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_DIRECTIVE .private_extern
  27 #define LOCAL_LABEL(name) L_##name
  28 #define FILE_LEVEL_DIRECTIVE  .subsections_via_symbols
  29 #define SYMBOL_IS_FUNC(name)
  30 #else
  31 #define HIDDEN_DIRECTIVE .hidden
  32 #define LOCAL_LABEL(name) .L_##name
  33 #define FILE_LEVEL_DIRECTIVE
  34 #  if defined(__arm__)
  35 #  define SYMBOL_IS_FUNC(name) .type name, %function
  36 #  else
  37 #  define SYMBOL_IS_FUNC(name) .type name, @function
  38 #  endif
  39 #endif
  40
  41 #if defined(__arm__)
  42 # ifndef __ARM_ARCH
  43 #  if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__) || \
  44      defined (__ARM_ARCH_7R__) || defined (__ARM_ARCH_7M__) || \
  45      defined (__ARM_ARCH_7EM__)
  46 #  define __ARM_ARCH 7
  47 #  endif
  48 # endif
  49
  50 # ifndef __ARM_ARCH
  51 #  if defined (__ARM_ARCH_6__) || \
  52       defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
  53       defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__) || \
  54       defined (__ARM_ARCH_6ZM__)
  55 #  define __ARM_ARCH 6
  56 #  endif
  57 # endif
  58
  59 # ifndef __ARM_ARCH
  60 #  if defined (__ARM_ARCH_5__) || defined (__ARM_ARCH_5T__) || \
  61       defined (__ARM_ARCH_5TE__) || defined (__ARM_ARCH_5TEJ__)
  62 #  define __ARM_ARCH 5
  63 #  endif
  64 # endif
  65
  66 # ifndef __ARM_ARCH
  67 # define __ARM_ARCH 4
  68 # endif
  69
  70 # if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
  71 # define ARM_HAS_BX
  72 # endif
  73 # if !defined(__ARM_FEATURE_CLZ) && \
  74      (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__)))
  75 # define __ARM_FEATURE_CLZ
  76 # endif
  77
  78 # ifdef ARM_HAS_BX
  79 # define JMP(r)         bx      r
  80 # define JMPc(r,c)      bx##c   r
  81 # else
  82 # define JMP(r)         mov     pc, r
  83 # define JMPc(r,c)      mov##c  pc, r
  84 # endif
  85 #endif
  86
  87 #define GLUE2(a, b) a ## b
  88 #define GLUE(a, b) GLUE2(a, b)
  89 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
  90
  91 #ifdef VISIBILITY_HIDDEN
  92 #define DECLARE_SYMBOL_VISIBILITY(name)                    \
  93   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR
  94 #else
  95 #define DECLARE_SYMBOL_VISIBILITY(name)
  96 #endif
  97
  98 #define DEFINE_COMPILERRT_FUNCTION(name)                   \
  99   FILE_LEVEL_DIRECTIVE     SEPARATOR                       \
 100   .globl SYMBOL_NAME(name) SEPARATOR                       \
 101   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
 102   DECLARE_SYMBOL_VISIBILITY(name)                          \
 103   SYMBOL_NAME(name):
 104
 105 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name)           \
 106   .globl SYMBOL_NAME(name) SEPARATOR                       \
 107   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
 108   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR             \
 109   SYMBOL_NAME(name):
 110
 111 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
 112   .globl name SEPARATOR                                    \
 113   SYMBOL_IS_FUNC(name) SEPARATOR                           \
 114   HIDDEN_DIRECTIVE name SEPARATOR                          \
 115   name:
 116
 117 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)     \
 118   .globl SYMBOL_NAME(name) SEPARATOR                       \
 119   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
 120   .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
 121
 122 #if defined (__ARM_EABI__)
 123 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)      \
 124   DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
 125 #else
 126 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
 127 #endif
 128
 129 #ifdef __ELF__
 130 #define END_COMPILERRT_FUNCTION(name) \
 131         .size   SYMBOL_NAME(name), . - SYMBOL_NAME(name)
 132 #else
 133 #define END_COMPILERRT_FUNCTION(name)
 134 #endif
 135
 136 #endif /* COMPILERRT_ASSEMBLY_H */