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Diffstat (limited to 'third_party/dav1d/include/common/attributes.h')
| -rw-r--r-- | third_party/dav1d/include/common/attributes.h | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/third_party/dav1d/include/common/attributes.h b/third_party/dav1d/include/common/attributes.h new file mode 100644 index 0000000000..2af42ef78b --- /dev/null +++ b/third_party/dav1d/include/common/attributes.h @@ -0,0 +1,199 @@ +/* + * Copyright © 2018, VideoLAN and dav1d authors + * Copyright © 2018, Two Orioles, LLC + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef DAV1D_COMMON_ATTRIBUTES_H +#define DAV1D_COMMON_ATTRIBUTES_H + +#include "config.h" + +#include <stddef.h> +#include <assert.h> + +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifndef __has_feature +#define __has_feature(x) 0 +#endif + +#ifdef __GNUC__ +#define ATTR_ALIAS __attribute__((may_alias)) +#define ATTR_FORMAT_PRINTF(fmt, attr) __attribute__((__format__(__printf__, fmt, attr))) +#define COLD __attribute__((cold)) +#else +#define ATTR_ALIAS +#define ATTR_FORMAT_PRINTF(fmt, attr) +#define COLD +#endif + +#if ARCH_X86_64 +/* x86-64 needs 32- and 64-byte alignment for AVX2 and AVX-512. */ +#define ALIGN_64_VAL 64 +#define ALIGN_32_VAL 32 +#define ALIGN_16_VAL 16 +#elif ARCH_X86_32 || ARCH_ARM || ARCH_AARCH64 || ARCH_PPC64LE +/* ARM doesn't benefit from anything more than 16-byte alignment. */ +#define ALIGN_64_VAL 16 +#define ALIGN_32_VAL 16 +#define ALIGN_16_VAL 16 +#else +/* No need for extra alignment on platforms without assembly. */ +#define ALIGN_64_VAL 8 +#define ALIGN_32_VAL 8 +#define ALIGN_16_VAL 8 +#endif + +/* + * API for variables, struct members (ALIGN()) like: + * uint8_t var[1][2][3][4] + * becomes: + * ALIGN(uint8_t var[1][2][3][4], alignment). + */ +#ifdef _MSC_VER +#define ALIGN(ll, a) \ + __declspec(align(a)) ll +#else +#define ALIGN(line, align) \ + line __attribute__((aligned(align))) +#endif + +/* + * API for stack alignment (ALIGN_STK_$align()) of variables like: + * uint8_t var[1][2][3][4] + * becomes: + * ALIGN_STK_$align(uint8_t, var, 1, [2][3][4]) + */ +#define ALIGN_STK_64(type, var, sz1d, sznd) \ + ALIGN(type var[sz1d]sznd, ALIGN_64_VAL) +#define ALIGN_STK_32(type, var, sz1d, sznd) \ + ALIGN(type var[sz1d]sznd, ALIGN_32_VAL) +#define ALIGN_STK_16(type, var, sz1d, sznd) \ + ALIGN(type var[sz1d]sznd, ALIGN_16_VAL) + +/* + * Forbid inlining of a function: + * static NOINLINE void func() {} + */ +#ifdef _MSC_VER +#define NOINLINE __declspec(noinline) +#elif __has_attribute(noclone) +#define NOINLINE __attribute__((noinline, noclone)) +#else +#define NOINLINE __attribute__((noinline)) +#endif + +#ifdef _MSC_VER +#define ALWAYS_INLINE __forceinline +#else +#define ALWAYS_INLINE __attribute__((always_inline)) inline +#endif + +#if (defined(__ELF__) || defined(__MACH__) || (defined(_WIN32) && defined(__clang__))) && __has_attribute(visibility) +#define EXTERN extern __attribute__((visibility("hidden"))) +#else +#define EXTERN extern +#endif + +#ifdef __clang__ +#define NO_SANITIZE(x) __attribute__((no_sanitize(x))) +#else +#define NO_SANITIZE(x) +#endif + +#if defined(NDEBUG) && (defined(__GNUC__) || defined(__clang__)) +#undef assert +#define assert(x) do { if (!(x)) __builtin_unreachable(); } while (0) +#elif defined(NDEBUG) && defined(_MSC_VER) +#undef assert +#define assert __assume +#endif + +#if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__) +# define dav1d_uninit(x) x=x +#else +# define dav1d_uninit(x) x +#endif + +#if defined(_MSC_VER) && !defined(__clang__) +#include <intrin.h> + +static inline int ctz(const unsigned int mask) { + unsigned long idx; + _BitScanForward(&idx, mask); + return idx; +} + +static inline int clz(const unsigned int mask) { + unsigned long leading_zero = 0; + _BitScanReverse(&leading_zero, mask); + return (31 - leading_zero); +} + +#ifdef _WIN64 +static inline int clzll(const unsigned long long mask) { + unsigned long leading_zero = 0; + _BitScanReverse64(&leading_zero, mask); + return (63 - leading_zero); +} +#else /* _WIN64 */ +static inline int clzll(const unsigned long long mask) { + if (mask >> 32) + return clz((unsigned)(mask >> 32)); + else + return clz((unsigned)mask) + 32; +} +#endif /* _WIN64 */ +#else /* !_MSC_VER */ +static inline int ctz(const unsigned int mask) { + return __builtin_ctz(mask); +} + +static inline int clz(const unsigned int mask) { + return __builtin_clz(mask); +} + +static inline int clzll(const unsigned long long mask) { + return __builtin_clzll(mask); +} +#endif /* !_MSC_VER */ + +#ifndef static_assert +#define CHECK_OFFSET(type, field, name) \ + struct check_##type##_##field { int x[(name == offsetof(type, field)) ? 1 : -1]; } +#else +#define CHECK_OFFSET(type, field, name) \ + static_assert(name == offsetof(type, field), #field) +#endif + +#ifdef _MSC_VER +#define PACKED(...) __pragma(pack(push, 1)) __VA_ARGS__ __pragma(pack(pop)) +#else +#define PACKED(...) __VA_ARGS__ __attribute__((__packed__)) +#endif + +#endif /* DAV1D_COMMON_ATTRIBUTES_H */ |