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 #include "vpx_ports/arm.h" 13 14 #ifdef VPX_INCOMPATIBLE_GCC 15 #include "./vp8_rtcd.h" 16 void vp8_short_walsh4x4_neon(int16_t *input, int16_t *output, int pitch) { 17 vp8_short_walsh4x4_c(input, output, pitch); 18 } 19 #else 20 void vp8_short_walsh4x4_neon(int16_t *input, int16_t *output, int pitch) { 21 uint16x4_t d16u16; 22 int16x8_t q0s16, q1s16; 23 int16x4_t dEmptys16, d0s16, d1s16, d2s16, d3s16, d4s16, d5s16, d6s16, d7s16; 24 int32x4_t qEmptys32, q0s32, q1s32, q2s32, q3s32, q8s32; 25 int32x4_t q9s32, q10s32, q11s32, q15s32; 26 uint32x4_t q8u32, q9u32, q10u32, q11u32; 27 int16x4x2_t v2tmp0, v2tmp1; 28 int32x2x2_t v2tmp2, v2tmp3; 29 30 dEmptys16 = vdup_n_s16(0); 31 qEmptys32 = vdupq_n_s32(0); 32 q15s32 = vdupq_n_s32(3); 33 34 d0s16 = vld1_s16(input); 35 input += pitch / 2; 36 d1s16 = vld1_s16(input); 37 input += pitch / 2; 38 d2s16 = vld1_s16(input); 39 input += pitch / 2; 40 d3s16 = vld1_s16(input); 41 42 v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d0s16), vreinterpret_s32_s16(d2s16)); 43 v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d1s16), vreinterpret_s32_s16(d3s16)); 44 v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]), // d0 45 vreinterpret_s16_s32(v2tmp3.val[0])); // d1 46 v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]), // d2 47 vreinterpret_s16_s32(v2tmp3.val[1])); // d3 48 49 d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[0]); 50 d5s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[1]); 51 d6s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[1]); 52 d7s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[0]); 53 54 d4s16 = vshl_n_s16(d4s16, 2); 55 d5s16 = vshl_n_s16(d5s16, 2); 56 d6s16 = vshl_n_s16(d6s16, 2); 57 d7s16 = vshl_n_s16(d7s16, 2); 58 59 d16u16 = vceq_s16(d4s16, dEmptys16); 60 d16u16 = vmvn_u16(d16u16); 61 62 d0s16 = vadd_s16(d4s16, d5s16); 63 d3s16 = vsub_s16(d4s16, d5s16); 64 d1s16 = vadd_s16(d7s16, d6s16); 65 d2s16 = vsub_s16(d7s16, d6s16); 66 67 d0s16 = vsub_s16(d0s16, vreinterpret_s16_u16(d16u16)); 68 69 // Second for-loop 70 v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d1s16), vreinterpret_s32_s16(d3s16)); 71 v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d0s16), vreinterpret_s32_s16(d2s16)); 72 v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[1]), // d2 73 vreinterpret_s16_s32(v2tmp2.val[1])); // d3 74 v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[0]), // d0 75 vreinterpret_s16_s32(v2tmp2.val[0])); // d1 76 77 q8s32 = vaddl_s16(v2tmp1.val[0], v2tmp0.val[0]); 78 q9s32 = vaddl_s16(v2tmp1.val[1], v2tmp0.val[1]); 79 q10s32 = vsubl_s16(v2tmp1.val[1], v2tmp0.val[1]); 80 q11s32 = vsubl_s16(v2tmp1.val[0], v2tmp0.val[0]); 81 82 q0s32 = vaddq_s32(q8s32, q9s32); 83 q1s32 = vaddq_s32(q11s32, q10s32); 84 q2s32 = vsubq_s32(q11s32, q10s32); 85 q3s32 = vsubq_s32(q8s32, q9s32); 86 87 q8u32 = vcltq_s32(q0s32, qEmptys32); 88 q9u32 = vcltq_s32(q1s32, qEmptys32); 89 q10u32 = vcltq_s32(q2s32, qEmptys32); 90 q11u32 = vcltq_s32(q3s32, qEmptys32); 91 92 q8s32 = vreinterpretq_s32_u32(q8u32); 93 q9s32 = vreinterpretq_s32_u32(q9u32); 94 q10s32 = vreinterpretq_s32_u32(q10u32); 95 q11s32 = vreinterpretq_s32_u32(q11u32); 96 97 q0s32 = vsubq_s32(q0s32, q8s32); 98 q1s32 = vsubq_s32(q1s32, q9s32); 99 q2s32 = vsubq_s32(q2s32, q10s32); 100 q3s32 = vsubq_s32(q3s32, q11s32); 101 102 q8s32 = vaddq_s32(q0s32, q15s32); 103 q9s32 = vaddq_s32(q1s32, q15s32); 104 q10s32 = vaddq_s32(q2s32, q15s32); 105 q11s32 = vaddq_s32(q3s32, q15s32); 106 107 d0s16 = vshrn_n_s32(q8s32, 3); 108 d1s16 = vshrn_n_s32(q9s32, 3); 109 d2s16 = vshrn_n_s32(q10s32, 3); 110 d3s16 = vshrn_n_s32(q11s32, 3); 111 112 q0s16 = vcombine_s16(d0s16, d1s16); 113 q1s16 = vcombine_s16(d2s16, d3s16); 114 115 vst1q_s16(output, q0s16); 116 vst1q_s16(output + 8, q1s16); 117 return; 118 } 119 #endif // VPX_INCOMPATIBLE_GCC 120
