vp10/encoder/x86/dct_ssse3.c - aom - Git at Google


            
            /*

            
             *  Copyright (c) 2014 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 <assert.h>

            
            #if defined(_MSC_VER) && _MSC_VER <= 1500

            
            // Need to include math.h before calling tmmintrin.h/intrin.h

            
            // in certain versions of MSVS.

            
            #include <math.h>

            
            #endif

            
            #include <tmmintrin.h>  // SSSE3


            #include "./vp10_rtcd.h"

            
            #include "vpx_dsp/x86/inv_txfm_sse2.h"

            
            #include "vpx_dsp/x86/txfm_common_sse2.h"


            void vp10_fdct8x8_quant_ssse3(const int16_t *input, int stride,

            
                                         int16_t* coeff_ptr, intptr_t n_coeffs,

            
                                         int skip_block, const int16_t* zbin_ptr,

            
                                         const int16_t* round_ptr, const int16_t* quant_ptr,

            
                                         const int16_t* quant_shift_ptr,

            
                                         int16_t* qcoeff_ptr,

            
                                         int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,

            
                                         uint16_t* eob_ptr,

            
                                         const int16_t* scan_ptr,

            
                                         const int16_t* iscan_ptr) {

            
              __m128i zero;

            
              int pass;

            
              // Constants

            
              //    When we use them, in one case, they are all the same. In all others

            
              //    it's a pair of them that we need to repeat four times. This is done

            
              //    by constructing the 32 bit constant corresponding to that pair.

            
              const __m128i k__dual_p16_p16 = dual_set_epi16(23170, 23170);

            
              const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

            
              const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

            
              const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

            
              const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

            
              const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

            
              const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

            
              const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

            
              const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

            
              // Load input

            
              __m128i in0  = _mm_load_si128((const __m128i *)(input + 0 * stride));

            
              __m128i in1  = _mm_load_si128((const __m128i *)(input + 1 * stride));

            
              __m128i in2  = _mm_load_si128((const __m128i *)(input + 2 * stride));

            
              __m128i in3  = _mm_load_si128((const __m128i *)(input + 3 * stride));

            
              __m128i in4  = _mm_load_si128((const __m128i *)(input + 4 * stride));

            
              __m128i in5  = _mm_load_si128((const __m128i *)(input + 5 * stride));

            
              __m128i in6  = _mm_load_si128((const __m128i *)(input + 6 * stride));

            
              __m128i in7  = _mm_load_si128((const __m128i *)(input + 7 * stride));

            
              __m128i *in[8];

            
              int index = 0;


              (void)scan_ptr;

            
              (void)zbin_ptr;

            
              (void)quant_shift_ptr;

            
              (void)coeff_ptr;


              // Pre-condition input (shift by two)

            
              in0 = _mm_slli_epi16(in0, 2);

            
              in1 = _mm_slli_epi16(in1, 2);

            
              in2 = _mm_slli_epi16(in2, 2);

            
              in3 = _mm_slli_epi16(in3, 2);

            
              in4 = _mm_slli_epi16(in4, 2);

            
              in5 = _mm_slli_epi16(in5, 2);

            
              in6 = _mm_slli_epi16(in6, 2);

            
              in7 = _mm_slli_epi16(in7, 2);


              in[0] = &in0;

            
              in[1] = &in1;

            
              in[2] = &in2;

            
              in[3] = &in3;

            
              in[4] = &in4;

            
              in[5] = &in5;

            
              in[6] = &in6;

            
              in[7] = &in7;


              // We do two passes, first the columns, then the rows. The results of the

            
              // first pass are transposed so that the same column code can be reused. The

            
              // results of the second pass are also transposed so that the rows (processed

            
              // as columns) are put back in row positions.

            
              for (pass = 0; pass < 2; pass++) {

            
                // To store results of each pass before the transpose.

