/* Copyright 2015 Google Inc. All Rights Reserved. | |
Distributed under MIT license. | |
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT | |
*/ | |
/* Macros for compiler / platform specific features and build options. | |
Build options are: | |
* BROTLI_BUILD_32_BIT disables 64-bit optimizations | |
* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations | |
* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations | |
* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations | |
* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations | |
* BROTLI_BUILD_MODERN_COMPILER forces to use modern compilers built-ins, | |
features and attributes | |
* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned | |
read and overlapping memcpy; this reduces decompression speed by 5% | |
* BROTLI_DEBUG dumps file name and line number when decoder detects stream | |
or memory error | |
* BROTLI_ENABLE_LOG enables asserts and dumps various state information | |
*/ | |
#ifndef BROTLI_DEC_PORT_H_ | |
#define BROTLI_DEC_PORT_H_ | |
#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG) | |
#include <assert.h> | |
#include <stdio.h> | |
#endif | |
#include "../common/port.h" | |
#if defined(__arm__) || defined(__thumb__) || \ | |
defined(_M_ARM) || defined(_M_ARMT) | |
#define BROTLI_TARGET_ARM | |
#if (defined(__ARM_ARCH) && (__ARM_ARCH >= 7)) || \ | |
(defined(M_ARM) && (M_ARM >= 7)) | |
#define BROTLI_TARGET_ARMV7 | |
#endif /* ARMv7 */ | |
#if defined(__aarch64__) | |
#define BROTLI_TARGET_ARMV8 | |
#endif /* ARMv8 */ | |
#endif /* ARM */ | |
#if defined(__i386) || defined(_M_IX86) | |
#define BROTLI_TARGET_X86 | |
#endif | |
#if defined(__x86_64__) || defined(_M_X64) | |
#define BROTLI_TARGET_X64 | |
#endif | |
#if defined(__PPC64__) | |
#define BROTLI_TARGET_POWERPC64 | |
#endif | |
#ifdef BROTLI_BUILD_PORTABLE | |
#define BROTLI_ALIGNED_READ (!!1) | |
#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \ | |
defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8) | |
/* Allow unaligned read only for whitelisted CPUs. */ | |
#define BROTLI_ALIGNED_READ (!!0) | |
#else | |
#define BROTLI_ALIGNED_READ (!!1) | |
#endif | |
/* IS_CONSTANT macros returns true for compile-time constant expressions. */ | |
#if BROTLI_MODERN_COMPILER || __has_builtin(__builtin_constant_p) | |
#define IS_CONSTANT(x) (!!__builtin_constant_p(x)) | |
#else | |
#define IS_CONSTANT(x) (!!0) | |
#endif | |
#ifdef BROTLI_ENABLE_LOG | |
#define BROTLI_DCHECK(x) assert(x) | |
#define BROTLI_LOG(x) printf x | |
#else | |
#define BROTLI_DCHECK(x) | |
#define BROTLI_LOG(x) | |
#endif | |
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) | |
static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) { | |
fprintf(stderr, "%s:%d (%s)\n", f, l, fn); | |
fflush(stderr); | |
} | |
#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__) | |
#else | |
#define BROTLI_DUMP() (void)(0) | |
#endif | |
#if defined(BROTLI_BUILD_64_BIT) | |
#define BROTLI_64_BITS 1 | |
#elif defined(BROTLI_BUILD_32_BIT) | |
#define BROTLI_64_BITS 0 | |
#elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8) || \ | |
defined(BROTLI_TARGET_POWERPC64) | |
#define BROTLI_64_BITS 1 | |
#else | |
#define BROTLI_64_BITS 0 | |
#endif | |
#if defined(BROTLI_BUILD_BIG_ENDIAN) | |
#define BROTLI_LITTLE_ENDIAN 0 | |
#define BROTLI_BIG_ENDIAN 1 | |
#elif defined(BROTLI_BUILD_LITTLE_ENDIAN) | |
#define BROTLI_LITTLE_ENDIAN 1 | |
#define BROTLI_BIG_ENDIAN 0 | |
#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL) | |
#define BROTLI_LITTLE_ENDIAN 0 | |
#define BROTLI_BIG_ENDIAN 0 | |
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) | |
#define BROTLI_LITTLE_ENDIAN 1 | |
#define BROTLI_BIG_ENDIAN 0 | |
#elif defined(_WIN32) | |
/* Win32 can currently always be assumed to be little endian */ | |
#define BROTLI_LITTLE_ENDIAN 1 | |
#define BROTLI_BIG_ENDIAN 0 | |
#else | |
#if (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)) | |
#define BROTLI_BIG_ENDIAN 1 | |
#else | |
#define BROTLI_BIG_ENDIAN 0 | |
#endif | |
#define BROTLI_LITTLE_ENDIAN 0 | |
#endif | |
#define BROTLI_REPEAT(N, X) { \ | |
if ((N & 1) != 0) {X;} \ | |
if ((N & 2) != 0) {X; X;} \ | |
if ((N & 4) != 0) {X; X; X; X;} \ | |
} | |
#if BROTLI_MODERN_COMPILER || defined(__llvm__) | |
#if defined(BROTLI_TARGET_ARMV7) | |
static BROTLI_INLINE unsigned BrotliRBit(unsigned input) { | |
unsigned output; | |
__asm__("rbit %0, %1\n" : "=r"(output) : "r"(input)); | |
return output; | |
} | |
#define BROTLI_RBIT(x) BrotliRBit(x) | |
#endif /* armv7 */ | |
#endif /* gcc || clang */ | |
#if defined(BROTLI_TARGET_ARM) | |
#define BROTLI_HAS_UBFX (!!1) | |
#else | |
#define BROTLI_HAS_UBFX (!!0) | |
#endif | |
#define BROTLI_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L) | |
#define BROTLI_FREE(S, X) { \ | |
S->free_func(S->memory_manager_opaque, X); \ | |
X = NULL; \ | |
} | |
#endif /* BROTLI_DEC_PORT_H_ */ |