vp9/encoder/x86/vp9_dct_sse2.c - aom - Git at Google


            
            /*

            
             *  Copyright (c) 2012 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>

            
            #include <emmintrin.h>  // SSE2


            #include "./vp9_rtcd.h"

            
            #include "./vpx_dsp_rtcd.h"

            
            #include "vpx_dsp/txfm_common.h"

            
            #include "vpx_dsp/x86/fwd_txfm_sse2.h"

            
            #include "vpx_dsp/x86/txfm_common_sse2.h"

            
            #include "vpx_ports/mem.h"


            static INLINE void load_buffer_4x4(const int16_t *input, __m128i *in,

            
                                               int stride) {

            
              const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);

            
              const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);

            
              __m128i mask;


              in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));

            
              in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));

            
              in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));

            
              in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));


              in[0] = _mm_slli_epi16(in[0], 4);

            
              in[1] = _mm_slli_epi16(in[1], 4);

            
              in[2] = _mm_slli_epi16(in[2], 4);

            
              in[3] = _mm_slli_epi16(in[3], 4);


              mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);

            
              in[0] = _mm_add_epi16(in[0], mask);

            
              in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);

            
            }


            static INLINE void write_buffer_4x4(tran_low_t *output, __m128i *res) {

            
              const __m128i kOne = _mm_set1_epi16(1);

            
              __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);

            
              __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);

            
              __m128i out01 = _mm_add_epi16(in01, kOne);

            
              __m128i out23 = _mm_add_epi16(in23, kOne);

            
              out01 = _mm_srai_epi16(out01, 2);

            
              out23 = _mm_srai_epi16(out23, 2);

            
              store_output(&out01, (output + 0 * 8));

            
              store_output(&out23, (output + 1 * 8));

            
            }


            static INLINE void transpose_4x4(__m128i *res) {

            
              // Combine and transpose

            
              // 00 01 02 03 20 21 22 23

            
              // 10 11 12 13 30 31 32 33

            
              const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);

            
              const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);


              // 00 10 01 11 02 12 03 13

            
              // 20 30 21 31 22 32 23 33

            
              res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);

            
              res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);


              // 00 10 20 30 01 11 21 31

            
              // 02 12 22 32 03 13 23 33

            
              // only use the first 4 16-bit integers

            
              res[1] = _mm_unpackhi_epi64(res[0], res[0]);

            
              res[3] = _mm_unpackhi_epi64(res[2], res[2]);

            
            }


            static void fdct4_sse2(__m128i *in) {

            
              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_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

            
              const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);


              __m128i u[4], v[4];

            
              u[0]=_mm_unpacklo_epi16(in[0], in[1]);

            
              u[1]=_mm_unpacklo_epi16(in[3], in[2]);


              v[0] = _mm_add_epi16(u[0], u[1]);

            
              v[1] = _mm_sub_epi16(u[0], u[1]);


              u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);  // 0

            
              u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16);  // 2

            
              u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24);  // 1

            
              u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08);  // 3


              v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

            
              u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

            
              u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

            
              u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

            
              u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);


              in[0] = _mm_packs_epi32(u[0], u[1]);

            
              in[1] = _mm_packs_epi32(u[2], u[3]);

            
              transpose_4x4(in);

            
            }


            static void fadst4_sse2(__m128i *in) {

            
              const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);

            
              const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);

            
              const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);

            
              const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);

            
              const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);

            
              const __m128i kZero = _mm_set1_epi16(0);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

            
              __m128i u[8], v[8];

            
              __m128i in7 = _mm_add_epi16(in[0], in[1]);


              u[0] = _mm_unpacklo_epi16(in[0], in[1]);

            
              u[1] = _mm_unpacklo_epi16(in[2], in[3]);

            
              u[2] = _mm_unpacklo_epi16(in7, kZero);

            
              u[3] = _mm_unpacklo_epi16(in[2], kZero);

            
              u[4] = _mm_unpacklo_epi16(in[3], kZero);


              v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02);  // s0 + s2

            
              v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04);  // s4 + s5

            
              v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x1

            
              v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01);  // s1 - s3

            
              v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02);  // -s4 + s6

            
              v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s4

            
              v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);


              u[0] = _mm_add_epi32(v[0], v[1]);

            
              u[1] = _mm_sub_epi32(v[2], v[6]);

            
              u[2] = _mm_add_epi32(v[3], v[4]);

            
              u[3] = _mm_sub_epi32(u[2], u[0]);

            
              u[4] = _mm_slli_epi32(v[5], 2);

            
              u[5] = _mm_sub_epi32(u[4], v[5]);

            
              u[6] = _mm_add_epi32(u[3], u[5]);


              v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);


              u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

            
              u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

            
              u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

            
              u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);


              in[0] = _mm_packs_epi32(u[0], u[2]);

            
              in[1] = _mm_packs_epi32(u[1], u[3]);

            
              transpose_4x4(in);

            
            }


            void vp9_fht4x4_sse2(const int16_t *input, tran_low_t *output,

            
                                 int stride, int tx_type) {

            
              __m128i in[4];


              switch (tx_type) {

            
                case DCT_DCT:

            
                  vpx_fdct4x4_sse2(input, output, stride);

            
                  break;

            
                case ADST_DCT:

            
                  load_buffer_4x4(input, in, stride);

            
                  fadst4_sse2(in);

            
                  fdct4_sse2(in);

            
                  write_buffer_4x4(output, in);

            
                  break;

            
                case DCT_ADST:

            
                  load_buffer_4x4(input, in, stride);

            
                  fdct4_sse2(in);

            
                  fadst4_sse2(in);

            
                  write_buffer_4x4(output, in);

            
                  break;

            
                case ADST_ADST:

            
                  load_buffer_4x4(input, in, stride);

            
                  fadst4_sse2(in);

            
                  fadst4_sse2(in);

            
                  write_buffer_4x4(output, in);

            
                  break;

            
               default:

            
                 assert(0);

            
                 break;

            
              }

            
            }


            void vp9_fdct8x8_quant_sse2(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__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_unpacklo_epi16(q6, q5);

            
                  const __m128i d1 = _mm_unpackhi_epi16(q6, q5);

            
                  const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);

            
                  const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);

            
                  const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);

            
                  const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);

            
                  // dct_const_round_shift

            
                  const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);

            
                  const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);

            
                  const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);

            
                  const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);

            
                  const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);

            
                  const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);

            
                  const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);

            
                  const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);

            
                  // Combine

            
                  const __m128i r0 = _mm_packs_epi32(s0, s1);

            
                  const __m128i r1 = _mm_packs_epi32(s2, s3);

            
                  // 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;

            
                {

            
                  __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;

            
                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);


                    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);

            
                  }


                  {

            
                    // 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;

