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1 | /* -*-c-*- |
2 | * |
91928c79 |
3 | * $Id: bits.h,v 1.9 2001/01/20 12:05:20 mdw Exp $ |
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4 | * |
5 | * Portable bit-level manipulation macros |
6 | * |
7 | * (c) 1998 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * mLib is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with mLib; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: bits.h,v $ |
91928c79 |
33 | * Revision 1.9 2001/01/20 12:05:20 mdw |
34 | * New hack for storing 64-bit numbers in tables. |
35 | * |
1f175471 |
36 | * Revision 1.8 2000/10/08 11:06:30 mdw |
37 | * Shut later versions of GCC up about use of @long long@. |
38 | * |
3b7cea93 |
39 | * Revision 1.7 2000/07/22 09:48:26 mdw |
40 | * Added macros for reading 64-bit values. |
41 | * |
a6f4a484 |
42 | * Revision 1.6 2000/07/16 12:28:28 mdw |
43 | * Add 64-bit support, with faked arithmetic on 32-bit hosts. |
44 | * |
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45 | * Revision 1.5 2000/06/17 10:36:06 mdw |
46 | * Support for 24-bit types. |
47 | * |
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48 | * Revision 1.4 1999/12/10 23:42:04 mdw |
49 | * Change header file guard names. |
50 | * |
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51 | * Revision 1.3 1999/06/20 23:31:52 mdw |
52 | * More portability enhancements. |
53 | * |
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54 | * Revision 1.2 1999/06/17 00:12:46 mdw |
55 | * Improve portability for shift and rotate macros. |
56 | * |
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57 | * Revision 1.1 1999/06/01 09:46:19 mdw |
58 | * New addition: bit manipulation macros. |
59 | * |
60 | */ |
61 | |
c6e0eaf0 |
62 | #ifndef MLIB_BITS_H |
63 | #define MLIB_BITS_H |
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64 | |
65 | #ifdef __cplusplus |
66 | extern "C" { |
67 | #endif |
68 | |
69 | /*----- Header files ------------------------------------------------------*/ |
70 | |
71 | #include <limits.h> |
72 | #include <stddef.h> |
a6f4a484 |
73 | #if __STDC_VERSION__ >= 199900l |
74 | # include <stdint.h> |
75 | #endif |
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76 | |
77 | /*----- Decide on some types ----------------------------------------------*/ |
78 | |
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79 | /* --- Make GNU C shut up --- */ |
80 | |
81 | #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91) |
82 | # define MLIB_BITS_EXTENSION __extension__ |
83 | #else |
84 | # define MLIB_BITS_EXTENSION |
85 | #endif |
86 | |
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87 | /* --- Decide on a 32-bit type --- * |
88 | * |
89 | * I want a type which is capable of expressing 32-bit numbers. Because some |
90 | * implementations have 64-bit @long@s (infinitely preferable to the abortion |
91 | * that is @long long@), using @unsigned long@ regardless is wasteful. So, |
92 | * if @int@ appears to be good enough, then I'll go with that. |
93 | */ |
94 | |
95 | #if UINT_MAX >= 0xffffffffu |
96 | typedef unsigned int uint32; |
97 | #else |
