577 lines
20 KiB
C++
577 lines
20 KiB
C++
/* Copyright 2016 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Macros for compiler / platform specific features and build options.
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Build options are:
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* BROTLI_BUILD_32_BIT disables 64-bit optimizations
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* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
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* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
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* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
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* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
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* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
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read and overlapping memcpy; this reduces decompression speed by 5%
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* BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
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* BROTLI_DEBUG dumps file name and line number when decoder detects stream
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or memory error
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* BROTLI_ENABLE_LOG enables asserts and dumps various state information
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*/
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#ifndef BROTLI_COMMON_PLATFORM_H_
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#define BROTLI_COMMON_PLATFORM_H_
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#include <string.h> /* memcpy */
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#include <brotli/port.h>
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#include <brotli/types.h>
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#if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__)
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#include <endian.h>
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#elif defined(OS_FREEBSD)
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#include <machine/endian.h>
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#elif defined(OS_MACOSX)
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#include <machine/endian.h>
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/* Let's try and follow the Linux convention */
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#define BROTLI_X_BYTE_ORDER BYTE_ORDER
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#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN
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#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
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#endif
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#if BROTLI_MSVC_VERSION_CHECK(18, 0, 0)
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#include <intrin.h>
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#endif
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#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
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#include <assert.h>
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#include <stdio.h>
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#endif
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/* The following macros were borrowed from https://github.com/nemequ/hedley
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* with permission of original author - Evan Nemerson <evan@nemerson.com> */
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/* >>> >>> >>> hedley macros */
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/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable
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compilers.
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To apply compiler hint, enclose the branching condition into macros, like this:
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if (BROTLI_PREDICT_TRUE(zero == 0)) {
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// main execution path
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} else {
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// compiler should place this code outside of main execution path
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}
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OR:
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if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) {
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// compiler should place this code outside of main execution path
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}
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*/
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#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \
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BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
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BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \
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BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
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BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
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BROTLI_TI_VERSION_CHECK(7, 3, 0) || \
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BROTLI_TINYC_VERSION_CHECK(0, 9, 27)
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#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
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#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0))
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#else
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#define BROTLI_PREDICT_FALSE(x) (x)
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#define BROTLI_PREDICT_TRUE(x) (x)
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#endif
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
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!defined(__cplusplus)
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#define BROTLI_RESTRICT restrict
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#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \
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BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \
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BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
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BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
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BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
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BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \
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BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
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BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \
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(BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus))
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#define BROTLI_RESTRICT __restrict
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#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus)
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#define BROTLI_RESTRICT _Restrict
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#else
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#define BROTLI_RESTRICT
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#endif
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#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
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(defined(__cplusplus) && (__cplusplus >= 199711L))
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#define BROTLI_MAYBE_INLINE inline
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#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \
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BROTLI_ARM_VERSION_CHECK(6, 2, 0)
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#define BROTLI_MAYBE_INLINE __inline__
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#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \
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BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0)
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#define BROTLI_MAYBE_INLINE __inline
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#else
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#define BROTLI_MAYBE_INLINE
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#endif
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#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \
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BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
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BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
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BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
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BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
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BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
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(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
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#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__))
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#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
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#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline
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#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus)
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#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
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#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
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#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced")
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#else
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#define BROTLI_INLINE BROTLI_MAYBE_INLINE
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#endif
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#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \
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BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
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BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
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BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
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BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
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BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
