compiler-rt/lib/builtins/assembly.h

/* ===-- assembly.h - compiler-rt assembler support macros -----------------===
 *
 *                     The LLVM Compiler Infrastructure
 *
 * This file is dual licensed under the MIT and the University of Illinois Open
 * Source Licenses. See LICENSE.TXT for details.
 *
 * ===----------------------------------------------------------------------===
 *
 * This file defines macros for use in compiler-rt assembler source.
 * This file is not part of the interface of this library.
 *
 * ===----------------------------------------------------------------------===
 */

#ifndef COMPILERRT_ASSEMBLY_H
#define COMPILERRT_ASSEMBLY_H

#if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
#define SEPARATOR @
#else
#define SEPARATOR ;
#endif

#if defined(__APPLE__)
#define HIDDEN_DIRECTIVE .private_extern
#define LOCAL_LABEL(name) L_##name
#define FILE_LEVEL_DIRECTIVE  .subsections_via_symbols
#define SYMBOL_IS_FUNC(name)
#else
#define HIDDEN_DIRECTIVE .hidden
#define LOCAL_LABEL(name) .L_##name
#define FILE_LEVEL_DIRECTIVE
#  if defined(__arm__)
#  define SYMBOL_IS_FUNC(name) .type name, %function
#  else
#  define SYMBOL_IS_FUNC(name) .type name, @function
#  endif
#endif

#if defined(__arm__)
# ifndef __ARM_ARCH
#  if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__) || \
     defined (__ARM_ARCH_7R__) || defined (__ARM_ARCH_7M__) || \
     defined (__ARM_ARCH_7EM__)
#  define __ARM_ARCH 7
#  endif
# endif

# ifndef __ARM_ARCH
#  if defined (__ARM_ARCH_6__) || \
      defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
      defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__) || \
      defined (__ARM_ARCH_6ZM__)
#  define __ARM_ARCH 6
#  endif
# endif

# ifndef __ARM_ARCH
#  if defined (__ARM_ARCH_5__) || defined (__ARM_ARCH_5T__) || \
      defined (__ARM_ARCH_5TE__) || defined (__ARM_ARCH_5TEJ__)
#  define __ARM_ARCH 5
#  endif
# endif

# ifndef __ARM_ARCH
# define __ARM_ARCH 4
# endif

# if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
# define ARM_HAS_BX
# endif
# if !defined(__ARM_FEATURE_CLZ) && \
     (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__)))
# define __ARM_FEATURE_CLZ
# endif

# ifdef ARM_HAS_BX
# define JMP(r)		bx	r
# define JMPc(r,c)	bx##c	r
# else
# define JMP(r)		mov	pc, r
# define JMPc(r,c)	mov##c	pc, r
# endif
#endif

#define GLUE2(a, b) a ## b
#define GLUE(a, b) GLUE2(a, b)
#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)

#ifdef VISIBILITY_HIDDEN
#define DECLARE_SYMBOL_VISIBILITY(name)                    \
  HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR
#else
#define DECLARE_SYMBOL_VISIBILITY(name)
#endif

#define DEFINE_COMPILERRT_FUNCTION(name)                   \
  FILE_LEVEL_DIRECTIVE     SEPARATOR                       \
  .globl SYMBOL_NAME(name) SEPARATOR                       \
  SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
  DECLARE_SYMBOL_VISIBILITY(name)                          \
  SYMBOL_NAME(name):

#define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name)           \
  .globl SYMBOL_NAME(name) SEPARATOR                       \
  SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
  HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR             \
  SYMBOL_NAME(name):

#define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
  .globl name SEPARATOR                                    \
  SYMBOL_IS_FUNC(name) SEPARATOR                           \
  HIDDEN_DIRECTIVE name SEPARATOR                          \
  name:

#define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)     \
  .globl SYMBOL_NAME(name) SEPARATOR                       \
  SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR              \
  .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR

#if defined (__ARM_EABI__)
# define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)      \
  DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
#else
# define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
#endif

#ifdef __ELF__
#define END_COMPILERRT_FUNCTION(name) \
	.size	SYMBOL_NAME(name), . - SYMBOL_NAME(name)
#else
#define END_COMPILERRT_FUNCTION(name)
#endif

#endif /* COMPILERRT_ASSEMBLY_H */