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#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/internal/config.h" #include "ruby/internal/compiler_since.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_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) # define RBIMPL_HAS_BUILTIN___builtin_assume 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) #ifndef __OpenBSD__ # 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) #endif # 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_rotateleft32 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateleft64 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateright32 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateright64 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. */ #else # /* Take config.h definition when available */ # define RBIMPL_HAS_BUILTIN(_) ((RBIMPL_HAS_BUILTIN_ ## _)+0) # define RBIMPL_HAS_BUILTIN___builtin_add_overflow HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW # define RBIMPL_HAS_BUILTIN___builtin_alloca 0 # define RBIMPL_HAS_BUILTIN___builtin_alloca_with_align HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN # define RBIMPL_HAS_BUILTIN___builtin_assume 0 # 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_ctzl 0 # 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_popcountl 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateleft32 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateleft64 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateright32 0 # define RBIMPL_HAS_BUILTIN___builtin_rotateright64 0 # define RBIMPL_HAS_BUILTIN___builtin_popcountll HAVE_BUILTIN___BUILTIN_POPCOUNTLL # define RBIMPL_HAS_BUILTIN___builtin_sub_overflow HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW # if defined(HAVE___BUILTIN_UNREACHABLE) # define RBIMPL_HAS_BUILTIN___builtin_unreachable 1 # else # define RBIMPL_HAS_BUILTIN___builtin_unreachable 0 # endif #endif #endif /* RBIMPL_HAS_BUILTIN_H */