// Copyright 2022 Google Inc. All Rights Reserved.

//

// Use of this source code is governed by a BSD-style license

// that can be found in the COPYING file in the root of the source

// tree. An additional intellectual property rights grant can be found

// in the file PATENTS. All contributing project authors may

// be found in the AUTHORS file in the root of the source tree.

// -----------------------------------------------------------------------------

//

//   CPU detection functions and macros.

//

// Author: Skal (pascal.massimino@gmail.com)

#ifndef WEBP_DSP_CPU_H_

#define WEBP_DSP_CPU_H_

#include <stddef.h>

#ifdef HAVE_CONFIG_H

#include "src/webp/config.h"

#endif

#include "src/webp/types.h"

#if defined(__GNUC__)

#define LOCAL_GCC_VERSION ((__GNUC__ << 8) | __GNUC_MINOR__)

#define LOCAL_GCC_PREREQ(maj, min) (LOCAL_GCC_VERSION >= (((maj) << 8) | (min)))

#else

#define LOCAL_GCC_VERSION 0

#define LOCAL_GCC_PREREQ(maj, min) 0

#endif

#if defined(__clang__)

#define LOCAL_CLANG_VERSION ((__clang_major__ << 8) | __clang_minor__)

#define LOCAL_CLANG_PREREQ(maj, min) \

  (LOCAL_CLANG_VERSION >= (((maj) << 8) | (min)))

#else

#define LOCAL_CLANG_VERSION 0

#define LOCAL_CLANG_PREREQ(maj, min) 0

#endif

#ifndef __has_builtin

#define __has_builtin(x) 0

#endif

//------------------------------------------------------------------------------

// x86 defines.

#if !defined(HAVE_CONFIG_H)

#if defined(_MSC_VER) && _MSC_VER > 1310 && \

    (defined(_M_X64) || defined(_M_IX86))

#define WEBP_MSC_SSE2  // Visual C++ SSE2 targets

#endif

#if defined(_MSC_VER) && _MSC_VER >= 1500 && \

    (defined(_M_X64) || defined(_M_IX86))

#define WEBP_MSC_SSE41  // Visual C++ SSE4.1 targets

#endif

#endif

// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp

// files without intrinsics, allowing the corresponding Init() to be called.

// Files containing intrinsics will need to be built targeting the instruction

// set so should succeed on one of the earlier tests.

#if (defined(__SSE2__) || defined(WEBP_MSC_SSE2)) && \

    (!defined(HAVE_CONFIG_H) || defined(WEBP_HAVE_SSE2))

#define WEBP_USE_SSE2

#endif

#if defined(WEBP_USE_SSE2) && !defined(WEBP_HAVE_SSE2)

#define WEBP_HAVE_SSE2

#endif

#if (defined(__SSE4_1__) || defined(WEBP_MSC_SSE41)) && \

    (!defined(HAVE_CONFIG_H) || defined(WEBP_HAVE_SSE41))

#define WEBP_USE_SSE41

#endif

#if defined(WEBP_USE_SSE41) && !defined(WEBP_HAVE_SSE41)

#define WEBP_HAVE_SSE41

#endif

#undef WEBP_MSC_SSE41

#undef WEBP_MSC_SSE2

//------------------------------------------------------------------------------

// Arm defines.

// The intrinsics currently cause compiler errors with arm-nacl-gcc and the

// inline assembly would need to be modified for use with Native Client.

#if ((defined(__ARM_NEON__) || defined(__aarch64__)) &&       \

     (!defined(HAVE_CONFIG_H) || defined(WEBP_HAVE_NEON))) && \

    !defined(__native_client__)

#define WEBP_USE_NEON

#endif

#if !defined(WEBP_USE_NEON) && defined(__ANDROID__) && \

    defined(__ARM_ARCH_7A__) && defined(HAVE_CPU_FEATURES_H)

#define WEBP_ANDROID_NEON  // Android targets that may have NEON

#define WEBP_USE_NEON

#endif

// Note: ARM64 is supported in Visual Studio 2017, but requires the direct

// inclusion of arm64_neon.h; Visual Studio 2019 includes this file in

// arm_neon.h. Compile errors were seen with Visual Studio 2019 16.4 with

// vtbl4_u8(); a fix was made in 16.6.

