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TODO: |
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08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane |
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compilers, and like __alignof on MS compilers that support it, see |
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http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx |
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08:30:24 <b_jonas> even if you can't support it on all the old compilers |
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08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because |
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the MS compiler only has some half-attempt to do something similar but with different and |
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more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx |
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08:31:35 <b_jonas> but I wonder if some special case could still be worth to support |
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08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type, |
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which is something I can do on any compiler portably |
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TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2) |
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#define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL)) |
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TODO: ecb_minpot, either using bit tricks or ecb_ldXX |
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TODO: __builtin_popcountll exists... |
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TODO: __builtin_powi |
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TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/ |
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implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/ |
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#ifdef _MSC_VER |
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|
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#include <stdlib.h> |
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#define bswap_32(x) _byteswap_ulong(x) |
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#define bswap_64(x) _byteswap_uint64(x) |
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#elif defined(__APPLE__) |
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// Mac OS X / Darwin features |
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#include <libkern/OSByteOrder.h> |
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#define bswap_32(x) OSSwapInt32(x) |
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#define bswap_64(x) OSSwapInt64(x) |
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#elif defined(__sun) || defined(sun) |
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#include <sys/byteorder.h> |
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#define bswap_32(x) BSWAP_32(x) |
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#define bswap_64(x) BSWAP_64(x) |
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#elif defined(__FreeBSD__) |
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#include <sys/endian.h> |
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#define bswap_32(x) bswap32(x) |
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#define bswap_64(x) bswap64(x) |
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#elif defined(__OpenBSD__) |
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#include <sys/types.h> |
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#define bswap_32(x) swap32(x) |
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#define bswap_64(x) swap64(x) |
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#elif defined(__NetBSD__) |
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#include <sys/types.h> |
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#include <machine/bswap.h> |
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#if defined(__BSWAP_RENAME) && !defined(__bswap_32) |
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#define bswap_32(x) bswap32(x) |
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#define bswap_64(x) bswap64(x) |
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#endif |
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#else |
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#include <byteswap.h> |
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#endif |
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TODO: generic poprcount etc., also fast_t for them? |
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- try to use inttypes.h on mingw. |
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0x00010008 |
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- aligned/unaligned load/store, bswap, host order |
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conversion. |
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- generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz, |
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ecb_is_pot32 and ecb_bitrev functions. |
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|
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0x00010007 |
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- new ECB_OPTIMIZE_SIZE symbol. |
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0x00010006 |
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- new ECB_MEMORY_FENCE_RELAXED memory fence. |
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- use acquire/eelease memory barriers on sun workshop pro, not read/write. |
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- rely on c++ compiler barriers to do the right thing in gcc/clang. |
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- change release memory fence to memory barrier on ia32/ia64. |
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- apply ctz/ld patch for msc by Zsbán Ambrus. |
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- ECB_PTRSIZE erroneously was 8 on most 32bit systems ( |
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found by Zsbán Ambrus). |
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- improved compiletime detection of endianness, also, allow |
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runtime detection to indicate other-than-big/little endianness. |
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- no memory barrier neded on arm < 6. |
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0x00010005 |
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- improve ecb_binary16_to_float. |
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- add ecb_float_to_binary16. |
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- add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair. |
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0x00010001 |
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- add ecb_is_pot32/64. |
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- add intptr_t/uintptr_t. |
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- add ECB_PTRSIZE. |
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- more macros for C/C++ version checks. |
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- support C11 atomics for memory fences. |
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- support gcc-4.7 atomics for memory fences. |
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- support m68k, m88k and sh (patch by Miod Vallat). |
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- add ecb_binary16_to_float. |
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TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt |
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TODO: ffs |
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64 bit variants of everything |
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TODO: examples from X for clz/ctz |
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TODO: arithmetic right shift |
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TODO: template/generic functions for x32/x64 and so on |
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TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0) |
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TODO: generalised shift |
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TODO: #define ECB_FAST_UNALIGNED_ACCESS |
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unsigned long gensh(unsigned long v, int x) { |
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int a, b; |
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a = (v << x) & -(((unsigned int)x) < 32); |
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x = -x; |
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b = (v >> x) & -(((unsigned int)x) < 32); |
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return a|b; |
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} |
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TODO: export(=dllexport) & hidden |
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TODO: flatten |
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TODO: warning(msg) |
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TODO: error(msg) |
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TODO: leaf (uh), noclone (hmmm) |
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TODO: nonnull, returns_nonnull |
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TODO: nothrow |
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TODO: used |
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TODO: trap |
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TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html |
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TODO: read/write unaligned macros |
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TODO: htonl and friends |
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TODO: macro to convert from unsigned to signed "the natural way" |
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TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration |
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TODO: alignof |
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