/* * 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> #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)#else /* !_MSC_VER */#define NOINLINE __attribute__((noinline))#endif /* !_MSC_VER */ #ifdef __clang__#define NO_SANITIZE(x) __attribute__((no_sanitize(x)))#else#define NO_SANITIZE(x)#endif #if defined(NDEBUG) && (defined(__GNUC__) || defined(__clang__))#define assert(x) do { if (!(x)) __builtin_unreachable(); } while (0)#elif defined(NDEBUG) && defined(_MSC_VER)#define assert __assume#else#include <assert.h>#endif #if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__)#    define dav1d_uninit(x) x=x#else#    define dav1d_uninit(x) x#endif  #ifdef _MSC_VER #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 _WIN64static 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 __has_feature#define __has_feature(x) 0#endif #endif /* DAV1D_COMMON_ATTRIBUTES_H */