static void filter_horiz_w4_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
uint8_t *dst, const int16_t *filter) {
const __m128i k_256 = _mm_set1_epi16(1 << 8);
const __m128i f_values = _mm_load_si128((const __m128i *)filter);
// pack and duplicate the filter values
const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
const __m128i A = _mm_loadl_epi64((const __m128i *)src_ptr);
const __m128i B = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch));
const __m128i C = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 2));
const __m128i D = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 3));
// TRANSPOSE...
// 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
//
// TO
//
// 00 10 20 30
// 01 11 21 31
// 02 12 22 32
// 03 13 23 33
// 04 14 24 34
// 05 15 25 35
// 06 16 26 36
// 07 17 27 37
//
// 00 01 10 11 02 03 12 13 04 05 14 15 06 07 16 17
const __m128i tr0_0 = _mm_unpacklo_epi16(A, B);
// 20 21 30 31 22 23 32 33 24 25 34 35 26 27 36 37
const __m128i tr0_1 = _mm_unpacklo_epi16(C, D);
// 00 01 10 11 20 21 30 31 02 03 12 13 22 23 32 33
const __m128i s1s0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
// 04 05 14 15 24 25 34 35 06 07 16 17 26 27 36 37
const __m128i s5s4 = _mm_unpackhi_epi32(tr0_0, tr0_1);
// 02 03 12 13 22 23 32 33
const __m128i s3s2 = _mm_srli_si128(s1s0, 8);
// 06 07 16 17 26 27 36 37
const __m128i s7s6 = _mm_srli_si128(s5s4, 8);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
// add and saturate the results together
const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
__m128i temp = _mm_adds_epi16(x0, x3);
temp = _mm_adds_epi16(temp, min_x2x1);
temp = _mm_adds_epi16(temp, max_x2x1);
// round and shift by 7 bit each 16 bit
temp = _mm_mulhrs_epi16(temp, k_256);
// shrink to 8 bit each 16 bits
temp = _mm_packus_epi16(temp, temp);
// save only 4 bytes
*(int *)dst = _mm_cvtsi128_si32(temp);
}
static INLINE __m128i predict_unclipped(const __m128i *input, __m128i alpha_q12,
__m128i alpha_sign, __m128i dc_q0) {
__m128i ac_q3 = _mm_loadu_si128(input);
__m128i ac_sign = _mm_sign_epi16(alpha_sign, ac_q3);
__m128i scaled_luma_q0 = _mm_mulhrs_epi16(_mm_abs_epi16(ac_q3), alpha_q12);
scaled_luma_q0 = _mm_sign_epi16(scaled_luma_q0, ac_sign);
return _mm_add_epi16(scaled_luma_q0, dc_q0);
}
static void filter_horiz_w8_ssse3(const uint8_t *src_x, ptrdiff_t src_pitch,
uint8_t *dst, const int16_t *x_filter) {
const __m128i k_256 = _mm_set1_epi16(1 << 8);
const __m128i f_values = _mm_load_si128((const __m128i *)x_filter);
// pack and duplicate the filter values
const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
const __m128i A = _mm_loadl_epi64((const __m128i *)src_x);
const __m128i B = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch));
const __m128i C = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 2));
const __m128i D = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 3));
const __m128i E = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 4));
const __m128i F = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 5));
const __m128i G = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 6));
const __m128i H = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 7));
// 00 01 10 11 02 03 12 13 04 05 14 15 06 07 16 17
const __m128i tr0_0 = _mm_unpacklo_epi16(A, B);
// 20 21 30 31 22 23 32 33 24 25 34 35 26 27 36 37
const __m128i tr0_1 = _mm_unpacklo_epi16(C, D);
// 40 41 50 51 42 43 52 53 44 45 54 55 46 47 56 57
const __m128i tr0_2 = _mm_unpacklo_epi16(E, F);
// 60 61 70 71 62 63 72 73 64 65 74 75 66 67 76 77
const __m128i tr0_3 = _mm_unpacklo_epi16(G, H);
// 00 01 10 11 20 21 30 31 02 03 12 13 22 23 32 33
