• Frank Barchard's avatar
    xmmword cast for clang · cda9d38a
    Frank Barchard authored
    clangcl use compare_win for 32 bit, allowing fallback and enabling avx2 code for clang.
    move defines/protos to compare_row.h
    fix issue with odd width ARGBCopyAlpha functions by copying destination to temp buffer, then doing alpha copy, then copy back to destination.
    
    R=harryjin@google.com
    TBR=harryjin@google.com
    BUG=libyuv:484
    
    Review URL: https://webrtc-codereview.appspot.com/59379004.
    cda9d38a
compare_neon64.cc 2.04 KB
/*
 *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE 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.
 */

#include "libyuv/basic_types.h"

#include "libyuv/compare_row.h"
#include "libyuv/row.h"

#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif

#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)

uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) {
  volatile uint32 sse;
  asm volatile (
    "eor        v16.16b, v16.16b, v16.16b      \n"
    "eor        v18.16b, v18.16b, v18.16b      \n"
    "eor        v17.16b, v17.16b, v17.16b      \n"
    "eor        v19.16b, v19.16b, v19.16b      \n"

  "1:                                          \n"
    MEMACCESS(0)
    "ld1        {v0.16b}, [%0], #16            \n"
    MEMACCESS(1)
    "ld1        {v1.16b}, [%1], #16            \n"
    "subs       %w2, %w2, #16                  \n"
    "usubl      v2.8h, v0.8b, v1.8b            \n"
    "usubl2     v3.8h, v0.16b, v1.16b          \n"
    "smlal      v16.4s, v2.4h, v2.4h           \n"
    "smlal      v17.4s, v3.4h, v3.4h           \n"
    "smlal2     v18.4s, v2.8h, v2.8h           \n"
    "smlal2     v19.4s, v3.8h, v3.8h           \n"
    "b.gt       1b                             \n"

    "add        v16.4s, v16.4s, v17.4s         \n"
    "add        v18.4s, v18.4s, v19.4s         \n"
    "add        v19.4s, v16.4s, v18.4s         \n"
    "addv       s0, v19.4s                     \n"
    "fmov       %w3, s0                        \n"
    : "+r"(src_a),
      "+r"(src_b),
      "+r"(count),
      "=r"(sse)
    :
    : "cc", "v0", "v1", "v2", "v3", "v16", "v17", "v18", "v19");
  return sse;
}

#endif  // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)

#ifdef __cplusplus
}  // extern "C"
}  // namespace libyuv
#endif