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/*
* Copyright (c) 2013 The WebRTC 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.
*/
/*
* This file contains implementations of the functions
* WebRtcSpl_ScaleAndAddVectorsWithRound_mips()
*/
#include "common_audio/signal_processing/include/signal_processing_library.h"
int WebRtcSpl_ScaleAndAddVectorsWithRound_mips(const int16_t* in_vector1,
int16_t in_vector1_scale,
const int16_t* in_vector2,
int16_t in_vector2_scale,
int right_shifts,
int16_t* out_vector,
size_t length) {
int16_t r0 = 0, r1 = 0;
int16_t *in1 = (int16_t*)in_vector1;
int16_t *in2 = (int16_t*)in_vector2;
int16_t *out = out_vector;
size_t i = 0;
int value32 = 0;
if (in_vector1 == NULL || in_vector2 == NULL || out_vector == NULL ||
length == 0 || right_shifts < 0) {
return -1;
}
for (i = 0; i < length; i++) {
__asm __volatile (
"lh %[r0], 0(%[in1]) \n\t"
"lh %[r1], 0(%[in2]) \n\t"
"mult %[r0], %[in_vector1_scale] \n\t"
"madd %[r1], %[in_vector2_scale] \n\t"
"extrv_r.w %[value32], $ac0, %[right_shifts] \n\t"
"addiu %[in1], %[in1], 2 \n\t"
"addiu %[in2], %[in2], 2 \n\t"
"sh %[value32], 0(%[out]) \n\t"
"addiu %[out], %[out], 2 \n\t"
: [value32] "=&r" (value32), [out] "+r" (out), [in1] "+r" (in1),
[in2] "+r" (in2), [r0] "=&r" (r0), [r1] "=&r" (r1)
: [in_vector1_scale] "r" (in_vector1_scale),
[in_vector2_scale] "r" (in_vector2_scale),
[right_shifts] "r" (right_shifts)
: "hi", "lo", "memory"
);
}
return 0;
}
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