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platform.h
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1/* Copyright 2016 Google Inc. All Rights Reserved.
2
3 Distributed under MIT license.
4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
5*/
6
7/* Macros for compiler / platform specific features and build options.
8
9 Build options are:
10 * BROTLI_BUILD_32_BIT disables 64-bit optimizations
11 * BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
12 * BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
13 * BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
14 * BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
15 * BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
16 * BROTLI_BUILD_NO_UNALIGNED_READ_FAST forces off the fast-unaligned-read
17 optimizations (mainly for testing purposes)
18 * BROTLI_DEBUG dumps file name and line number when decoder detects stream
19 or memory error
20 * BROTLI_ENABLE_LOG enables asserts and dumps various state information
21 * BROTLI_ENABLE_DUMP overrides default "dump" behaviour
22*/
23
24#ifndef BROTLI_COMMON_PLATFORM_H_
25#define BROTLI_COMMON_PLATFORM_H_
26
27#include <string.h> /* memcpy */
28
29#include <brotli/port.h>
30#include <brotli/types.h>
31
32#if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__)
33#include <endian.h>
34#elif defined(OS_FREEBSD)
35#include <machine/endian.h>
36#elif defined(OS_MACOSX)
37#include <machine/endian.h>
38/* Let's try and follow the Linux convention */
39#define BROTLI_X_BYTE_ORDER BYTE_ORDER
40#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN
41#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
42#endif
43
44#if BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
45#include <intrin.h>
46#endif
47
48#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
49#include <assert.h>
50#include <stdio.h>
51#endif
52
53/* The following macros were borrowed from https://github.com/nemequ/hedley
54 * with permission of original author - Evan Nemerson <evan@nemerson.com> */
55
56/* >>> >>> >>> hedley macros */
57
58/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable
59 compilers.
60
61To apply compiler hint, enclose the branching condition into macros, like this:
62
63 if (BROTLI_PREDICT_TRUE(zero == 0)) {
64 // main execution path
65 } else {
66 // compiler should place this code outside of main execution path
67 }
68
69OR:
70
71 if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) {
72 // compiler should place this code outside of main execution path
73 }
74
75*/
76#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \
77 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
78 BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \
79 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
80 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
81 BROTLI_TI_VERSION_CHECK(7, 3, 0) || \
82 BROTLI_TINYC_VERSION_CHECK(0, 9, 27)
83#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
84#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0))
85#else
86#define BROTLI_PREDICT_FALSE(x) (x)
87#define BROTLI_PREDICT_TRUE(x) (x)
88#endif
89
90#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
91 !defined(__cplusplus)
92#define BROTLI_RESTRICT restrict
93#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \
94 BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \
95 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
96 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
97 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
98 BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \
99 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
100 BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \
101 (BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus))
102#define BROTLI_RESTRICT __restrict
103#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus)
104#define BROTLI_RESTRICT _Restrict
105#else
106#define BROTLI_RESTRICT
107#endif
108
109#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
110 (defined(__cplusplus) && (__cplusplus >= 199711L))
111#define BROTLI_MAYBE_INLINE inline
112#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \
113 BROTLI_ARM_VERSION_CHECK(6, 2, 0)
114#define BROTLI_MAYBE_INLINE __inline__
115#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \
116 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0)
117#define BROTLI_MAYBE_INLINE __inline
118#else
119#define BROTLI_MAYBE_INLINE
120#endif
121
122#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \
123 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
124 BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
125 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
126 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
127 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
128 (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
129#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__))
130#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
131#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline
132#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus)