98 | typedef unsigned long uint32; |
99 | #endif |
100 | |
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101 | /* --- Decide on a 64-bit type --- * |
102 | * |
103 | * The test is quite subtle. Think about it. Note that (at least on my |
104 | * machine), the 32-bit macros are *much* faster than GCC's @long long@ |
105 | * support. |
106 | */ |
107 | |
108 | #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX) |
109 | # define ULLONG_MAX ULONG_LONG_MAX |
110 | #endif |
111 | |
112 | #if UINT_MAX >> 31 > 0xffffffff |
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113 | # define HAVE_UINT64 |
114 | typedef unsigned int uint64; |
a6f4a484 |
115 | #elif ULONG_MAX >> 31 > 0xffffffff |
1f175471 |
116 | # define HAVE_UINT64 |
117 | typedef unsigned long uint64; |
a6f4a484 |
118 | #elif defined(ULLONG_MAX) |
1f175471 |
119 | # define HAVE_UINT64 |
120 | MLIB_BITS_EXTENSION typedef unsigned long long uint64; |
a6f4a484 |
121 | #endif |
122 | |
123 | #ifdef DEBUG64 |
124 | # undef HAVE_UINT64 |
125 | #endif |
126 | |
127 | #ifdef HAVE_UINT64 |
128 | typedef struct { uint64 i; } kludge64; |
129 | #else |
130 | typedef struct { uint32 hi, lo; } kludge64; |
131 | #endif |
132 | |
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133 | /* --- Decide on a 24-bit type --- */ |
134 | |
135 | #if UINT_MAX >= 0x00ffffffu |
136 | typedef unsigned int uint24; |
137 | #else |
138 | typedef unsigned long uint24; |
139 | #endif |
140 | |
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141 | /* --- Decide on 16-bit and 8-bit types --- * |
142 | * |
143 | * This is more for brevity than anything else. |
144 | */ |
145 | |
146 | typedef unsigned short uint16; |
147 | typedef unsigned char octet; |
148 | |
149 | /* --- WARNING! --- * |
150 | * |
151 | * Never lose sight of the fact that the above types may be wider than the |
152 | * names suggest. Some architectures have 32-bit @short@s for example. |
153 | */ |
154 | |
155 | /*----- Macros ------------------------------------------------------------*/ |
156 | |
157 | /* --- Useful masks --- */ |
158 | |
159 | #define MASK8 0xffu |
160 | #define MASK16 0xffffu |
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161 | #define MASK24 0xffffffu |
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162 | #define MASK32 0xffffffffu |
163 | |
a6f4a484 |
164 | #ifdef HAVE_UINT64 |
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165 | # define MASK64 MLIB_BITS_EXTENSION 0xffffffffffffffffu |
a6f4a484 |
166 | #endif |
167 | |
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168 | /* --- Type coercions --- */ |
169 | |
170 | #define U8(x) ((octet)((x) & MASK8)) |
171 | #define U16(x) ((uint16)((x) & MASK16)) |
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172 | #define U24(x) ((uint24)((x) & MASK24)) |
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173 | #define U32(x) ((uint32)((x) & MASK32)) |
174 | |
a6f4a484 |
175 | #ifdef HAVE_UINT64 |
176 | # define U64(x) ((uint64)(x) & MASK64) |
177 | # define U64_(d, x) ((d).i = U64(x).i) |
178 | #else |
179 | # define U64_(d, x) ((d).hi = U32((x).hi), (d).lo = U32((x).lo)) |