            
                __m128i res0, res1, res2, res3, res4, res5, res6, res7;

            
                // Add/subtract

            
                const __m128i q0 = _mm_add_epi16(in0, in7);

            
                const __m128i q1 = _mm_add_epi16(in1, in6);

            
                const __m128i q2 = _mm_add_epi16(in2, in5);

            
                const __m128i q3 = _mm_add_epi16(in3, in4);

            
                const __m128i q4 = _mm_sub_epi16(in3, in4);

            
                const __m128i q5 = _mm_sub_epi16(in2, in5);

            
                const __m128i q6 = _mm_sub_epi16(in1, in6);

            
                const __m128i q7 = _mm_sub_epi16(in0, in7);

            
                // Work on first four results

            
                {

            
                  // Add/subtract

            
                  const __m128i r0 = _mm_add_epi16(q0, q3);

            
                  const __m128i r1 = _mm_add_epi16(q1, q2);

            
                  const __m128i r2 = _mm_sub_epi16(q1, q2);

            
                  const __m128i r3 = _mm_sub_epi16(q0, q3);

            
                  // Interleave to do the multiply by constants which gets us into 32bits

            
                  const __m128i t0 = _mm_unpacklo_epi16(r0, r1);

            
                  const __m128i t1 = _mm_unpackhi_epi16(r0, r1);

            
                  const __m128i t2 = _mm_unpacklo_epi16(r2, r3);

            
                  const __m128i t3 = _mm_unpackhi_epi16(r2, r3);


                  const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);

            
                  const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);

            
                  const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);

            
                  const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);


                  const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);

            
                  const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);

            
                  const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);

            
                  const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);

            
                  // dct_const_round_shift


                  const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

            
                  const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

            
                  const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

            
                  const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);


                  const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

            
                  const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

            
                  const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

            
                  const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);


                  const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

            
                  const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

            
                  const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

            
                  const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);


                  const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

            
                  const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

            
                  const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

            
                  const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

            
                  // Combine


                  res0 = _mm_packs_epi32(w0, w1);

            
                  res4 = _mm_packs_epi32(w2, w3);

            
                  res2 = _mm_packs_epi32(w4, w5);

            
                  res6 = _mm_packs_epi32(w6, w7);

            
                }

            
                // Work on next four results

            
                {

            
                  // Interleave to do the multiply by constants which gets us into 32bits

            
                  const __m128i d0 = _mm_sub_epi16(q6, q5);

            
                  const __m128i d1 = _mm_add_epi16(q6, q5);

            
                  const __m128i r0 = _mm_mulhrs_epi16(d0, k__dual_p16_p16);

            
                  const __m128i r1 = _mm_mulhrs_epi16(d1, k__dual_p16_p16);


                  // Add/subtract

            
                  const __m128i x0 = _mm_add_epi16(q4, r0);

            
                  const __m128i x1 = _mm_sub_epi16(q4, r0);

            
                  const __m128i x2 = _mm_sub_epi16(q7, r1);

            
                  const __m128i x3 = _mm_add_epi16(q7, r1);

            
                  // Interleave to do the multiply by constants which gets us into 32bits

            
                  const __m128i t0 = _mm_unpacklo_epi16(x0, x3);

            
                  const __m128i t1 = _mm_unpackhi_epi16(x0, x3);

            
                  const __m128i t2 = _mm_unpacklo_epi16(x1, x2);

            
                  const __m128i t3 = _mm_unpackhi_epi16(x1, x2);

            
                  const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);

            
                  const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);

            
                  const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);

            
                  const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);

            
                  const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);

            
                  const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);

            
                  const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);

            
                  const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);

            
                  // dct_const_round_shift

            
                  const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

            
                  const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

            
                  const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

            
                  const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

            
                  const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

            
                  const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

            
                  const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

            
                  const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

            
                  const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

            
                  const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

            
                  const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

            
                  const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

            
                  const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

            
                  const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

            
                  const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

            
                  const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

            
                  // Combine

            
                  res1 = _mm_packs_epi32(w0, w1);

            
                  res7 = _mm_packs_epi32(w2, w3);

            
                  res5 = _mm_packs_epi32(w4, w5);

            
                  res3 = _mm_packs_epi32(w6, w7);

            
                }

            
                // Transpose the 8x8.