const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
// 04 05 14 15 24 25 34 35 06 07 16 17 26 27 36 37
const __m128i tr1_1 = _mm_unpackhi_epi32(tr0_0, tr0_1);
// 40 41 50 51 60 61 70 71 42 43 52 53 62 63 72 73
const __m128i tr1_2 = _mm_unpacklo_epi32(tr0_2, tr0_3);
// 44 45 54 55 64 65 74 75 46 47 56 57 66 67 76 77
const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
// 00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71
const __m128i s1s0 = _mm_unpacklo_epi64(tr1_0, tr1_2);
const __m128i s3s2 = _mm_unpackhi_epi64(tr1_0, tr1_2);
const __m128i s5s4 = _mm_unpacklo_epi64(tr1_1, tr1_3);
const __m128i s7s6 = _mm_unpackhi_epi64(tr1_1, tr1_3);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
// add and saturate the results together
const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
__m128i temp = _mm_adds_epi16(x0, x3);
temp = _mm_adds_epi16(temp, min_x2x1);
temp = _mm_adds_epi16(temp, max_x2x1);
// round and shift by 7 bit each 16 bit
temp = _mm_mulhrs_epi16(temp, k_256);
// shrink to 8 bit each 16 bits
temp = _mm_packus_epi16(temp, temp);
// save only 8 bytes convolve result
_mm_storel_epi64((__m128i *)dst, temp);
}
void m16_vv_mulhrs(int16_t *x, int16_t *y, int16_t *z, int N){
__m128i *x128, *y128, *z128;
x128 = (__m128i *)x;
y128 = (__m128i *)y;
z128 = (__m128i *)z;
int i;
for(i=0;i<(N>>3); i++){
z128[i] = _mm_slli_epi16( _mm_mulhrs_epi16(x128[i], y128[i]),1);
}
}
static INLINE void init_qp(const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *dequant_ptr, int log_scale,
__m256i *qp) {
__m128i round = _mm_loadu_si128((const __m128i *)round_ptr);
if (log_scale) {
const __m128i round_scale = _mm_set1_epi16(1 << (15 - log_scale));
round = _mm_mulhrs_epi16(round, round_scale);
}
const __m128i quant = _mm_loadu_si128((const __m128i *)quant_ptr);
const __m128i dequant = _mm_loadu_si128((const __m128i *)dequant_ptr);
init_one_qp(&round, &qp[0]);
init_one_qp(&quant, &qp[1]);
init_one_qp(&dequant, &qp[2]);
}
static void filter_vert_w8_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
uint8_t *dst, const int16_t *filter) {
const __m128i k_256 = _mm_set1_epi16(1 << 8);
const __m128i f_values = _mm_load_si128((const __m128i *)filter);
// pack and duplicate the filter values
const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
const __m128i A = _mm_loadl_epi64((const __m128i *)src_ptr);
const __m128i B = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch));
const __m128i C = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 2));
const __m128i D = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 3));
const __m128i E = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 4));
const __m128i F = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 5));
const __m128i G = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 6));
const __m128i H = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 7));
const __m128i s1s0 = _mm_unpacklo_epi8(A, B);
const __m128i s3s2 = _mm_unpacklo_epi8(C, D);
const __m128i s5s4 = _mm_unpacklo_epi8(E, F);
const __m128i s7s6 = _mm_unpacklo_epi8(G, H);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
// add and saturate the results together
const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
__m128i temp = _mm_adds_epi16(x0, x3);
temp = _mm_adds_epi16(temp, min_x2x1);
temp = _mm_adds_epi16(temp, max_x2x1);
// round and shift by 7 bit each 16 bit
temp = _mm_mulhrs_epi16(temp, k_256);
// shrink to 8 bit each 16 bits
temp = _mm_packus_epi16(temp, temp);
// save only 8 bytes convolve result
_mm_storel_epi64((__m128i *)dst, temp);
}
static void filter_vert_w16_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