180 | #endif |
181 | |
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182 | /* --- Safe shifting macros --- */ |
183 | |
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184 | #define LSL8(v, s) U8(U8(v) << ((s) & 7u)) |
185 | #define LSR8(v, s) U8(U8(v) >> ((s) & 7u)) |
186 | #define LSL16(v, s) U16(U16(v) << ((s) & 15u)) |
187 | #define LSR16(v, s) U16(U16(v) >> ((s) & 15u)) |
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188 | #define LSL24(v, s) U24(U24(v) << ((s) % 24u)) |
189 | #define LSR24(v, s) U24(U24(v) >> ((s) % 24u)) |
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190 | #define LSL32(v, s) U32(U32(v) << ((s) & 31u)) |
191 | #define LSR32(v, s) U32(U32(v) >> ((s) & 31u)) |
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192 | |
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193 | #ifdef HAVE_UINT64 |
194 | # define LSL64(v, s) U64(U64(v) << ((s) & 63u)) |
195 | # define LSR64(v, s) U64(U64(v) >> ((s) & 63u)) |
196 | # define LSL64_(d, v, s) ((d).i = LSL64((v).i, (s))) |
197 | # define LSR64_(d, v, s) ((d).i = LSR64((v).i, (s))) |
198 | #else |
199 | # define LSL64_(d, v, s) do { \ |
200 | unsigned _s = (s) & 63u; \ |
201 | uint32 _l = (v).lo, _h = (v).hi; \ |
202 | kludge64 *_d = &(d); \ |
203 | if (_s >= 32) { \ |
204 | _d->hi = LSL32(_l, _s - 32u); \ |
205 | _d->lo = 0; \ |
206 | } else if (!_s) { \ |
207 | _d->lo = _l; \ |
208 | _d->hi = _h; \ |
209 | } else { \ |
210 | _d->hi = LSL32(_h, _s) | LSR32(_l, 32u - _s); \ |
211 | _d->lo = LSL32(_l, _s); \ |
212 | } \ |
213 | } while (0) |
214 | # define LSR64_(d, v, s) do { \ |
215 | unsigned _s = (s) & 63u; \ |
216 | uint32 _l = (v).lo, _h = (v).hi; \ |
217 | kludge64 *_d = &(d); \ |
218 | if (_s >= 32) { \ |
219 | _d->lo = LSR32(_h, _s - 32u); \ |
220 | _d->hi = 0; \ |
221 | } else if (!_s) { \ |
222 | _d->lo = _l; \ |
223 | _d->hi = _h; \ |
224 | } else { \ |
225 | _d->lo = LSR32(_l, _s) | LSL32(_h, 32u - _s); \ |
226 | _d->hi = LSR32(_h, _s); \ |
227 | } \ |
228 | } while (0) |
229 | #endif |
230 | |
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231 | /* --- Rotation macros --- */ |
232 | |
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233 | #define ROL8(v, s) (LSL8((v), (s)) | (LSR8((v), 8u - (s)))) |
234 | #define ROR8(v, s) (LSR8((v), (s)) | (LSL8((v), 8u - (s)))) |
235 | #define ROL16(v, s) (LSL16((v), (s)) | (LSR16((v), 16u - (s)))) |
236 | #define ROR16(v, s) (LSR16((v), (s)) | (LSL16((v), 16u - (s)))) |
6a0129ea |
237 | #define ROL24(v, s) (LSL24((v), (s)) | (LSR24((v), 24u - (s)))) |
238 | #define ROR24(v, s) (LSR24((v), (s)) | (LSL24((v), 24u - (s)))) |
bc9f60b6 |
239 | #define ROL32(v, s) (LSL32((v), (s)) | (LSR32((v), 32u - (s)))) |
240 | #define ROR32(v, s) (LSR32((v), (s)) | (LSL32((v), 32u - (s)))) |
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241 | |
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242 | #ifdef HAVE_UINT64 |
243 | # define ROL64(v, s) (LSL64((v), (s)) | (LSR64((v), 64u - (s)))) |
244 | # define ROR64(v, s) (LSR64((v), (s)) | (LSL64((v), 64u - (s)))) |
245 | # define ROL64_(d, v, s) ((d).i = ROL64((v).i, (s))) |