            
                {

            
                  // 00 01 02 03 04 05 06 07

            
                  // 10 11 12 13 14 15 16 17

            
                  // 20 21 22 23 24 25 26 27

            
                  // 30 31 32 33 34 35 36 37

            
                  // 40 41 42 43 44 45 46 47

            
                  // 50 51 52 53 54 55 56 57

            
                  // 60 61 62 63 64 65 66 67

            
                  // 70 71 72 73 74 75 76 77

            
                  const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);

            
                  const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);

            
                  const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);

            
                  const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);

            
                  const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);

            
                  const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);

            
                  const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);

            
                  const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);

            
                  // 00 10 01 11 02 12 03 13

            
                  // 20 30 21 31 22 32 23 33

            
                  // 04 14 05 15 06 16 07 17

            
                  // 24 34 25 35 26 36 27 37

            
                  // 40 50 41 51 42 52 43 53

            
                  // 60 70 61 71 62 72 63 73

            
                  // 54 54 55 55 56 56 57 57

            
                  // 64 74 65 75 66 76 67 77

            
                  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

            
                  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);

            
                  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

            
                  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);

            
                  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);

            
                  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

            
                  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

            
                  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

            
                  // 00 10 20 30 01 11 21 31

            
                  // 40 50 60 70 41 51 61 71

            
                  // 02 12 22 32 03 13 23 33

            
                  // 42 52 62 72 43 53 63 73

            
                  // 04 14 24 34 05 15 21 36

            
                  // 44 54 64 74 45 55 61 76

            
                  // 06 16 26 36 07 17 27 37

            
                  // 46 56 66 76 47 57 67 77

            
                  in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);

            
                  in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);

            
                  in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);

            
                  in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);

            
                  in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);

            
                  in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);

            
                  in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);

            
                  in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);

            
                  // 00 10 20 30 40 50 60 70

            
                  // 01 11 21 31 41 51 61 71

            
                  // 02 12 22 32 42 52 62 72

            
                  // 03 13 23 33 43 53 63 73

            
                  // 04 14 24 34 44 54 64 74

            
                  // 05 15 25 35 45 55 65 75

            
                  // 06 16 26 36 46 56 66 76

            
                  // 07 17 27 37 47 57 67 77

            
                }

            
              }

            
              // Post-condition output and store it

            
              {

            
                // Post-condition (division by two)

            
                //    division of two 16 bits signed numbers using shifts

            
                //    n / 2 = (n - (n >> 15)) >> 1

            
                const __m128i sign_in0 = _mm_srai_epi16(in0, 15);

            
                const __m128i sign_in1 = _mm_srai_epi16(in1, 15);

            
                const __m128i sign_in2 = _mm_srai_epi16(in2, 15);

            
                const __m128i sign_in3 = _mm_srai_epi16(in3, 15);

            
                const __m128i sign_in4 = _mm_srai_epi16(in4, 15);

            
                const __m128i sign_in5 = _mm_srai_epi16(in5, 15);

            
                const __m128i sign_in6 = _mm_srai_epi16(in6, 15);

            
                const __m128i sign_in7 = _mm_srai_epi16(in7, 15);

            
                in0 = _mm_sub_epi16(in0, sign_in0);

            
                in1 = _mm_sub_epi16(in1, sign_in1);

            
                in2 = _mm_sub_epi16(in2, sign_in2);

            
                in3 = _mm_sub_epi16(in3, sign_in3);

            
                in4 = _mm_sub_epi16(in4, sign_in4);

            
                in5 = _mm_sub_epi16(in5, sign_in5);

            
                in6 = _mm_sub_epi16(in6, sign_in6);

            
                in7 = _mm_sub_epi16(in7, sign_in7);

            
                in0 = _mm_srai_epi16(in0, 1);

            
                in1 = _mm_srai_epi16(in1, 1);

            
                in2 = _mm_srai_epi16(in2, 1);

            
                in3 = _mm_srai_epi16(in3, 1);

            
                in4 = _mm_srai_epi16(in4, 1);

            
                in5 = _mm_srai_epi16(in5, 1);

            
                in6 = _mm_srai_epi16(in6, 1);

            
                in7 = _mm_srai_epi16(in7, 1);

            
              }


              iscan_ptr += n_coeffs;

            
              qcoeff_ptr += n_coeffs;

