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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/av1/encoder/x86/av1_quantize_avx2.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/x86/av1_quantize_avx2.c b/third_party/aom/av1/encoder/x86/av1_quantize_avx2.c new file mode 100644 index 0000000000..75c5172f85 --- /dev/null +++ b/third_party/aom/av1/encoder/x86/av1_quantize_avx2.c @@ -0,0 +1,414 @@ +/* + * Copyright (c) 2017, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <immintrin.h> + +#include "config/av1_rtcd.h" + +#include "aom/aom_integer.h" +#include "aom_dsp/aom_dsp_common.h" + +static INLINE void write_zero(tran_low_t *qcoeff) { + const __m256i zero = _mm256_setzero_si256(); + _mm256_storeu_si256((__m256i *)qcoeff, zero); + _mm256_storeu_si256((__m256i *)qcoeff + 1, zero); +} + +static INLINE void init_one_qp(const __m128i *p, __m256i *qp) { + const __m128i ac = _mm_unpackhi_epi64(*p, *p); + *qp = _mm256_insertf128_si256(_mm256_castsi128_si256(*p), ac, 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 *thr, __m256i *qp) { + __m128i round = _mm_loadu_si128((const __m128i *)round_ptr); + const __m128i quant = _mm_loadu_si128((const __m128i *)quant_ptr); + const __m128i dequant = _mm_loadu_si128((const __m128i *)dequant_ptr); + + if (log_scale > 0) { + const __m128i rnd = _mm_set1_epi16((int16_t)1 << (log_scale - 1)); + round = _mm_add_epi16(round, rnd); + round = _mm_srai_epi16(round, log_scale); + } + + init_one_qp(&round, &qp[0]); + init_one_qp(&quant, &qp[1]); + + if (log_scale == 1) { + qp[1] = _mm256_slli_epi16(qp[1], log_scale); + } + + init_one_qp(&dequant, &qp[2]); + *thr = _mm256_srai_epi16(qp[2], 1 + log_scale); + // Subtracting 1 here eliminates a _mm256_cmpeq_epi16() instruction when + // calculating the zbin mask. + *thr = _mm256_sub_epi16(*thr, _mm256_set1_epi16(1)); +} + +static INLINE void update_qp(__m256i *thr, __m256i *qp) { + qp[0] = _mm256_permute2x128_si256(qp[0], qp[0], 0x11); + qp[1] = _mm256_permute2x128_si256(qp[1], qp[1], 0x11); + qp[2] = _mm256_permute2x128_si256(qp[2], qp[2], 0x11); + *thr = _mm256_permute2x128_si256(*thr, *thr, 0x11); +} + +static INLINE __m256i load_coefficients_avx2(const tran_low_t *coeff_ptr) { + const __m256i coeff1 = _mm256_load_si256((__m256i *)coeff_ptr); + const __m256i coeff2 = _mm256_load_si256((__m256i *)(coeff_ptr + 8)); + return _mm256_packs_epi32(coeff1, coeff2); +} + +static INLINE void store_coefficients_avx2(__m256i coeff_vals, + tran_low_t *coeff_ptr) { + __m256i coeff_sign = _mm256_srai_epi16(coeff_vals, 15); + __m256i coeff_vals_lo = _mm256_unpacklo_epi16(coeff_vals, coeff_sign); + __m256i coeff_vals_hi = _mm256_unpackhi_epi16(coeff_vals, coeff_sign); + _mm256_store_si256((__m256i *)coeff_ptr, coeff_vals_lo); + _mm256_store_si256((__m256i *)(coeff_ptr + 8), coeff_vals_hi); +} + +static INLINE uint16_t quant_gather_eob(__m256i eob) { + const __m128i eob_lo = _mm256_castsi256_si128(eob); + const __m128i eob_hi = _mm256_extractf128_si256(eob, 1); + __m128i eob_s = _mm_max_epi16(eob_lo, eob_hi); + eob_s = _mm_subs_epu16(_mm_set1_epi16(INT16_MAX), eob_s); + eob_s = _mm_minpos_epu16(eob_s); + return INT16_MAX - _mm_extract_epi16(eob_s, 0); +} + +static INLINE int16_t accumulate_eob256(__m256i eob256) { + const __m128i eob_lo = _mm256_castsi256_si128(eob256); + const __m128i eob_hi = _mm256_extractf128_si256(eob256, 1); + __m128i eob = _mm_max_epi16(eob_lo, eob_hi); + __m128i 