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 */