            
              dqcoeff_ptr += n_coeffs;

            
              n_coeffs = -n_coeffs;

            
              zero = _mm_setzero_si128();


              if (!skip_block) {

            
                __m128i eob;

            
                __m128i round, quant, dequant, thr;

            
                int16_t nzflag;

            
                {

            
                  __m128i coeff0, coeff1;


                  // Setup global values

            
                  {

            
                    round = _mm_load_si128((const __m128i*)round_ptr);

            
                    quant = _mm_load_si128((const __m128i*)quant_ptr);

            
                    dequant = _mm_load_si128((const __m128i*)dequant_ptr);

            
                  }


                  {

            
                    __m128i coeff0_sign, coeff1_sign;

            
                    __m128i qcoeff0, qcoeff1;

            
                    __m128i qtmp0, qtmp1;

            
                    // Do DC and first 15 AC

            
                    coeff0 = *in[0];

            
                    coeff1 = *in[1];


                    // Poor man's sign extract

            
                    coeff0_sign = _mm_srai_epi16(coeff0, 15);

            
                    coeff1_sign = _mm_srai_epi16(coeff1, 15);

            
                    qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

            
                    qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

            
                    qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

            
                    qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);


                    qcoeff0 = _mm_adds_epi16(qcoeff0, round);

            
                    round = _mm_unpackhi_epi64(round, round);

            
                    qcoeff1 = _mm_adds_epi16(qcoeff1, round);

            
                    qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

            
                    quant = _mm_unpackhi_epi64(quant, quant);

            
                    qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);


                    // Reinsert signs

            
                    qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

            
                    qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

            
                    qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

            
                    qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);


                    _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

            
                    _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);


                    coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

            
                    dequant = _mm_unpackhi_epi64(dequant, dequant);

            
                    coeff1 = _mm_mullo_epi16(qcoeff1, dequant);


                    _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

            
                    _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

            
                  }


                  {

            
                    // Scan for eob

            
                    __m128i zero_coeff0, zero_coeff1;

            
                    __m128i nzero_coeff0, nzero_coeff1;

            
                    __m128i iscan0, iscan1;

            
                    __m128i eob1;

            
                    zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

            
                    zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

            
                    nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

            
                    nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

            
                    iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

            
                    iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

            
                    // Add one to convert from indices to counts

            
                    iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

            
                    iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

            
                    eob = _mm_and_si128(iscan0, nzero_coeff0);

            
                    eob1 = _mm_and_si128(iscan1, nzero_coeff1);

            
                    eob = _mm_max_epi16(eob, eob1);

            
                  }

            
                  n_coeffs += 8 * 2;

            
                }


                // AC only loop

            
                index = 2;

            
                thr = _mm_srai_epi16(dequant, 1);

            
                while (n_coeffs < 0) {

            
                  __m128i coeff0, coeff1;

            
                  {

            
                    __m128i coeff0_sign, coeff1_sign;

            
                    __m128i qcoeff0, qcoeff1;

            
                    __m128i qtmp0, qtmp1;


                    assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);

            
                    coeff0 = *in[index];

            
                    coeff1 = *in[index + 1];


                    // Poor man's sign extract

            
                    coeff0_sign = _mm_srai_epi16(coeff0, 15);

            
                    coeff1_sign = _mm_srai_epi16(coeff1, 15);

            
                    qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

            
                    qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

            
                    qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

            
                    qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);


                    nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) |

            
                        _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));


                    if (nzflag) {

            
                      qcoeff0 = _mm_adds_epi16(qcoeff0, round);

            
                      qcoeff1 = _mm_adds_epi16(qcoeff1, round);

            
                      qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

            
                      qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);


                      // Reinsert signs

            
                      qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

            
                      qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

            
                      qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

            
                      qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);


                      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

            
                      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);


                      coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

            
                      coeff1 = _mm_mullo_epi16(qcoeff1, dequant);


                      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

            
                      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

            
                    } else {

            
                      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

            
                      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);


