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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 
18 namespace 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