shithub: libvpx

ref: e6657f32c56aa3e6e30a05590b4a247efd12aaef
dir: /vpx_dsp/mips/avg_msa.c/

/*
 *  Copyright (c) 2015 The WebM 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 "./vpx_dsp_rtcd.h"
#include "vpx_dsp/mips/macros_msa.h"

uint32_t vpx_avg_8x8_msa(const uint8_t *src, int32_t src_stride) {
  uint32_t sum_out;
  v16u8 src0, src1, src2, src3, src4, src5, src6, src7;
  v8u16 sum0, sum1, sum2, sum3, sum4, sum5, sum6, sum7;
  v4u32 sum = { 0 };

  LD_UB8(src, src_stride, src0, src1, src2, src3, src4, src5, src6, src7);
  HADD_UB4_UH(src0, src1, src2, src3, sum0, sum1, sum2, sum3);
  HADD_UB4_UH(src4, src5, src6, src7, sum4, sum5, sum6, sum7);
  ADD4(sum0, sum1, sum2, sum3, sum4, sum5, sum6, sum7, sum0, sum2, sum4, sum6);
  ADD2(sum0, sum2, sum4, sum6, sum0, sum4);
  sum0 += sum4;

  sum = __msa_hadd_u_w(sum0, sum0);
  sum0 = (v8u16)__msa_pckev_h((v8i16)sum, (v8i16)sum);
  sum = __msa_hadd_u_w(sum0, sum0);
  sum = (v4u32)__msa_srari_w((v4i32)sum, 6);
  sum_out = __msa_copy_u_w((v4i32)sum, 0);

  return sum_out;
}

uint32_t vpx_avg_4x4_msa(const uint8_t *src, int32_t src_stride) {
  uint32_t sum_out;
  uint32_t src0, src1, src2, src3;
  v16u8 vec = { 0 };
  v8u16 sum0;
  v4u32 sum1;
  v2u64 sum2;

  LW4(src, src_stride, src0, src1, src2, src3);
  INSERT_W4_UB(src0, src1, src2, src3, vec);

  sum0 = __msa_hadd_u_h(vec, vec);
  sum1 = __msa_hadd_u_w(sum0, sum0);
  sum0 = (v8u16)__msa_pckev_h((v8i16)sum1, (v8i16)sum1);
  sum1 = __msa_hadd_u_w(sum0, sum0);
  sum2 = __msa_hadd_u_d(sum1, sum1);
  sum1 = (v4u32)__msa_srari_w((v4i32)sum2, 4);
  sum_out = __msa_copy_u_w((v4i32)sum1, 0);

  return sum_out;
}