                      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

            
                      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

            
                    }

            
                  }


                  if (nzflag) {

            
                    // Scan for eob

            
                    __m128i zero_coeff0, zero_coeff1;

            
                    __m128i nzero_coeff0, nzero_coeff1;

            
                    __m128i iscan0, iscan1;

            
                    __m128i eob0, eob1;

            
                    zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

            
                    zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

            
                    nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

            
                    nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

            
                    iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

            
                    iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

            
                    // Add one to convert from indices to counts

            
                    iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

            
                    iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

            
                    eob0 = _mm_and_si128(iscan0, nzero_coeff0);

            
                    eob1 = _mm_and_si128(iscan1, nzero_coeff1);

            
                    eob0 = _mm_max_epi16(eob0, eob1);

            
                    eob = _mm_max_epi16(eob, eob0);

            
                  }

            
                  n_coeffs += 8 * 2;

            
                  index += 2;

            
                }


                // Accumulate EOB

            
                {

            
                  __m128i eob_shuffled;

            
                  eob_shuffled = _mm_shuffle_epi32(eob, 0xe);

            
                  eob = _mm_max_epi16(eob, eob_shuffled);

            
                  eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);

            
                  eob = _mm_max_epi16(eob, eob_shuffled);

            
                  eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);

            
                  eob = _mm_max_epi16(eob, eob_shuffled);

            
                  *eob_ptr = _mm_extract_epi16(eob, 1);

            
                }

            
              } else {

            
                do {

            
                  _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

            
                  _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

            
                  _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

            
                  _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

            
                  n_coeffs += 8 * 2;

            
                } while (n_coeffs < 0);

            
                *eob_ptr = 0;

            
              }

            
            }
	/*
	* Copyright (c) 2014 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 <assert.h>
	#if defined(_MSC_VER) && _MSC_VER <= 1500
	// Need to include math.h before calling tmmintrin.h/intrin.h
	// in certain versions of MSVS.
	#include <math.h>
	#endif
	#include <tmmintrin.h> // SSSE3

	#include "./vp10_rtcd.h"
	#include "vpx_dsp/x86/inv_txfm_sse2.h"
	#include "vpx_dsp/x86/txfm_common_sse2.h"

	void vp10_fdct8x8_quant_ssse3(const int16_t *input, int stride,
	int16_t* coeff_ptr, intptr_t n_coeffs,
	int skip_block, const int16_t* zbin_ptr,
	const int16_t* round_ptr, const int16_t* quant_ptr,
	const int16_t* quant_shift_ptr,
	int16_t* qcoeff_ptr,
	int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,
	uint16_t* eob_ptr,
	const int16_t* scan_ptr,
	const int16_t* iscan_ptr) {
	__m128i zero;
	int pass;
	// Constants
	// When we use them, in one case, they are all the same. In all others
	// it's a pair of them that we need to repeat four times. This is done
	// by constructing the 32 bit constant corresponding to that pair.
	const __m128i k__dual_p16_p16 = dual_set_epi16(23170, 23170);
	const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
	const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
	const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
	const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
	const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
	const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
	const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
	const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
	const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
	// Load input
	__m128i in0 = _mm_load_si128((const __m128i )(input + 0 stride));
	__m128i in1 = _mm_load_si128((const __m128i )(input + 1 stride));
	__m128i in2 = _mm_load_si128((const __m128i )(input + 2 stride));
	__m128i in3 = _mm_load_si128((const __m128i )(input + 3 stride));
	__m128i in4 = _mm_load_si128((const __m128i )(input + 4 stride));
	__m128i in5 = _mm_load_si128((const __m128i )(input + 5 stride));
	__m128i in6 = _mm_load_si128((const __m128i )(input + 6 stride));
	__m128i in7 = _mm_load_si128((const __m128i )(input + 7 stride));
	__m128i *in[8];
	int index = 0;

	(void)scan_ptr;
	(void)zbin_ptr;
	(void)quant_shift_ptr;
	(void)coeff_ptr;

