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Revision: 1.43
Committed: Fri Mar 25 15:28:08 2022 UTC (2 years, 2 months ago) by root
Branch: MAIN
Changes since 1.42: +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 - 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
11 0x0001000b
12 - added ecb_gray*_{de,en}code functions.
13
14 0x0001000a
15 - added ecb_ptrmix.
16
17 0x00010009
18 - added ecb_i2a family of functions.
19 - added ECB_64BIT_NATIVE.
20
21 TODO:
22 08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
23 compilers, and like __alignof on MS compilers that support it, see
24 http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
25 08:30:24 <b_jonas> even if you can't support it on all the old compilers
26 08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
27 the MS compiler only has some half-attempt to do something similar but with different and
28 more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
29 08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
30 08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
31 which is something I can do on any compiler portably
32
33 TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
34 #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
35
36 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
37
38 TODO: __builtin_popcountll exists...
39
40 TODO: __builtin_powi
41
42 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
43
44 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
45
46 #ifdef _MSC_VER
47
48 #include <stdlib.h>
49 #define bswap_32(x) _byteswap_ulong(x)
50 #define bswap_64(x) _byteswap_uint64(x)
51
52 #elif defined(__APPLE__)
53
54 // Mac OS X / Darwin features
55 #include <libkern/OSByteOrder.h>
56 #define bswap_32(x) OSSwapInt32(x)
57 #define bswap_64(x) OSSwapInt64(x)
58
59 #elif defined(__sun) || defined(sun)
60
61 #include <sys/byteorder.h>
62 #define bswap_32(x) BSWAP_32(x)
63 #define bswap_64(x) BSWAP_64(x)
64
65 #elif defined(__FreeBSD__)
66
67 #include <sys/endian.h>
68 #define bswap_32(x) bswap32(x)
69 #define bswap_64(x) bswap64(x)
70
71 #elif defined(__OpenBSD__)
72
73 #include <sys/types.h>
74 #define bswap_32(x) swap32(x)
75 #define bswap_64(x) swap64(x)
76
77 #elif defined(__NetBSD__)
78
79 #include <sys/types.h>
80 #include <machine/bswap.h>
81 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
82 #define bswap_32(x) bswap32(x)
83 #define bswap_64(x) bswap64(x)
84 #endif
85
86 #else
87
88 #include <byteswap.h>
89
90 #endif
91
92 TODO: generic poprcount etc., also fast_t for them?
93
94 - allow any rotate count in rcb_rot*, at the expense
95 of bad optimisation results on some platforms or with
96 some word sizes.
97 - try to use inttypes.h on mingw.
98
99 0x00010008
100 - aligned/unaligned load/store, bswap, host order
101 conversion.
102 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
103 ecb_is_pot32 and ecb_bitrev functions.
104
105 0x00010007
106 - new ECB_OPTIMIZE_SIZE symbol.
107
108 0x00010006
109 - new ECB_MEMORY_FENCE_RELAXED memory fence.
110 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
111 - rely on c++ compiler barriers to do the right thing in gcc/clang.
112 - change release memory fence to memory barrier on ia32/ia64.
113 - apply ctz/ld patch for msc by Zsbán Ambrus.
114 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
115 found by Zsbán Ambrus).
116 - improved compiletime detection of endianness, also, allow
117 runtime detection to indicate other-than-big/little endianness.
118 - no memory barrier neded on arm < 6.
119
120 0x00010005
121 - improve ecb_binary16_to_float.
122 - add ecb_float_to_binary16.
123 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
124
125 0x00010001
126 - add ecb_is_pot32/64.
127 - add intptr_t/uintptr_t.
128 - add ECB_PTRSIZE.
129 - more macros for C/C++ version checks.
130 - support C11 atomics for memory fences.
131 - support gcc-4.7 atomics for memory fences.
132 - support m68k, m88k and sh (patch by Miod Vallat).
133 - add ecb_binary16_to_float.
134
135 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
136 TODO: ffs
137 64 bit variants of everything
138 TODO: examples from X for clz/ctz
139 TODO: arithmetic right shift
140 TODO: template/generic functions for x32/x64 and so on
141 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
142 TODO: generalised shift
143 TODO: #define ECB_FAST_UNALIGNED_ACCESS
144 unsigned long gensh(unsigned long v, int x) {
145 int a, b;
146 a = (v << x) & -(((unsigned int)x) < 32);
147 x = -x;
148 b = (v >> x) & -(((unsigned int)x) < 32);
149 return a|b;
150 }
151
152 TODO: export(=dllexport) & hidden
153 TODO: flatten
154 TODO: warning(msg)
155 TODO: error(msg)
156 TODO: leaf (uh), noclone (hmmm)
157 TODO: nonnull, returns_nonnull
158 TODO: nothrow
159 TODO: used
160 TODO: trap
161 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
162
163 TODO: read/write unaligned macros
164 TODO: htonl and friends
165 TODO: macro to convert from unsigned to signed "the natural way"
166 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
167 TODO: alignof
168
169