Completed :lower16: / :upper16: support for movw / movt pairs on Darwin.
[oota-llvm.git] / lib / Target / ARM / ARMFixupKinds.h
1 //===-- ARM/ARMFixupKinds.h - ARM Specific Fixup Entries --------*- 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 #ifndef LLVM_ARM_ARMFIXUPKINDS_H
11 #define LLVM_ARM_ARMFIXUPKINDS_H
12
13 #include "llvm/MC/MCFixup.h"
14
15 namespace llvm {
16 namespace ARM {
17 enum Fixups {
18   // fixup_arm_ldst_pcrel_12 - 12-bit PC relative relocation for symbol
19   // addresses
20   fixup_arm_ldst_pcrel_12 = FirstTargetFixupKind,
21
22   // fixup_t2_ldst_pcrel_12 - Equivalent to fixup_arm_ldst_pcrel_12, with
23   // the 16-bit halfwords reordered.
24   fixup_t2_ldst_pcrel_12,
25
26   // fixup_arm_pcrel_10 - 10-bit PC relative relocation for symbol addresses
27   // used in VFP instructions where the lower 2 bits are not encoded
28   // (so it's encoded as an 8-bit immediate).
29   fixup_arm_pcrel_10,
30   // fixup_t2_pcrel_10 - Equivalent to fixup_arm_pcrel_10, accounting for
31   // the short-swapped encoding of Thumb2 instructions.
32   fixup_t2_pcrel_10,
33   // fixup_thumb_adr_pcrel_10 - 10-bit PC relative relocation for symbol
34   // addresses where the lower 2 bits are not encoded (so it's encoded as an
35   // 8-bit immediate).
36   fixup_thumb_adr_pcrel_10,
37   // fixup_arm_adr_pcrel_12 - 12-bit PC relative relocation for the ADR
38   // instruction.
39   fixup_arm_adr_pcrel_12,
40   // fixup_t2_adr_pcrel_12 - 12-bit PC relative relocation for the ADR
41   // instruction.
42   fixup_t2_adr_pcrel_12,
43   // fixup_arm_branch - 24-bit PC relative relocation for direct branch
44   // instructions.
45   fixup_arm_branch,
46   // fixup_t2_condbranch - 20-bit PC relative relocation for Thumb2 direct
47   // uconditional branch instructions.
48   fixup_t2_condbranch,
49   // fixup_t2_uncondbranch - 20-bit PC relative relocation for Thumb2 direct
50   // branch unconditional branch instructions.
51   fixup_t2_uncondbranch,
52
53   // fixup_arm_thumb_br - 12-bit fixup for Thumb B instructions.
54   fixup_arm_thumb_br,
55
56   // fixup_arm_thumb_blx - Fixup for Thumb BL instructions.
57   fixup_arm_thumb_bl,
58
59   // fixup_arm_thumb_blx - Fixup for Thumb BLX instructions.
60   fixup_arm_thumb_blx,
61
62   // fixup_arm_thumb_cb - Fixup for Thumb branch instructions.
63   fixup_arm_thumb_cb,
64
65   // fixup_arm_thumb_cp - Fixup for Thumb load/store from constant pool instrs.
66   fixup_arm_thumb_cp,
67
68   // fixup_arm_thumb_bcc - Fixup for Thumb conditional branching instructions.
69   fixup_arm_thumb_bcc,
70
71   // The next two are for the movt/movw pair
72   // the 16bit imm field are split into imm{15-12} and imm{11-0}
73   fixup_arm_movt_hi16, // :upper16:
74   fixup_arm_movw_lo16, // :lower16:
75   fixup_t2_movt_hi16, // :upper16:
76   fixup_t2_movw_lo16, // :lower16:
77
78   // It is possible to create an "immediate" that happens to be pcrel.
79   // movw r0, :lower16:Foo-(Bar+8) and movt  r0, :upper16:Foo-(Bar+8)
80   // result in different reloc tags than the above two.
81   // Needed to support ELF::R_ARM_MOVT_PREL and ELF::R_ARM_MOVW_PREL_NC
82   fixup_arm_movt_hi16_pcrel, // :upper16:
83   fixup_arm_movw_lo16_pcrel, // :lower16:
84   fixup_t2_movt_hi16_pcrel, // :upper16:
85   fixup_t2_movw_lo16_pcrel, // :lower16:
86
87   // Marker
88   LastTargetFixupKind,
89   NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind
90 };
91 }
92 }
93
94 #endif