246 | # define ROR64_(d, v, s) ((d).i = ROR64((v).i, (s))) |
247 | #else |
248 | # define ROL64_(d, v, s) do { \ |
249 | unsigned _s = (s) & 63u; \ |
250 | uint32 _l = (v).lo, _h = (v).hi; \ |
251 | kludge64 *_d = &(d); \ |
252 | if (_s >= 32) { \ |
253 | _d->hi = LSL32(_l, _s - 32u) | LSR32(_h, 64u - _s); \ |
254 | _d->lo = LSL32(_h, _s - 32u) | LSR32(_l, 64u - _s); \ |
255 | } else if (!_s) { \ |
256 | _d->lo = _l; \ |
257 | _d->hi = _h; \ |
258 | } else { \ |
259 | _d->hi = LSL32(_h, _s) | LSR32(_l, 32u - _s); \ |
260 | _d->lo = LSL32(_l, _s) | LSR32(_h, 32u - _s); \ |
261 | } \ |
262 | } while (0) |
263 | # define ROR64_(d, v, s) do { \ |
264 | unsigned _s = (s) & 63u; \ |
265 | uint32 _l = (v).lo, _h = (v).hi; \ |
266 | kludge64 *_d = &(d); \ |
267 | if (_s >= 32) { \ |
268 | _d->hi = LSR32(_l, _s - 32u) | LSL32(_h, 64u - _s); \ |
269 | _d->lo = LSR32(_h, _s - 32u) | LSL32(_l, 64u - _s); \ |
270 | } else if (!_s) { \ |
271 | _d->lo = _l; \ |
272 | _d->hi = _h; \ |
273 | } else { \ |
274 | _d->hi = LSR32(_h, _s) | LSL32(_l, 32u - _s); \ |
275 | _d->lo = LSR32(_l, _s) | LSL32(_h, 32u - _s); \ |
276 | } \ |
277 | } while (0) |
278 | #endif |
279 | |
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280 | /* --- Storage and retrieval --- */ |
281 | |
282 | #define GETBYTE(p, o) (((octet *)(p))[o] & MASK8) |
283 | #define PUTBYTE(p, o, v) (((octet *)(p))[o] = U8((v))) |
284 | |
285 | #define LOAD8(p) (GETBYTE((p), 0)) |
286 | #define STORE8(p, v) (PUTBYTE((p), 0, (v))) |
287 | |
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288 | #define LOAD16_B(p) \ |
289 | (((uint16)GETBYTE((p), 0) << 8) | \ |
290 | ((uint16)GETBYTE((p), 1) << 0)) |
291 | #define LOAD16_L(p) \ |
292 | (((uint16)GETBYTE((p), 0) << 0) | \ |
293 | ((uint16)GETBYTE((p), 1) << 8)) |
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294 | #define LOAD16(p) LOAD16_B((p)) |
295 | |
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296 | #define STORE16_B(p, v) \ |
297 | (PUTBYTE((p), 0, (uint16)(v) >> 8), \ |
298 | PUTBYTE((p), 1, (uint16)(v) >> 0)) |
299 | #define STORE16_L(p, v) \ |
300 | (PUTBYTE((p), 0, (uint16)(v) >> 0), \ |
301 | PUTBYTE((p), 1, (uint16)(v) >> 8)) |
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302 | #define STORE16(p, v) STORE16_B((p), (v)) |
303 | |
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304 | #define LOAD24_B(p) \ |
305 | (((uint24)GETBYTE((p), 0) << 16) | \ |
306 | ((uint24)GETBYTE((p), 1) << 8) | \ |
307 | ((uint24)GETBYTE((p), 2) << 0)) |
308 | #define LOAD24_L(p) \ |
309 | (((uint24)GETBYTE((p), 0) << 0) | \ |
310 | ((uint24)GETBYTE((p), 1) << 8) | \ |
311 | ((uint24)GETBYTE((p), 2) << 16)) |
312 | #define LOAD24(p) LOAD24_B((p)) |
313 | |
314 | #define STORE24_B(p, v) \ |
315 | (PUTBYTE((p), 0, (uint24)(v) >> 16), \ |
316 | PUTBYTE((p), 1, (uint24)(v) >> 8), \ |
317 | PUTBYTE((p), 2, (uint24)(v) >> 0)) |
318 | #define STORE24_L(p, v) \ |
319 | (PUTBYTE((p), 0, (uint24)(v) >> 0), \ |
320 | PUTBYTE((p), 1, (uint24)(v) >> 8), \ |
321 | PUTBYTE((p), 2, (uint24)(v) >> 16)) |
322 | #define STORE24(p, v) STORE24_B((p), (v)) |
323 | |
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324 | #define LOAD32_B(p) \ |
