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Revision: 1.36
Committed: Sat Jul 31 16:13:30 2021 UTC (2 years, 10 months ago) by root
Branch: MAIN
Changes since 1.35: +3 -0 lines
Log Message:
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File Contents

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