#if defined(_MSC_VER) && \

    ((_MSC_VER >= 1700 && defined(_M_ARM)) || \

     (_MSC_VER >= 1926 && (defined(_M_ARM64) || defined(_M_ARM64EC))))

#define WEBP_USE_NEON

#define WEBP_USE_INTRINSICS

#endif

#if defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)

#define WEBP_AARCH64 1

#else

#define WEBP_AARCH64 0

#endif

#if defined(WEBP_USE_NEON) && !defined(WEBP_HAVE_NEON)

#define WEBP_HAVE_NEON

#endif

//------------------------------------------------------------------------------

// MIPS defines.

#if defined(__mips__) && !defined(__mips64) && defined(__mips_isa_rev) && \

    (__mips_isa_rev >= 1) && (__mips_isa_rev < 6)

#define WEBP_USE_MIPS32

#if (__mips_isa_rev >= 2)

#define WEBP_USE_MIPS32_R2

#if defined(__mips_dspr2) || (defined(__mips_dsp_rev) && __mips_dsp_rev >= 2)

#define WEBP_USE_MIPS_DSP_R2

#endif

#endif

#endif

#if defined(__mips_msa) && defined(__mips_isa_rev) && (__mips_isa_rev >= 5)

#define WEBP_USE_MSA

#endif

//------------------------------------------------------------------------------

#ifndef WEBP_DSP_OMIT_C_CODE

#define WEBP_DSP_OMIT_C_CODE 1

#endif

#if defined(WEBP_USE_NEON) && WEBP_DSP_OMIT_C_CODE

#define WEBP_NEON_OMIT_C_CODE 1

#else

#define WEBP_NEON_OMIT_C_CODE 0

#endif

#if !(LOCAL_CLANG_PREREQ(3, 8) || LOCAL_GCC_PREREQ(4, 8) || WEBP_AARCH64)

#define WEBP_NEON_WORK_AROUND_GCC 1

#else

#define WEBP_NEON_WORK_AROUND_GCC 0

#endif

//------------------------------------------------------------------------------

// This macro prevents thread_sanitizer from reporting known concurrent writes.

#define WEBP_TSAN_IGNORE_FUNCTION

#if defined(__has_feature)

#if __has_feature(thread_sanitizer)

#undef WEBP_TSAN_IGNORE_FUNCTION

#define WEBP_TSAN_IGNORE_FUNCTION __attribute__((no_sanitize_thread))

#endif

#endif

#if defined(__has_feature)

#if __has_feature(memory_sanitizer)

#define WEBP_MSAN

#endif

#endif

#if defined(WEBP_USE_THREAD) && !defined(_WIN32)

#include <pthread.h>  // NOLINT

#define WEBP_DSP_INIT(func)                                         \

  do {                                                              \

    static volatile VP8CPUInfo func##_last_cpuinfo_used =           \

        (VP8CPUInfo)&func##_last_cpuinfo_used;                      \

    static pthread_mutex_t func##_lock = PTHREAD_MUTEX_INITIALIZER; \

    if (pthread_mutex_lock(&func##_lock)) break;                    \

    if (func##_last_cpuinfo_used != VP8GetCPUInfo) func();          \

    func##_last_cpuinfo_used = VP8GetCPUInfo;                       \

    (void)pthread_mutex_unlock(&func##_lock);                       \

  } while (0)

#else  // !(defined(WEBP_USE_THREAD) && !defined(_WIN32))

#define WEBP_DSP_INIT(func)                               \

  do {                                                    \

    static volatile VP8CPUInfo func##_last_cpuinfo_used = \

        (VP8CPUInfo)&func##_last_cpuinfo_used;            \

    if (func##_last_cpuinfo_used == VP8GetCPUInfo) break; \

    func();                                               \

    func##_last_cpuinfo_used = VP8GetCPUInfo;             \

  } while (0)

#endif  // defined(WEBP_USE_THREAD) && !defined(_WIN32)

// Defines an Init + helper function that control multiple initialization of

// function pointers / tables.