133#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
134#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
135#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced")
136#else
137#define BROTLI_INLINE BROTLI_MAYBE_INLINE
138#endif
139
140#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \
141 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
142 BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
143 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
144 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
145 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
146 (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
147#define BROTLI_NOINLINE __attribute__((__noinline__))
148#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0)
149#define BROTLI_NOINLINE __declspec(noinline)
150#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0)
151#define BROTLI_NOINLINE _Pragma("noinline")
152#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus)
153#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;")
154#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
155#define BROTLI_NOINLINE _Pragma("inline=never")
156#else
157#define BROTLI_NOINLINE
158#endif
159
160/* <<< <<< <<< end of hedley macros. */
161
162#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \
163 BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
164#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused))
165#else
166#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE
167#endif
168
169#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
170#define BROTLI_ALIGNED(N) __attribute__((aligned(N)))
171#else
172#define BROTLI_ALIGNED(N)
173#endif
174
175#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \
176 (defined(M_ARM) && (M_ARM == 7))
177#define BROTLI_TARGET_ARMV7
178#endif /* ARMv7 */
179
180#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \
181 defined(__aarch64__) || defined(__ARM64_ARCH_8__)
182#define BROTLI_TARGET_ARMV8_ANY
183
184#if defined(__ARM_32BIT_STATE)
185#define BROTLI_TARGET_ARMV8_32
186#elif defined(__ARM_64BIT_STATE)
187#define BROTLI_TARGET_ARMV8_64
188#endif
189
190#endif /* ARMv8 */
191
192#if defined(__ARM_NEON__) || defined(__ARM_NEON)
193#define BROTLI_TARGET_NEON
194#endif
195
196#if defined(__i386) || defined(_M_IX86)
197#define BROTLI_TARGET_X86
198#endif
199
200#if defined(__x86_64__) || defined(_M_X64)
201#define BROTLI_TARGET_X64
202#endif
203
204#if defined(__PPC64__)
205#define BROTLI_TARGET_POWERPC64
206#endif
207
208#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
209#define BROTLI_TARGET_RISCV64
210#endif
211
212#if defined(__loongarch_lp64)
213#define BROTLI_TARGET_LOONGARCH64
214#endif
215
216#if defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \
217 defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64) || \
218 defined(BROTLI_TARGET_LOONGARCH64)
219#define BROTLI_TARGET_64_BITS 1
220#else
221#define BROTLI_TARGET_64_BITS 0
222#endif
223
224#if defined(BROTLI_BUILD_64_BIT)
225#define BROTLI_64_BITS 1
226#elif defined(BROTLI_BUILD_32_BIT)
227#define BROTLI_64_BITS 0
228#else
229#define BROTLI_64_BITS BROTLI_TARGET_64_BITS
230#endif
231
232#if (BROTLI_64_BITS)
233#define brotli_reg_t uint64_t
234#else
235#define brotli_reg_t uint32_t
236#endif
237
238#if defined(BROTLI_BUILD_BIG_ENDIAN)
239#define BROTLI_BIG_ENDIAN 1
240#elif defined(BROTLI_BUILD_LITTLE_ENDIAN)
241#define BROTLI_LITTLE_ENDIAN 1
242#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL)
243/* Just break elif chain. */
244#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
245#define BROTLI_LITTLE_ENDIAN 1
246#elif defined(_WIN32) || defined(BROTLI_TARGET_X64)
247/* Win32 & x64 can currently always be assumed to be little endian */
248#define BROTLI_LITTLE_ENDIAN 1
249#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
250#define BROTLI_BIG_ENDIAN 1
251#elif defined(BROTLI_X_BYTE_ORDER)
252#if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN
253#define BROTLI_LITTLE_ENDIAN 1
254#elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN
255#define BROTLI_BIG_ENDIAN 1
256#endif
257#endif /* BROTLI_X_BYTE_ORDER */
258
259#if !defined(BROTLI_LITTLE_ENDIAN)
260#define BROTLI_LITTLE_ENDIAN 0
261#endif
262
263#if !defined(BROTLI_BIG_ENDIAN)
264#define BROTLI_BIG_ENDIAN 0
265#endif
266
267#if defined(BROTLI_X_BYTE_ORDER)
268#undef BROTLI_X_BYTE_ORDER
269#undef BROTLI_X_LITTLE_ENDIAN
270#undef BROTLI_X_BIG_ENDIAN
271#endif
272
273#if defined(BROTLI_BUILD_NO_UNALIGNED_READ_FAST)
274#define BROTLI_UNALIGNED_READ_FAST (!!0)
275#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
276 defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \
277 defined(BROTLI_TARGET_RISCV64) || defined(BROTLI_TARGET_LOONGARCH64)
278/* These targets are known to generate efficient code for unaligned reads
279 * (e.g. a single instruction, not multiple 1-byte loads, shifted and or'd
280 * together). */
281#define BROTLI_UNALIGNED_READ_FAST (!!1)
282#else
283#define BROTLI_UNALIGNED_READ_FAST (!!0)
284#endif
285
286/* Portable unaligned memory access: read / write values via memcpy. */
287static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
