ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libecb/Changes
Revision: 1.37
Committed: Fri Aug 20 19:39:15 2021 UTC (2 years, 9 months ago) by root
Branch: MAIN
CVS Tags: rxvt-unicode-rel-9_29, rxvt-unicode-rel-9_30
Changes since 1.36: +3 -0 lines
Log Message:
mix/unmix

File Contents

# Content
1 0x0001000a
2 - added ecb_ptrmix.
3
4 0x00010009
5 - added ecb_i2a family of functions.
6 - added ECB_64BIT_NATIVE.
7
8 TODO:
9 08:30:06 <b_jonas> I think it could be worth to add a macro that works like alignof or _Alignof on sane
10 compilers, and like __alignof on MS compilers that support it, see
11 http://msdn.microsoft.com/en-us/library/45t0s5f4.aspx
12 08:30:24 <b_jonas> even if you can't support it on all the old compilers
13 08:31:17 <b_jonas> I'd also like a macro for alignas, but sadly, that seems impossible in general, because
14 the MS compiler only has some half-attempt to do something similar but with different and
15 more broken semantics, see http://msdn.microsoft.com/en-us/library/83ythb65.aspx
16 08:31:35 <b_jonas> but I wonder if some special case could still be worth to support
17 08:32:23 <b_jonas> probably not, because it would just account to making a union with a highly aligned type,
18 which is something I can do on any compiler portably
19
20 TODO: #define ECB_IS_INTEGRAL(x) !((1 ? 1 : (x)) / 2)
21 #define ECB_IS_INTEGRAL(x) (sizeof ((x) + 1.0f) != sizeof((x) + 1ULL))
22
23 TODO: ecb_minpot, either using bit tricks or ecb_ldXX
24
25 TODO: __builtin_popcountll exists...
26
27 TODO: __builtin_powi
28
29 TODO: https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
30
31 implement is_constant for c11: https://gustedt.wordpress.com/2013/08/22/testing-compile-time-constness-and-null-pointers-with-c11s-_generic/
32
33 #ifdef _MSC_VER
34
35 #include <stdlib.h>
36 #define bswap_32(x) _byteswap_ulong(x)
37 #define bswap_64(x) _byteswap_uint64(x)
38
39 #elif defined(__APPLE__)
40
41 // Mac OS X / Darwin features
42 #include <libkern/OSByteOrder.h>
43 #define bswap_32(x) OSSwapInt32(x)
44 #define bswap_64(x) OSSwapInt64(x)
45
46 #elif defined(__sun) || defined(sun)
47
48 #include <sys/byteorder.h>
49 #define bswap_32(x) BSWAP_32(x)
50 #define bswap_64(x) BSWAP_64(x)
51
52 #elif defined(__FreeBSD__)
53
54 #include <sys/endian.h>
55 #define bswap_32(x) bswap32(x)
56 #define bswap_64(x) bswap64(x)
57
58 #elif defined(__OpenBSD__)
59
60 #include <sys/types.h>
61 #define bswap_32(x) swap32(x)
62 #define bswap_64(x) swap64(x)
63
64 #elif defined(__NetBSD__)
65
66 #include <sys/types.h>
67 #include <machine/bswap.h>
68 #if defined(__BSWAP_RENAME) && !defined(__bswap_32)
69 #define bswap_32(x) bswap32(x)
70 #define bswap_64(x) bswap64(x)
71 #endif
72
73 #else
74
75 #include <byteswap.h>
76
77 #endif
78
79 TODO: generic poprcount etc., also fast_t for them?
80
81 - allow any rotate count in rcb_rot*, at the expense
82 of bad optimisation results on some platforms or with
83 some word sizes.
84 - try to use inttypes.h on mingw.
85
86 0x00010008
87 - aligned/unaligned load/store, bswap, host order
88 conversion.
89 - generic C++ ecb_rot[lr], ecb_popcount, ecb_ctz,
90 ecb_is_pot32 and ecb_bitrev functions.
91
92 0x00010007
93 - new ECB_OPTIMIZE_SIZE symbol.
94
95 0x00010006
96 - new ECB_MEMORY_FENCE_RELAXED memory fence.
97 - use acquire/eelease memory barriers on sun workshop pro, not read/write.
98 - rely on c++ compiler barriers to do the right thing in gcc/clang.
99 - change release memory fence to memory barrier on ia32/ia64.
100 - apply ctz/ld patch for msc by Zsbán Ambrus.
101 - ECB_PTRSIZE erroneously was 8 on most 32bit systems (
102 found by Zsbán Ambrus).
103 - improved compiletime detection of endianness, also, allow
104 runtime detection to indicate other-than-big/little endianness.
105 - no memory barrier neded on arm < 6.
106
107 0x00010005
108 - improve ecb_binary16_to_float.
109 - add ecb_float_to_binary16.
110 - add ecb_binary16_to_binary32 and ecb_binary32_to_binary16 pair.
111
112 0x00010001
113 - add ecb_is_pot32/64.
114 - add intptr_t/uintptr_t.
115 - add ECB_PTRSIZE.
116 - more macros for C/C++ version checks.
117 - support C11 atomics for memory fences.
118 - support gcc-4.7 atomics for memory fences.
119 - support m68k, m88k and sh (patch by Miod Vallat).
120 - add ecb_binary16_to_float.
121
122 TODO: ecb_restrict_array etc. http://ue.tst.eu/5093eafd713ec5fda776d8065070aa4c.txt
123 TODO: ffs
124 64 bit variants of everything
125 TODO: examples from X for clz/ctz
126 TODO: arithmetic right shift
127 TODO: template/generic functions for x32/x64 and so on
128 TODO: #define ecb_integer_multiples_of(n,d) ((char (*)[d])(n) - (char (*)[d])0)
129 TODO: generalised shift
130 TODO: #define ECB_FAST_UNALIGNED_ACCESS
131 unsigned long gensh(unsigned long v, int x) {
132 int a, b;
133 a = (v << x) & -(((unsigned int)x) < 32);
134 x = -x;
135 b = (v >> x) & -(((unsigned int)x) < 32);
136 return a|b;
137 }
138
139 TODO: export(=dllexport) & hidden
140 TODO: flatten
141 TODO: warning(msg)
142 TODO: error(msg)
143 TODO: leaf (uh), noclone (hmmm)
144 TODO: nonnull, returns_nonnull
145 TODO: nothrow
146 TODO: used
147 TODO: trap
148 TODO: http://llvm.org/docs/doxygen/html/Compiler_8h_source.html
149
150 TODO: read/write unaligned macros
151 TODO: htonl and friends
152 TODO: macro to convert from unsigned to signed "the natural way"
153 TODO: ecb_static_assert, with message (just like boost), or somesuch, using array-declaration
154 TODO: alignof
155
156