            
              }

            
            }


            // load 8x8 array

            
            static INLINE void load_buffer_8x8(const int16_t *input, __m128i *in,

            
                                               int stride) {

            
              in[0]  = _mm_load_si128((const __m128i *)(input + 0 * stride));

            
              in[1]  = _mm_load_si128((const __m128i *)(input + 1 * stride));

            
              in[2]  = _mm_load_si128((const __m128i *)(input + 2 * stride));

            
              in[3]  = _mm_load_si128((const __m128i *)(input + 3 * stride));

            
              in[4]  = _mm_load_si128((const __m128i *)(input + 4 * stride));

            
              in[5]  = _mm_load_si128((const __m128i *)(input + 5 * stride));

            
              in[6]  = _mm_load_si128((const __m128i *)(input + 6 * stride));

            
              in[7]  = _mm_load_si128((const __m128i *)(input + 7 * stride));


              in[0] = _mm_slli_epi16(in[0], 2);

            
              in[1] = _mm_slli_epi16(in[1], 2);

            
              in[2] = _mm_slli_epi16(in[2], 2);

            
              in[3] = _mm_slli_epi16(in[3], 2);

            
              in[4] = _mm_slli_epi16(in[4], 2);

            
              in[5] = _mm_slli_epi16(in[5], 2);

            
              in[6] = _mm_slli_epi16(in[6], 2);

            
              in[7] = _mm_slli_epi16(in[7], 2);

            
            }


            // right shift and rounding

            
            static INLINE void right_shift_8x8(__m128i *res, const int bit) {

            
              __m128i sign0 = _mm_srai_epi16(res[0], 15);

            
              __m128i sign1 = _mm_srai_epi16(res[1], 15);

            
              __m128i sign2 = _mm_srai_epi16(res[2], 15);

            
              __m128i sign3 = _mm_srai_epi16(res[3], 15);

            
              __m128i sign4 = _mm_srai_epi16(res[4], 15);

            
              __m128i sign5 = _mm_srai_epi16(res[5], 15);

            
              __m128i sign6 = _mm_srai_epi16(res[6], 15);

            
              __m128i sign7 = _mm_srai_epi16(res[7], 15);


              if (bit == 2) {

            
                const __m128i const_rounding = _mm_set1_epi16(1);

            
                res[0] = _mm_add_epi16(res[0], const_rounding);

            
                res[1] = _mm_add_epi16(res[1], const_rounding);

            
                res[2] = _mm_add_epi16(res[2], const_rounding);

            
                res[3] = _mm_add_epi16(res[3], const_rounding);

            
                res[4] = _mm_add_epi16(res[4], const_rounding);

            
                res[5] = _mm_add_epi16(res[5], const_rounding);

            
                res[6] = _mm_add_epi16(res[6], const_rounding);

            
                res[7] = _mm_add_epi16(res[7], const_rounding);

            
              }


              res[0] = _mm_sub_epi16(res[0], sign0);

            
              res[1] = _mm_sub_epi16(res[1], sign1);

            
              res[2] = _mm_sub_epi16(res[2], sign2);

            
              res[3] = _mm_sub_epi16(res[3], sign3);

            
              res[4] = _mm_sub_epi16(res[4], sign4);

            
              res[5] = _mm_sub_epi16(res[5], sign5);

            
              res[6] = _mm_sub_epi16(res[6], sign6);

            
              res[7] = _mm_sub_epi16(res[7], sign7);


              if (bit == 1) {

            
                res[0] = _mm_srai_epi16(res[0], 1);

            
                res[1] = _mm_srai_epi16(res[1], 1);

            
                res[2] = _mm_srai_epi16(res[2], 1);

            
                res[3] = _mm_srai_epi16(res[3], 1);

            
                res[4] = _mm_srai_epi16(res[4], 1);

            
                res[5] = _mm_srai_epi16(res[5], 1);

            
                res[6] = _mm_srai_epi16(res[6], 1);

            
                res[7] = _mm_srai_epi16(res[7], 1);

            
              } else {

            
                res[0] = _mm_srai_epi16(res[0], 2);

            
                res[1] = _mm_srai_epi16(res[1], 2);

            
                res[2] = _mm_srai_epi16(res[2], 2);

            
                res[3] = _mm_srai_epi16(res[3], 2);

            
                res[4] = _mm_srai_epi16(res[4], 2);

            
                res[5] = _mm_srai_epi16(res[5], 2);

            
                res[6] = _mm_srai_epi16(res[6], 2);

            
                res[7] = _mm_srai_epi16(res[7], 2);

            
              }

            
            }


            // write 8x8 array

            
            static INLINE void write_buffer_8x8(tran_low_t *output, __m128i *res,

            
                                                int stride) {

            
              store_output(&res[0], (output + 0 * stride));

            
              store_output(&res[1], (output + 1 * stride));

            
              store_output(&res[2], (output + 2 * stride));

            
              store_output(&res[3], (output + 3 * stride));

            
              store_output(&res[4], (output + 4 * stride));

            
              store_output(&res[5], (output + 5 * stride));

            
              store_output(&res[6], (output + 6 * stride));

            
              store_output(&res[7], (output + 7 * stride));

            
            }


            // perform in-place transpose

            
            static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {

            
              const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);

            
              const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);

            
              const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);

            
              const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);

            
              const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);

            
              const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

            
              const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);

            
              const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

            
              // 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

            
              // 44 54 45 55 46 56 47 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_4, tr0_5);

            
              const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

            
              const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);

            
              const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);

            
              const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

            
              const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);

            
              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 25 35

            
              // 44 54 64 74 45 55 65 75

            
              // 06 16 26 36 07 17 27 37

            
              // 46 56 66 76 47 57 67 77

            
              res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);

            
              res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);

            
              res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);

            
              res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);

            
              res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);

            
              res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);

            
              res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);

            
              res[7] = _mm_unpackhi_epi64(tr1_6, 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

            
            }


            static void fdct8_sse2(__m128i *in) {

            
              // constants

            
              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);

            
              __m128i u0, u1, u2, u3, u4, u5, u6, u7;

            
              __m128i v0, v1, v2, v3, v4, v5, v6, v7;

            
              __m128i s0, s1, s2, s3, s4, s5, s6, s7;


              // stage 1

            
              s0 = _mm_add_epi16(in[0], in[7]);

            
              s1 = _mm_add_epi16(in[1], in[6]);

            
              s2 = _mm_add_epi16(in[2], in[5]);

            
              s3 = _mm_add_epi16(in[3], in[4]);

            
              s4 = _mm_sub_epi16(in[3], in[4]);

            
              s5 = _mm_sub_epi16(in[2], in[5]);

            
              s6 = _mm_sub_epi16(in[1], in[6]);

