diff options
Diffstat (limited to 'lib/lufa/LUFA/Common/CompilerSpecific.h')
| -rw-r--r-- | lib/lufa/LUFA/Common/CompilerSpecific.h | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/lufa/LUFA/Common/CompilerSpecific.h b/lib/lufa/LUFA/Common/CompilerSpecific.h deleted file mode 100644 index 41e5305b1d..0000000000 --- a/lib/lufa/LUFA/Common/CompilerSpecific.h +++ /dev/null @@ -1,97 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaims all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * \brief Compiler specific definitions for code optimization and correctness. - * - * \copydetails Group_CompilerSpecific - * - * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's - * functionality. - */ - -/** \ingroup Group_Common - * \defgroup Group_CompilerSpecific Compiler Specific Definitions - * \brief Compiler specific definitions for code optimization and correctness. - * - * Compiler specific definitions to expose certain compiler features which may increase the level of code optimization - * for a specific compiler, or correct certain issues that may be present such as memory barriers for use in conjunction - * with atomic variable access. - * - * Where possible, on alternative compilers, these macros will either have no effect, or default to returning a sane value - * so that they can be used in existing code without the need for extra compiler checks in the user application code. - * - * @{ - */ - -#ifndef __LUFA_COMPILERSPEC_H__ -#define __LUFA_COMPILERSPEC_H__ - - /* Preprocessor Checks: */ - #if !defined(__INCLUDE_FROM_COMMON_H) - #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality. - #endif - - /* Public Interface - May be used in end-application: */ - /* Macros: */ - #if defined(__GNUC__) || defined(__DOXYGEN__) - /** Forces GCC to use pointer indirection (via the device's pointer register pairs) when accessing the given - * struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through - * a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before - * use, it will force GCC to use pointer indirection on the elements rather than direct store and load - * instructions. - * - * \param[in, out] StructPtr Pointer to a structure which is to be forced into indirect access mode. - */ - #define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr)) - - /** Forces GCC to create a memory barrier, ensuring that memory accesses are not reordered past the barrier point. - * This can be used before ordering-critical operations, to ensure that the compiler does not re-order the resulting - * assembly output in an unexpected manner on sections of code that are ordering-specific. - */ - #define GCC_MEMORY_BARRIER() __asm__ __volatile__("" ::: "memory"); - - /** Determines if the specified value can be determined at compile-time to be a constant value when compiling under GCC. - * - * \param[in] x Value to check compile-time constantness of. - * - * \return Boolean \c true if the given value is known to be a compile time constant, \c false otherwise. - */ - #define GCC_IS_COMPILE_CONST(x) __builtin_constant_p(x) - #else - #define GCC_FORCE_POINTER_ACCESS(StructPtr) - #define GCC_MEMORY_BARRIER() - #define GCC_IS_COMPILE_CONST(x) 0 - #endif - -#endif - -/** @} */ - |