1 /* 2 * Copyright (c) 2013 The WebRTC 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 "webrtc/common_audio/signal_processing/include/signal_processing_library.h" 12 13 void WebRtcSpl_CrossCorrelation_mips(int32_t* cross_correlation, 14 const int16_t* seq1, 15 const int16_t* seq2, 16 size_t dim_seq, 17 size_t dim_cross_correlation, 18 int right_shifts, 19 int step_seq2) { 20 21 int32_t t0 = 0, t1 = 0, t2 = 0, t3 = 0, sum = 0; 22 int16_t *pseq2 = NULL; 23 int16_t *pseq1 = NULL; 24 int16_t *pseq1_0 = (int16_t*)&seq1[0]; 25 int16_t *pseq2_0 = (int16_t*)&seq2[0]; 26 int k = 0; 27 28 __asm __volatile ( 29 ".set push \n\t" 30 ".set noreorder \n\t" 31 "sll %[step_seq2], %[step_seq2], 1 \n\t" 32 "andi %[t0], %[dim_seq], 1 \n\t" 33 "bgtz %[t0], 3f \n\t" 34 " nop \n\t" 35 "1: \n\t" 36 "move %[pseq1], %[pseq1_0] \n\t" 37 "move %[pseq2], %[pseq2_0] \n\t" 38 "sra %[k], %[dim_seq], 1 \n\t" 39 "addiu %[dim_cc], %[dim_cc], -1 \n\t" 40 "xor %[sum], %[sum], %[sum] \n\t" 41 "2: \n\t" 42 "lh %[t0], 0(%[pseq1]) \n\t" 43 "lh %[t1], 0(%[pseq2]) \n\t" 44 "lh %[t2], 2(%[pseq1]) \n\t" 45 "lh %[t3], 2(%[pseq2]) \n\t" 46 "mul %[t0], %[t0], %[t1] \n\t" 47 "addiu %[k], %[k], -1 \n\t" 48 "mul %[t2], %[t2], %[t3] \n\t" 49 "addiu %[pseq1], %[pseq1], 4 \n\t" 50 "addiu %[pseq2], %[pseq2], 4 \n\t" 51 "srav %[t0], %[t0], %[right_shifts] \n\t" 52 "addu %[sum], %[sum], %[t0] \n\t" 53 "srav %[t2], %[t2], %[right_shifts] \n\t" 54 "bgtz %[k], 2b \n\t" 55 " addu %[sum], %[sum], %[t2] \n\t" 56 "addu %[pseq2_0], %[pseq2_0], %[step_seq2] \n\t" 57 "sw %[sum], 0(%[cc]) \n\t" 58 "bgtz %[dim_cc], 1b \n\t" 59 " addiu %[cc], %[cc], 4 \n\t" 60 "b 6f \n\t" 61 " nop \n\t" 62 "3: \n\t" 63 "move %[pseq1], %[pseq1_0] \n\t" 64 "move %[pseq2], %[pseq2_0] \n\t" 65 "sra %[k], %[dim_seq], 1 \n\t" 66 "addiu %[dim_cc], %[dim_cc], -1 \n\t" 67 "beqz %[k], 5f \n\t" 68 " xor %[sum], %[sum], %[sum] \n\t" 69 "4: \n\t" 70 "lh %[t0], 0(%[pseq1]) \n\t" 71 "lh %[t1], 0(%[pseq2]) \n\t" 72 "lh %[t2], 2(%[pseq1]) \n\t" 73 "lh %[t3], 2(%[pseq2]) \n\t" 74 "mul %[t0], %[t0], %[t1] \n\t" 75 "addiu %[k], %[k], -1 \n\t" 76 "mul %[t2], %[t2], %[t3] \n\t" 77 "addiu %[pseq1], %[pseq1], 4 \n\t" 78 "addiu %[pseq2], %[pseq2], 4 \n\t" 79 "srav %[t0], %[t0], %[right_shifts] \n\t" 80 "addu %[sum], %[sum], %[t0] \n\t" 81 "srav %[t2], %[t2], %[right_shifts] \n\t" 82 "bgtz %[k], 4b \n\t" 83 " addu %[sum], %[sum], %[t2] \n\t" 84 "5: \n\t" 85 "lh %[t0], 0(%[pseq1]) \n\t" 86 "lh %[t1], 0(%[pseq2]) \n\t" 87 "mul %[t0], %[t0], %[t1] \n\t" 88 "srav %[t0], %[t0], %[right_shifts] \n\t" 89 "addu %[sum], %[sum], %[t0] \n\t" 90 "addu %[pseq2_0], %[pseq2_0], %[step_seq2] \n\t" 91 "sw %[sum], 0(%[cc]) \n\t" 92 "bgtz %[dim_cc], 3b \n\t" 93 " addiu %[cc], %[cc], 4 \n\t" 94 "6: \n\t" 95 ".set pop \n\t" 96 : [step_seq2] "+r" (step_seq2), [t0] "=&r" (t0), [t1] "=&r" (t1), 97 [t2] "=&r" (t2), [t3] "=&r" (t3), [pseq1] "=&r" (pseq1), 98 [pseq2] "=&r" (pseq2), [pseq1_0] "+r" (pseq1_0), [pseq2_0] "+r" (pseq2_0), 99 [k] "=&r" (k), [dim_cc] "+r" (dim_cross_correlation), [sum] "=&r" (sum), 100 [cc] "+r" (cross_correlation) 101 : [dim_seq] "r" (dim_seq), [right_shifts] "r" (right_shifts) 102 : "hi", "lo", "memory" 103 ); 104 } 105
