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Revision: 1.28
Committed: Mon Jun 24 22:22:59 2019 UTC (4 years, 11 months ago) by root
Branch: MAIN
Changes since 1.27: +10 -0 lines
Log Message:
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File Contents

# Content
1 TODO:
2 08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
3 compilers, and like __alignof on MS compilers that support it, see
4 http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
5 08:30:24 <b_jonas> even if you can't support it on all the old compilers
6 08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
7 the MS compiler only has some half-attempt to do something similar but with different and
8 more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
9 08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
10 08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
11 which is something I can do on any compiler portably
12
13 TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
14 #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
15
16 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
17
18 TODO: __builtin_popcountll exists...
19
20 TODO: unaligned access
21
22 TODO: __builtin_powi
23
24 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
25
26 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
27
28 #ifdef _MSC_VER
29
30 #include <stdlib.h>
31 #define bswap_32(x) _byteswap_ulong(x)
32 #define bswap_64(x) _byteswap_uint64(x)
33
34 #elif defined(__APPLE__)
35
36 // Mac OS X / Darwin features
37 #include <libkern/OSByteOrder.h>
38 #define bswap_32(x) OSSwapInt32(x)
39 #define bswap_64(x) OSSwapInt64(x)
40
41 #elif defined(__sun) || defined(sun)
42
43 #include <sys/byteorder.h>
44 #define bswap_32(x) BSWAP_32(x)
45 #define bswap_64(x) BSWAP_64(x)
46
47 #elif defined(__FreeBSD__)
48
49 #include <sys/endian.h>
50 #define bswap_32(x) bswap32(x)
51 #define bswap_64(x) bswap64(x)
52
53 #elif defined(__OpenBSD__)
54
55 #include <sys/types.h>
56 #define bswap_32(x) swap32(x)
57 #define bswap_64(x) swap64(x)
58
59 #elif defined(__NetBSD__)
60
61 #include <sys/types.h>
62 #include <machine/bswap.h>
63 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
64 #define bswap_32(x) bswap32(x)
65 #define bswap_64(x) bswap64(x)
66 #endif
67
68 #else
69
70 #include <byteswap.h>
71
72 #endif
73
74 0x00010006
75 - new ECB_MEMORXY_FENCE_RELAXED memory fence.
76 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
77 - rely on c++ compiler barriers to do the right thing in gcc/clang.
78 - change release memory fence to memory barrier on ia32/ia64.
79 - apply ctz/ld patch for msc by Zsbán Ambrus.
80 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
81 found by Zsbán Ambrus).
82 - improved compiletime detection of endianness, also, allow
83 runtime detection to indicate other-than-big/little endianness.
84 - no memory barrier neded on arm < 6.
85
86 0x00010005
87 - improve ecb_binary16_to_float.
88 - add ecb_float_to_binary16.
89 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
90
91 0x00010001
92 - add ecb_is_pot32/64.
93 - add intptr_t/uintptr_t.
94 - add ECB_PTRSIZE.
95 - more macros for C/C++ version checks.
96 - support C11 atomics for memory fences.
97 - support gcc-4.7 atomics for memory fences.
98 - support m68k, m88k and sh (patch by Miod Vallat).
99 - add ecb_binary16_to_float.
100
101 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
102 TODO: ffs
103 64 bit variants of everything
104 TODO: examples from X for clz/ctz
105 TODO: arithmetic right shift
106 TODO: template/generic functions for x32/x64 and so on
107 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
108 TODO: generalised shift
109 TODO: #define ECB_FAST_UNALIGNED_ACCESS
110 unsigned long gensh(unsigned long v, int x) {
111 int a, b;
112 a = (v << x) & -(((unsigned int)x) < 32);
113 x = -x;
114 b = (v >> x) & -(((unsigned int)x) < 32);
115 return a|b;
116 }
117
118 TODO: export(=dllexport) & hidden
119 TODO: flatten
120 TODO: warning(msg)
121 TODO: error(msg)
122 TODO: leaf (uh), noclone (hmmm)
123 TODO: nonnull, returns_nonnull
124 TODO: nothrow
125 TODO: used
126 TODO: trap
127 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
128
129 TODO: read/write unaligned macros
130 TODO: htonl and friends
131 TODO: macro to convert from unsigned to signed "the natural way"
132 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
133 TODO: alignof
134
135