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Diffstat (limited to 'modules/brotli/common/platform.h')
| -rw-r--r-- | modules/brotli/common/platform.h | 594 |
1 files changed, 594 insertions, 0 deletions
diff --git a/modules/brotli/common/platform.h b/modules/brotli/common/platform.h new file mode 100644 index 0000000000..f5ca4435bc --- /dev/null +++ b/modules/brotli/common/platform.h @@ -0,0 +1,594 @@ +/* Copyright 2016 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_PORTABLE disables dangerous optimizations, like unaligned + read and overlapping memcpy; this reduces decompression speed by 5% + * BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs + * 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_COMMON_PLATFORM_H_ +#define BROTLI_COMMON_PLATFORM_H_ + +#include <string.h> /* memcpy */ + +#include <brotli/port.h> +#include <brotli/types.h> + +#if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__) +#include <endian.h> +#elif defined(OS_FREEBSD) +#include <machine/endian.h> +#elif defined(OS_MACOSX) +#include <machine/endian.h> +/* Let's try and follow the Linux convention */ +#define BROTLI_X_BYTE_ORDER BYTE_ORDER +#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN +#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN +#endif + +#if BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#include <intrin.h> +#endif + +#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG) +#include <assert.h> +#include <stdio.h> +#endif + +/* The following macros were borrowed from https://github.com/nemequ/hedley + * with permission of original author - Evan Nemerson <evan@nemerson.com> */ + +/* >>> >>> >>> hedley macros */ + +/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable + compilers. + +To apply compiler hint, enclose the branching condition into macros, like this: + + if (BROTLI_PREDICT_TRUE(zero == 0)) { + // main execution path + } else { + // compiler should place this code outside of main execution path + } + +OR: + + if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) { + // compiler should place this code outside of main execution path + } + +*/ +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(7, 3, 0) || \ + BROTLI_TINYC_VERSION_CHECK(0, 9, 27) +#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1)) +#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0)) +#else +#define BROTLI_PREDICT_FALSE(x) (x) +#define BROTLI_PREDICT_TRUE(x) (x) +#endif + +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \ + !defined(__cplusplus) +#define BROTLI_RESTRICT restrict +#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \ + BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus)) +#define BROTLI_RESTRICT __restrict +#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus) +#define BROTLI_RESTRICT _Restrict +#else +#define BROTLI_RESTRICT +#endif + +#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \ + (defined(__cplusplus) && (__cplusplus >= 199711L)) +#define BROTLI_MAYBE_INLINE inline +#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \ + BROTLI_ARM_VERSION_CHECK(6, 2, 0) +#define BROTLI_MAYBE_INLINE __inline__ +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0) +#define BROTLI_MAYBE_INLINE __inline +#else +#define BROTLI_MAYBE_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__)) +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline +#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;") +#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced") +#else +#define BROTLI_INLINE BROTLI_MAYBE_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) +#define BROTLI_NOINLINE __attribute__((__noinline__)) +#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0) +#define BROTLI_NOINLINE __declspec(noinline) +#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0) +#define BROTLI_NOINLINE _Pragma("noinline") +#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus) +#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;") +#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) +#define BROTLI_NOINLINE _Pragma("inline=never") +#else +#define BROTLI_NOINLINE +#endif + +/* BROTLI_INTERNAL could be defined to override visibility, e.g. for tests. */ +#if !defined(BROTLI_INTERNAL) +#if defined(_WIN32) || defined(__CYGWIN__) +#define BROTLI_INTERNAL +#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && \ + defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__)) +#define BROTLI_INTERNAL __attribute__ ((visibility ("hidden"))) +#else +#define BROTLI_INTERNAL +#endif +#endif + +/* <<< <<< <<< end of hedley macros. */ + +#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused)) +#else +#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) +#define BROTLI_ALIGNED(N) __attribute__((aligned(N))) +#else +#define BROTLI_ALIGNED(N) +#endif + +#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \ + (defined(M_ARM) && (M_ARM == 7)) +#define BROTLI_TARGET_ARMV7 +#endif /* ARMv7 */ + +#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \ + defined(__aarch64__) || defined(__ARM64_ARCH_8__) +#define BROTLI_TARGET_ARMV8_ANY + +#if defined(__ARM_32BIT_STATE) +#define BROTLI_TARGET_ARMV8_32 +#elif defined(__ARM_64BIT_STATE) +#define BROTLI_TARGET_ARMV8_64 +#endif + +#endif /* ARMv8 */ + +#if defined(__ARM_NEON__) || defined(__ARM_NEON) +#define BROTLI_TARGET_NEON +#endif + +#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 + +#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64 +#define BROTLI_TARGET_RISCV64 +#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_64) || \ + defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64) +#define BROTLI_64_BITS 1 +#else +#define BROTLI_64_BITS 0 +#endif + +#if (BROTLI_64_BITS) +#define brotli_reg_t uint64_t +#else +#define brotli_reg_t uint32_t +#endif + +#if defined(BROTLI_BUILD_BIG_ENDIAN) +#define BROTLI_BIG_ENDIAN 1 +#elif defined(BROTLI_BUILD_LITTLE_ENDIAN) +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL) +/* Just break elif chain. */ +#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(_WIN32) || defined(BROTLI_TARGET_X64) +/* Win32 & x64 can currently always be assumed to be little endian */ +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) +#define BROTLI_BIG_ENDIAN 1 +#elif defined(BROTLI_X_BYTE_ORDER) +#if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN +#define BROTLI_LITTLE_ENDIAN 1 +#elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN +#define BROTLI_BIG_ENDIAN 1 +#endif +#endif /* BROTLI_X_BYTE_ORDER */ + +#if !defined(BROTLI_LITTLE_ENDIAN) +#define BROTLI_LITTLE_ENDIAN 0 +#endif + +#if !defined(BROTLI_BIG_ENDIAN) +#define BROTLI_BIG_ENDIAN 0 +#endif + +#if defined(BROTLI_X_BYTE_ORDER) +#undef BROTLI_X_BYTE_ORDER +#undef BROTLI_X_LITTLE_ENDIAN +#undef BROTLI_X_BIG_ENDIAN +#endif + +#if defined(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_ANY) || \ + defined(BROTLI_TARGET_RISCV64) +/* Allow unaligned read only for white-listed CPUs. */ +#define BROTLI_ALIGNED_READ (!!0) +#else +#define BROTLI_ALIGNED_READ (!!1) +#endif + +#if BROTLI_ALIGNED_READ +/* Portable unaligned memory access: read / write values via memcpy. */ +static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { + uint16_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { + uint32_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + uint64_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + memcpy(p, &v, sizeof v); +} +#else /* BROTLI_ALIGNED_READ */ +/* Unaligned memory access is allowed: just cast pointer to requested type. */ +#if BROTLI_SANITIZED +/* Consider we have an unaligned load/store of 4 bytes from address 0x...05. + AddressSanitizer will treat it as a 3-byte access to the range 05:07 and + will miss a bug if 08 is the first unaddressable byte. + ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will + miss a race between this access and some other accesses to 08. + MemorySanitizer will correctly propagate the shadow on unaligned stores + and correctly report bugs on unaligned loads, but it may not properly + update and report the origin of the uninitialized memory. + For all three tools, replacing an unaligned access with a tool-specific + callback solves the problem. */ +#if defined(__cplusplus) +extern "C" { +#endif /* __cplusplus */ + uint16_t __sanitizer_unaligned_load16(const void* p); + uint32_t __sanitizer_unaligned_load32(const void* p); + uint64_t __sanitizer_unaligned_load64(const