/* Usage:

   WEBP_DSP_INIT_FUNC(InitFunc) {

     ...function body

   }

*/

#define WEBP_DSP_INIT_FUNC(name)                                            \

  static WEBP_TSAN_IGNORE_FUNCTION void name##_body(void);                  \

  WEBP_TSAN_IGNORE_FUNCTION void name(void) { WEBP_DSP_INIT(name##_body); } \

Unexecuted instantiation: vp8_dec.c:InitGetCoeffs

Unexecuted instantiation: WebPInitAlphaProcessing

Unexecuted instantiation: VP8EncDspCostInit

Unexecuted instantiation: VP8DspInit

Unexecuted instantiation: VP8EncDspInit

Unexecuted instantiation: VP8FiltersInit

Unexecuted instantiation: VP8LDspInit

Unexecuted instantiation: WebPRescalerDspInit

Unexecuted instantiation: WebPInitYUV444Converters

Unexecuted instantiation: WebPInitUpsamplers

Unexecuted instantiation: WebPInitSamplers

Unexecuted instantiation: WebPInitConvertARGBToYUV

Unexecuted instantiation: picture_csp_enc.c:InitGammaTables

Unexecuted instantiation: VP8LEncDspInit

Unexecuted instantiation: VP8SSIMDspInit

  static WEBP_TSAN_IGNORE_FUNCTION void name##_body(void)

#define WEBP_UBSAN_IGNORE_UNDEF

#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW

#if defined(__clang__) && defined(__has_attribute)

#if __has_attribute(no_sanitize)

// This macro prevents the undefined behavior sanitizer from reporting

// failures. This is only meant to silence unaligned loads on platforms that

// are known to support them.

#undef WEBP_UBSAN_IGNORE_UNDEF

#define WEBP_UBSAN_IGNORE_UNDEF __attribute__((no_sanitize("undefined")))

// This macro prevents the undefined behavior sanitizer from reporting

// failures related to unsigned integer overflows. This is only meant to

// silence cases where this well defined behavior is expected.

#undef WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW

#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW \

  __attribute__((no_sanitize("unsigned-integer-overflow")))

#endif

#endif

// If 'ptr' is NULL, returns NULL. Otherwise returns 'ptr + off'.

// Prevents undefined behavior sanitizer nullptr-with-nonzero-offset warning.

#if !defined(WEBP_OFFSET_PTR)

#define WEBP_OFFSET_PTR(ptr, off) (((ptr) == NULL) ? NULL : ((ptr) + (off)))

#endif

// Regularize the definition of WEBP_SWAP_16BIT_CSP (backward compatibility)

#if !defined(WEBP_SWAP_16BIT_CSP)

#define WEBP_SWAP_16BIT_CSP 0

#endif

// some endian fix (e.g.: mips-gcc doesn't define __BIG_ENDIAN__)

#if !defined(WORDS_BIGENDIAN) &&                   \

    (defined(__BIG_ENDIAN__) || defined(_M_PPC) || \

     (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)))

#define WORDS_BIGENDIAN

#endif

typedef enum {

  kSSE2,

  kSSE3,

  kSlowSSSE3,  // special feature for slow SSSE3 architectures

  kSSE4_1,

  kAVX,

  kAVX2,

  kNEON,

  kMIPS32,

  kMIPSdspR2,

  kMSA

} CPUFeature;

// returns true if the CPU supports the feature.

typedef int (*VP8CPUInfo)(CPUFeature feature);

#endif  // WEBP_DSP_CPU_H_