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Revision: 1.40
Committed: Fri Mar 25 14:21:14 2022 UTC (2 years, 2 months ago) by root
Branch: MAIN
Changes since 1.39: +1 -0 lines
Log Message:
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File Contents

# Content
1 TODO: naming of cutnions, index_to_coord, xy_to_s, xy_to_linear/seq, 32/64
2 TODO: returning packed coordinates, really
3 TODO: support order=0?
4 0x0001000c
5 - added ecb_hilbert2d function family.
6 - use __builtin_popcountl on 64 bit clang and gcc.
7
8 0x0001000b
9 - added ecb_gray*_{de,en}code functions.
10
11 0x0001000a
12 - added ecb_ptrmix.
13
14 0x00010009
15 - added ecb_i2a family of functions.
16 - added ECB_64BIT_NATIVE.
17
18 TODO:
19 08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
20 compilers, and like __alignof on MS compilers that support it, see
21 http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
22 08:30:24 <b_jonas> even if you can't support it on all the old compilers
23 08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
24 the MS compiler only has some half-attempt to do something similar but with different and
25 more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
26 08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
27 08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
28 which is something I can do on any compiler portably
29
30 TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
31 #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
32
33 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
34
35 TODO: __builtin_popcountll exists...
36
37 TODO: __builtin_powi
38
39 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
40
41 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
42
43 #ifdef _MSC_VER
44
45 #include <stdlib.h>
46 #define bswap_32(x) _byteswap_ulong(x)
47 #define bswap_64(x) _byteswap_uint64(x)
48
49 #elif defined(__APPLE__)
50
51 // Mac OS X / Darwin features
52 #include <libkern/OSByteOrder.h>
53 #define bswap_32(x) OSSwapInt32(x)
54 #define bswap_64(x) OSSwapInt64(x)
55
56 #elif defined(__sun) || defined(sun)
57
58 #include <sys/byteorder.h>
59 #define bswap_32(x) BSWAP_32(x)
60 #define bswap_64(x) BSWAP_64(x)
61
62 #elif defined(__FreeBSD__)
63
64 #include <sys/endian.h>
65 #define bswap_32(x) bswap32(x)
66 #define bswap_64(x) bswap64(x)
67
68 #elif defined(__OpenBSD__)
69
70 #include <sys/types.h>
71 #define bswap_32(x) swap32(x)
72 #define bswap_64(x) swap64(x)
73
74 #elif defined(__NetBSD__)
75
76 #include <sys/types.h>
77 #include <machine/bswap.h>
78 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
79 #define bswap_32(x) bswap32(x)
80 #define bswap_64(x) bswap64(x)
81 #endif
82
83 #else
84
85 #include <byteswap.h>
86
87 #endif
88
89 TODO: generic poprcount etc., also fast_t for them?
90
91 - allow any rotate count in rcb_rot*, at the expense
92 of bad optimisation results on some platforms or with
93 some word sizes.
94 - try to use inttypes.h on mingw.
95
96 0x00010008
97 - aligned/unaligned load/store, bswap, host order
98 conversion.
99 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
100 ecb_is_pot32 and ecb_bitrev functions.
101
102 0x00010007
103 - new ECB_OPTIMIZE_SIZE symbol.
104
105 0x00010006
106 - new ECB_MEMORY_FENCE_RELAXED memory fence.
107 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
108 - rely on c++ compiler barriers to do the right thing in gcc/clang.
109 - change release memory fence to memory barrier on ia32/ia64.
110 - apply ctz/ld patch for msc by Zsbán Ambrus.
111 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
112 found by Zsbán Ambrus).
113 - improved compiletime detection of endianness, also, allow
114 runtime detection to indicate other-than-big/little endianness.
115 - no memory barrier neded on arm < 6.
116
117 0x00010005
118 - improve ecb_binary16_to_float.
119 - add ecb_float_to_binary16.
120 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
121
122 0x00010001
123 - add ecb_is_pot32/64.
124 - add intptr_t/uintptr_t.
125 - add ECB_PTRSIZE.
126 - more macros for C/C++ version checks.
127 - support C11 atomics for memory fences.
128 - support gcc-4.7 atomics for memory fences.
129 - support m68k, m88k and sh (patch by Miod Vallat).
130 - add ecb_binary16_to_float.
131
132 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
133 TODO: ffs
134 64 bit variants of everything
135 TODO: examples from X for clz/ctz
136 TODO: arithmetic right shift
137 TODO: template/generic functions for x32/x64 and so on
138 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
139 TODO: generalised shift
140 TODO: #define ECB_FAST_UNALIGNED_ACCESS
141 unsigned long gensh(unsigned long v, int x) {
142 int a, b;
143 a = (v << x) & -(((unsigned int)x) < 32);
144 x = -x;
145 b = (v >> x) & -(((unsigned int)x) < 32);
146 return a|b;
147 }
148
149 TODO: export(=dllexport) & hidden
150 TODO: flatten
151 TODO: warning(msg)
152 TODO: error(msg)
153 TODO: leaf (uh), noclone (hmmm)
154 TODO: nonnull, returns_nonnull
155 TODO: nothrow
156 TODO: used
157 TODO: trap
158 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
159
160 TODO: read/write unaligned macros
161 TODO: htonl and friends
162 TODO: macro to convert from unsigned to signed "the natural way"
163 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
164 TODO: alignof
165
166