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); + return _mm_extract_epi16(eob, 1); +} + +static AOM_FORCE_INLINE void quantize_lp_16_first( + const int16_t *coeff_ptr, const int16_t *iscan_ptr, int16_t *qcoeff_ptr, + int16_t *dqcoeff_ptr, __m256i *round256, __m256i *quant256, + __m256i *dequant256, __m256i *eob) { + const __m256i coeff = _mm256_loadu_si256((const __m256i *)coeff_ptr); + const __m256i abs_coeff = _mm256_abs_epi16(coeff); + const __m256i tmp_rnd = _mm256_adds_epi16(abs_coeff, *round256); + const __m256i abs_qcoeff = _mm256_mulhi_epi16(tmp_rnd, *quant256); + const __m256i qcoeff = _mm256_sign_epi16(abs_qcoeff, coeff); + const __m256i dqcoeff = _mm256_mullo_epi16(qcoeff, *dequant256); + const __m256i nz_mask = + _mm256_cmpgt_epi16(abs_qcoeff, _mm256_setzero_si256()); + + _mm256_storeu_si256((__m256i *)qcoeff_ptr, qcoeff); + _mm256_storeu_si256((__m256i *)dqcoeff_ptr, dqcoeff); + + const __m256i iscan = _mm256_loadu_si256((const __m256i *)iscan_ptr); + const __m256i iscan_plus1 = _mm256_sub_epi16(iscan, nz_mask); + const __m256i nz_iscan = _mm256_and_si256(iscan_plus1, nz_mask); + *eob = _mm256_max_epi16(*eob, nz_iscan); +} + +static AOM_FORCE_INLINE void quantize_lp_16( + const int16_t *coeff_ptr, intptr_t n_coeffs, const int16_t *iscan_ptr, + int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr, __m256i *round256, + __m256i *quant256, __m256i *dequant256, __m256i *eob) { + const __m256i coeff = + _mm256_loadu_si256((const __m256i *)(coeff_ptr + n_coeffs)); + const __m256i abs_coeff = _mm256_abs_epi16(coeff); + const __m256i tmp_rnd = _mm256_adds_epi16(abs_coeff, *round256); + const __m256i abs_qcoeff = _mm256_mulhi_epi16(tmp_rnd, *quant256); + const __m256i qcoeff = _mm256_sign_epi16(abs_qcoeff, coeff); + const __m256i dqcoeff = _mm256_mullo_epi16(qcoeff, *dequant256); + const __m256i nz_mask = + _mm256_cmpgt_epi16(abs_qcoeff, _mm256_setzero_si256()); + + _mm256_storeu_si256((__m256i *)(qcoeff_ptr + n_coeffs), qcoeff); + _mm256_storeu_si256((__m256i *)(dqcoeff_ptr + n_coeffs), dqcoeff); + + const __m256i iscan = + _mm256_loadu_si256((const __m256i *)(iscan_ptr + n_coeffs)); + const __m256i iscan_plus1 = _mm256_sub_epi16(iscan, nz_mask); + const __m256i nz_iscan = _mm256_and_si256(iscan_plus1, nz_mask); + *eob = _mm256_max_epi16(*eob, nz_iscan); +} + +void av1_quantize_lp_avx2(const int16_t *coeff_ptr, intptr_t n_coeffs, + const int16_t *round_ptr, const int16_t *quant_ptr, + int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + (void)scan; + __m256i eob256 = _mm256_setzero_si256(); + + // Setup global values. + __m256i round256 = + _mm256_castsi128_si256(_mm_load_si128((const __m128i *)round_ptr)); + __m256i quant256 = + _mm256_castsi128_si256(_mm_load_si128((const __m128i *)quant_ptr)); + __m256i dequant256 = + _mm256_castsi128_si256(_mm_load_si128((const __m128i *)dequant_ptr)); + + // Populate upper AC values. + round256 = _mm256_permute4x64_epi64(round256, 0x54); + quant256 = _mm256_permute4x64_epi64(quant256, 0x54); + dequant256 = _mm256_permute4x64_epi64(dequant256, 0x54); + + // Process DC and the first 15 AC coeffs. + quantize_lp_16_first(coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &round256, + &quant256, &dequant256, &eob256); + + if (n_coeffs > 16) { + // Overwrite the DC constants with AC constants + dequant256 = _mm256_permute2x128_si256(dequant256, dequant256, 0x31); + quant256 = _mm256_permute2x128_si256(quant256, quant256, 