	// Pre-condition input (shift by two)
	in0 = _mm_slli_epi16(in0, 2);
	in1 = _mm_slli_epi16(in1, 2);
	in2 = _mm_slli_epi16(in2, 2);
	in3 = _mm_slli_epi16(in3, 2);
	in4 = _mm_slli_epi16(in4, 2);
	in5 = _mm_slli_epi16(in5, 2);
	in6 = _mm_slli_epi16(in6, 2);
	in7 = _mm_slli_epi16(in7, 2);

	in[0] = &in0;
	in[1] = &in1;
	in[2] = &in2;
	in[3] = &in3;
	in[4] = &in4;
	in[5] = &in5;
	in[6] = &in6;
	in[7] = &in7;

	// We do two passes, first the columns, then the rows. The results of the
	// first pass are transposed so that the same column code can be reused. The
	// results of the second pass are also transposed so that the rows (processed
	// as columns) are put back in row positions.
	for (pass = 0; pass < 2; pass++) {
	// To store results of each pass before the transpose.
	__m128i res0, res1, res2, res3, res4, res5, res6, res7;
	// Add/subtract
	const __m128i q0 = _mm_add_epi16(in0, in7);
	const __m128i q1 = _mm_add_epi16(in1, in6);
	const __m128i q2 = _mm_add_epi16(in2, in5);
	const __m128i q3 = _mm_add_epi16(in3, in4);
	const __m128i q4 = _mm_sub_epi16(in3, in4);
	const __m128i q5 = _mm_sub_epi16(in2, in5);
	const __m128i q6 = _mm_sub_epi16(in1, in6);
	const __m128i q7 = _mm_sub_epi16(in0, in7);
	// Work on first four results
	{
	// Add/subtract
	const __m128i r0 = _mm_add_epi16(q0, q3);
	const __m128i r1 = _mm_add_epi16(q1, q2);
	const __m128i r2 = _mm_sub_epi16(q1, q2);
	const __m128i r3 = _mm_sub_epi16(q0, q3);
	// Interleave to do the multiply by constants which gets us into 32bits
	const __m128i t0 = _mm_unpacklo_epi16(r0, r1);
	const __m128i t1 = _mm_unpackhi_epi16(r0, r1);
	const __m128i t2 = _mm_unpacklo_epi16(r2, r3);
	const __m128i t3 = _mm_unpackhi_epi16(r2, r3);

	const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
	const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);
	const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);
	const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);

	const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);
	const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);
	const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);
	const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);
	// dct_const_round_shift

	const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
	const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
	const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
	const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

	const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
	const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
	const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
	const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

	const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
	const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
	const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
	const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

	const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
	const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
	const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
	const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
	// Combine

	res0 = _mm_packs_epi32(w0, w1);
	res4 = _mm_packs_epi32(w2, w3);
	res2 = _mm_packs_epi32(w4, w5);
	res6 = _mm_packs_epi32(w6, w7);
	}
	// Work on next four results
	{
	// Interleave to do the multiply by constants which gets us into 32bits
	const __m128i d0 = _mm_sub_epi16(q6, q5);
	const __m128i d1 = _mm_add_epi16(q6, q5);
	const __m128i r0 = _mm_mulhrs_epi16(d0, k__dual_p16_p16);
	const __m128i r1 = _mm_mulhrs_epi16(d1, k__dual_p16_p16);