uint8_t *dst, const int16_t *filter, int w) {
const __m128i k_256 = _mm_set1_epi16(1 << 8);
const __m128i f_values = _mm_load_si128((const __m128i *)filter);
// pack and duplicate the filter values
const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
int i;
for (i = 0; i < w; i += 16) {
const __m128i A = _mm_loadu_si128((const __m128i *)src_ptr);
const __m128i B = _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch));
const __m128i C =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 2));
const __m128i D =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 3));
const __m128i E =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 4));
const __m128i F =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 5));
const __m128i G =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 6));
const __m128i H =
_mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 7));
// merge the result together
const __m128i s1s0_lo = _mm_unpacklo_epi8(A, B);
const __m128i s7s6_lo = _mm_unpacklo_epi8(G, H);
const __m128i s1s0_hi = _mm_unpackhi_epi8(A, B);
const __m128i s7s6_hi = _mm_unpackhi_epi8(G, H);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x0_lo = _mm_maddubs_epi16(s1s0_lo, f1f0);
const __m128i x3_lo = _mm_maddubs_epi16(s7s6_lo, f7f6);
const __m128i x0_hi = _mm_maddubs_epi16(s1s0_hi, f1f0);
const __m128i x3_hi = _mm_maddubs_epi16(s7s6_hi, f7f6);
// add and saturate the results together
const __m128i x3x0_lo = _mm_adds_epi16(x0_lo, x3_lo);
const __m128i x3x0_hi = _mm_adds_epi16(x0_hi, x3_hi);
// merge the result together
const __m128i s3s2_lo = _mm_unpacklo_epi8(C, D);
const __m128i s3s2_hi = _mm_unpackhi_epi8(C, D);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x1_lo = _mm_maddubs_epi16(s3s2_lo, f3f2);
const __m128i x1_hi = _mm_maddubs_epi16(s3s2_hi, f3f2);
// merge the result together
const __m128i s5s4_lo = _mm_unpacklo_epi8(E, F);
const __m128i s5s4_hi = _mm_unpackhi_epi8(E, F);
// multiply 2 adjacent elements with the filter and add the result
const __m128i x2_lo = _mm_maddubs_epi16(s5s4_lo, f5f4);
const __m128i x2_hi = _mm_maddubs_epi16(s5s4_hi, f5f4);
// add and saturate the results together
__m128i temp_lo = _mm_adds_epi16(x3x0_lo, _mm_min_epi16(x1_lo, x2_lo));
__m128i temp_hi = _mm_adds_epi16(x3x0_hi, _mm_min_epi16(x1_hi, x2_hi));
// add and saturate the results together
temp_lo = _mm_adds_epi16(temp_lo, _mm_max_epi16(x1_lo, x2_lo));
temp_hi = _mm_adds_epi16(temp_hi, _mm_max_epi16(x1_hi, x2_hi));
// round and shift by 7 bit each 16 bit
temp_lo = _mm_mulhrs_epi16(temp_lo, k_256);
temp_hi = _mm_mulhrs_epi16(temp_hi, k_256);
// shrink to 8 bit each 16 bits, the first lane contain the first
// convolve result and the second lane contain the second convolve
// result
temp_hi = _mm_packus_epi16(temp_lo, temp_hi);
src_ptr += 16;
// save 16 bytes convolve result
_mm_store_si128((__m128i *)&dst[i], temp_hi);
}
}
__m128i test_mm_mulhrs_epi16(__m128i a, __m128i b) {
// CHECK-LABEL: test_mm_mulhrs_epi16
// CHECK: call <8 x i16> @llvm.x86.ssse3.pmul.hr.sw.128(<8 x i16> %{{.*}}, <8 x i16> %{{.*}})
return _mm_mulhrs_epi16(a, b);
}
void vp9_fdct8x8_quant_ssse3(
const int16_t *input, int stride, tran_low_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,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
uint16_t *eob_ptr, const int16_t *scan_ptr, const int16_t *iscan_ptr) {
__m128i zero;
int pass;
// Constants
// When we use them, in one case, they are all the same. In all others
// it's a pair of them that we need to repeat four times. This is done
// by constructing the 32 bit constant corresponding to that pair.