0x31); + round256 = _mm256_permute2x128_si256(round256, round256, 0x31); + + // AC only loop. + for (int idx = 16; idx < n_coeffs; idx += 16) { + quantize_lp_16(coeff_ptr, idx, iscan, qcoeff_ptr, dqcoeff_ptr, &round256, + &quant256, &dequant256, &eob256); + } + } + + *eob_ptr = accumulate_eob256(eob256); +} + +static AOM_FORCE_INLINE __m256i get_max_lane_eob(const int16_t *iscan, + __m256i v_eobmax, + __m256i v_mask) { + const __m256i v_iscan = _mm256_loadu_si256((const __m256i *)iscan); + const __m256i v_iscan_perm = _mm256_permute4x64_epi64(v_iscan, 0xD8); + const __m256i v_iscan_plus1 = _mm256_sub_epi16(v_iscan_perm, v_mask); + const __m256i v_nz_iscan = _mm256_and_si256(v_iscan_plus1, v_mask); + return _mm256_max_epi16(v_eobmax, v_nz_iscan); +} + +static AOM_FORCE_INLINE void quantize_fp_16( + const __m256i *thr, const __m256i *qp, const tran_low_t *coeff_ptr, + const int16_t *iscan_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + __m256i *eob) { + const __m256i coeff = load_coefficients_avx2(coeff_ptr); + const __m256i abs_coeff = _mm256_abs_epi16(coeff); + const __m256i mask = _mm256_cmpgt_epi16(abs_coeff, *thr); + const int nzflag = _mm256_movemask_epi8(mask); + + if (nzflag) { + const __m256i tmp_rnd = _mm256_adds_epi16(abs_coeff, qp[0]); + const __m256i abs_q = _mm256_mulhi_epi16(tmp_rnd, qp[1]); + const __m256i q = _mm256_sign_epi16(abs_q, coeff); + const __m256i dq = _mm256_mullo_epi16(q, qp[2]); + const __m256i nz_mask = _mm256_cmpgt_epi16(abs_q, _mm256_setzero_si256()); + + store_coefficients_avx2(q, qcoeff_ptr); + store_coefficients_avx2(dq, dqcoeff_ptr); + + *eob = get_max_lane_eob(iscan_ptr, *eob, nz_mask); + } else { + write_zero(qcoeff_ptr); + write_zero(dqcoeff_ptr); + } +} + +void av1_quantize_fp_avx2(const tran_low_t *coeff_ptr, intptr_t n_coeffs, + 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) { + (void)scan_ptr; + (void)zbin_ptr; + (void)quant_shift_ptr; + + const int log_scale = 0; + const int step = 16; + __m256i qp[3], thr; + __m256i eob = _mm256_setzero_si256(); + + init_qp(round_ptr, quant_ptr, dequant_ptr, log_scale, &thr, qp); + + quantize_fp_16(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + + update_qp(&thr, qp); + + while (n_coeffs > 0) { + quantize_fp_16(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, + &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + } + *eob_ptr = quant_gather_eob(eob); +} + +static AOM_FORCE_INLINE void quantize_fp_32x32( + const __m256i *thr, const __m256i *qp, const tran_low_t *coeff_ptr, + const int16_t *iscan_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + __m256i *eob) { + const __m256i coeff = load_coefficients_avx2(coeff_ptr); + const __m256i abs_coeff = _mm256_abs_epi16(coeff); + const __m256i mask = _mm256_cmpgt_epi16(abs_coeff, *thr); + const int nzflag = _mm256_movemask_epi8(mask); + + if (nzflag) { + const __m256i tmp_rnd = _mm256_adds_epi16(abs_coeff, qp[0]); + const __m256i abs_q = _mm256_mulhi_epu16(tmp_rnd, qp[1]); + const __m256i q = _mm256_sign_epi16(abs_q, coeff); + const __m256i abs_dq = + _mm256_srli_epi16(_mm256_mullo_epi16(abs_q, qp[2]), 1); + const __m256i nz_mask = _mm256_cmpgt_epi16(abs_q, _mm256_setzero_si256()); + const __m256i dq = _mm256_sign_epi16(abs_dq, coeff); + + store_coefficients_avx2(q, qcoeff_ptr); + store_coefficients_avx2(dq, dqcoeff_ptr); + + *eob = get_max_lane_eob(iscan_ptr, *eob, nz_mask); + } else { + write_zero(qcoeff_ptr); + write_zero(dqcoeff_ptr); + } +} + +void