            
              s7 = _mm_sub_epi16(in[0], in[7]);


              u0 = _mm_add_epi16(s0, s3);

            
              u1 = _mm_add_epi16(s1, s2);

            
              u2 = _mm_sub_epi16(s1, s2);

            
              u3 = _mm_sub_epi16(s0, s3);

            
              // interleave and perform butterfly multiplication/addition

            
              v0 = _mm_unpacklo_epi16(u0, u1);

            
              v1 = _mm_unpackhi_epi16(u0, u1);

            
              v2 = _mm_unpacklo_epi16(u2, u3);

            
              v3 = _mm_unpackhi_epi16(u2, u3);


              u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);

            
              u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);

            
              u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);

            
              u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);

            
              u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);

            
              u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);

            
              u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);

            
              u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);


              // shift and rounding

            
              v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

            
              v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

            
              v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

            
              v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

            
              v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

            
              v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

            
              v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

            
              v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);


              u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

            
              u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

            
              u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

            
              u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

            
              u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

            
              u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

            
              u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

            
              u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);


              in[0] = _mm_packs_epi32(u0, u1);

            
              in[2] = _mm_packs_epi32(u4, u5);

            
              in[4] = _mm_packs_epi32(u2, u3);

            
              in[6] = _mm_packs_epi32(u6, u7);


              // stage 2

            
              // interleave and perform butterfly multiplication/addition

            
              u0 = _mm_unpacklo_epi16(s6, s5);

            
              u1 = _mm_unpackhi_epi16(s6, s5);

            
              v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);

            
              v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);

            
              v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);

            
              v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);


              // shift and rounding

            
              u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

            
              u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

            
              u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

            
              u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);


              v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

            
              v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

            
              v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

            
              v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);


              u0 = _mm_packs_epi32(v0, v1);

            
              u1 = _mm_packs_epi32(v2, v3);


              // stage 3

            
              s0 = _mm_add_epi16(s4, u0);

            
              s1 = _mm_sub_epi16(s4, u0);

            
              s2 = _mm_sub_epi16(s7, u1);

            
              s3 = _mm_add_epi16(s7, u1);


              // stage 4

            
              u0 = _mm_unpacklo_epi16(s0, s3);

            
              u1 = _mm_unpackhi_epi16(s0, s3);

            
              u2 = _mm_unpacklo_epi16(s1, s2);

            
              u3 = _mm_unpackhi_epi16(s1, s2);


              v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);

            
              v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);

            
              v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);

            
              v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);

            
              v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);

            
              v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);

            
              v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);

            
              v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);


              // shift and rounding

            
              u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

            
              u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

            
              u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

            
              u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

            
              u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

            
              u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

            
              u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

            
              u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);


              v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

            
              v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

            
              v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

            
              v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

            
              v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

            
              v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

            
              v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

            
              v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);


              in[1] = _mm_packs_epi32(v0, v1);

            
              in[3] = _mm_packs_epi32(v4, v5);

            
              in[5] = _mm_packs_epi32(v2, v3);

            
              in[7] = _mm_packs_epi32(v6, v7);


              // transpose

            
              array_transpose_8x8(in, in);

            
            }


            static void fadst8_sse2(__m128i *in) {

            
              // Constants

            
              const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);

            
              const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);

            
              const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);

            
              const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);

            
              const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);

            
              const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);

            
              const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);

            
              const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);

            
              const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

            
              const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

            
              const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

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

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

            
              const __m128i k__const_0 = _mm_set1_epi16(0);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);


              __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;

            
              __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;

            
              __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;

            
              __m128i s0, s1, s2, s3, s4, s5, s6, s7;

            
              __m128i in0, in1, in2, in3, in4, in5, in6, in7;


              // properly aligned for butterfly input

            
              in0  = in[7];

            
              in1  = in[0];

            
              in2  = in[5];

            
              in3  = in[2];

            
              in4  = in[3];

            
              in5  = in[4];

            
              in6  = in[1];

            
              in7  = in[6];


              // column transformation

            
              // stage 1

            
              // interleave and multiply/add into 32-bit integer

            
              s0 = _mm_unpacklo_epi16(in0, in1);

            
              s1 = _mm_unpackhi_epi16(in0, in1);

            
              s2 = _mm_unpacklo_epi16(in2, in3);

            
              s3 = _mm_unpackhi_epi16(in2, in3);

            
              s4 = _mm_unpacklo_epi16(in4, in5);

            
              s5 = _mm_unpackhi_epi16(in4, in5);

            
              s6 = _mm_unpacklo_epi16(in6, in7);

            
              s7 = _mm_unpackhi_epi16(in6, in7);


              u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);

            
              u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);

            
              u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);

            
              u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);

            
              u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);

            
              u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);

            
              u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);

            
              u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);

            
              u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);

            
              u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);

            
              u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);

            
              u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);

            
              u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);

            
              u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);

            
              u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);

            
              u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);


              // addition

            
              w0 = _mm_add_epi32(u0, u8);

            
              w1 = _mm_add_epi32(u1, u9);

            
              w2 = _mm_add_epi32(u2, u10);

            
              w3 = _mm_add_epi32(u3, u11);

            
              w4 = _mm_add_epi32(u4, u12);

            
              w5 = _mm_add_epi32(u5, u13);

            
              w6 = _mm_add_epi32(u6, u14);

            
              w7 = _mm_add_epi32(u7, u15);

            
              w8 = _mm_sub_epi32(u0, u8);

            
              w9 = _mm_sub_epi32(u1, u9);

            
              w10 = _mm_sub_epi32(u2, u10);

            
              w11 = _mm_sub_epi32(u3, u11);

            
              w12 = _mm_sub_epi32(u4, u12);

            
              w13 = _mm_sub_epi32(u5, u13);

            
              w14 = _mm_sub_epi32(u6, u14);

            
              w15 = _mm_sub_epi32(u7, u15);


              // shift and rounding

            
              v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

            
              v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

            
              v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

            
              v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

            
              v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

            
              v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

            
              v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

            
              v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

            
              v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);

            
              v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);

            
              v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);

            
              v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);

            
              v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);

            
              v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);

            
              v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);

            
              v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);


              u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

            
              u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

            
              u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

            
              u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

            
              u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

            
              u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

            
              u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

            
              u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

            
              u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);

            
              u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);

            
              u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);

            
              u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);

            
              u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);

            
              u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);

            
              u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);

            
              u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);


              // back to 16-bit and pack 8 integers into __m128i

            
              in[0] = _mm_packs_epi32(u0, u1);

            
              in[1] = _mm_packs_epi32(u2, u3);

            
              in[2] = _mm_packs_epi32(u4, u5);

            
              in[3] = _mm_packs_epi32(u6, u7);

            
              in[4] = _mm_packs_epi32(u8, u9);

