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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.
*/
#include "rtc_base/checks.h"
#include "common_audio/signal_processing/include/signal_processing_library.h"
void WebRtcSpl_FilterARFastQ12(const int16_t* data_in,
int16_t* data_out,
const int16_t* __restrict coefficients,
size_t coefficients_length,
size_t data_length) {
int r0, r1, r2, r3;
int coef0, offset;
int i, j, k;
int coefptr, outptr, tmpout, inptr;
#if !defined(MIPS_DSP_R1_LE)
int max16 = 0x7FFF;
int min16 = 0xFFFF8000;
#endif // #if !defined(MIPS_DSP_R1_LE)
RTC_DCHECK_GT(data_length, 0);
RTC_DCHECK_GT(coefficients_length, 1);
__asm __volatile (
".set push \n\t"
".set noreorder \n\t"
"addiu %[i], %[data_length], 0 \n\t"
"lh %[coef0], 0(%[coefficients]) \n\t"
"addiu %[j], %[coefficients_length], -1 \n\t"
"andi %[k], %[j], 1 \n\t"
"sll %[offset], %[j], 1 \n\t"
"subu %[outptr], %[data_out], %[offset] \n\t"
"addiu %[inptr], %[data_in], 0 \n\t"
"bgtz %[k], 3f \n\t"
" addu %[coefptr], %[coefficients], %[offset] \n\t"
"1: \n\t"
"lh %[r0], 0(%[inptr]) \n\t"
"addiu %[i], %[i], -1 \n\t"
"addiu %[tmpout], %[outptr], 0 \n\t"
"mult %[r0], %[coef0] \n\t"
"2: \n\t"
"lh %[r0], 0(%[tmpout]) \n\t"
"lh %[r1], 0(%[coefptr]) \n\t"
"lh %[r2], 2(%[tmpout]) \n\t"
"lh %[r3], -2(%[coefptr]) \n\t"
"addiu %[tmpout], %[tmpout], 4 \n\t"
"msub %[r0], %[r1] \n\t"
"msub %[r2], %[r3] \n\t"
"addiu %[j], %[j], -2 \n\t"
"bgtz %[j], 2b \n\t"
" addiu %[coefptr], %[coefptr], -4 \n\t"
#if defined(MIPS_DSP_R1_LE)
"extr_r.w %[r0], $ac0, 12 \n\t"
#else // #if defined(MIPS_DSP_R1_LE)
"mflo %[r0] \n\t"
#endif // #if defined(MIPS_DSP_R1_LE)
"addu %[coefptr], %[coefficients], %[offset] \n\t"
"addiu %[inptr], %[inptr], 2 \n\t"
"addiu %[j], %[coefficients_length], -1 \n\t"
#if defined(MIPS_DSP_R1_LE)
"shll_s.w %[r0], %[r0], 16 \n\t"
"sra %[r0], %[r0], 16 \n\t"
#else // #if defined(MIPS_DSP_R1_LE)
"addiu %[r0], %[r0], 2048 \n\t"
"sra %[r0], %[r0], 12 \n\t"
"slt %[r1], %[max16], %[r0] \n\t"
"movn %[r0], %[max16], %[r1] \n\t"
"slt %[r1], %[r0], %[min16] \n\t"
"movn %[r0], %[min16], %[r1] \n\t"
#endif // #if defined(MIPS_DSP_R1_LE)
"sh %[r0], 0(%[tmpout]) \n\t"
"bgtz %[i], 1b \n\t"
" addiu %[outptr], %[outptr], 2 \n\t"
"b 5f \n\t"
" nop \n\t"
"3: \n\t"
"lh %[r0], 0(%[inptr]) \n\t"
"addiu %[i], %[i], -1 \n\t"
"addiu %[tmpout], %[outptr], 0 \n\t"
"mult %[r0], %[coef0] \n\t"
"4: \n\t"
"lh %[r0], 0(%[tmpout]) \n\t"
"lh %[r1], 0(%[coefptr]) \n\t"
"lh %[r2], 2(%[tmpout]) \n\t"
"lh %[r3], -2(%[coefptr]) \n\t"
"addiu %[tmpout], %[tmpout], 4 \n\t"
"msub %[r0], %[r1] \n\t"
"msub %[r2], %[r3] \n\t"
"addiu %[j], %[j], -2 \n\t"
"bgtz %[j], 4b \n\t"
" addiu %[coefptr], %[coefptr], -4 \n\t"
"lh %[r0], 0(%[tmpout]) \n\t"
"lh %[r1], 0(%[coefptr]) \n\t"
"msub %[r0], %[r1] \n\t"
#if defined(MIPS_DSP_R1_LE)
"extr_r.w %[r0], $ac0, 12 \n\t"
#else // #if defined(MIPS_DSP_R1_LE)
"mflo %[r0] \n\t"
#endif // #if defined(MIPS_DSP_R1_LE)
"addu %[coefptr], %[coefficients], %[offset] \n\t"
"addiu %[inptr], %[inptr], 2 \n\t"
"addiu %[j], %[coefficients_length], -1 \n\t"
#if defined(MIPS_DSP_R1_LE)
"shll_s.w %[r0], %[r0], 16 \n\t"
"sra %[r0], %[r0], 16 \n\t"
#else // #if defined(MIPS_DSP_R1_LE)
"addiu %[r0], %[r0], 2048 \n\t"
"sra %[r0], %[r0], 12 \n\t"
"slt %[r1], %[max16], %[r0] \n\t"
"movn %[r0], %[max16], %[r1] \n\t"
"slt %[r1], %[r0], %[min16] \n\t"
"movn %[r0], %[min16], %[r1] \n\t"
#endif // #if defined(MIPS_DSP_R1_LE)
"sh %[r0], 2(%[tmpout]) \n\t"
"bgtz %[i], 3b \n\t"
" addiu %[outptr], %[outptr], 2 \n\t"
"5: \n\t"
".set pop \n\t"
: [i] "=&r" (i), [j] "=&r" (j), [k] "=&r" (k), [r0] "=&r" (r0),
[r1] "=&r" (r1), [r2] "=&r" (r2), [r3] "=&r" (r3),
[coef0] "=&r" (coef0), [offset] "=&r" (offset),
[outptr] "=&r" (outptr), [inptr] "=&r" (inptr),
[coefptr] "=&r" (coefptr), [tmpout] "=&r" (tmpout)
: [coefficients] "r" (coefficients), [data_length] "r" (data_length),
[coefficients_length] "r" (coefficients_length),
#if !defined(MIPS_DSP_R1_LE)
[max16] "r" (max16), [min16] "r" (min16),
#endif
[data_out] "r" (data_out), [data_in] "r" (data_in)
: "hi", "lo", "memory"
);
}
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