288 uint16_t t;
289 memcpy(&t, p, sizeof t);
290 return t;
291}
292static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
293 uint32_t t;
294 memcpy(&t, p, sizeof t);
295 return t;
296}
297static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
298 uint64_t t;
299 memcpy(&t, p, sizeof t);
300 return t;
301}
302static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
303 memcpy(p, &v, sizeof v);
304}
305
306#if BROTLI_LITTLE_ENDIAN
307/* Straight endianness. Just read / write values. */
308#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16
309#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32
310#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64
311#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64
312#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */
313/* Explain compiler to byte-swap values. */
314#define BROTLI_BSWAP16_(V) ((uint16_t)( \
315 (((V) & 0xFFU) << 8) | \
316 (((V) >> 8) & 0xFFU)))
317static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
318 uint16_t value = BrotliUnalignedRead16(p);
319 return BROTLI_BSWAP16_(value);
320}
321#define BROTLI_BSWAP32_(V) ( \
322 (((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \
323 (((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU))
324static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
325 uint32_t value = BrotliUnalignedRead32(p);
326 return BROTLI_BSWAP32_(value);
327}
328#define BROTLI_BSWAP64_(V) ( \
329 (((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \
330 (((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \
331 (((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \
332 (((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU))
333static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
334 uint64_t value = BrotliUnalignedRead64(p);
335 return BROTLI_BSWAP64_(value);
336}
337static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
338 uint64_t value = BROTLI_BSWAP64_(v);
339 BrotliUnalignedWrite64(p, value);
340}
341#else /* BROTLI_LITTLE_ENDIAN */
342/* Read / store values byte-wise; hopefully compiler will understand. */
343static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
344 const uint8_t* in = (const uint8_t*)p;
345 return (uint16_t)(in[0] | (in[1] << 8));
346}
347static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
348 const uint8_t* in = (const uint8_t*)p;
349 uint32_t value = (uint32_t)(in[0]);
350 value |= (uint32_t)(in[1]) << 8;
351 value |= (uint32_t)(in[2]) << 16;
352 value |= (uint32_t)(in[3]) << 24;
353 return value;
354}
355static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
356 const uint8_t* in = (const uint8_t*)p;
357 uint64_t value = (uint64_t)(in[0]);
358 value |= (uint64_t)(in[1]) << 8;
359 value |= (uint64_t)(in[2]) << 16;
360 value |= (uint64_t)(in[3]) << 24;
361 value |= (uint64_t)(in[4]) << 32;
362 value |= (uint64_t)(in[5]) << 40;
363 value |= (uint64_t)(in[6]) << 48;
364 value |= (uint64_t)(in[7]) << 56;
365 return value;
366}
367static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
368 uint8_t* out = (uint8_t*)p;
369 out[0] = (uint8_t)v;
370 out[1] = (uint8_t)(v >> 8);
371 out[2] = (uint8_t)(v >> 16);
372 out[3] = (uint8_t)(v >> 24);
373 out[4] = (uint8_t)(v >> 32);
374 out[5] = (uint8_t)(v >> 40);
375 out[6] = (uint8_t)(v >> 48);
376 out[7] = (uint8_t)(v >> 56);
377}
378#endif /* BROTLI_LITTLE_ENDIAN */
379
380static BROTLI_INLINE void* BROTLI_UNALIGNED_LOAD_PTR(const void* p) {
381 void* v;
382 memcpy(&v, p, sizeof(void*));
383 return v;
384}
385
386static BROTLI_INLINE void BROTLI_UNALIGNED_STORE_PTR(void* p, const void* v) {
387 memcpy(p, &v, sizeof(void*));
388}
389
390/* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */
391#if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \
392 BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
393#define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x))
394#else
395#define BROTLI_IS_CONSTANT(x) (!!0)
396#endif
397
398#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
399#define BROTLI_HAS_UBFX (!!1)
400#else
401#define BROTLI_HAS_UBFX (!!0)
402#endif
403
404#if defined(BROTLI_ENABLE_LOG)
405#define BROTLI_LOG(x) printf x
406#else
407#define BROTLI_LOG(x)
408#endif
409
410#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
411#define BROTLI_ENABLE_DUMP_DEFAULT 1
412#define BROTLI_DCHECK(x) assert(x)
413#else
414#define BROTLI_ENABLE_DUMP_DEFAULT 0
415#define BROTLI_DCHECK(x)
416#endif
417
418#if !defined(BROTLI_ENABLE_DUMP)
419#define BROTLI_ENABLE_DUMP BROTLI_ENABLE_DUMP_DEFAULT
420#endif
421
422#if BROTLI_ENABLE_DUMP
423static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
424 fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
425 fflush(stderr);
426}
427#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
428#else
429#define BROTLI_DUMP() (void)(0)
430#endif
431
432/* BrotliRBit assumes brotli_reg_t fits native CPU register type. */
433#if (BROTLI_64_BITS == BROTLI_TARGET_64_BITS)
434/* TODO(eustas): add appropriate icc/sunpro/arm/ibm/ti checks. */
435#if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \
436 !defined(BROTLI_BUILD_NO_RBIT)
