1 /* 2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include <arm_neon.h> 12 13 #include "./vpx_config.h" 14 #include "./vpx_dsp_rtcd.h" 15 #include "vpx_dsp/arm/idct_neon.h" 16 #include "vpx_dsp/arm/mem_neon.h" 17 #include "vpx_dsp/arm/transpose_neon.h" 18 #include "vpx_dsp/txfm_common.h" 19 20 static INLINE void add8x8(int16x8_t a0, int16x8_t a1, int16x8_t a2, 21 int16x8_t a3, int16x8_t a4, int16x8_t a5, 22 int16x8_t a6, int16x8_t a7, uint8_t *dest, 23 const int stride) { 24 const uint8_t *dst = dest; 25 uint8x8_t d0, d1, d2, d3, d4, d5, d6, d7; 26 uint16x8_t d0_u16, d1_u16, d2_u16, d3_u16, d4_u16, d5_u16, d6_u16, d7_u16; 27 28 a0 = vrshrq_n_s16(a0, 5); 29 a1 = vrshrq_n_s16(a1, 5); 30 a2 = vrshrq_n_s16(a2, 5); 31 a3 = vrshrq_n_s16(a3, 5); 32 a4 = vrshrq_n_s16(a4, 5); 33 a5 = vrshrq_n_s16(a5, 5); 34 a6 = vrshrq_n_s16(a6, 5); 35 a7 = vrshrq_n_s16(a7, 5); 36 37 d0 = vld1_u8(dst); 38 dst += stride; 39 d1 = vld1_u8(dst); 40 dst += stride; 41 d2 = vld1_u8(dst); 42 dst += stride; 43 d3 = vld1_u8(dst); 44 dst += stride; 45 d4 = vld1_u8(dst); 46 dst += stride; 47 d5 = vld1_u8(dst); 48 dst += stride; 49 d6 = vld1_u8(dst); 50 dst += stride; 51 d7 = vld1_u8(dst); 52 53 d0_u16 = vaddw_u8(vreinterpretq_u16_s16(a0), d0); 54 d1_u16 = vaddw_u8(vreinterpretq_u16_s16(a1), d1); 55 d2_u16 = vaddw_u8(vreinterpretq_u16_s16(a2), d2); 56 d3_u16 = vaddw_u8(vreinterpretq_u16_s16(a3), d3); 57 d4_u16 = vaddw_u8(vreinterpretq_u16_s16(a4), d4); 58 d5_u16 = vaddw_u8(vreinterpretq_u16_s16(a5), d5); 59 d6_u16 = vaddw_u8(vreinterpretq_u16_s16(a6), d6); 60 d7_u16 = vaddw_u8(vreinterpretq_u16_s16(a7), d7); 61 62 d0 = vqmovun_s16(vreinterpretq_s16_u16(d0_u16)); 63 d1 = vqmovun_s16(vreinterpretq_s16_u16(d1_u16)); 64 d2 = vqmovun_s16(vreinterpretq_s16_u16(d2_u16)); 65 d3 = vqmovun_s16(vreinterpretq_s16_u16(d3_u16)); 66 d4 = vqmovun_s16(vreinterpretq_s16_u16(d4_u16)); 67 d5 = vqmovun_s16(vreinterpretq_s16_u16(d5_u16)); 68 d6 = vqmovun_s16(vreinterpretq_s16_u16(d6_u16)); 69 d7 = vqmovun_s16(vreinterpretq_s16_u16(d7_u16)); 70 71 vst1_u8(dest, d0); 72 dest += stride; 73 vst1_u8(dest, d1); 74 dest += stride; 75 vst1_u8(dest, d2); 76 dest += stride; 77 vst1_u8(dest, d3); 78 dest += stride; 79 vst1_u8(dest, d4); 80 dest += stride; 81 vst1_u8(dest, d5); 82 dest += stride; 83 vst1_u8(dest, d6); 84 dest += stride; 85 vst1_u8(dest, d7); 86 } 87 88 void vpx_idct8x8_64_add_neon(const tran_low_t *input, uint8_t *dest, 89 int stride) { 90 const int16x8_t cospis = vld1q_s16(kCospi); 91 const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24 92 const int16x4_t cospis1 = vget_high_s16(cospis); // cospi 4, 12, 20, 28 93 int16x8_t a0 = load_tran_low_to_s16q(input); 94 int16x8_t a1 = load_tran_low_to_s16q(input + 8); 95 int16x8_t a2 = load_tran_low_to_s16q(input + 16); 96 int16x8_t a3 = load_tran_low_to_s16q(input + 24); 97 int16x8_t a4 = load_tran_low_to_s16q(input + 32); 98 int16x8_t a5 = load_tran_low_to_s16q(input + 40); 99 int16x8_t a6 = load_tran_low_to_s16q(input + 48); 100 int16x8_t a7 = load_tran_low_to_s16q(input + 56); 101 102 idct8x8_64_1d_bd8(cospis0, cospis1, &a0, &a1, &a2, &a3, &a4, &a5, &a6, &a7); 103 idct8x8_64_1d_bd8(cospis0, cospis1, &a0, &a1, &a2, &a3, &a4, &a5, &a6, &a7); 104 add8x8(a0, a1, a2, a3, a4, a5, a6, a7, dest, stride); 105 } 106 107 void vpx_idct8x8_12_add_neon(const tran_low_t *input, uint8_t *dest, 108 int stride) { 109 const int16x8_t cospis = vld1q_s16(kCospi); 110 const int16x8_t cospisd = vaddq_s16(cospis, cospis); 111 const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24 112 const int16x4_t cospisd0 = vget_low_s16(cospisd); // doubled 0, 8, 16, 24 113 const int16x4_t cospisd1 = vget_high_s16(cospisd); // doubled 4, 12, 20, 28 114 int16x4_t a0, a1, a2, a3, a4, a5, a6, a7; 115 int16x8_t b0, b1, b2, b3, b4, b5, b6, b7; 116 117 a0 = load_tran_low_to_s16d(input); 118 a1 = load_tran_low_to_s16d(input + 8); 119 a2 = load_tran_low_to_s16d(input + 16); 120 a3 = load_tran_low_to_s16d(input + 24); 121 122 idct8x8_12_pass1_bd8(cospis0, cospisd0, cospisd1, &a0, &a1, &a2, &a3, &a4, 123 &a5, &a6, &a7); 124 idct8x8_12_pass2_bd8(cospis0, cospisd0, cospisd1, a0, a1, a2, a3, a4, a5, a6, 125 a7, &b0, &b1, &b2, &b3, &b4, &b5, &b6, &b7); 126 add8x8(b0, b1, b2, b3, b4, b5, b6, b7, dest, stride); 127 } 128
