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65 lines
2.8 KiB
65 lines
2.8 KiB
// config_align.h - written and placed in public domain by Jeffrey Walton |
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// the bits that make up this source file are from the |
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// library's monolithic config.h. |
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/// \file config_align.h |
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/// \brief Library configuration file |
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/// \details <tt>config.h</tt> was split into components in May 2019 to better |
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/// integrate with Autoconf and its feature tests. The splitting occured so |
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/// users could continue to include <tt>config.h</tt> while allowing Autoconf |
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/// to write new <tt>config_asm.h</tt> and new <tt>config_cxx.h</tt> using |
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/// its feature tests. |
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/// \sa <A HREF="https://github.com/weidai11/cryptopp/issues/835">Issue 835</A> |
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/// \since Crypto++ 8.3 |
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#ifndef CRYPTOPP_CONFIG_ALIGN_H |
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#define CRYPTOPP_CONFIG_ALIGN_H |
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#include "config_asm.h" // CRYPTOPP_DISABLE_ASM |
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#include "config_cpu.h" // X86, X32, X64, ARM32, ARM64, etc |
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#include "config_cxx.h" // CRYPTOPP_CXX11_ALIGNAS |
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#include "config_ver.h" // Compiler versions |
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// Nearly all Intel's and AMD's have SSE. Enable it independent of SSE ASM and intrinscs. |
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// ARM NEON and ARMv8 ASIMD only need natural alignment of an element in the vector. |
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// Altivec through POWER7 need vector alignment. POWER8 and POWER9 relax the requirement. |
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#if defined(CRYPTOPP_DISABLE_ASM) |
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#define CRYPTOPP_BOOL_ALIGN16 0 |
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#elif (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64 || \ |
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CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64) |
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#define CRYPTOPP_BOOL_ALIGN16 1 |
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#else |
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#define CRYPTOPP_BOOL_ALIGN16 0 |
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#endif |
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// How to allocate 16-byte aligned memory (for SSE2) |
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// posix_memalign see https://forum.kde.org/viewtopic.php?p=66274 |
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#if defined(_MSC_VER) |
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#define CRYPTOPP_MM_MALLOC_AVAILABLE |
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#elif defined(__linux__) || defined(__sun__) || defined(__CYGWIN__) |
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#define CRYPTOPP_MEMALIGN_AVAILABLE |
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#elif defined(__APPLE__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) |
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#define CRYPTOPP_MALLOC_ALIGNMENT_IS_16 |
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#elif (defined(_GNU_SOURCE) || ((_XOPEN_SOURCE + 0) >= 600)) && (_POSIX_ADVISORY_INFO > 0) |
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#define CRYPTOPP_POSIX_MEMALIGN_AVAILABLE |
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#else |
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#define CRYPTOPP_NO_ALIGNED_ALLOC |
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#endif |
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// Sun Studio Express 3 (December 2006) provides GCC-style attributes. |
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// IBM XL C/C++ alignment modifier per Optimization Guide, pp. 19-20. |
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// __IBM_ATTRIBUTES per XLC 12.1 AIX Compiler Manual, p. 473. |
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// CRYPTOPP_ALIGN_DATA may not be reliable on AIX. |
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#if defined(CRYPTOPP_CXX11_ALIGNAS) |
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#define CRYPTOPP_ALIGN_DATA(x) alignas(x) |
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#elif defined(_MSC_VER) |
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#define CRYPTOPP_ALIGN_DATA(x) __declspec(align(x)) |
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#elif defined(__GNUC__) || defined(__clang__) || (__SUNPRO_CC >= 0x5100) |
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#define CRYPTOPP_ALIGN_DATA(x) __attribute__((aligned(x))) |
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#elif defined(__xlc__) || defined(__xlC__) |
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#define CRYPTOPP_ALIGN_DATA(x) __attribute__((aligned(x))) |
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#else |
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#define CRYPTOPP_ALIGN_DATA(x) |
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#endif |
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#endif // CRYPTOPP_CONFIG_ALIGN_H
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