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Revision: 1.32
Committed: Mon Jan 20 13:41:18 2020 UTC (4 years, 4 months ago) by root
Branch: MAIN
Changes since 1.31: +3 -1 lines
Log Message:
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File Contents

# User Rev Content
1 root 1.15 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 root 1.28 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
17    
18     TODO: __builtin_popcountll exists...
19    
20 root 1.26 TODO: __builtin_powi
21    
22 root 1.15 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
23    
24 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/
25 root 1.12
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 root 1.32 TODO: generic poprcount etc., also fast_t for them?
73 root 1.30 0x00010008
74     - aligned/unaligned load/store, bswap, host order
75     conversion.
76 root 1.32 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
77     ecb_is_pot32 and ecb_bitrev functions.
78 root 1.30
79 root 1.29 0x00010007
80     - new ECB_OPTIMIZE_SIZE symbol.
81    
82 root 1.28 0x00010006
83 root 1.29 - new ECB_MEMORY_FENCE_RELAXED memory fence.
84 root 1.28 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
85     - rely on c++ compiler barriers to do the right thing in gcc/clang.
86 root 1.27 - change release memory fence to memory barrier on ia32/ia64.
87 root 1.23 - apply ctz/ld patch for msc by Zsbán Ambrus.
88 root 1.24 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
89     found by Zsbán Ambrus).
90 root 1.25 - improved compiletime detection of endianness, also, allow
91     runtime detection to indicate other-than-big/little endianness.
92 root 1.26 - no memory barrier neded on arm < 6.
93 root 1.23
94 root 1.22 0x00010005
95     - improve ecb_binary16_to_float.
96     - add ecb_float_to_binary16.
97     - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
98    
99 root 1.6 0x00010001
100     - add ecb_is_pot32/64.
101     - add intptr_t/uintptr_t.
102     - add ECB_PTRSIZE.
103 root 1.7 - more macros for C/C++ version checks.
104     - support C11 atomics for memory fences.
105     - support gcc-4.7 atomics for memory fences.
106 root 1.10 - support m68k, m88k and sh (patch by Miod Vallat).
107 root 1.11 - add ecb_binary16_to_float.
108 root 1.6
109 root 1.9 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
110 sf-exg 1.20 TODO: ffs
111 root 1.1 64 bit variants of everything
112 root 1.2 TODO: examples from X for clz/ctz
113 root 1.3 TODO: arithmetic right shift
114     TODO: template/generic functions for x32/x64 and so on
115 root 1.4 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
116 root 1.3 TODO: generalised shift
117 root 1.8 TODO: #define ECB_FAST_UNALIGNED_ACCESS
118 root 1.3 unsigned long gensh(unsigned long v, int x) {
119     int a, b;
120     a = (v << x) & -(((unsigned int)x) < 32);
121     x = -x;
122     b = (v >> x) & -(((unsigned int)x) < 32);
123     return a|b;
124     }
125 root 1.14
126 root 1.16 TODO: export(=dllexport) & hidden
127     TODO: flatten
128     TODO: warning(msg)
129     TODO: error(msg)
130 root 1.17 TODO: leaf (uh), noclone (hmmm)
131     TODO: nonnull, returns_nonnull
132     TODO: nothrow
133     TODO: used
134     TODO: trap
135     TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
136 root 1.16
137 root 1.14 TODO: read/write unaligned macros
138     TODO: htonl and friends
139 sf-exg 1.20 TODO: macro to convert from unsigned to signed "the natural way"
140 root 1.14 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
141     TODO: alignof
142    
143