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Revision: 1.42
Committed: Fri Mar 25 15:22:17 2022 UTC (2 years, 2 months ago) by root
Branch: MAIN
Changes since 1.41: +1 -0 lines
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File Contents

# User Rev Content
1 root 1.39 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 root 1.40 - use __builtin_popcountl on 64 bit clang and gcc.
7 root 1.41 - use 64 bit builtins, not 128 bit builtins, for ctz/clz on 64 bit cpus.
8 root 1.42 - add ecb_clz* functions,
9 root 1.39
10 root 1.38 0x0001000b
11     - added ecb_gray*_{de,en}code functions.
12    
13 root 1.37 0x0001000a
14     - added ecb_ptrmix.
15    
16 root 1.34 0x00010009
17 root 1.35 - added ecb_i2a family of functions.
18 root 1.34 - added ECB_64BIT_NATIVE.
19    
20 root 1.15 TODO:
21     08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
22     compilers, and like __alignof on MS compilers that support it, see
23     http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
24     08:30:24 <b_jonas> even if you can't support it on all the old compilers
25     08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
26     the MS compiler only has some half-attempt to do something similar but with different and
27     more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
28     08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
29     08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
30     which is something I can do on any compiler portably
31    
32     TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
33     #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
34    
35 root 1.28 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
36    
37     TODO: __builtin_popcountll exists...
38    
39 root 1.26 TODO: __builtin_powi
40    
41 root 1.15 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
42    
43 root 1.13 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
44 root 1.12
45     #ifdef _MSC_VER
46    
47     #include <stdlib.h>
48     #define bswap_32(x) _byteswap_ulong(x)
49     #define bswap_64(x) _byteswap_uint64(x)
50    
51     #elif defined(__APPLE__)
52    
53     // Mac OS X / Darwin features
54     #include <libkern/OSByteOrder.h>
55     #define bswap_32(x) OSSwapInt32(x)
56     #define bswap_64(x) OSSwapInt64(x)
57    
58     #elif defined(__sun) || defined(sun)
59    
60     #include <sys/byteorder.h>
61     #define bswap_32(x) BSWAP_32(x)
62     #define bswap_64(x) BSWAP_64(x)
63    
64     #elif defined(__FreeBSD__)
65    
66     #include <sys/endian.h>
67     #define bswap_32(x) bswap32(x)
68     #define bswap_64(x) bswap64(x)
69    
70     #elif defined(__OpenBSD__)
71    
72     #include <sys/types.h>
73     #define bswap_32(x) swap32(x)
74     #define bswap_64(x) swap64(x)
75    
76     #elif defined(__NetBSD__)
77    
78     #include <sys/types.h>
79     #include <machine/bswap.h>
80     #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
81     #define bswap_32(x) bswap32(x)
82     #define bswap_64(x) bswap64(x)
83     #endif
84    
85     #else
86    
87     #include <byteswap.h>
88    
89     #endif
90    
91 root 1.32 TODO: generic poprcount etc., also fast_t for them?
92 root 1.33
93 root 1.36 - allow any rotate count in rcb_rot*, at the expense
94     of bad optimisation results on some platforms or with
95     some word sizes.
96 root 1.33 - try to use inttypes.h on mingw.
97    
98 root 1.30 0x00010008
99     - aligned/unaligned load/store, bswap, host order
100     conversion.
101 root 1.32 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
102     ecb_is_pot32 and ecb_bitrev functions.
103 root 1.30
104 root 1.29 0x00010007
105     - new ECB_OPTIMIZE_SIZE symbol.
106    
107 root 1.28 0x00010006
108 root 1.29 - new ECB_MEMORY_FENCE_RELAXED memory fence.
109 root 1.28 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
110     - rely on c++ compiler barriers to do the right thing in gcc/clang.
111 root 1.27 - change release memory fence to memory barrier on ia32/ia64.
112 root 1.23 - apply ctz/ld patch for msc by Zsbán Ambrus.
113 root 1.24 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
114     found by Zsbán Ambrus).
115 root 1.25 - improved compiletime detection of endianness, also, allow
116     runtime detection to indicate other-than-big/little endianness.
117 root 1.26 - no memory barrier neded on arm < 6.
118 root 1.23
119 root 1.22 0x00010005
120     - improve ecb_binary16_to_float.
121     - add ecb_float_to_binary16.
122     - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
123    
124 root 1.6 0x00010001
125     - add ecb_is_pot32/64.
126     - add intptr_t/uintptr_t.
127     - add ECB_PTRSIZE.
128 root 1.7 - more macros for C/C++ version checks.
129     - support C11 atomics for memory fences.
130     - support gcc-4.7 atomics for memory fences.
131 root 1.10 - support m68k, m88k and sh (patch by Miod Vallat).
132 root 1.11 - add ecb_binary16_to_float.
133 root 1.6
134 root 1.9 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
135 sf-exg 1.20 TODO: ffs
136 root 1.1 64 bit variants of everything
137 root 1.2 TODO: examples from X for clz/ctz
138 root 1.3 TODO: arithmetic right shift
139     TODO: template/generic functions for x32/x64 and so on
140 root 1.4 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
141 root 1.3 TODO: generalised shift
142 root 1.8 TODO: #define ECB_FAST_UNALIGNED_ACCESS
143 root 1.3 unsigned long gensh(unsigned long v, int x) {
144     int a, b;
145     a = (v << x) & -(((unsigned int)x) < 32);
146     x = -x;
147     b = (v >> x) & -(((unsigned int)x) < 32);
148     return a|b;
149     }
150 root 1.14
151 root 1.16 TODO: export(=dllexport) & hidden
152     TODO: flatten
153     TODO: warning(msg)
154     TODO: error(msg)
155 root 1.17 TODO: leaf (uh), noclone (hmmm)
156     TODO: nonnull, returns_nonnull
157     TODO: nothrow
158     TODO: used
159     TODO: trap
160     TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
161 root 1.16
162 root 1.14 TODO: read/write unaligned macros
163     TODO: htonl and friends
164 sf-exg 1.20 TODO: macro to convert from unsigned to signed "the natural way"
165 root 1.14 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
166     TODO: alignof
167    
168