1 /* ===-- assembly.h - compiler-rt assembler support macros -----------------===
3 * The LLVM Compiler Infrastructure
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
8 * ===----------------------------------------------------------------------===
10 * This file defines macros for use in compiler-rt assembler source.
11 * This file is not part of the interface of this library.
13 * ===----------------------------------------------------------------------===
16 #ifndef COMPILERRT_ASSEMBLY_H
17 #define COMPILERRT_ASSEMBLY_H
19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
25 #if defined(__APPLE__)
26 #define HIDDEN(name) .private_extern name
27 #define LOCAL_LABEL(name) L_##name
28 // tell linker it can break up file at label boundaries
29 #define FILE_LEVEL_DIRECTIVE .subsections_via_symbols
30 #define SYMBOL_IS_FUNC(name)
31 #define CONST_SECTION .const
33 #elif defined(__ELF__)
35 #define HIDDEN(name) .hidden name
36 #define LOCAL_LABEL(name) .L_##name
37 #define FILE_LEVEL_DIRECTIVE
39 #define SYMBOL_IS_FUNC(name) .type name,%function
41 #define SYMBOL_IS_FUNC(name) .type name,@function
43 #define CONST_SECTION .section .rodata
45 #else // !__APPLE__ && !__ELF__
48 #define LOCAL_LABEL(name) .L ## name
49 #define FILE_LEVEL_DIRECTIVE
50 #define SYMBOL_IS_FUNC(name) \
55 #define CONST_SECTION .section .rdata,"rd"
60 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
63 #if !defined(__ARM_FEATURE_CLZ) && \
64 (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__)))
65 #define __ARM_FEATURE_CLZ
70 #define JMPc(r, c) bx##c r
72 #define JMP(r) mov pc, r
73 #define JMPc(r, c) mov##c pc, r
76 // pop {pc} can't switch Thumb mode on ARMv4T
78 #define POP_PC() pop {pc}
85 #if __ARM_ARCH_ISA_THUMB == 2
86 #define IT(cond) it cond
87 #define ITT(cond) itt cond
93 #if __ARM_ARCH_ISA_THUMB == 2
100 #define GLUE2(a, b) a##b
101 #define GLUE(a, b) GLUE2(a, b)
102 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
104 #ifdef VISIBILITY_HIDDEN
105 #define DECLARE_SYMBOL_VISIBILITY(name) \
106 HIDDEN(SYMBOL_NAME(name)) SEPARATOR
108 #define DECLARE_SYMBOL_VISIBILITY(name)
111 #define DEFINE_COMPILERRT_FUNCTION(name) \
112 FILE_LEVEL_DIRECTIVE SEPARATOR \
113 .globl SYMBOL_NAME(name) SEPARATOR \
114 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
115 DECLARE_SYMBOL_VISIBILITY(name) \
118 #define DEFINE_COMPILERRT_THUMB_FUNCTION(name) \
119 FILE_LEVEL_DIRECTIVE SEPARATOR \
120 .globl SYMBOL_NAME(name) SEPARATOR \
121 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
122 DECLARE_SYMBOL_VISIBILITY(name) SEPARATOR \
123 .thumb_func SEPARATOR \
126 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name) \
127 FILE_LEVEL_DIRECTIVE SEPARATOR \
128 .globl SYMBOL_NAME(name) SEPARATOR \
129 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
130 HIDDEN(SYMBOL_NAME(name)) SEPARATOR \
133 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
134 .globl name SEPARATOR \
135 SYMBOL_IS_FUNC(name) SEPARATOR \
136 HIDDEN(name) SEPARATOR \
139 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target) \
140 .globl SYMBOL_NAME(name) SEPARATOR \
141 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
142 .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
144 #if defined(__ARM_EABI__)
145 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) \
146 DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
148 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
152 #define END_COMPILERRT_FUNCTION(name) \
153 .size SYMBOL_NAME(name), . - SYMBOL_NAME(name)
155 #define END_COMPILERRT_FUNCTION(name)
158 #endif /* COMPILERRT_ASSEMBLY_H */