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Revision: 1.33
Committed: Sat Jan 25 19:34:52 2020 UTC (4 years, 4 months ago) by root
Branch: MAIN
Changes since 1.32: +3 -0 lines
Log Message:
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# 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: __builtin_powi
21
22 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
23
24 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
25
26 #ifdef _MSC_VER
27
28 #include <stdlib.h>
29 #define bswap_32(x) _byteswap_ulong(x)
30 #define bswap_64(x) _byteswap_uint64(x)
31
32 #elif defined(__APPLE__)
33
34 // Mac OS X / Darwin features
35 #include <libkern/OSByteOrder.h>
36 #define bswap_32(x) OSSwapInt32(x)
37 #define bswap_64(x) OSSwapInt64(x)
38
39 #elif defined(__sun) || defined(sun)
40
41 #include <sys/byteorder.h>
42 #define bswap_32(x) BSWAP_32(x)
43 #define bswap_64(x) BSWAP_64(x)
44
45 #elif defined(__FreeBSD__)
46
47 #include <sys/endian.h>
48 #define bswap_32(x) bswap32(x)
49 #define bswap_64(x) bswap64(x)
50
51 #elif defined(__OpenBSD__)
52
53 #include <sys/types.h>
54 #define bswap_32(x) swap32(x)
55 #define bswap_64(x) swap64(x)
56
57 #elif defined(__NetBSD__)
58
59 #include <sys/types.h>
60 #include <machine/bswap.h>
61 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
62 #define bswap_32(x) bswap32(x)
63 #define bswap_64(x) bswap64(x)
64 #endif
65
66 #else
67
68 #include <byteswap.h>
69
70 #endif
71
72 TODO: generic poprcount etc., also fast_t for them?
73
74 - try to use inttypes.h on mingw.
75
76 0x00010008
77 - aligned/unaligned load/store, bswap, host order
78 conversion.
79 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
80 ecb_is_pot32 and ecb_bitrev functions.
81
82 0x00010007
83 - new ECB_OPTIMIZE_SIZE symbol.
84
85 0x00010006
86 - new ECB_MEMORY_FENCE_RELAXED memory fence.
87 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
88 - rely on c++ compiler barriers to do the right thing in gcc/clang.
89 - change release memory fence to memory barrier on ia32/ia64.
90 - apply ctz/ld patch for msc by Zsbán Ambrus.
91 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
92 found by Zsbán Ambrus).
93 - improved compiletime detection of endianness, also, allow
94 runtime detection to indicate other-than-big/little endianness.
95 - no memory barrier neded on arm < 6.
96
97 0x00010005
98 - improve ecb_binary16_to_float.
99 - add ecb_float_to_binary16.
100 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
101
102 0x00010001
103 - add ecb_is_pot32/64.
104 - add intptr_t/uintptr_t.
105 - add ECB_PTRSIZE.
106 - more macros for C/C++ version checks.
107 - support C11 atomics for memory fences.
108 - support gcc-4.7 atomics for memory fences.
109 - support m68k, m88k and sh (patch by Miod Vallat).
110 - add ecb_binary16_to_float.
111
112 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
113 TODO: ffs
114 64 bit variants of everything
115 TODO: examples from X for clz/ctz
116 TODO: arithmetic right shift
117 TODO: template/generic functions for x32/x64 and so on
118 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
119 TODO: generalised shift
120 TODO: #define ECB_FAST_UNALIGNED_ACCESS
121 unsigned long gensh(unsigned long v, int x) {
122 int a, b;
123 a = (v << x) & -(((unsigned int)x) < 32);
124 x = -x;
125 b = (v >> x) & -(((unsigned int)x) < 32);
126 return a|b;
127 }
128
129 TODO: export(=dllexport) & hidden
130 TODO: flatten
131 TODO: warning(msg)
132 TODO: error(msg)
133 TODO: leaf (uh), noclone (hmmm)
134 TODO: nonnull, returns_nonnull
135 TODO: nothrow
136 TODO: used
137 TODO: trap
138 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
139
140 TODO: read/write unaligned macros
141 TODO: htonl and friends
142 TODO: macro to convert from unsigned to signed "the natural way"
143 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
144 TODO: alignof
145
146