	// Add/subtract
	const __m128i x0 = _mm_add_epi16(q4, r0);
	const __m128i x1 = _mm_sub_epi16(q4, r0);
	const __m128i x2 = _mm_sub_epi16(q7, r1);
	const __m128i x3 = _mm_add_epi16(q7, r1);
	// Interleave to do the multiply by constants which gets us into 32bits
	const __m128i t0 = _mm_unpacklo_epi16(x0, x3);
	const __m128i t1 = _mm_unpackhi_epi16(x0, x3);
	const __m128i t2 = _mm_unpacklo_epi16(x1, x2);
	const __m128i t3 = _mm_unpackhi_epi16(x1, x2);
	const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);
	const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);
	const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);
	const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);
	const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);
	const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);
	const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);
	const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);
	// dct_const_round_shift
	const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
	const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
	const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
	const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
	const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
	const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
	const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
	const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
	const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
	const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
	const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
	const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
	const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
	const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
	const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
	const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
	// Combine
	res1 = _mm_packs_epi32(w0, w1);
	res7 = _mm_packs_epi32(w2, w3);
	res5 = _mm_packs_epi32(w4, w5);
	res3 = _mm_packs_epi32(w6, w7);
	}
	// Transpose the 8x8.
	{
	// 00 01 02 03 04 05 06 07
	// 10 11 12 13 14 15 16 17
	// 20 21 22 23 24 25 26 27
	// 30 31 32 33 34 35 36 37
	// 40 41 42 43 44 45 46 47
	// 50 51 52 53 54 55 56 57
	// 60 61 62 63 64 65 66 67
	// 70 71 72 73 74 75 76 77
	const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);
	const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);
	const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);
	const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);
	const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);
	const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);
	const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);
	const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);
	// 00 10 01 11 02 12 03 13
	// 20 30 21 31 22 32 23 33
	// 04 14 05 15 06 16 07 17
	// 24 34 25 35 26 36 27 37
	// 40 50 41 51 42 52 43 53
	// 60 70 61 71 62 72 63 73
	// 54 54 55 55 56 56 57 57
	// 64 74 65 75 66 76 67 77
	const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
	const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);
	const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
	const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
	const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
	const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
	const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
	const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
	// 00 10 20 30 01 11 21 31
	// 40 50 60 70 41 51 61 71
	// 02 12 22 32 03 13 23 33
	// 42 52 62 72 43 53 63 73
	// 04 14 24 34 05 15 21 36
	// 44 54 64 74 45 55 61 76
	// 06 16 26 36 07 17 27 37
	// 46 56 66 76 47 57 67 77
	in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);
	in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);
	in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);
	in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);
	in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);
	in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);
	in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);
	in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);
	// 00 10 20 30 40 50 60 70
	// 01 11 21 31 41 51 61 71
	// 02 12 22 32 42 52 62 72
	// 03 13 23 33 43 53 63 73
	// 04 14 24 34 44 54 64 74
	// 05 15 25 35 45 55 65 75
	// 06 16 26 36 46 56 66 76
	// 07 17 27 37 47 57 67 77
	}
	}
	// Post-condition output and store it
	{
	// Post-condition (division by two)
	// division of two 16 bits signed numbers using shifts
	// n / 2 = (n - (n >> 15)) >> 1
	const __m128i sign_in0 = _mm_srai_epi16(in0, 15);
	const __m128i sign_in1 = _mm_srai_epi16(in1, 15);
	const __m128i sign_in2 = _mm_srai_epi16(in2, 15);
	const __m128i sign_in3 = _mm_srai_epi16(in3, 15);
	const __m128i sign_in4 = _mm_srai_epi16(in4, 15);
	const __m128i sign_in5 = _mm_srai_epi16(in5, 15);
	const __m128i sign_in6 = _mm_srai_epi16(in6, 15);
	const __m128i sign_in7 = _mm_srai_epi16(in7, 15);
	in0 = _mm_sub_epi16(in0, sign_in0);
	in1 = _mm_sub_epi16(in1, sign_in1);
	in2 = _mm_sub_epi16(in2, sign_in2);
	in3 = _mm_sub_epi16(in3, sign_in3);
	in4 = _mm_sub_epi16(in4, sign_in4);
	in5 = _mm_sub_epi16(in5, sign_in5);
	in6 = _mm_sub_epi16(in6, sign_in6);
	in7 = _mm_sub_epi16(in7, sign_in7);
	in0 = _mm_srai_epi16(in0, 1);
	in1 = _mm_srai_epi16(in1, 1);
	in2 = _mm_srai_epi16(in2, 1);
	in3 = _mm_srai_epi16(in3, 1);
	in4 = _mm_srai_epi16(in4, 1);
	in5 = _mm_srai_epi16(in5, 1);
	in6 = _mm_srai_epi16(in6, 1);
	in7 = _mm_srai_epi16(in7, 1);
	}

	iscan_ptr += n_coeffs;
	qcoeff_ptr += n_coeffs;
	dqcoeff_ptr += n_coeffs;
	n_coeffs = -n_coeffs;
	zero = _mm_setzero_si128();

	if (!skip_block) {
	__m128i eob;
	__m128i round, quant, dequant, thr;
	int16_t nzflag;
	{
	__m128i coeff0, coeff1;