const __m128i k__dual_p16_p16 = dual_set_epi16(23170, 23170);
const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
// Load input
__m128i in0 = _mm_load_si128((const __m128i *)(input + 0 * stride));
__m128i in1 = _mm_load_si128((const __m128i *)(input + 1 * stride));
__m128i in2 = _mm_load_si128((const __m128i *)(input + 2 * stride));
__m128i in3 = _mm_load_si128((const __m128i *)(input + 3 * stride));
__m128i in4 = _mm_load_si128((const __m128i *)(input + 4 * stride));
__m128i in5 = _mm_load_si128((const __m128i *)(input + 5 * stride));
__m128i in6 = _mm_load_si128((const __m128i *)(input + 6 * stride));
__m128i in7 = _mm_load_si128((const __m128i *)(input + 7 * stride));
__m128i *in[8];
int index = 0;
(void)scan_ptr;
(void)zbin_ptr;
(void)quant_shift_ptr;
(void)coeff_ptr;
// Pre-condition input (shift by two)
in0 = _mm_slli_epi16(in0, 2);
in1 = _mm_slli_epi16(in1, 2);
in2 = _mm_slli_epi16(in2, 2);
in3 = _mm_slli_epi16(in3, 2);
in4 = _mm_slli_epi16(in4, 2);
in5 = _mm_slli_epi16(in5, 2);
in6 = _mm_slli_epi16(in6, 2);
in7 = _mm_slli_epi16(in7, 2);
in[0] = &in0;
in[1] = &in1;
in[2] = &in2;
in[3] = &in3;
in[4] = &in4;
in[5] = &in5;
in[6] = &in6;
in[7] = &in7;
// We do two passes, first the columns, then the rows. The results of the
// first pass are transposed so that the same column code can be reused. The
// results of the second pass are also transposed so that the rows (processed
// as columns) are put back in row positions.
for (pass = 0; pass < 2; pass++) {
// To store results of each pass before the transpose.
__m128i res0, res1, res2, res3, res4, res5, res6, res7;
// Add/subtract
const __m128i q0 = _mm_add_epi16(in0, in7);
const __m128i q1 = _mm_add_epi16(in1, in6);
const __m128i q2 = _mm_add_epi16(in2, in5);
const __m128i q3 = _mm_add_epi16(in3, in4);
const __m128i q4 = _mm_sub_epi16(in3, in4);
const __m128i q5 = _mm_sub_epi16(in2, in5);
const __m128i q6 = _mm_sub_epi16(in1, in6);
const __m128i q7 = _mm_sub_epi16(in0, in7);
// Work on first four results
{
// Add/subtract
const __m128i r0 = _mm_add_epi16(q0, q3);
const __m128i r1 = _mm_add_epi16(q1, q2);
const __m128i r2 = _mm_sub_epi16(q1, q2);
const __m128i r3 = _mm_sub_epi16(q0, q3);
// Interleave to do the multiply by constants which gets us into 32bits
const __m128i t0 = _mm_unpacklo_epi16(r0, r1);
const __m128i t1 = _mm_unpackhi_epi16(r0, r1);
const __m128i t2 = _mm_unpacklo_epi16(r2, r3);
const __m128i t3 = _mm_unpackhi_epi16(r2, r3);
const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);
const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);
const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);
const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);
const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);
const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);
const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);
// dct_const_round_shift
const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
// Combine
res0 = _mm_packs_epi32(w0, w1);
res4 = _mm_packs_epi32(w2, w3);
res2 = _mm_packs_epi32(w4, w5);
res6 = _mm_packs_epi32(w6, w7);
}
// Work on next four results
{
// Interleave to do the multiply by constants which gets us into 32bits
const __m128i d0 = _mm_sub_epi16(q6, q5);
const __m128i d1 = _mm_add_epi16(q6, q5);
const __m128i r0 = _mm_mulhrs_epi16(d0, k__dual_p16_p16);
const __m128i r1 = _mm_mulhrs_epi16(d1, k__dual_p16_p16);
// Add/subtract
const __m128i x0 = _mm_add_epi16(q4, r0);
const __m128i x1 = _mm_sub_epi16(q4, r0);
const __m128i x2 = _mm_sub_epi16(q7, r1);
const __m128i x3 = _mm_add_epi16(q7, r1);
// Interleave to do the multiply by constants which gets us into 32bits
const __m128i t0 = _mm_unpacklo_epi16(x0, x3);
const __m128i t1 = _mm_unpackhi_epi16(x0, x3);
const __m128i t2 = _mm_unpacklo_epi16(x1, x2);
const __m128i t3 = _mm_unpackhi_epi16(x1, x2);
const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);
const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);
const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);
const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);
const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);
const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);
const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);
const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);
// dct_const_round_shift
const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
// Combine
res1 = _mm_packs_epi32(w0, w1);
res7 = _mm_packs_epi32(w2, w3);
res5 = _mm_packs_epi32(w4, w5);
res3 = _mm_packs_epi32(w6, w7);
}
// Transpose the 8x8.