0d4e268a |
325 | (((uint32)GETBYTE((p), 0) << 24) | \ |
326 | ((uint32)GETBYTE((p), 1) << 16) | \ |
327 | ((uint32)GETBYTE((p), 2) << 8) | \ |
328 | ((uint32)GETBYTE((p), 3) << 0)) |
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329 | #define LOAD32_L(p) \ |
0d4e268a |
330 | (((uint32)GETBYTE((p), 0) << 0) | \ |
331 | ((uint32)GETBYTE((p), 1) << 8) | \ |
332 | ((uint32)GETBYTE((p), 2) << 16) | \ |
333 | ((uint32)GETBYTE((p), 3) << 24)) |
6b033bc4 |
334 | #define LOAD32(p) LOAD32_B((p)) |
335 | |
336 | #define STORE32_B(p, v) \ |
0d4e268a |
337 | (PUTBYTE((p), 0, (uint32)(v) >> 24), \ |
338 | PUTBYTE((p), 1, (uint32)(v) >> 16), \ |
339 | PUTBYTE((p), 2, (uint32)(v) >> 8), \ |
340 | PUTBYTE((p), 3, (uint32)(v) >> 0)) |
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341 | #define STORE32_L(p, v) \ |
0d4e268a |
342 | (PUTBYTE((p), 0, (uint32)(v) >> 0), \ |
343 | PUTBYTE((p), 1, (uint32)(v) >> 8), \ |
344 | PUTBYTE((p), 2, (uint32)(v) >> 16), \ |
345 | PUTBYTE((p), 3, (uint32)(v) >> 24)) |
6b033bc4 |
346 | #define STORE32(p, v) STORE32_B((p), (v)) |
347 | |
a6f4a484 |
348 | #ifdef HAVE_UINT64 |
349 | |
350 | # define LOAD64_B(p) \ |
351 | (((uint64)GETBYTE((p), 0) << 56) | \ |
352 | ((uint64)GETBYTE((p), 1) << 48) | \ |
353 | ((uint64)GETBYTE((p), 2) << 40) | \ |
354 | ((uint64)GETBYTE((p), 3) << 32) | \ |
355 | ((uint64)GETBYTE((p), 4) << 24) | \ |
356 | ((uint64)GETBYTE((p), 5) << 16) | \ |
357 | ((uint64)GETBYTE((p), 6) << 8) | \ |
358 | ((uint64)GETBYTE((p), 7) << 0)) |
359 | # define LOAD64_L(p) \ |
360 | (((uint64)GETBYTE((p), 0) << 0) | \ |
361 | ((uint64)GETBYTE((p), 1) << 8) | \ |
362 | ((uint64)GETBYTE((p), 2) << 16) | \ |
363 | ((uint64)GETBYTE((p), 3) << 24) | \ |
364 | ((uint64)GETBYTE((p), 4) << 32) | \ |
365 | ((uint64)GETBYTE((p), 5) << 40) | \ |
366 | ((uint64)GETBYTE((p), 6) << 48) | \ |
367 | ((uint64)GETBYTE((p), 7) << 56)) |
368 | # define LOAD64(p) LOAD64_B((p)) |
369 | # define LOAD64_B_(d, p) ((d).i = LOAD64_B((p))) |
370 | # define LOAD64_L_(d, p) ((d).i = LOAD64_L((p))) |
371 | # define LOAD64_(d, p) LOAD64_B_((d), (p)) |
372 | |
373 | # define STORE64_B(p, v) \ |
374 | (PUTBYTE((p), 0, (uint64)(v) >> 56), \ |
375 | PUTBYTE((p), 1, (uint64)(v) >> 48), \ |
376 | PUTBYTE((p), 2, (uint64)(v) >> 40), \ |
377 | PUTBYTE((p), 3, (uint64)(v) >> 32), \ |
378 | PUTBYTE((p), 4, (uint64)(v) >> 24), \ |
379 | PUTBYTE((p), 5, (uint64)(v) >> 16), \ |
380 | PUTBYTE((p), 6, (uint64)(v) >> 8), \ |
381 | PUTBYTE((p), 7, (uint64)(v) >> 0)) |
382 | # define STORE64_L(p, v) \ |
383 | (PUTBYTE((p), 0, (uint64)(v) >> 0), \ |
384 | PUTBYTE((p), 1, (uint64)(v) >> 8), \ |
385 | PUTBYTE((p), 2, (uint64)(v) >> 16), \ |
386 | PUTBYTE((p), 3, (uint64)(v) >> 24), \ |
387 | PUTBYTE((p), 4, (uint64)(v) >> 32), \ |
388 | PUTBYTE((p), 5, (uint64)(v) >> 40), \ |
389 | PUTBYTE((p), 6, (uint64)(v) >> 48), \ |
390 | PUTBYTE((p), 7, (uint64)(v) >> 56)) |
391 | # define STORE64(p, v) STORE64_B((p), (v)) |
392 | # define STORE64_B_(p, v) STORE64_B((p), (v).i) |
393 | # define STORE64_L_(p, v) STORE64_L((p), (v).i) |
394 | # define STORE64_(p, v) STORE64_B_((p), (v)) |