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(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
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#define BROTLI_NOINLINE __attribute__((__noinline__))
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#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0)
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#define BROTLI_NOINLINE __declspec(noinline)
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#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0)
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#define BROTLI_NOINLINE _Pragma("noinline")
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#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus)
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#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;")
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#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
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#define BROTLI_NOINLINE _Pragma("inline=never")
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#else
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#define BROTLI_NOINLINE
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#endif
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/* <<< <<< <<< end of hedley macros. */
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#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \
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BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
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#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused))
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#else
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#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE
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#endif
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#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
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#define BROTLI_ALIGNED(N) __attribute__((aligned(N)))
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#else
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#define BROTLI_ALIGNED(N)
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#endif
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#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \
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(defined(M_ARM) && (M_ARM == 7))
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#define BROTLI_TARGET_ARMV7
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#endif /* ARMv7 */
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#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \
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defined(__aarch64__) || defined(__ARM64_ARCH_8__)
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#define BROTLI_TARGET_ARMV8_ANY
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#if defined(__ARM_32BIT_STATE)
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#define BROTLI_TARGET_ARMV8_32
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#elif defined(__ARM_64BIT_STATE)
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#define BROTLI_TARGET_ARMV8_64
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#endif
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#endif /* ARMv8 */
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#if defined(__ARM_NEON__) || defined(__ARM_NEON)
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#define BROTLI_TARGET_NEON
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#endif
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#if defined(__i386) || defined(_M_IX86)
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#define BROTLI_TARGET_X86
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#endif
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#if defined(__x86_64__) || defined(_M_X64)
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#define BROTLI_TARGET_X64
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#endif
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#if defined(__PPC64__)
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#define BROTLI_TARGET_POWERPC64
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#endif
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#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
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#define BROTLI_TARGET_RISCV64
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#endif
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#if defined(BROTLI_BUILD_64_BIT)
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#define BROTLI_64_BITS 1
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#elif defined(BROTLI_BUILD_32_BIT)
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#define BROTLI_64_BITS 0
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#elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \
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defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64)
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#define BROTLI_64_BITS 1
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#else
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#define BROTLI_64_BITS 0
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#endif
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#if (BROTLI_64_BITS)
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#define brotli_reg_t uint64_t
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#else
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#define brotli_reg_t uint32_t
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#endif
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#if defined(BROTLI_BUILD_BIG_ENDIAN)
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#define BROTLI_BIG_ENDIAN 1
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#elif defined(BROTLI_BUILD_LITTLE_ENDIAN)
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#define BROTLI_LITTLE_ENDIAN 1
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#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL)
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/* Just break elif chain. */
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#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
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#define BROTLI_LITTLE_ENDIAN 1
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#elif defined(_WIN32) || defined(BROTLI_TARGET_X64)
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/* Win32 & x64 can currently always be assumed to be little endian */
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#define BROTLI_LITTLE_ENDIAN 1
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#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
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#define BROTLI_BIG_ENDIAN 1
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#elif defined(BROTLI_X_BYTE_ORDER)
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#if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN
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#define BROTLI_LITTLE_ENDIAN 1
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#elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN
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#define BROTLI_BIG_ENDIAN 1
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#endif
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#endif /* BROTLI_X_BYTE_ORDER */
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#if !defined(BROTLI_LITTLE_ENDIAN)
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#define BROTLI_LITTLE_ENDIAN 0
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#endif
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#if !defined(BROTLI_BIG_ENDIAN)
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#define BROTLI_BIG_ENDIAN 0
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#endif
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#if defined(BROTLI_X_BYTE_ORDER)
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#undef BROTLI_X_BYTE_ORDER
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#undef BROTLI_X_LITTLE_ENDIAN
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#undef BROTLI_X_BIG_ENDIAN
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#endif
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#if defined(BROTLI_BUILD_PORTABLE)
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#define BROTLI_ALIGNED_READ (!!1)
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#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
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defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \
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defined(BROTLI_TARGET_RISCV64)
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/* Allow unaligned read only for white-listed CPUs. */
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#define BROTLI_ALIGNED_READ (!!0)
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#else
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#define BROTLI_ALIGNED_READ (!!1)
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#endif
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#if BROTLI_ALIGNED_READ
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/* Portable unaligned memory access: read / write values via memcpy. */
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static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
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uint16_t t;
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memcpy(&t, p, sizeof t);
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return t;
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}
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static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
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uint32_t t;
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memcpy(&t, p, sizeof t);
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return t;
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}
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static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
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uint64_t t;
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memcpy(&t, p, sizeof t);
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return t;
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}
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static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
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memcpy(p, &v, sizeof v);
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}
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#else /* BROTLI_ALIGNED_READ */
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/* Unaligned memory access is allowed: just cast pointer to requested type. */
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#if BROTLI_SANITIZED
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/* Consider we have an unaligned load/store of 4 bytes from address 0x...05.