            
              in[5] = _mm_packs_epi32(u10, u11);

            
              in[6] = _mm_packs_epi32(u12, u13);

            
              in[7] = _mm_packs_epi32(u14, u15);


              // stage 2

            
              s0 = _mm_add_epi16(in[0], in[2]);

            
              s1 = _mm_add_epi16(in[1], in[3]);

            
              s2 = _mm_sub_epi16(in[0], in[2]);

            
              s3 = _mm_sub_epi16(in[1], in[3]);

            
              u0 = _mm_unpacklo_epi16(in[4], in[5]);

            
              u1 = _mm_unpackhi_epi16(in[4], in[5]);

            
              u2 = _mm_unpacklo_epi16(in[6], in[7]);

            
              u3 = _mm_unpackhi_epi16(in[6], in[7]);


              v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);

            
              v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);

            
              v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);

            
              v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);

            
              v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);

            
              v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);

            
              v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);

            
              v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);


              w0 = _mm_add_epi32(v0, v4);

            
              w1 = _mm_add_epi32(v1, v5);

            
              w2 = _mm_add_epi32(v2, v6);

            
              w3 = _mm_add_epi32(v3, v7);

            
              w4 = _mm_sub_epi32(v0, v4);

            
              w5 = _mm_sub_epi32(v1, v5);

            
              w6 = _mm_sub_epi32(v2, v6);

            
              w7 = _mm_sub_epi32(v3, v7);


              v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

            
              v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

            
              v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

            
              v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

            
              v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

            
              v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

            
              v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

            
              v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);


              u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

            
              u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

            
              u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

            
              u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

            
              u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

            
              u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

            
              u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

            
              u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);


              // back to 16-bit intergers

            
              s4 = _mm_packs_epi32(u0, u1);

            
              s5 = _mm_packs_epi32(u2, u3);

            
              s6 = _mm_packs_epi32(u4, u5);

            
              s7 = _mm_packs_epi32(u6, u7);


              // stage 3

            
              u0 = _mm_unpacklo_epi16(s2, s3);

            
              u1 = _mm_unpackhi_epi16(s2, s3);

            
              u2 = _mm_unpacklo_epi16(s6, s7);

            
              u3 = _mm_unpackhi_epi16(s6, s7);


              v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);

            
              v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);

            
              v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);

            
              v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);

            
              v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);

            
              v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);

            
              v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);

            
              v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);


              u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

            
              u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

            
              u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

            
              u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

            
              u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

            
              u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

            
              u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

            
              u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);


              v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

            
              v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

            
              v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

            
              v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

            
              v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

            
              v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

            
              v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

            
              v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);


              s2 = _mm_packs_epi32(v0, v1);

            
              s3 = _mm_packs_epi32(v2, v3);

            
              s6 = _mm_packs_epi32(v4, v5);

            
              s7 = _mm_packs_epi32(v6, v7);


              // FIXME(jingning): do subtract using bit inversion?

            
              in[0] = s0;

            
              in[1] = _mm_sub_epi16(k__const_0, s4);

            
              in[2] = s6;

            
              in[3] = _mm_sub_epi16(k__const_0, s2);

            
              in[4] = s3;

            
              in[5] = _mm_sub_epi16(k__const_0, s7);

            
              in[6] = s5;

            
              in[7] = _mm_sub_epi16(k__const_0, s1);


              // transpose

            
              array_transpose_8x8(in, in);

            
            }


            void vp9_fht8x8_sse2(const int16_t *input, tran_low_t *output,

            
                                 int stride, int tx_type) {

            
              __m128i in[8];


              switch (tx_type) {

            
                case DCT_DCT:

            
                  vpx_fdct8x8_sse2(input, output, stride);

            
                  break;

            
                case ADST_DCT:

            
                  load_buffer_8x8(input, in, stride);

            
                  fadst8_sse2(in);

            
                  fdct8_sse2(in);

            
                  right_shift_8x8(in, 1);

            
                  write_buffer_8x8(output, in, 8);

            
                  break;

            
                case DCT_ADST:

            
                  load_buffer_8x8(input, in, stride);

            
                  fdct8_sse2(in);

            
                  fadst8_sse2(in);

            
                  right_shift_8x8(in, 1);

            
                  write_buffer_8x8(output, in, 8);

            
                  break;

            
                case ADST_ADST:

            
                  load_buffer_8x8(input, in, stride);

            
                  fadst8_sse2(in);

            
                  fadst8_sse2(in);

            
                  right_shift_8x8(in, 1);

            
                  write_buffer_8x8(output, in, 8);

            
                  break;

            
                default:

            
                  assert(0);

            
                  break;

            
              }

            
            }


            static INLINE void load_buffer_16x16(const int16_t* input, __m128i *in0,

            
                                                 __m128i *in1, int stride) {

            
              // load first 8 columns

            
              load_buffer_8x8(input, in0, stride);

            
              load_buffer_8x8(input + 8 * stride, in0 + 8, stride);


              input += 8;

            
              // load second 8 columns

            
              load_buffer_8x8(input, in1, stride);

            
              load_buffer_8x8(input + 8 * stride, in1 + 8, stride);

            
            }


            static INLINE void write_buffer_16x16(tran_low_t *output, __m128i *in0,

            
                                                  __m128i *in1, int stride) {

            
              // write first 8 columns

            
              write_buffer_8x8(output, in0, stride);

            
              write_buffer_8x8(output + 8 * stride, in0 + 8, stride);

            
              // write second 8 columns

            
              output += 8;

            
              write_buffer_8x8(output, in1, stride);

            
              write_buffer_8x8(output + 8 * stride, in1 + 8, stride);

            
            }


            static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {

            
              __m128i tbuf[8];

            
              array_transpose_8x8(res0, res0);

            
              array_transpose_8x8(res1, tbuf);

            
              array_transpose_8x8(res0 + 8, res1);

            
              array_transpose_8x8(res1 + 8, res1 + 8);


              res0[8] = tbuf[0];

            
              res0[9] = tbuf[1];

            
              res0[10] = tbuf[2];

            
              res0[11] = tbuf[3];

            
              res0[12] = tbuf[4];

            
              res0[13] = tbuf[5];

            
              res0[14] = tbuf[6];

            
              res0[15] = tbuf[7];

            
            }


            static INLINE void right_shift_16x16(__m128i *res0, __m128i *res1) {

            
              // perform rounding operations

            
              right_shift_8x8(res0, 2);

            
              right_shift_8x8(res0 + 8, 2);

            
              right_shift_8x8(res1, 2);

            
              right_shift_8x8(res1 + 8, 2);

            
            }


            static void fdct16_8col(__m128i *in) {

            
              // perform 16x16 1-D DCT for 8 columns

            
              __m128i i[8], s[8], p[8], t[8], u[16], v[16];

            
              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_m16_p16 = 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_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_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__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);

