sys/external/bsd/compiler_rt/dist/lib/builtins/assembly.h

   1 /* ===-- assembly.h - compiler-rt assembler support macros -----------------===
   2  *
   3  *                     The LLVM Compiler Infrastructure
   4  *
   5  * This file is dual licensed under the MIT and the University of Illinois Open
   6  * Source Licenses. See LICENSE.TXT for details.
   7  *
   8  * ===----------------------------------------------------------------------===
   9  *
  10  * This file defines macros for use in compiler-rt assembler source.
  11  * This file is not part of the interface of this library.
  12  *
  13  * ===----------------------------------------------------------------------===
  14  */
  15
  16 #ifndef COMPILERRT_ASSEMBLY_H
  17 #define COMPILERRT_ASSEMBLY_H
  18
  19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
  20 #define SEPARATOR @
  21 #else
  22 #define SEPARATOR ;
  23 #endif
  24
  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 #elif defined(__ELF__)
  32 #define HIDDEN(name) .hidden name
  33 #define LOCAL_LABEL(name) .L_##name
  34 #define FILE_LEVEL_DIRECTIVE
  35 #if defined(__arm__)
  36 #define SYMBOL_IS_FUNC(name) .type name,%function
  37 #else
  38 #define SYMBOL_IS_FUNC(name) .type name,@function
  39 #endif
  40 #else
  41 #define HIDDEN_DIRECTIVE(name)
  42 #define LOCAL_LABEL(name) .L ## name
  43 #define SYMBOL_IS_FUNC(name)                                                   \
  44   .def name SEPARATOR                                                          \
  45     .scl 2 SEPARATOR                                                           \
  46     .type 32 SEPARATOR                                                         \
  47   .endef
  48 #define FILE_LEVEL_DIRECTIVE
  49 #endif
  50
  51 #if defined(__arm__)
  52 #ifndef __ARM_ARCH
  53 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) ||                     \
  54     defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) ||                    \
  55     defined(__ARM_ARCH_7EM__)
  56 #define __ARM_ARCH 7
  57 #endif
  58 #endif
  59
  60 #ifndef __ARM_ARCH
  61 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) ||                     \
  62     defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) ||                    \
  63     defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6ZM__)
  64 #define __ARM_ARCH 6
  65 #endif
  66 #endif
  67
  68 #ifndef __ARM_ARCH
  69 #if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) ||                     \
  70     defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)
  71 #define __ARM_ARCH 5
  72 #endif
  73 #endif
  74
  75 #ifndef __ARM_ARCH
  76 #define __ARM_ARCH 4
  77 #endif
  78
  79 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
  80 #define ARM_HAS_BX
  81 #endif
  82 #if !defined(__ARM_FEATURE_CLZ) &&                                             \
  83     (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__)))
  84 #define __ARM_FEATURE_CLZ
  85 #endif
  86
  87 #ifdef ARM_HAS_BX
  88 #define JMP(r) bx r
  89 #define JMPc(r, c) bx##c r
  90 #else
  91 #define JMP(r) mov pc, r
  92 #define JMPc(r, c) mov##c pc, r
  93 #endif
  94
  95 #if __ARM_ARCH_ISA_THUMB == 2
  96 #define IT(cond)  it cond
  97 #define ITT(cond) itt cond
  98 #else
  99 #define IT(cond)
 100 #define ITT(cond)
 101 #endif
 102
 103 #if __ARM_ARCH_ISA_THUMB == 2
 104 #define WIDE(op) op.w
 105 #else
 106 #define WIDE(op) op
 107 #endif
 108 #endif
 109
 110 #define GLUE2(a, b) a##b
 111 #define GLUE(a, b) GLUE2(a, b)
 112 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
 113
 114 #ifdef VISIBILITY_HIDDEN
 115 #define DECLARE_SYMBOL_VISIBILITY(name)                                        \
 116   HIDDEN(SYMBOL_NAME(name)) SEPARATOR
 117 #else
 118 #define DECLARE_SYMBOL_VISIBILITY(name)
 119 #endif
 120
 121 #define DEFINE_COMPILERRT_FUNCTION(name)                                       \
 122   FILE_LEVEL_DIRECTIVE SEPARATOR                                               \
 123   .globl SYMBOL_NAME(name) SEPARATOR                                           \
 124   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR                                  \
 125   DECLARE_SYMBOL_VISIBILITY(name)                                              \
 126   SYMBOL_NAME(name):
 127
 128 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name)                               \
 129   FILE_LEVEL_DIRECTIVE SEPARATOR                                               \
 130   .globl SYMBOL_NAME(name) SEPARATOR                                           \
 131   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR                                  \
 132   HIDDEN(SYMBOL_NAME(name)) SEPARATOR                                          \
 133   SYMBOL_NAME(name):
 134
 135 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name)                     \
 136   .globl name SEPARATOR                                                        \
 137   SYMBOL_IS_FUNC(name) SEPARATOR                                               \
 138   HIDDEN(name) SEPARATOR                                                       \
 139   name:
 140
 141 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)                         \
 142   .globl SYMBOL_NAME(name) SEPARATOR                                           \
 143   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR                                  \
 144   .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
 145
 146 #if defined(__ARM_EABI__)
 147 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)                          \
 148   DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
 149 #else
 150 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
 151 #endif
 152
 153 #ifdef __ELF__
 154 #define END_COMPILERRT_FUNCTION(name)                                          \
 155   .size SYMBOL_NAME(name), . - SYMBOL_NAME(name)
 156 #else
 157 #define END_COMPILERRT_FUNCTION(name)
 158 #endif
 159
 160 #endif /* COMPILERRT_ASSEMBLY_H */