395 | |
396 | #else |
397 | |
398 | # define LOAD64_B_(d, p) \ |
399 | ((d).hi = LOAD32_B((octet *)(p) + 0), \ |
400 | (d).lo = LOAD32_B((octet *)(p) + 4)) |
401 | # define LOAD64_L_(d, p) \ |
402 | ((d).lo = LOAD32_L((octet *)(p) + 0), \ |
403 | (d).hi = LOAD32_L((octet *)(p) + 4)) |
404 | # define LOAD64_(d, p) LOAD64_B_((d), (p)) |
405 | |
406 | # define STORE64_B_(p, v) \ |
407 | (STORE32_B((octet *)(p) + 0, (v).hi), \ |
408 | STORE32_B((octet *)(p) + 4, (v).lo)) |
409 | # define STORE64_L_(p, v) \ |
410 | (STORE32_L((octet *)(p) + 0, (v).lo), \ |
411 | STORE32_L((octet *)(p) + 4, (v).hi)) |
412 | # define STORE64_(p, v) STORE64_B_((p), (v)) |
413 | |
414 | #endif |
415 | |
416 | /* --- Other operations on 64-bit integers --- */ |
417 | |
418 | #ifdef HAVE_UINT64 |
419 | # define SET64(d, h, l) ((d).i = (U64((h)) << 32) | U64((l))) |
420 | # define ASSIGN64(d, x) ((d).i = U64((x))) |
421 | # define HI64(x) U32((x).i >> 32) |
422 | # define LO64(x) U32((x).i) |
3b7cea93 |
423 | # define GET64(t, x) ((t)(x).i) |
a6f4a484 |
424 | #else |
425 | # define SET64(d, h, l) ((d).hi = U32(h), (d).lo = U32(l)) |
426 | # define ASSIGN64(d, x) \ |
427 | ((d).hi = ((x & ~MASK32) >> 16) >> 16, (d).lo = U32(x)) |
428 | # define HI64(x) U32((x).hi) |
429 | # define LO64(x) U32((x).lo) |
3b7cea93 |
430 | # define GET64(t, x) (((((t)HI64(x) << 16) << 16) & ~MASK32) | (t)LO64(x)) |
a6f4a484 |
431 | #endif |
432 | |
433 | #ifdef HAVE_UINT64 |
434 | # define AND64(d, x, y) ((d).i = (x).i & (y).i) |
435 | # define OR64(d, x, y) ((d).i = (x).i | (y).i) |
436 | # define XOR64(d, x, y) ((d).i = (x).i ^ (y).i) |
437 | # define CPL64(d, x) ((d).i = ~(x).i) |
438 | # define ADD64(d, x, y) ((d).i = (x).i + (y).i) |
439 | # define SUB64(d, x, y) ((d).i = (x).i - (y).i) |
440 | # define CMP64(x, op, y) ((x).i op (y).i) |
441 | # define ZERO64(x) ((x) == 0) |
442 | #else |
443 | # define AND64(d, x, y) ((d).lo = (x).lo & (y).lo, (d).hi = (x).hi & (y).hi) |
444 | # define OR64(d, x, y) ((d).lo = (x).lo | (y).lo, (d).hi = (x).hi | (y).hi) |
445 | # define XOR64(d, x, y) ((d).lo = (x).lo ^ (y).lo, (d).hi = (x).hi ^ (y).hi) |
446 | # define CPL64(d, x) ((d).lo = ~(x).lo, (d).hi = ~(x).hi) |
447 | # define ADD64(d, x, y) do { \ |
448 | uint32 _x = U32((x).lo + (y).lo); \ |
449 | (d).hi = (x).hi + (y).hi + (_x < (x).lo); \ |
450 | (d).lo = _x; \ |
451 | } while (0) |
452 | # define SUB64(d, x, y) do { \ |
453 | uint32 _x = U32((x).lo - (y).lo); \ |
454 | (d).hi = (x).hi - (y).hi - (_x > (x).lo); \ |
455 | (d).lo = _x; \ |
456 | } while (0) |
457 | # define CMP64(x, op, y) \ |
458 | ((x).hi == (y).hi ? (x).lo op (y).lo : (x).hi op (y).hi) |
459 | # define ZERO64(x) ((x).lo == 0 && (x).hi == 0) |
460 | #endif |
461 | |
91928c79 |
462 | /* --- Storing integers in tables --- */ |
463 | |
464 | #ifdef HAVE_UINT64 |
465 | # define X64(x, y) { 0x##x##y } |
466 | #else |
467 | # define X64(x, y) { 0x##x, 0x##y } |
468 | #endif |
469 | |
6b033bc4 |
470 | /*----- That's all, folks -------------------------------------------------*/ |
471 | |
472 | #ifdef __cplusplus |
473 | } |
474 | #endif |
475 | |
476 | #endif |