{
// 00 01 02 03 04 05 06 07
// 10 11 12 13 14 15 16 17
// 20 21 22 23 24 25 26 27
// 30 31 32 33 34 35 36 37
// 40 41 42 43 44 45 46 47
// 50 51 52 53 54 55 56 57
// 60 61 62 63 64 65 66 67
// 70 71 72 73 74 75 76 77
const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);
const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);
const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);
const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);
const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);
const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);
const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);
const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);
// 00 10 01 11 02 12 03 13
// 20 30 21 31 22 32 23 33
// 04 14 05 15 06 16 07 17
// 24 34 25 35 26 36 27 37
// 40 50 41 51 42 52 43 53
// 60 70 61 71 62 72 63 73
// 54 54 55 55 56 56 57 57
// 64 74 65 75 66 76 67 77
const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);
const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
// 00 10 20 30 01 11 21 31
// 40 50 60 70 41 51 61 71
// 02 12 22 32 03 13 23 33
// 42 52 62 72 43 53 63 73
// 04 14 24 34 05 15 21 36
// 44 54 64 74 45 55 61 76
// 06 16 26 36 07 17 27 37
// 46 56 66 76 47 57 67 77
in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);
in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);
in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);
in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);
in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);
in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);
in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);
in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);
// 00 10 20 30 40 50 60 70
// 01 11 21 31 41 51 61 71
// 02 12 22 32 42 52 62 72
// 03 13 23 33 43 53 63 73
// 04 14 24 34 44 54 64 74
// 05 15 25 35 45 55 65 75
// 06 16 26 36 46 56 66 76
// 07 17 27 37 47 57 67 77
}
}
// Post-condition output and store it
{
// Post-condition (division by two)
// division of two 16 bits signed numbers using shifts
// n / 2 = (n - (n >> 15)) >> 1
const __m128i sign_in0 = _mm_srai_epi16(in0, 15);
const __m128i sign_in1 = _mm_srai_epi16(in1, 15);
const __m128i sign_in2 = _mm_srai_epi16(in2, 15);
const __m128i sign_in3 = _mm_srai_epi16(in3, 15);
const __m128i sign_in4 = _mm_srai_epi16(in4, 15);
const __m128i sign_in5 = _mm_srai_epi16(in5, 15);
const __m128i sign_in6 = _mm_srai_epi16(in6, 15);
const __m128i sign_in7 = _mm_srai_epi16(in7, 15);
in0 = _mm_sub_epi16(in0, sign_in0);
in1 = _mm_sub_epi16(in1, sign_in1);
in2 = _mm_sub_epi16(in2, sign_in2);
in3 = _mm_sub_epi16(in3, sign_in3);
in4 = _mm_sub_epi16(in4, sign_in4);
in5 = _mm_sub_epi16(in5, sign_in5);
in6 = _mm_sub_epi16(in6, sign_in6);
in7 = _mm_sub_epi16(in7, sign_in7);
in0 = _mm_srai_epi16(in0, 1);
in1 = _mm_srai_epi16(in1, 1);
in2 = _mm_srai_epi16(in2, 1);
in3 = _mm_srai_epi16(in3, 1);
in4 = _mm_srai_epi16(in4, 1);
in5 = _mm_srai_epi16(in5, 1);
in6 = _mm_srai_epi16(in6, 1);
in7 = _mm_srai_epi16(in7, 1);
}
iscan_ptr += n_coeffs;
qcoeff_ptr += n_coeffs;
dqcoeff_ptr += n_coeffs;
n_coeffs = -n_coeffs;
zero = _mm_setzero_si128();
if (!skip_block) {
__m128i eob;
__m128i round, quant, dequant, thr;
int16_t nzflag;
{
__m128i coeff0, coeff1;
// Setup global values
{
round = _mm_load_si128((const __m128i *)round_ptr);
quant = _mm_load_si128((const __m128i *)quant_ptr);
dequant = _mm_load_si128((const __m128i *)dequant_ptr);
}
{
__m128i coeff0_sign, coeff1_sign;
__m128i qcoeff0, qcoeff1;
__m128i qtmp0, qtmp1;
// Do DC and first 15 AC
coeff0 = *in[0];
coeff1 = *in[1];
// Poor man's sign extract
coeff0_sign = _mm_srai_epi16(coeff0, 15);
coeff1_sign = _mm_srai_epi16(coeff1, 15);
qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);
qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
round = _mm_unpackhi_epi64(round, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