av1_quantize_fp_32x32_avx2( + const tran_low_t *coeff_ptr, intptr_t n_coeffs, 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) { + (void)scan_ptr; + (void)zbin_ptr; + (void)quant_shift_ptr; + + const int log_scale = 1; + const unsigned int step = 16; + __m256i qp[3], thr; + __m256i eob = _mm256_setzero_si256(); + + init_qp(round_ptr, quant_ptr, dequant_ptr, log_scale, &thr, qp); + + quantize_fp_32x32(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, + &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + + update_qp(&thr, qp); + + while (n_coeffs > 0) { + quantize_fp_32x32(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, + &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + } + *eob_ptr = quant_gather_eob(eob); +} + +static INLINE void quantize_fp_64x64(const __m256i *thr, const __m256i *qp, + const tran_low_t *coeff_ptr, + const int16_t *iscan_ptr, + tran_low_t *qcoeff_ptr, + tran_low_t *dqcoeff_ptr, __m256i *eob) { + const __m256i coeff = load_coefficients_avx2(coeff_ptr); + const __m256i abs_coeff = _mm256_abs_epi16(coeff); + const __m256i mask = _mm256_cmpgt_epi16(abs_coeff, *thr); + const int nzflag = _mm256_movemask_epi8(mask); + + if (nzflag) { + const __m256i tmp_rnd = + _mm256_and_si256(_mm256_adds_epi16(abs_coeff, qp[0]), mask); + const __m256i qh = _mm256_slli_epi16(_mm256_mulhi_epi16(tmp_rnd, qp[1]), 2); + const __m256i ql = + _mm256_srli_epi16(_mm256_mullo_epi16(tmp_rnd, qp[1]), 14); + const __m256i abs_q = _mm256_or_si256(qh, ql); + const __m256i dqh = _mm256_slli_epi16(_mm256_mulhi_epi16(abs_q, qp[2]), 14); + const __m256i dql = _mm256_srli_epi16(_mm256_mullo_epi16(abs_q, qp[2]), 2); + const __m256i abs_dq = _mm256_or_si256(dqh, dql); + const __m256i q = _mm256_sign_epi16(abs_q, coeff); + const __m256i dq = _mm256_sign_epi16(abs_dq, coeff); + // Check the signed q/dq value here instead of the absolute value. When + // dequant equals 4, the dequant threshold (*thr) becomes 0 after being + // scaled down by (1 + log_scale). See init_qp(). When *thr is 0 and the + // abs_coeff is 0, the nzflag will be set. As a result, the eob will be + // incorrectly calculated. The psign instruction corrects the error by + // zeroing out q/dq if coeff is zero. + const __m256i z_mask = _mm256_cmpeq_epi16(dq, _mm256_setzero_si256()); + const __m256i nz_mask = _mm256_cmpeq_epi16(z_mask, _mm256_setzero_si256()); + + store_coefficients_avx2(q, qcoeff_ptr); + store_coefficients_avx2(dq, dqcoeff_ptr); + + *eob = get_max_lane_eob(iscan_ptr, *eob, nz_mask); + } else { + write_zero(qcoeff_ptr); + write_zero(dqcoeff_ptr); + } +} + +void av1_quantize_fp_64x64_avx2( + const tran_low_t *coeff_ptr, intptr_t n_coeffs, 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) { + (void)scan_ptr; + (void)zbin_ptr; + (void)quant_shift_ptr; + + const int log_scale = 2; + const unsigned int step = 16; + __m256i qp[3], thr; + __m256i eob = _mm256_setzero_si256(); + + init_qp(round_ptr, quant_ptr, dequant_ptr, log_scale, &thr, qp); + + quantize_fp_64x64(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, + &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + + update_qp(&thr, qp); + + while (n_coeffs > 0) { + quantize_fp_64x64(&thr, qp, coeff_ptr, iscan_ptr, qcoeff_ptr, dqcoeff_ptr, + &eob); + + coeff_ptr += step; + qcoeff_ptr += step; + dqcoeff_ptr += step; + iscan_ptr += step; + n_coeffs -= step; + } + *eob_ptr = quant_gather_eob(eob); +} |