diff options
Diffstat (limited to 'include/ruby/internal/has/builtin.h')
| -rw-r--r-- | include/ruby/internal/has/builtin.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/ruby/internal/has/builtin.h b/include/ruby/internal/has/builtin.h new file mode 100644 index 0000000000..46f587c2cf --- /dev/null +++ b/include/ruby/internal/has/builtin.h @@ -0,0 +1,105 @@ +#ifndef RBIMPL_HAS_BUILTIN_H /*-*-C++-*-vi:se ft=cpp:*/ +#define RBIMPL_HAS_BUILTIN_H +/** + * @file + * @author Ruby developers <ruby-core@ruby-lang.org> + * @copyright This file is a part of the programming language Ruby. + * Permission is hereby granted, to either redistribute and/or + * modify this file, provided that the conditions mentioned in the + * file COPYING are met. Consult the file for details. + * @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are + * implementation details. Don't take them as canon. They could + * rapidly appear then vanish. The name (path) of this header file + * is also an implementation detail. Do not expect it to persist + * at the place it is now. Developers are free to move it anywhere + * anytime at will. + * @note To ruby-core: remember that this header can be possibly + * recursively included from extension libraries written in C++. + * Do not expect for instance `__VA_ARGS__` is always available. + * We assume C99 for ruby itself but we don't assume languages of + * extension libraries. They could be written in C++98. + * @brief Defines #RBIMPL_HAS_BUILTIN. + */ +#include "ruby/impl/config.h" +#include "ruby/impl/compiler_since.h" +#include "ruby/impl/token_paste.h" + +#if defined(__has_builtin) +# if RBIMPL_COMPILER_IS(Intel) +# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is +# * reportedly broken. We have to skip them. However the situation can +# * change. They might improve someday. We need to revisit here later. */ +# elif RBIMPL_COMPILER_IS(GCC) && ! __has_builtin(__builtin_alloca) +# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of +# * __has_builtin. Cygwin copied that content to be a victim of the +# * broken-ness. We don't take them into account. */ +# else +# define RBIMPL_HAVE___HAS_BUILTIN 1 +# endif +#endif + +/** Wraps (or simulates) `__has_builtin`. */ +#if defined(RBIMPL_HAVE___HAS_BUILTIN) +# define RBIMPL_HAS_BUILTIN(_) __has_builtin(_) + +#elif RBIMPL_COMPILER_IS(GCC) +# /* :FIXME: Historically GCC has had tons of builtins, but it implemented +# * __has_builtin only since GCC 10. This section can be made more +# * granular. */ +# /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66970 */ +# define RBIMPL_HAS_BUILTIN(_) RBIMPL_TOKEN_PASTE(RBIMPL_HAS_BUILTIN_, _) +# define RBIMPL_HAS_BUILTIN___builtin_add_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0) +# define RBIMPL_HAS_BUILTIN___builtin_alloca RBIMPL_COMPILER_SINCE(GCC, 0, 0, 0) +# define RBIMPL_HAS_BUILTIN___builtin_alloca_with_align RBIMPL_COMPILER_SINCE(GCC, 6, 1, 0) +# /* See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624 for bswap16. */ +# define RBIMPL_HAS_BUILTIN___builtin_bswap16 RBIMPL_COMPILER_SINCE(GCC, 4, 8, 0) +# define RBIMPL_HAS_BUILTIN___builtin_bswap32 RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_bswap64 RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_clz RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_clzl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_clzll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_constant_p RBIMPL_COMPILER_SINCE(GCC, 2,95, 3) +# define RBIMPL_HAS_BUILTIN___builtin_ctz RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_ctzl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_ctzll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_expect RBIMPL_COMPILER_SINCE(GCC, 3, 0, 0) +# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0) +# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow_p RBIMPL_COMPILER_SINCE(GCC, 7, 0, 0) +# define RBIMPL_HAS_BUILTIN___builtin_popcount RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_popcountl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_popcountll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0) +# define RBIMPL_HAS_BUILTIN___builtin_sub_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0) +# define RBIMPL_HAS_BUILTIN___builtin_unreachable RBIMPL_COMPILER_SINCE(GCC, 4, 5, 0) +# /* Note that "0, 0, 0" might be inaccurate. */ + +#elif RBIMPL_COMPILER_IS(MSVC) +# /* MSVC has UNREACHABLE, but that is not __builtin_unreachable. */ +# define RBIMPL_HAS_BUILTIN(_) 0 + +#else +# /* Take config.h definition when available */ +# define RBIMPL_HAS_BUILTIN(_) (RBIMPL_TOKEN_PASTE(RBIMPL_HAS_BUILTIN_, _)+0) +# define RBIMPL_HAS_BUILTIN___builtin_add_overflow HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW +# define RBIMPL_HAS_BUILTIN___builtin_alloca_with_align HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN +# define RBIMPL_HAS_BUILTIN___builtin_assume_aligned HAVE_BUILTIN___BUILTIN_ASSUME_ALIGNED +# define RBIMPL_HAS_BUILTIN___builtin_bswap16 HAVE_BUILTIN___BUILTIN_BSWAP16 +# define RBIMPL_HAS_BUILTIN___builtin_bswap32 HAVE_BUILTIN___BUILTIN_BSWAP32 +# define RBIMPL_HAS_BUILTIN___builtin_bswap64 HAVE_BUILTIN___BUILTIN_BSWAP64 +# define RBIMPL_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ +# define RBIMPL_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL +# define RBIMPL_HAS_BUILTIN___builtin_clzll HAVE_BUILTIN___BUILTIN_CLZLL +# define RBIMPL_HAS_BUILTIN___builtin_constant_p HAVE_BUILTIN___BUILTIN_CONSTANT_P +# define RBIMPL_HAS_BUILTIN___builtin_ctz HAVE_BUILTIN___BUILTIN_CTZ +# define RBIMPL_HAS_BUILTIN___builtin_ctzll HAVE_BUILTIN___BUILTIN_CTZLL +# define RBIMPL_HAS_BUILTIN___builtin_expect HAVE_BUILTIN___BUILTIN_EXPECT +# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW +# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow_p HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P +# define RBIMPL_HAS_BUILTIN___builtin_popcount HAVE_BUILTIN___BUILTIN_POPCOUNT +# define RBIMPL_HAS_BUILTIN___builtin_popcountll HAVE_BUILTIN___BUILTIN_POPCOUNTLL +# define RBIMPL_HAS_BUILTIN___builtin_sub_overflow HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW +# if defined(UNREACHABLE) +# define RBIMPL_HAS_BUILTIN___builtin_unreachable 1 +# endif +#endif + +#endif /* RBIMPL_HAS_BUILTIN_H */ |