void* p); + void __sanitizer_unaligned_store64(void* p, uint64_t v); +#if defined(__cplusplus) +} /* extern "C" */ +#endif /* __cplusplus */ +#define BrotliUnalignedRead16 __sanitizer_unaligned_load16 +#define BrotliUnalignedRead32 __sanitizer_unaligned_load32 +#define BrotliUnalignedRead64 __sanitizer_unaligned_load64 +#define BrotliUnalignedWrite64 __sanitizer_unaligned_store64 +#else /* BROTLI_SANITIZED */ +static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { + return *(const uint16_t*)p; +} +static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { + return *(const uint32_t*)p; +} +#if (BROTLI_64_BITS) +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + return *(const uint64_t*)p; +} +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + *(uint64_t*)p = v; +} +#else /* BROTLI_64_BITS */ +/* Avoid emitting LDRD / STRD, which require properly aligned address. */ +/* If __attribute__(aligned) is available, use that. Otherwise, memcpy. */ + +#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) +typedef BROTLI_ALIGNED(1) uint64_t brotli_unaligned_uint64_t; + +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + return (uint64_t) ((const brotli_unaligned_uint64_t*) p)[0]; +} +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p; + dwords[0] = (brotli_unaligned_uint64_t) v; +} +#else /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */ +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + uint64_t v; + memcpy(&v, p, sizeof(uint64_t)); + return v; +} + +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + memcpy(p, &v, sizeof(uint64_t)); +} +#endif /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */ +#endif /* BROTLI_64_BITS */ +#endif /* BROTLI_SANITIZED */ +#endif /* BROTLI_ALIGNED_READ */ + +#if BROTLI_LITTLE_ENDIAN +/* Straight endianness. Just read / write values. */ +#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16 +#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32 +#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64 +#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64 +#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */ +/* Explain compiler to byte-swap values. */ +#define BROTLI_BSWAP16_(V) ((uint16_t)( \ + (((V) & 0xFFU) << 8) | \ + (((V) >> 8) & 0xFFU))) +static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { + uint16_t value = BrotliUnalignedRead16(p); + return BROTLI_BSWAP16_(value); +} +#define BROTLI_BSWAP32_(V) ( \ + (((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \ + (((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU)) +static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { + uint32_t value = BrotliUnalignedRead32(p); + return BROTLI_BSWAP32_(value); +} +#define BROTLI_BSWAP64_(V) ( \ + (((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \ + (((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \ + (((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \ + (((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU)) +static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { + uint64_t value = BrotliUnalignedRead64(p); + return BROTLI_BSWAP64_(value); +} +static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { + uint64_t value = BROTLI_BSWAP64_(v); + BrotliUnalignedWrite64(p, value); +} +#else /* BROTLI_LITTLE_ENDIAN */ +/* Read / store values byte-wise; hopefully compiler will understand. */ +static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + return (uint16_t)(in[0] | (in[1] << 8)); +} +static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + uint32_t value = (uint32_t)(in[0]); + value |= (uint32_t)(in[1]) << 8; + value |= (uint32_t)(in[2]) << 16; + value |= (uint32_t)(in[3]) << 24; + return value; +} +static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + uint64_t value = (uint64_t)(in[0]); + value |= (uint64_t)(in[1]) << 8; + value |= (uint64_t)(in[2]) << 16; + value |= (uint64_t)(in[3]) << 24; + value |= (uint64_t)(in[4]) << 32; + value |= (uint64_t)(in[5]) << 40; + value |= (uint64_t)(in[6]) << 48; + value |= (uint64_t)(in[7]) << 56; + return value; +} +static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { + uint8_t* out = (uint8_t*)p; + out[0] = (uint8_t)v; + out[1] = (uint8_t)(v >> 8); + out[2] = (uint8_t)(v >> 16); + out[3] = (uint8_t)(v >> 24); + out[4] = (uint8_t)(v >> 32); + out[5] = (uint8_t)(v >> 40); + out[6] = (uint8_t)(v >> 48); + out[7] = (uint8_t)(v >> 56); +} +#endif /* BROTLI_LITTLE_ENDIAN */ + +/* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */ +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x)) +#else +#define BROTLI_IS_CONSTANT(x) (!!0) +#endif + +#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) +#define BROTLI_HAS_UBFX (!!1) +#else +#define BROTLI_HAS_UBFX (!!0) +#endif + +#if defined(BROTLI_ENABLE_LOG) +#define BROTLI_LOG(x) printf x +#else +#define BROTLI_LOG(x) +#endif + +#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) +#define BROTLI_DCHECK(x) assert(x) +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_DCHECK(x) +#define BROTLI_DUMP() (void)(0) +#endif + +/* TODO: add appropriate icc/sunpro/arm/ibm/ti checks. */ +#if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \ + !defined(BROTLI_BUILD_NO_RBIT) +#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) +/* TODO: detect ARMv6T2 and enable this code for it. */ +static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) { + brotli_reg_t output; + __asm__("rbit %0, %1\n" : "=r"(output) : "r"(input)); + return output; +} +#define BROTLI_RBIT(x) BrotliRBit(x) +#endif /* armv7 / armv8 */ +#endif /* gcc || clang */ +#if !defined(BROTLI_RBIT) +static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ } +#endif /* BROTLI_RBIT */ + +#define BROTLI_REPEAT(N, X) { \ + if ((N & 1) != 0) {X;} \ + if ((N & 2) != 0) {X; X;} \ + if ((N & 4) != 0) {X; X; X; X;} \ +} + +#define BROTLI_UNUSED(X) (void)(X) + +#define BROTLI_MIN_MAX(T) \ + static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \ + static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; } +BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int) +BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t) +#undef BROTLI_MIN_MAX +#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B))) +#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B))) + +#define BROTLI_SWAP(T, A, I, J) { \ + T __brotli_swap_tmp = (A)[(I)]; \ + (A)[(I)] = (A)[(J)]; \ + (A)[(J)] = __brotli_swap_tmp; \ +} + +#if BROTLI_64_BITS +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_TZCNT64 __builtin_ctzll +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#if defined(BROTLI_TARGET_X64) +#define BROTLI_TZCNT64 _tzcnt_u64 +#else /* BROTLI_TARGET_X64 */ +static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) { + uint32_t lsb; + _BitScanForward64(&lsb, x); + return lsb; +} +#define BROTLI_TZCNT64 BrotliBsf64Msvc +#endif /* BROTLI_TARGET_X64 */ +#endif /* __builtin_ctzll */ +#endif /* BROTLI_64_BITS */ + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x)) +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) { + unsigned long msb; + _BitScanReverse(&msb, x); + return (uint32_t)msb; +} +#define BROTLI_BSR32 BrotliBsr32Msvc +#endif /* __builtin_clz */ + +/* Default brotli_alloc_func */ +BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size); + +/* Default brotli_free_func */ +BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address); + +BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) { + BROTLI_UNUSED(&BrotliSuppressUnusedFunctions); + BROTLI_UNUSED(&BrotliUnalignedRead16); + BROTLI_UNUSED(&BrotliUnalignedRead32); + BROTLI_UNUSED(&BrotliUnalignedRead64); + BROTLI_UNUSED(&BrotliUnalignedWrite64); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE); + BROTLI_UNUSED(&BrotliRBit); + BROTLI_UNUSED(&brotli_min_double); + BROTLI_UNUSED(&brotli_max_double); + BROTLI_UNUSED(&brotli_min_float); + BROTLI_UNUSED(&brotli_max_float); + BROTLI_UNUSED(&brotli_min_int); + BROTLI_UNUSED(&brotli_max_int); + BROTLI_UNUSED(&brotli_min_size_t); + BROTLI_UNUSED(&brotli_max_size_t); + BROTLI_UNUSED(&brotli_min_uint32_t); + BROTLI_UNUSED(&brotli_max_uint32_t); + BROTLI_UNUSED(&brotli_min_uint8_t); + BROTLI_UNUSED(&brotli_max_uint8_t); + BROTLI_UNUSED(&BrotliDefaultAllocFunc); + BROTLI_UNUSED(&BrotliDefaultFreeFunc); +#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) + BROTLI_UNUSED(&BrotliDump); +#endif +} + +#endif /* BROTLI_COMMON_PLATFORM_H_ */ |