437#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
438/* TODO(eustas): detect ARMv6T2 and enable this code for it. */
439static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) {
440 brotli_reg_t output;
441 __asm__("rbit %0, %1\n" : "=r"(output) : "r"(input));
442 return output;
443}
444#define BROTLI_RBIT(x) BrotliRBit(x)
445#endif /* armv7 / armv8 */
446#endif /* gcc || clang */
447#endif /* brotli_reg_t is native */
448#if !defined(BROTLI_RBIT)
449static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ }
450#endif /* BROTLI_RBIT */
451
452#define BROTLI_REPEAT_4(X) {X; X; X; X;}
453#define BROTLI_REPEAT_5(X) {X; X; X; X; X;}
454#define BROTLI_REPEAT_6(X) {X; X; X; X; X; X;}
455
456#define BROTLI_UNUSED(X) (void)(X)
457
458#define BROTLI_MIN_MAX(T) \
459 static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \
460 static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; }
461BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int)
462BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t)
463#undef BROTLI_MIN_MAX
464#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B)))
465#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B)))
466
467#define BROTLI_SWAP(T, A, I, J) { \
468 T __brotli_swap_tmp = (A)[(I)]; \
469 (A)[(I)] = (A)[(J)]; \
470 (A)[(J)] = __brotli_swap_tmp; \
471}
472
473#if BROTLI_64_BITS
474#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \
475 BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
476#define BROTLI_TZCNT64 __builtin_ctzll
477#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
478#if defined(BROTLI_TARGET_X64)
479#define BROTLI_TZCNT64 _tzcnt_u64
480#else /* BROTLI_TARGET_X64 */
481static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) {
482 uint32_t lsb;
483 _BitScanForward64(&lsb, x);
484 return lsb;
485}
486#define BROTLI_TZCNT64 BrotliBsf64Msvc
487#endif /* BROTLI_TARGET_X64 */
488#endif /* __builtin_ctzll */
489#endif /* BROTLI_64_BITS */
490
491#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \
492 BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
493#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x))
494#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
495static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) {
496 unsigned long msb;
497 _BitScanReverse(&msb, x);
498 return (uint32_t)msb;
499}
500#define BROTLI_BSR32 BrotliBsr32Msvc
501#endif /* __builtin_clz */
502
503/* Default brotli_alloc_func */
504BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size);
505
506/* Default brotli_free_func */
507BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address);
508
509BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) {
510 BROTLI_UNUSED(&BrotliSuppressUnusedFunctions);
511 BROTLI_UNUSED(&BrotliUnalignedRead16);
512 BROTLI_UNUSED(&BrotliUnalignedRead32);
513 BROTLI_UNUSED(&BrotliUnalignedRead64);
514 BROTLI_UNUSED(&BrotliUnalignedWrite64);
515 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE);
516 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE);
517 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE);
518 BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE);
519 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD_PTR);
520 BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE_PTR);
521 BROTLI_UNUSED(&BrotliRBit);
522 BROTLI_UNUSED(&brotli_min_double);
523 BROTLI_UNUSED(&brotli_max_double);
524 BROTLI_UNUSED(&brotli_min_float);
525 BROTLI_UNUSED(&brotli_max_float);
526 BROTLI_UNUSED(&brotli_min_int);
527 BROTLI_UNUSED(&brotli_max_int);
528 BROTLI_UNUSED(&brotli_min_size_t);
529 BROTLI_UNUSED(&brotli_max_size_t);
530 BROTLI_UNUSED(&brotli_min_uint32_t);
531 BROTLI_UNUSED(&brotli_max_uint32_t);
532 BROTLI_UNUSED(&brotli_min_uint8_t);
533 BROTLI_UNUSED(&brotli_max_uint8_t);
534 BROTLI_UNUSED(&BrotliDefaultAllocFunc);
535 BROTLI_UNUSED(&BrotliDefaultFreeFunc);
536#if BROTLI_ENABLE_DUMP
537 BROTLI_UNUSED(&BrotliDump);
538#endif
539}
540
541#endif /* BROTLI_COMMON_PLATFORM_H_ */
BrotliDefaultAllocFunc
void * BrotliDefaultAllocFunc(void *opaque, size_t size)
Definition platform.c:13
BROTLI_COMMON_API
#define BROTLI_COMMON_API
Definition port.h:283
input
#define input(b, o, c, n, m)
Definition compress42.c:610
output
#define output(b, o, c, n)
Definition compress42.c:592
brotli_reg_t
#define brotli_reg_t
Definition platform.h:243
BrotliSuppressUnusedFunctions
BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void)
Definition platform.h:564
BrotliDefaultFreeFunc
BROTLI_COMMON_API void BrotliDefaultFreeFunc(void *opaque, void *address)
Definition platform.c:19
size
size_t size
Definition platform.h:559
BROTLI_UNUSED_FUNCTION
#define BROTLI_UNUSED_FUNCTION
Definition platform.h:183
BROTLI_UNUSED
#define BROTLI_UNUSED(X)
Definition platform.h:511
BROTLI_INLINE
#define BROTLI_INLINE
Definition platform.h:136
BROTLI_MIN_MAX
#define BROTLI_MIN_MAX(T)
Definition platform.h:513
f
#define f(i)
Definition sha256.c:46
in
const lzma_allocator const uint8_t * in
Definition block.h:527
out
const lzma_allocator const uint8_t size_t uint8_t * out
Definition block.h:528
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