	// Setup global values
	{
	round = _mm_load_si128((const __m128i*)round_ptr);
	quant = _mm_load_si128((const __m128i*)quant_ptr);
	dequant = _mm_load_si128((const __m128i*)dequant_ptr);
	}

	{
	__m128i coeff0_sign, coeff1_sign;
	__m128i qcoeff0, qcoeff1;
	__m128i qtmp0, qtmp1;
	// Do DC and first 15 AC
	coeff0 = *in[0];
	coeff1 = *in[1];

	// Poor man's sign extract
	coeff0_sign = _mm_srai_epi16(coeff0, 15);
	coeff1_sign = _mm_srai_epi16(coeff1, 15);
	qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);
	qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);
	qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
	qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

	qcoeff0 = _mm_adds_epi16(qcoeff0, round);
	round = _mm_unpackhi_epi64(round, round);
	qcoeff1 = _mm_adds_epi16(qcoeff1, round);
	qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
	quant = _mm_unpackhi_epi64(quant, quant);
	qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

	// Reinsert signs
	qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
	qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
	qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
	qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

	coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
	dequant = _mm_unpackhi_epi64(dequant, dequant);
	coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
	}

	{
	// Scan for eob
	__m128i zero_coeff0, zero_coeff1;
	__m128i nzero_coeff0, nzero_coeff1;
	__m128i iscan0, iscan1;
	__m128i eob1;
	zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);
	zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);
	nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);
	nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);
	iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));
	iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);
	// Add one to convert from indices to counts
	iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);
	iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);
	eob = _mm_and_si128(iscan0, nzero_coeff0);
	eob1 = _mm_and_si128(iscan1, nzero_coeff1);
	eob = _mm_max_epi16(eob, eob1);
	}
	n_coeffs += 8 * 2;
	}

	// AC only loop
	index = 2;
	thr = _mm_srai_epi16(dequant, 1);
	while (n_coeffs < 0) {
	__m128i coeff0, coeff1;
	{
	__m128i coeff0_sign, coeff1_sign;
	__m128i qcoeff0, qcoeff1;
	__m128i qtmp0, qtmp1;

	assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);
	coeff0 = *in[index];
	coeff1 = *in[index + 1];

	// Poor man's sign extract
	coeff0_sign = _mm_srai_epi16(coeff0, 15);
	coeff1_sign = _mm_srai_epi16(coeff1, 15);
	qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);
	qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);
	qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
	qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

	nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) \|
	_mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));

	if (nzflag) {
	qcoeff0 = _mm_adds_epi16(qcoeff0, round);
	qcoeff1 = _mm_adds_epi16(qcoeff1, round);
	qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
	qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

	// Reinsert signs
	qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
	qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
	qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
	qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

	coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
	coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
	} else {
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);
	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);
	}
	}

	if (nzflag) {
	// Scan for eob
	__m128i zero_coeff0, zero_coeff1;
	__m128i nzero_coeff0, nzero_coeff1;
	__m128i iscan0, iscan1;
	__m128i eob0, eob1;
	zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);
	zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);
	nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);
	nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);
	iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));
	iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);
	// Add one to convert from indices to counts
	iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);
	iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);
	eob0 = _mm_and_si128(iscan0, nzero_coeff0);
	eob1 = _mm_and_si128(iscan1, nzero_coeff1);
	eob0 = _mm_max_epi16(eob0, eob1);
	eob = _mm_max_epi16(eob, eob0);
	}
	n_coeffs += 8 * 2;
	index += 2;
	}

	// Accumulate EOB
	{
	__m128i eob_shuffled;
	eob_shuffled = _mm_shuffle_epi32(eob, 0xe);
	eob = _mm_max_epi16(eob, eob_shuffled);
	eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);
	eob = _mm_max_epi16(eob, eob_shuffled);
	eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);
	eob = _mm_max_epi16(eob, eob_shuffled);
	*eob_ptr = _mm_extract_epi16(eob, 1);
	}
	} else {
	do {
	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);
	_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);
	_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);
	n_coeffs += 8 * 2;
	} while (n_coeffs < 0);
	*eob_ptr = 0;
	}
	}