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 12 /* 13 * This file contains implementations of the functions 14 * WebRtcSpl_ScaleAndAddVectorsWithRound_mips() 15 */ 16 17 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h" 18 19 int WebRtcSpl_ScaleAndAddVectorsWithRound_mips(const int16_t* in_vector1, 20 int16_t in_vector1_scale, 21 const int16_t* in_vector2, 22 int16_t in_vector2_scale, 23 int right_shifts, 24 int16_t* out_vector, 25 int length) { 26 int16_t r0 = 0, r1 = 0; 27 int16_t *in1 = (int16_t*)in_vector1; 28 int16_t *in2 = (int16_t*)in_vector2; 29 int16_t *out = out_vector; 30 int i = 0, value32 = 0; 31 32 if (in_vector1 == NULL || in_vector2 == NULL || out_vector == NULL || 33 length <= 0 || right_shifts < 0) { 34 return -1; 35 } 36 for (i = 0; i < length; i++) { 37 __asm __volatile ( 38 "lh %[r0], 0(%[in1]) \n\t" 39 "lh %[r1], 0(%[in2]) \n\t" 40 "mult %[r0], %[in_vector1_scale] \n\t" 41 "madd %[r1], %[in_vector2_scale] \n\t" 42 "extrv_r.w %[value32], $ac0, %[right_shifts] \n\t" 43 "addiu %[in1], %[in1], 2 \n\t" 44 "addiu %[in2], %[in2], 2 \n\t" 45 "sh %[value32], 0(%[out]) \n\t" 46 "addiu %[out], %[out], 2 \n\t" 47 : [value32] "=&r" (value32), [out] "+r" (out), [in1] "+r" (in1), 48 [in2] "+r" (in2), [r0] "=&r" (r0), [r1] "=&r" (r1) 49 : [in_vector1_scale] "r" (in_vector1_scale), 50 [in_vector2_scale] "r" (in_vector2_scale), 51 [right_shifts] "r" (right_shifts) 52 : "hi", "lo", "memory" 53 ); 54 } 55 return 0; 56 } 57
