ref: a0fa2841b87a357b85fc960837f49d0b0c37af0f
dir: /vpx_dsp/x86/highbd_idct4x4_add_sse2.c/
/* * Copyright (c) 2015 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include <emmintrin.h> // SSE2 #include "./vpx_dsp_rtcd.h" #include "vpx_dsp/x86/highbd_inv_txfm_sse2.h" #include "vpx_dsp/x86/inv_txfm_sse2.h" #include "vpx_dsp/x86/transpose_sse2.h" static INLINE __m128i dct_const_round_shift_4_sse2(const __m128i in0, const __m128i in1) { const __m128i t0 = _mm_unpacklo_epi32(in0, in1); // 0, 1 const __m128i t1 = _mm_unpackhi_epi32(in0, in1); // 2, 3 const __m128i t2 = _mm_unpacklo_epi64(t0, t1); // 0, 1, 2, 3 return dct_const_round_shift_sse2(t2); } static INLINE void highbd_idct4_small_sse2(__m128i *const io) { const __m128i cospi_p16_p16 = _mm_setr_epi32(cospi_16_64, 0, cospi_16_64, 0); const __m128i cospi_p08_p08 = _mm_setr_epi32(cospi_8_64, 0, cospi_8_64, 0); const __m128i cospi_p24_p24 = _mm_setr_epi32(cospi_24_64, 0, cospi_24_64, 0); __m128i temp1[4], temp2[4], step[4]; transpose_32bit_4x4(io, io); // Note: There is no 32-bit signed multiply SIMD instruction in SSE2. // _mm_mul_epu32() is used which can only guarantee the lower 32-bit // (signed) result is meaningful, which is enough in this function. // stage 1 temp1[0] = _mm_add_epi32(io[0], io[2]); // input[0] + input[2] temp2[0] = _mm_sub_epi32(io[0], io[2]); // input[0] - input[2] temp1[1] = _mm_srli_si128(temp1[0], 4); // 1, 3 temp2[1] = _mm_srli_si128(temp2[0], 4); // 1, 3 temp1[0] = _mm_mul_epu32(temp1[0], cospi_p16_p16); // ([0] + [2])*cospi_16_64 temp1[1] = _mm_mul_epu32(temp1[1], cospi_p16_p16); // ([0] + [2])*cospi_16_64 temp2[0] = _mm_mul_epu32(temp2[0], cospi_p16_p16); // ([0] - [2])*cospi_16_64 temp2[1] = _mm_mul_epu32(temp2[1], cospi_p16_p16); // ([0] - [2])*cospi_16_64 step[0] = dct_const_round_shift_4_sse2(temp1[0], temp1[1]); step[1] = dct_const_round_shift_4_sse2(temp2[0], temp2[1]); temp1[3] = _mm_srli_si128(io[1], 4); temp2[3] = _mm_srli_si128(io[3], 4); temp1[0] = _mm_mul_epu32(io[1], cospi_p24_p24); // input[1] * cospi_24_64 temp1[1] = _mm_mul_epu32(temp1[3], cospi_p24_p24); // input[1] * cospi_24_64 temp2[0] = _mm_mul_epu32(io[1], cospi_p08_p08); // input[1] * cospi_8_64 temp2[1] = _mm_mul_epu32(temp1[3], cospi_p08_p08); // input[1] * cospi_8_64 temp1[2] = _mm_mul_epu32(io[3], cospi_p08_p08); // input[3] * cospi_8_64 temp1[3] = _mm_mul_epu32(temp2[3], cospi_p08_p08); // input[3] * cospi_8_64 temp2[2] = _mm_mul_epu32(io[3], cospi_p24_p24); // input[3] * cospi_24_64 temp2[3] = _mm_mul_epu32(temp2[3], cospi_p24_p24); // input[3] * cospi_24_64 temp1[0] = _mm_sub_epi64(temp1[0], temp1[2]); // [1]*cospi_24 - [3]*cospi_8 temp1[1] = _mm_sub_epi64(temp1[1], temp1[3]); // [1]*cospi_24 - [3]*cospi_8 temp2[0] = _mm_add_epi64(temp2[0], temp2[2]); // [1]*cospi_8 + [3]*cospi_24 temp2[1] = _mm_add_epi64(temp2[1], temp2[3]); // [1]*cospi_8 + [3]*cospi_24 step[2] = dct_const_round_shift_4_sse2(temp1[0], temp1[1]); step[3] = dct_const_round_shift_4_sse2(temp2[0], temp2[1]); // stage 2 