            
              const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);

            
              const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);

            
              const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);

            
              const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);

            
              const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);

            
              const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);

            
              const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);


              // stage 1

            
              i[0] = _mm_add_epi16(in[0], in[15]);

            
              i[1] = _mm_add_epi16(in[1], in[14]);

            
              i[2] = _mm_add_epi16(in[2], in[13]);

            
              i[3] = _mm_add_epi16(in[3], in[12]);

            
              i[4] = _mm_add_epi16(in[4], in[11]);

            
              i[5] = _mm_add_epi16(in[5], in[10]);

            
              i[6] = _mm_add_epi16(in[6], in[9]);

            
              i[7] = _mm_add_epi16(in[7], in[8]);


              s[0] = _mm_sub_epi16(in[7], in[8]);

            
              s[1] = _mm_sub_epi16(in[6], in[9]);

            
              s[2] = _mm_sub_epi16(in[5], in[10]);

            
              s[3] = _mm_sub_epi16(in[4], in[11]);

            
              s[4] = _mm_sub_epi16(in[3], in[12]);

            
              s[5] = _mm_sub_epi16(in[2], in[13]);

            
              s[6] = _mm_sub_epi16(in[1], in[14]);

            
              s[7] = _mm_sub_epi16(in[0], in[15]);


              p[0] = _mm_add_epi16(i[0], i[7]);

            
              p[1] = _mm_add_epi16(i[1], i[6]);

            
              p[2] = _mm_add_epi16(i[2], i[5]);

            
              p[3] = _mm_add_epi16(i[3], i[4]);

            
              p[4] = _mm_sub_epi16(i[3], i[4]);

            
              p[5] = _mm_sub_epi16(i[2], i[5]);

            
              p[6] = _mm_sub_epi16(i[1], i[6]);

            
              p[7] = _mm_sub_epi16(i[0], i[7]);


              u[0] = _mm_add_epi16(p[0], p[3]);

            
              u[1] = _mm_add_epi16(p[1], p[2]);

            
              u[2] = _mm_sub_epi16(p[1], p[2]);

            
              u[3] = _mm_sub_epi16(p[0], p[3]);


              v[0] = _mm_unpacklo_epi16(u[0], u[1]);

            
              v[1] = _mm_unpackhi_epi16(u[0], u[1]);

            
              v[2] = _mm_unpacklo_epi16(u[2], u[3]);

            
              v[3] = _mm_unpackhi_epi16(u[2], u[3]);


              u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);

            
              u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);

            
              u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);

            
              u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);

            
              u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);

            
              u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);

            
              u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);

            
              u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);


              v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

            
              v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

            
              v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

            
              v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

            
              v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);


              u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

            
              u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

            
              u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

            
              u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

            
              u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

            
              u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

            
              u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

            
              u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);


              in[0] = _mm_packs_epi32(u[0], u[1]);

            
              in[4] = _mm_packs_epi32(u[4], u[5]);

            
              in[8] = _mm_packs_epi32(u[2], u[3]);

            
              in[12] = _mm_packs_epi32(u[6], u[7]);


              u[0] = _mm_unpacklo_epi16(p[5], p[6]);

            
              u[1] = _mm_unpackhi_epi16(p[5], p[6]);

            
              v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

            
              v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

            
              v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);


              u[0] = _mm_packs_epi32(v[0], v[1]);

            
              u[1] = _mm_packs_epi32(v[2], v[3]);


              t[0] = _mm_add_epi16(p[4], u[0]);

            
              t[1] = _mm_sub_epi16(p[4], u[0]);

            
              t[2] = _mm_sub_epi16(p[7], u[1]);

            
              t[3] = _mm_add_epi16(p[7], u[1]);


              u[0] = _mm_unpacklo_epi16(t[0], t[3]);

            
              u[1] = _mm_unpackhi_epi16(t[0], t[3]);

            
              u[2] = _mm_unpacklo_epi16(t[1], t[2]);

            
              u[3] = _mm_unpackhi_epi16(t[1], t[2]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);

            
              v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);

            
              v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);

            
              v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);

            
              v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);


              in[2] = _mm_packs_epi32(v[0], v[1]);

            
              in[6] = _mm_packs_epi32(v[4], v[5]);

            
              in[10] = _mm_packs_epi32(v[2], v[3]);

            
              in[14] = _mm_packs_epi32(v[6], v[7]);


              // stage 2

            
              u[0] = _mm_unpacklo_epi16(s[2], s[5]);

            
              u[1] = _mm_unpackhi_epi16(s[2], s[5]);

            
              u[2] = _mm_unpacklo_epi16(s[3], s[4]);

            
              u[3] = _mm_unpackhi_epi16(s[3], s[4]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

            
              v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

            
              v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

            
              v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

            
              v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);


              t[2] = _mm_packs_epi32(v[0], v[1]);

            
              t[3] = _mm_packs_epi32(v[2], v[3]);

            
              t[4] = _mm_packs_epi32(v[4], v[5]);

            
              t[5] = _mm_packs_epi32(v[6], v[7]);


              // stage 3

            
              p[0] = _mm_add_epi16(s[0], t[3]);

            
              p[1] = _mm_add_epi16(s[1], t[2]);

            
              p[2] = _mm_sub_epi16(s[1], t[2]);

            
              p[3] = _mm_sub_epi16(s[0], t[3]);

            
              p[4] = _mm_sub_epi16(s[7], t[4]);

            
              p[5] = _mm_sub_epi16(s[6], t[5]);

            
              p[6] = _mm_add_epi16(s[6], t[5]);

            
              p[7] = _mm_add_epi16(s[7], t[4]);


              // stage 4

            
              u[0] = _mm_unpacklo_epi16(p[1], p[6]);

            
              u[1] = _mm_unpackhi_epi16(p[1], p[6]);

            
              u[2] = _mm_unpacklo_epi16(p[2], p[5]);

            
              u[3] = _mm_unpackhi_epi16(p[2], p[5]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);

            
              v[2] = _mm_madd_epi16(u[2], k__cospi_p24_p08);

            
              v[3] = _mm_madd_epi16(u[3], k__cospi_p24_p08);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_p08_m24);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_p08_m24);

            
              v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);

            
              v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);


              t[1] = _mm_packs_epi32(v[0], v[1]);

            
              t[2] = _mm_packs_epi32(v[2], v[3]);

            
              t[5] = _mm_packs_epi32(v[4], v[5]);

            
              t[6] = _mm_packs_epi32(v[6], v[7]);


              // stage 5

            
              s[0] = _mm_add_epi16(p[0], t[1]);

            
              s[1] = _mm_sub_epi16(p[0], t[1]);

