Crypto++ 8.2 Free C++ class library of cryptographic schemes

config_align.h
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1 // config_align.h - written and placed in public domain by Jeffrey Walton
2 // the bits that make up this source file are from the
3 // library's monolithic config.h.
4
5 /// \file config_align.h
6 /// \brief Library configuration file
7 /// \details <tt>config.h</tt> was split into components in May 2019 to better
8 /// integrate with Autoconf and its feature tests. The splitting occurred so
9 /// users could continue to include <tt>config.h</tt> while allowing Autoconf
10 /// to write new <tt>config_asm.h</tt> and new <tt>config_cxx.h</tt> using
11 /// its feature tests.
12 /// \sa <A HREF="https://github.com/weidai11/cryptopp/issues/835">Issue 835</A>
13 /// \since Crypto++ 8.3
14
15 #ifndef CRYPTOPP_CONFIG_ALIGN_H
16 #define CRYPTOPP_CONFIG_ALIGN_H
17
18 #include "config_asm.h" // CRYPTOPP_DISABLE_ASM
19 #include "config_cpu.h" // X86, X32, X64, ARM32, ARM64, etc
20 #include "config_cxx.h" // CRYPTOPP_CXX11_ALIGNAS
21 #include "config_ver.h" // Compiler versions
22
23 // Nearly all Intel's and AMD's have SSE. Enable it independent of SSE ASM and intrinsics.
24 // ARM NEON and ARMv8 ASIMD only need natural alignment of an element in the vector.
25 // Altivec through POWER7 need vector alignment. POWER8 and POWER9 relax the requirement.
26 #if defined(CRYPTOPP_DISABLE_ASM)
27 #define CRYPTOPP_BOOL_ALIGN16 0
28 #elif (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64 || \
29 CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
30 #define CRYPTOPP_BOOL_ALIGN16 1
31 #else
32 #define CRYPTOPP_BOOL_ALIGN16 0
33 #endif
34
35 // How to allocate 16-byte aligned memory (for SSE2)
36 // posix_memalign see https://forum.kde.org/viewtopic.php?p=66274
37 #if defined(_MSC_VER)
38 #define CRYPTOPP_MM_MALLOC_AVAILABLE
39 #elif defined(__linux__) || defined(__sun__) || defined(__CYGWIN__)
40 #define CRYPTOPP_MEMALIGN_AVAILABLE
41 #elif defined(__APPLE__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
42 #define CRYPTOPP_MALLOC_ALIGNMENT_IS_16
43 #elif (defined(_GNU_SOURCE) || ((_XOPEN_SOURCE + 0) >= 600)) && (_POSIX_ADVISORY_INFO > 0)
44 #define CRYPTOPP_POSIX_MEMALIGN_AVAILABLE
45 #else
46 #define CRYPTOPP_NO_ALIGNED_ALLOC
47 #endif
48
49 // Sun Studio Express 3 (December 2006) provides GCC-style attributes.
50 // IBM XL C/C++ alignment modifier per Optimization Guide, pp. 19-20.
51 // __IBM_ATTRIBUTES per XLC 12.1 AIX Compiler Manual, p. 473.
52 // CRYPTOPP_ALIGN_DATA may not be reliable on AIX.
53 #if defined(CRYPTOPP_CXX11_ALIGNAS)
54 #define CRYPTOPP_ALIGN_DATA(x) alignas(x)
55 #elif defined(_MSC_VER)
56 #define CRYPTOPP_ALIGN_DATA(x) __declspec(align(x))
57 #elif defined(__GNUC__) || defined(__clang__) || (__SUNPRO_CC >= 0x5100)
58 #define CRYPTOPP_ALIGN_DATA(x) __attribute__((aligned(x)))
59 #elif defined(__xlc__) || defined(__xlC__)
60 #define CRYPTOPP_ALIGN_DATA(x) __attribute__((aligned(x)))
61 #else
62 #define CRYPTOPP_ALIGN_DATA(x)
63 #endif
64
65 #endif // CRYPTOPP_CONFIG_ALIGN_H
config_asm.h
Library configuration file.
config_cpu.h
Library configuration file.
config_cxx.h
Library configuration file.
config_ver.h
Library configuration file.