io[0] = _mm_add_epi32(step[0], step[3]); // step[0] + step[3] io[1] = _mm_add_epi32(step[1], step[2]); // step[1] + step[2] io[2] = _mm_sub_epi32(step[1], step[2]); // step[1] - step[2] io[3] = _mm_sub_epi32(step[0], step[3]); // step[0] - step[3] } static INLINE void highbd_idct4_large_sse2(__m128i *const io) { __m128i step[4]; transpose_32bit_4x4(io, io); // stage 1 highbd_butterfly_cospi16_sse2(io[0], io[2], &step[0], &step[1]); highbd_butterfly_sse2(io[1], io[3], cospi_24_64, cospi_8_64, &step[2], &step[3]); // stage 2 io[0] = _mm_add_epi32(step[0], step[3]); // step[0] + step[3] io[1] = _mm_add_epi32(step[1], step[2]); // step[1] + step[2] io[2] = _mm_sub_epi32(step[1], step[2]); // step[1] - step[2] io[3] = _mm_sub_epi32(step[0], step[3]); // step[0] - step[3] } void vpx_highbd_idct4x4_16_add_sse2(const tran_low_t *input, uint16_t *dest, int stride, int bd) { int16_t max = 0, min = 0; __m128i io[4], io_short[2]; io[0] = _mm_load_si128((const __m128i *)(input + 0)); io[1] = _mm_load_si128((const __m128i *)(input + 4)); io[2] = _mm_load_si128((const __m128i *)(input + 8)); io[3] = _mm_load_si128((const __m128i *)(input + 12)); io_short[0] = _mm_packs_epi32(io[0], io[1]); io_short[1] = _mm_packs_epi32(io[2], io[3]); if (bd != 8) { __m128i max_input, min_input; max_input = _mm_max_epi16(io_short[0], io_short[1]); min_input = _mm_min_epi16(io_short[0], io_short[1]); max_input = _mm_max_epi16(max_input, _mm_srli_si128(max_input, 8)); min_input = _mm_min_epi16(min_input, _mm_srli_si128(min_input, 8)); max_input = _mm_max_epi16(max_input, _mm_srli_si128(max_input, 4)); min_input = _mm_min_epi16(min_input, _mm_srli_si128(min_input, 4)); max_input = _mm_max_epi16(max_input, _mm_srli_si128(max_input, 2)); min_input = _mm_min_epi16(min_input, _mm_srli_si128(min_input, 2)); max = (int16_t)_mm_extract_epi16(max_input, 0); min = (int16_t)_mm_extract_epi16(min_input, 0); } if (bd == 8 || (max < 4096 && min >= -4096)) { idct4_sse2(io_short); idct4_sse2(io_short); io_short[0] = _mm_add_epi16(io_short[0], _mm_set1_epi16(8)); io_short[1] = _mm_add_epi16(io_short[1], _mm_set1_epi16(8)); io[0] = _mm_srai_epi16(io_short[0], 4); io[1] = _mm_srai_epi16(io_short[1], 4); } else { if (max < 32767 && min > -32768) { highbd_idct4_small_sse2(io); highbd_idct4_small_sse2(io); } else { highbd_idct4_large_sse2(io); highbd_idct4_large_sse2(io); } io[0] = wraplow_16bit_shift4(io[0], io[1], _mm_set1_epi32(8)); io[1] = wraplow_16bit_shift4(io[2], io[3], _mm_set1_epi32(8)); } recon_and_store_4x4(io, dest, stride, bd); } void vpx_highbd_idct4x4_1_add_sse2(const tran_low_t *input, uint16_t *dest, int stride, int bd) { int a1, i; tran_low_t out; __m128i dc, d; out = HIGHBD_WRAPLOW( dct_const_round_shift(input[0] * (tran_high_t)cospi_16_64), bd); out = HIGHBD_WRAPLOW(dct_const_round_shift(out * (tran_high_t)cospi_16_64), bd); a1 = ROUND_POWER_OF_TWO(out, 4); dc = _mm_set1_epi16(a1); for (i = 0; i < 4; ++i) { d = _mm_loadl_epi64((const __m128i *)dest); d = add_clamp(d, dc, bd); _mm_storel_epi64((__m128i *)dest, d); dest += stride; } }