quant = _mm_unpackhi_epi64(quant, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
store_tran_low(qcoeff0, qcoeff_ptr + n_coeffs);
store_tran_low(qcoeff1, qcoeff_ptr + n_coeffs + 8);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
dequant = _mm_unpackhi_epi64(dequant, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
store_tran_low(coeff0, dqcoeff_ptr + n_coeffs);
store_tran_low(coeff1, dqcoeff_ptr + n_coeffs + 8);
}
{
// Scan for eob
__m128i zero_coeff0, zero_coeff1;
__m128i nzero_coeff0, nzero_coeff1;
__m128i iscan0, iscan1;
__m128i eob1;
zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);
zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);
nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);
nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);
iscan0 = _mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs));
iscan1 = _mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs) + 1);
// Add one to convert from indices to counts
iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);
iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);
eob = _mm_and_si128(iscan0, nzero_coeff0);
eob1 = _mm_and_si128(iscan1, nzero_coeff1);
eob = _mm_max_epi16(eob, eob1);
}
n_coeffs += 8 * 2;
}
// AC only loop
index = 2;
thr = _mm_srai_epi16(dequant, 1);
while (n_coeffs < 0) {
__m128i coeff0, coeff1;
{
__m128i coeff0_sign, coeff1_sign;
__m128i qcoeff0, qcoeff1;
__m128i qtmp0, qtmp1;
assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);
coeff0 = *in[index];
coeff1 = *in[index + 1];
// Poor man's sign extract
coeff0_sign = _mm_srai_epi16(coeff0, 15);
coeff1_sign = _mm_srai_epi16(coeff1, 15);
qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);
qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) |
_mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));
if (nzflag) {
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
store_tran_low(qcoeff0, qcoeff_ptr + n_coeffs);
store_tran_low(qcoeff1, qcoeff_ptr + n_coeffs + 8);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
store_tran_low(coeff0, dqcoeff_ptr + n_coeffs);
store_tran_low(coeff1, dqcoeff_ptr + n_coeffs + 8);
} else {
// Maybe a more efficient way to store 0?
store_zero_tran_low(qcoeff_ptr + n_coeffs);
store_zero_tran_low(qcoeff_ptr + n_coeffs + 8);
store_zero_tran_low(dqcoeff_ptr + n_coeffs);
store_zero_tran_low(dqcoeff_ptr + n_coeffs + 8);
}
}
if (nzflag) {
// Scan for eob
__m128i zero_coeff0, zero_coeff1;
__m128i nzero_coeff0, nzero_coeff1;
__m128i iscan0, iscan1;
__m128i eob0, eob1;
zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);
zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);
nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);
nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);
iscan0 = _mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs));
iscan1 = _mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs) + 1);
// Add one to convert from indices to counts
iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);
iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);
eob0 = _mm_and_si128(iscan0, nzero_coeff0);
eob1 = _mm_and_si128(iscan1, nzero_coeff1);
eob0 = _mm_max_epi16(eob0, eob1);
eob = _mm_max_epi16(eob, eob0);
}
n_coeffs += 8 * 2;
index += 2;
}
// Accumulate EOB
{
__m128i eob_shuffled;
eob_shuffled = _mm_shuffle_epi32(eob, 0xe);
eob = _mm_max_epi16(eob, eob_shuffled);
eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);
eob = _mm_max_epi16(eob, eob_shuffled);
eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);
eob = _mm_max_epi16(eob, eob_shuffled);
*eob_ptr = _mm_extract_epi16(eob, 1);
}
} else {
do {
store_zero_tran_low(dqcoeff_ptr + n_coeffs);
store_zero_tran_low(dqcoeff_ptr + n_coeffs + 8);
store_zero_tran_low(qcoeff_ptr + n_coeffs);
store_zero_tran_low(qcoeff_ptr + n_coeffs + 8);
n_coeffs += 8 * 2;
} while (n_coeffs < 0);
*eob_ptr = 0;
}
}
