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Diffstat (limited to 'firmware/include/gcc_extensions.h')
-rw-r--r-- | firmware/include/gcc_extensions.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/firmware/include/gcc_extensions.h b/firmware/include/gcc_extensions.h new file mode 100644 index 0000000000..a58c2e7e45 --- /dev/null +++ b/firmware/include/gcc_extensions.h @@ -0,0 +1,46 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * + * Copyright © 2010 Rafaël Carré + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#ifndef _GCC_EXTENSIONS_H_ +#define _GCC_EXTENSIONS_H_ + +/* Support for some GCC extensions */ + +/* Compile time check of format for printf/scanf like functions */ +#ifdef __GNUC__ +#define ATTRIBUTE_PRINTF(fmt, arg1) __attribute__( ( format( printf, fmt, arg1 ) ) ) +#define ATTRIBUTE_SCANF(fmt, arg1) __attribute__( ( format( scanf, fmt, arg1 ) ) ) +#else +#define ATTRIBUTE_PRINTF(fmt, arg1) +#define ATTRIBUTE_SCANF(fmt, arg1) +#endif + + +/* Use to give gcc hints on which branch is most likely taken */ +#if defined(__GNUC__) && __GNUC__ >= 3 +#define LIKELY(x) __builtin_expect(!!(x), 1) +#define UNLIKELY(x) __builtin_expect(!!(x), 0) +#else +#define LIKELY(x) (x) +#define UNLIKELY(x) (x) +#endif + + +#endif /* _GCC_EXTENSIONS_H_ */ |