            
              s[2] = _mm_add_epi16(p[3], t[2]);

            
              s[3] = _mm_sub_epi16(p[3], t[2]);

            
              s[4] = _mm_sub_epi16(p[4], t[5]);

            
              s[5] = _mm_add_epi16(p[4], t[5]);

            
              s[6] = _mm_sub_epi16(p[7], t[6]);

            
              s[7] = _mm_add_epi16(p[7], t[6]);


              // stage 6

            
              u[0] = _mm_unpacklo_epi16(s[0], s[7]);

            
              u[1] = _mm_unpackhi_epi16(s[0], s[7]);

            
              u[2] = _mm_unpacklo_epi16(s[1], s[6]);

            
              u[3] = _mm_unpackhi_epi16(s[1], s[6]);

            
              u[4] = _mm_unpacklo_epi16(s[2], s[5]);

            
              u[5] = _mm_unpackhi_epi16(s[2], s[5]);

            
              u[6] = _mm_unpacklo_epi16(s[3], s[4]);

            
              u[7] = _mm_unpackhi_epi16(s[3], s[4]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);

            
              v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);

            
              v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);

            
              v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);

            
              v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);

            
              v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);

            
              v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);

            
              v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);

            
              v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);

            
              v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);

            
              v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);

            
              v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);

            
              v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);

            
              v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);

            
              v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

            
              u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

            
              u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

            
              u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

            
              u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

            
              u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

            
              u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

            
              u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

            
              u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

            
              v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

            
              v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

            
              v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

            
              v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

            
              v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

            
              v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

            
              v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

            
              v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);


              in[1]  = _mm_packs_epi32(v[0], v[1]);

            
              in[9]  = _mm_packs_epi32(v[2], v[3]);

            
              in[5]  = _mm_packs_epi32(v[4], v[5]);

            
              in[13] = _mm_packs_epi32(v[6], v[7]);

            
              in[3]  = _mm_packs_epi32(v[8], v[9]);

            
              in[11] = _mm_packs_epi32(v[10], v[11]);

            
              in[7]  = _mm_packs_epi32(v[12], v[13]);

            
              in[15] = _mm_packs_epi32(v[14], v[15]);

            
            }


            static void fadst16_8col(__m128i *in) {

            
              // perform 16x16 1-D ADST for 8 columns

            
              __m128i s[16], x[16], u[32], v[32];

            
              const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);

            
              const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);

            
              const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);

            
              const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);

            
              const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);

            
              const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);

            
              const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);

            
              const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);

            
              const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);

            
              const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);

            
              const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);

            
              const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);

            
              const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);

            
              const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);

            
              const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);

            
              const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);

            
              const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);

            
              const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);

            
              const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);

            
              const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);

            
              const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);

            
              const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);

            
              const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

            
              const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

            
              const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

            
              const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);

            
              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_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

            
              const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

            
              const __m128i kZero = _mm_set1_epi16(0);


              u[0] = _mm_unpacklo_epi16(in[15], in[0]);

            
              u[1] = _mm_unpackhi_epi16(in[15], in[0]);

            
              u[2] = _mm_unpacklo_epi16(in[13], in[2]);

            
              u[3] = _mm_unpackhi_epi16(in[13], in[2]);

            
              u[4] = _mm_unpacklo_epi16(in[11], in[4]);

            
              u[5] = _mm_unpackhi_epi16(in[11], in[4]);

            
              u[6] = _mm_unpacklo_epi16(in[9], in[6]);

            
              u[7] = _mm_unpackhi_epi16(in[9], in[6]);

            
              u[8] = _mm_unpacklo_epi16(in[7], in[8]);

            
              u[9] = _mm_unpackhi_epi16(in[7], in[8]);

            
              u[10] = _mm_unpacklo_epi16(in[5], in[10]);

            
              u[11] = _mm_unpackhi_epi16(in[5], in[10]);

            
              u[12] = _mm_unpacklo_epi16(in[3], in[12]);

            
              u[13] = _mm_unpackhi_epi16(in[3], in[12]);

            
              u[14] = _mm_unpacklo_epi16(in[1], in[14]);

            
              u[15] = _mm_unpackhi_epi16(in[1], in[14]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);

            
              v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);

            
              v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);

            
              v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);

            
              v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);

            
              v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);

            
              v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);

            
              v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);

            
              v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);

            
              v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);

            
              v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);

            
              v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);

            
              v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);

            
              v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);

            
              v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);

            
              v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);

            
              v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);

            
              v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);

            
              v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);

            
              v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);

            
              v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);

            
              v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);

            
              v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);

            
              v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);

            
              v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);

            
              v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);

            
              v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);

            
              v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);

            
              v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);


              u[0] = _mm_add_epi32(v[0], v[16]);

            
              u[1] = _mm_add_epi32(v[1], v[17]);

            
              u[2] = _mm_add_epi32(v[2], v[18]);

            
              u[3] = _mm_add_epi32(v[3], v[19]);

            
              u[4] = _mm_add_epi32(v[4], v[20]);

            
              u[5] = _mm_add_epi32(v[5], v[21]);

            
              u[6] = _mm_add_epi32(v[6], v[22]);

            
              u[7] = _mm_add_epi32(v[7], v[23]);

            
              u[8] = _mm_add_epi32(v[8], v[24]);

            
              u[9] = _mm_add_epi32(v[9], v[25]);

            
              u[10] = _mm_add_epi32(v[10], v[26]);

            
              u[11] = _mm_add_epi32(v[11], v[27]);

            
              u[12] = _mm_add_epi32(v[12], v[28]);

            
              u[13] = _mm_add_epi32(v[13], v[29]);

            
              u[14] = _mm_add_epi32(v[14], v[30]);

            
              u[15] = _mm_add_epi32(v[15], v[31]);

            
              u[16] = _mm_sub_epi32(v[0], v[16]);

            
              u[17] = _mm_sub_epi32(v[1], v[17]);

            
              u[18] = _mm_sub_epi32(v[2], v[18]);

            
              u[19] = _mm_sub_epi32(v[3], v[19]);

            
              u[20] = _mm_sub_epi32(v[4], v[20]);

            
              u[21] = _mm_sub_epi32(v[5], v[21]);

            
              u[22] = _mm_sub_epi32(v[6], v[22]);

            
              u[23] = _mm_sub_epi32(v[7], v[23]);

            
              u[24] = _mm_sub_epi32(v[8], v[24]);

            
              u[25] = _mm_sub_epi32(v[9], v[25]);

            
              u[26] = _mm_sub_epi32(v[10], v[26]);

            
              u[27] = _mm_sub_epi32(v[11], v[27]);

            
              u[28] = _mm_sub_epi32(v[12], v[28]);

            
              u[29] = _mm_sub_epi32(v[13], v[29]);

