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Revision: 1.44
Committed: Fri Mar 25 15:30:02 2022 UTC (2 years, 2 months ago) by root
Branch: MAIN
Changes since 1.43: +1 -0 lines
Log Message:
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# 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 - use 64 bit builtins, not 128 bit builtins, for ctz/clz on 64 bit cpus.
8 - add ecb_clz* functions,
9 - renamed ecb_gray* functions to have trailing bit width.
10 - use ecb_function_ consistently for newly added functions.
11
12 0x0001000b
13 - added ecb_gray*_{de,en}code functions.
14
15 0x0001000a
16 - added ecb_ptrmix.
17
18 0x00010009
19 - added ecb_i2a family of functions.
20 - added ECB_64BIT_NATIVE.
21
22 TODO:
23 08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
24 compilers, and like __alignof on MS compilers that support it, see
25 http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
26 08:30:24 <b_jonas> even if you can't support it on all the old compilers
27 08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
28 the MS compiler only has some half-attempt to do something similar but with different and
29 more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
30 08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
31 08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
32 which is something I can do on any compiler portably
33
34 TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
35 #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
36
37 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
38
39 TODO: __builtin_popcountll exists...
40
41 TODO: __builtin_powi
42
43 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
44
45 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
46
47 #ifdef _MSC_VER
48
49 #include <stdlib.h>
50 #define bswap_32(x) _byteswap_ulong(x)
51 #define bswap_64(x) _byteswap_uint64(x)
52
53 #elif defined(__APPLE__)
54
55 // Mac OS X / Darwin features
56 #include <libkern/OSByteOrder.h>
57 #define bswap_32(x) OSSwapInt32(x)
58 #define bswap_64(x) OSSwapInt64(x)
59
60 #elif defined(__sun) || defined(sun)
61
62 #include <sys/byteorder.h>
63 #define bswap_32(x) BSWAP_32(x)
64 #define bswap_64(x) BSWAP_64(x)
65
66 #elif defined(__FreeBSD__)
67
68 #include <sys/endian.h>
69 #define bswap_32(x) bswap32(x)
70 #define bswap_64(x) bswap64(x)
71
72 #elif defined(__OpenBSD__)
73
74 #include <sys/types.h>
75 #define bswap_32(x) swap32(x)
76 #define bswap_64(x) swap64(x)
77
78 #elif defined(__NetBSD__)
79
80 #include <sys/types.h>
81 #include <machine/bswap.h>
82 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
83 #define bswap_32(x) bswap32(x)
84 #define bswap_64(x) bswap64(x)
85 #endif
86
87 #else
88
89 #include <byteswap.h>
90
91 #endif
92
93 TODO: generic poprcount etc., also fast_t for them?
94
95 - allow any rotate count in rcb_rot*, at the expense
96 of bad optimisation results on some platforms or with
97 some word sizes.
98 - try to use inttypes.h on mingw.
99
100 0x00010008
101 - aligned/unaligned load/store, bswap, host order
102 conversion.
103 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
104 ecb_is_pot32 and ecb_bitrev functions.
105
106 0x00010007
107 - new ECB_OPTIMIZE_SIZE symbol.
108
109 0x00010006
110 - new ECB_MEMORY_FENCE_RELAXED memory fence.
111 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
112 - rely on c++ compiler barriers to do the right thing in gcc/clang.
113 - change release memory fence to memory barrier on ia32/ia64.
114 - apply ctz/ld patch for msc by Zsbán Ambrus.
115 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
116 found by Zsbán Ambrus).
117 - improved compiletime detection of endianness, also, allow
118 runtime detection to indicate other-than-big/little endianness.
119 - no memory barrier neded on arm < 6.
120
121 0x00010005
122 - improve ecb_binary16_to_float.
123 - add ecb_float_to_binary16.
124 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
125
126 0x00010001
127 - add ecb_is_pot32/64.
128 - add intptr_t/uintptr_t.
129 - add ECB_PTRSIZE.
130 - more macros for C/C++ version checks.
131 - support C11 atomics for memory fences.
132 - support gcc-4.7 atomics for memory fences.
133 - support m68k, m88k and sh (patch by Miod Vallat).
134 - add ecb_binary16_to_float.
135
136 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
137 TODO: ffs
138 64 bit variants of everything
139 TODO: examples from X for clz/ctz
140 TODO: arithmetic right shift
141 TODO: template/generic functions for x32/x64 and so on
142 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
143 TODO: generalised shift
144 TODO: #define ECB_FAST_UNALIGNED_ACCESS
145 unsigned long gensh(unsigned long v, int x) {
146 int a, b;
147 a = (v << x) & -(((unsigned int)x) < 32);
148 x = -x;
149 b = (v >> x) & -(((unsigned int)x) < 32);
150 return a|b;
151 }
152
153 TODO: export(=dllexport) & hidden
154 TODO: flatten
155 TODO: warning(msg)
156 TODO: error(msg)
157 TODO: leaf (uh), noclone (hmmm)
158 TODO: nonnull, returns_nonnull
159 TODO: nothrow
160 TODO: used
161 TODO: trap
162 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
163
164 TODO: read/write unaligned macros
165 TODO: htonl and friends
166 TODO: macro to convert from unsigned to signed "the natural way"
167 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
168 TODO: alignof
169
170