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AddressSanitizer will treat it as a 3-byte access to the range 05:07 and
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will miss a bug if 08 is the first unaddressable byte.
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ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will
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miss a race between this access and some other accesses to 08.
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MemorySanitizer will correctly propagate the shadow on unaligned stores
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and correctly report bugs on unaligned loads, but it may not properly
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update and report the origin of the uninitialized memory.
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For all three tools, replacing an unaligned access with a tool-specific
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callback solves the problem. */
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#if defined(__cplusplus)
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extern "C" {
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#endif /* __cplusplus */
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uint16_t __sanitizer_unaligned_load16(const void* p);
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uint32_t __sanitizer_unaligned_load32(const void* p);
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uint64_t __sanitizer_unaligned_load64(const void* p);
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void __sanitizer_unaligned_store64(void* p, uint64_t v);
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#if defined(__cplusplus)
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} /* extern "C" */
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#endif /* __cplusplus */
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#define BrotliUnalignedRead16 __sanitizer_unaligned_load16
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#define BrotliUnalignedRead32 __sanitizer_unaligned_load32
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#define BrotliUnalignedRead64 __sanitizer_unaligned_load64
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#define BrotliUnalignedWrite64 __sanitizer_unaligned_store64
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#else /* BROTLI_SANITIZED */
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static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
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return *(const uint16_t*)p;
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}
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static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
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return *(const uint32_t*)p;
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}
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#if (BROTLI_64_BITS)
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static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
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return *(const uint64_t*)p;
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}
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static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
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*(uint64_t*)p = v;
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}
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#else /* BROTLI_64_BITS */
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/* Avoid emitting LDRD / STRD, which require properly aligned address. */
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/* If __attribute__(aligned) is available, use that. Otherwise, memcpy. */
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#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
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typedef BROTLI_ALIGNED(1) uint64_t brotli_unaligned_uint64_t;
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static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
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return (uint64_t) ((const brotli_unaligned_uint64_t*) p)[0];
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}
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static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
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brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p;
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dwords[0] = (brotli_unaligned_uint64_t) v;
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}
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#else /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
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static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
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uint64_t v;
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memcpy(&v, p, sizeof(uint64_t));
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return v;
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}
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static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
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memcpy(p, &v, sizeof(uint64_t));
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}
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#endif /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
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#endif /* BROTLI_64_BITS */
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#endif /* BROTLI_SANITIZED */
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#endif /* BROTLI_ALIGNED_READ */
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#if BROTLI_LITTLE_ENDIAN
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/* Straight endianness. Just read / write values. */
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#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16
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#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32
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#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64
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#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64
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#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */
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/* Explain compiler to byte-swap values. */
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#define BROTLI_BSWAP16_(V) ((uint16_t)( \
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(((V) & 0xFFU) << 8) | \
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(((V) >> 8) & 0xFFU)))
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static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
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uint16_t value = BrotliUnalignedRead16(p);
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return BROTLI_BSWAP16_(value);
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}
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#define BROTLI_BSWAP32_(V) ( \
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(((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \
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(((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU))
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static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
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uint32_t value = BrotliUnalignedRead32(p);
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return BROTLI_BSWAP32_(value);
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}
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#define BROTLI_BSWAP64_(V) ( \
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(((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \
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(((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \
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(((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \
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(((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU))
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static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
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uint64_t value = BrotliUnalignedRead64(p);
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return BROTLI_BSWAP64_(value);
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}
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static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
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uint64_t value = BROTLI_BSWAP64_(v);
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BrotliUnalignedWrite64(p, value);
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}
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#else /* BROTLI_LITTLE_ENDIAN */
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/* Read / store values byte-wise; hopefully compiler will understand. */
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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(eustas): 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(eustas): 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(18, 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(18, 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_ */
|