            
              u[30] = _mm_sub_epi32(v[14], v[30]);

            
              u[31] = _mm_sub_epi32(v[15], v[31]);


              v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

            
              v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

            
              v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

            
              v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

            
              v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

            
              v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

            
              v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

            
              v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

            
              v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

            
              v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

            
              v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

            
              v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

            
              v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

            
              v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);

            
              v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);

            
              v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);

            
              v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);

            
              v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);

            
              v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);

            
              v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);

            
              v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);

            
              v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);

            
              v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);

            
              v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);

            
              v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);

            
              v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);

            
              v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);

            
              v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);

            
              v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);


              u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

            
              u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

            
              u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

            
              u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

            
              u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

            
              u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

            
              u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

            
              u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

            
              u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

            
              u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

            
              u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

            
              u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

            
              u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

            
              u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

            
              u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

            
              u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

            
              u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);

            
              u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);

            
              u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);

            
              u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);

            
              u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);

            
              u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);

            
              u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);

            
              u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);

            
              u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);

            
              u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);

            
              u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);

            
              u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);

            
              u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);

            
              u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);

            
              u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);

            
              u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);


              s[0] = _mm_packs_epi32(u[0], u[1]);

            
              s[1] = _mm_packs_epi32(u[2], u[3]);

            
              s[2] = _mm_packs_epi32(u[4], u[5]);

            
              s[3] = _mm_packs_epi32(u[6], u[7]);

            
              s[4] = _mm_packs_epi32(u[8], u[9]);

            
              s[5] = _mm_packs_epi32(u[10], u[11]);

            
              s[6] = _mm_packs_epi32(u[12], u[13]);

            
              s[7] = _mm_packs_epi32(u[14], u[15]);

            
              s[8] = _mm_packs_epi32(u[16], u[17]);

            
              s[9] = _mm_packs_epi32(u[18], u[19]);

            
              s[10] = _mm_packs_epi32(u[20], u[21]);

            
              s[11] = _mm_packs_epi32(u[22], u[23]);

            
              s[12] = _mm_packs_epi32(u[24], u[25]);

            
              s[13] = _mm_packs_epi32(u[26], u[27]);

            
              s[14] = _mm_packs_epi32(u[28], u[29]);

            
              s[15] = _mm_packs_epi32(u[30], u[31]);


              // stage 2

            
              u[0] = _mm_unpacklo_epi16(s[8], s[9]);

            
              u[1] = _mm_unpackhi_epi16(s[8], s[9]);

            
              u[2] = _mm_unpacklo_epi16(s[10], s[11]);

            
              u[3] = _mm_unpackhi_epi16(s[10], s[11]);

            
              u[4] = _mm_unpacklo_epi16(s[12], s[13]);

            
              u[5] = _mm_unpackhi_epi16(s[12], s[13]);

            
              u[6] = _mm_unpacklo_epi16(s[14], s[15]);

            
              u[7] = _mm_unpackhi_epi16(s[14], s[15]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);

            
              v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);

            
              v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);

            
              v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);

            
              v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);

            
              v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);

            
              v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);

            
              v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);

            
              v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);

            
              v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);

            
              v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);

            
              v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);

            
              v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);


              u[0] = _mm_add_epi32(v[0], v[8]);

            
              u[1] = _mm_add_epi32(v[1], v[9]);

            
              u[2] = _mm_add_epi32(v[2], v[10]);

            
              u[3] = _mm_add_epi32(v[3], v[11]);

            
              u[4] = _mm_add_epi32(v[4], v[12]);

            
              u[5] = _mm_add_epi32(v[5], v[13]);

            
              u[6] = _mm_add_epi32(v[6], v[14]);

            
              u[7] = _mm_add_epi32(v[7], v[15]);

            
              u[8] = _mm_sub_epi32(v[0], v[8]);

            
              u[9] = _mm_sub_epi32(v[1], v[9]);

            
              u[10] = _mm_sub_epi32(v[2], v[10]);

            
              u[11] = _mm_sub_epi32(v[3], v[11]);

            
              u[12] = _mm_sub_epi32(v[4], v[12]);

            
              u[13] = _mm_sub_epi32(v[5], v[13]);

            
              u[14] = _mm_sub_epi32(v[6], v[14]);

            
              u[15] = _mm_sub_epi32(v[7], v[15]);


              v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

            
              v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

            
              v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

            
              v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

            
              v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

            
              v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

            
              v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

            
              v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

            
              v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

            
              v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

            
              v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

            
              v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

            
              v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);


              u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

            
              u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

            
              u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

            
              u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

            
              u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

            
              u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

            
              u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

            
              u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

            
              u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

            
              u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

            
              u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

            
              u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

            
              u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

            
              u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

            
              u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

            
              u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);


              x[0] = _mm_add_epi16(s[0], s[4]);

            
              x[1] = _mm_add_epi16(s[1], s[5]);

            
              x[2] = _mm_add_epi16(s[2], s[6]);

            
              x[3] = _mm_add_epi16(s[3], s[7]);

            
              x[4] = _mm_sub_epi16(s[0], s[4]);

            
              x[5] = _mm_sub_epi16(s[1], s[5]);

            
              x[6] = _mm_sub_epi16(s[2], s[6]);

            
              x[7] = _mm_sub_epi16(s[3], s[7]);

            
              x[8] = _mm_packs_epi32(u[0], u[1]);

            
              x[9] = _mm_packs_epi32(u[2], u[3]);

            
              x[10] = _mm_packs_epi32(u[4], u[5]);

            
              x[11] = _mm_packs_epi32(u[6], u[7]);

            
              x[12] = _mm_packs_epi32(u[8], u[9]);

            
              x[13] = _mm_packs_epi32(u[10], u[11]);

            
              x[14] = _mm_packs_epi32(u[12], u[13]);

            
              x[15] = _mm_packs_epi32(u[14], u[15]);


              // stage 3

            
              u[0] = _mm_unpacklo_epi16(x[4], x[5]);

            
              u[1] = _mm_unpackhi_epi16(x[4], x[5]);

            
              u[2] = _mm_unpacklo_epi16(x[6], x[7]);

            
              u[3] = _mm_unpackhi_epi16(x[6], x[7]);

            
              u[4] = _mm_unpacklo_epi16(x[12], x[13]);

            
              u[5] = _mm_unpackhi_epi16(x[12], x[13]);

            
              u[6] = _mm_unpacklo_epi16(x[14], x[15]);

            
              u[7] = _mm_unpackhi_epi16(x[14], x[15]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);

            
              v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);

            
              v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);

            
              v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);

            
              v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);

            
              v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);

            
              v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);

            
              v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);

            
              v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);

            
              v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);

            
              v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);

            
              v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);

