISA)
114    AllowFPv4B = 6, // v4 FP ISA was permitted, but only D0-D15, S0-S31
115
116    // Tag_WMMX_arch, (=11), uleb128
117    AllowThumb32 = 2, // 32-bit Thumb (implies 16-bit instructions)
118
119    // Tag_WMMX_arch, (=11), uleb128
120    AllowWMMXv1 = 2,  // The user permitted this entity to use WMMX v2
121
122    // Tag_ABI_FP_denormal, (=20), uleb128
123    PreserveFPSign = 2, // sign when flushed-to-zero is preserved
124
125    // Tag_ABI_FP_number_model, (=23), uleb128
126    AllowRTABI = 2,  // numbers, infinities, and one quiet NaN (see [RTABI])
127    AllowIEE754 = 3 // this code to use all the IEEE 754-defined FP encodings
128  };
129}
130
131#endif // __TARGET_ARMBUILDATTRS_H__
132