            
              v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);


              u[0] = _mm_add_epi32(v[0], v[4]);

            
              u[1] = _mm_add_epi32(v[1], v[5]);

            
              u[2] = _mm_add_epi32(v[2], v[6]);

            
              u[3] = _mm_add_epi32(v[3], v[7]);

            
              u[4] = _mm_sub_epi32(v[0], v[4]);

            
              u[5] = _mm_sub_epi32(v[1], v[5]);

            
              u[6] = _mm_sub_epi32(v[2], v[6]);

            
              u[7] = _mm_sub_epi32(v[3], v[7]);

            
              u[8] = _mm_add_epi32(v[8], v[12]);

            
              u[9] = _mm_add_epi32(v[9], v[13]);

            
              u[10] = _mm_add_epi32(v[10], v[14]);

            
              u[11] = _mm_add_epi32(v[11], v[15]);

            
              u[12] = _mm_sub_epi32(v[8], v[12]);

            
              u[13] = _mm_sub_epi32(v[9], v[13]);

            
              u[14] = _mm_sub_epi32(v[10], v[14]);

            
              u[15] = _mm_sub_epi32(v[11], v[15]);


              u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

            
              u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

            
              u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

            
              u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

            
              u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

            
              u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

            
              u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

            
              u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

            
              u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

            
              v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

            
              v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

            
              v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

            
              v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

            
              v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

            
              v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

            
              v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

            
              v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);


              s[0] = _mm_add_epi16(x[0], x[2]);

            
              s[1] = _mm_add_epi16(x[1], x[3]);

            
              s[2] = _mm_sub_epi16(x[0], x[2]);

            
              s[3] = _mm_sub_epi16(x[1], x[3]);

            
              s[4] = _mm_packs_epi32(v[0], v[1]);

            
              s[5] = _mm_packs_epi32(v[2], v[3]);

            
              s[6] = _mm_packs_epi32(v[4], v[5]);

            
              s[7] = _mm_packs_epi32(v[6], v[7]);

            
              s[8] = _mm_add_epi16(x[8], x[10]);

            
              s[9] = _mm_add_epi16(x[9], x[11]);

            
              s[10] = _mm_sub_epi16(x[8], x[10]);

            
              s[11] = _mm_sub_epi16(x[9], x[11]);

            
              s[12] = _mm_packs_epi32(v[8], v[9]);

            
              s[13] = _mm_packs_epi32(v[10], v[11]);

            
              s[14] = _mm_packs_epi32(v[12], v[13]);

            
              s[15] = _mm_packs_epi32(v[14], v[15]);


              // stage 4

            
              u[0] = _mm_unpacklo_epi16(s[2], s[3]);

            
              u[1] = _mm_unpackhi_epi16(s[2], s[3]);

            
              u[2] = _mm_unpacklo_epi16(s[6], s[7]);

            
              u[3] = _mm_unpackhi_epi16(s[6], s[7]);

            
              u[4] = _mm_unpacklo_epi16(s[10], s[11]);

            
              u[5] = _mm_unpackhi_epi16(s[10], s[11]);

            
              u[6] = _mm_unpacklo_epi16(s[14], s[15]);

            
              u[7] = _mm_unpackhi_epi16(s[14], s[15]);


              v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);

            
              v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);

            
              v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);

            
              v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);

            
              v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

            
              v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

            
              v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

            
              v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

            
              v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);

            
              v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);

            
              v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);

            
              v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);

            
              v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);

            
              v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);

            
              v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);

            
              v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);


              u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

            
              u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

            
              u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

            
              u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

            
              u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

            
              u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

            
              u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

            
              u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

            
              u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

            
              u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

            
              u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

            
              u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

            
              u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

            
              u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

            
              u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

            
              u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);


              v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

            
              v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

            
              v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

            
              v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

            
              v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

            
              v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

            
              v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

            
              v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

            
              v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

            
              v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

            
              v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

            
              v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

            
              v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

            
              v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

            
              v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

            
              v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);


              in[0] = s[0];

            
              in[1] = _mm_sub_epi16(kZero, s[8]);

            
              in[2] = s[12];

            
              in[3] = _mm_sub_epi16(kZero, s[4]);

            
              in[4] = _mm_packs_epi32(v[4], v[5]);

            
              in[5] = _mm_packs_epi32(v[12], v[13]);

            
              in[6] = _mm_packs_epi32(v[8], v[9]);

            
              in[7] = _mm_packs_epi32(v[0], v[1]);

            
              in[8] = _mm_packs_epi32(v[2], v[3]);

            
              in[9] = _mm_packs_epi32(v[10], v[11]);

            
              in[10] = _mm_packs_epi32(v[14], v[15]);

            
              in[11] = _mm_packs_epi32(v[6], v[7]);

            
              in[12] = s[5];

            
              in[13] = _mm_sub_epi16(kZero, s[13]);

            
              in[14] = s[9];

            
              in[15] = _mm_sub_epi16(kZero, s[1]);

            
            }


            static void fdct16_sse2(__m128i *in0, __m128i *in1) {

            
              fdct16_8col(in0);

            
              fdct16_8col(in1);

            
              array_transpose_16x16(in0, in1);

            
            }


            static void fadst16_sse2(__m128i *in0, __m128i *in1) {

            
              fadst16_8col(in0);

            
              fadst16_8col(in1);

            
              array_transpose_16x16(in0, in1);

            
            }


            void vp9_fht16x16_sse2(const int16_t *input, tran_low_t *output,

            
                                   int stride, int tx_type) {

            
              __m128i in0[16], in1[16];


              switch (tx_type) {

            
                case DCT_DCT:

            
                  vpx_fdct16x16_sse2(input, output, stride);

            
                  break;

            
                case ADST_DCT:

            
                  load_buffer_16x16(input, in0, in1, stride);

            
                  fadst16_sse2(in0, in1);

            
                  right_shift_16x16(in0, in1);

            
                  fdct16_sse2(in0, in1);

            
                  write_buffer_16x16(output, in0, in1, 16);

            
                  break;

            
                case DCT_ADST:

            
                  load_buffer_16x16(input, in0, in1, stride);

            
                  fdct16_sse2(in0, in1);

            
                  right_shift_16x16(in0, in1);

            
                  fadst16_sse2(in0, in1);

            
                  write_buffer_16x16(output, in0, in1, 16);

            
                  break;

            
                case ADST_ADST:

            
                  load_buffer_16x16(input, in0, in1, stride);

            
                  fadst16_sse2(in0, in1);

            
                  right_shift_16x16(in0, in1);

            
                  fadst16_sse2(in0, in1);

            
                  write_buffer_16x16(output, in0, in1, 16);

            
                  break;

            
                default:

            
                  assert(0);

            
                  break;

            
              }

            
            }