94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
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/* Copyright (C) 2003 Jean-Marc Valin */
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/**
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@file fixed_c5x.h
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@brief Fixed-point operations for the TI C5x DSP family
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FIXED_C5X_H
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#define FIXED_C5X_H
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#include "dsplib.h"
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#undef IMUL32
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static inline long IMUL32(long i, long j)
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{
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long ac0, ac1;
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ac0 = _lmpy(i>>16,j);
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ac1 = ac0 + _lmpy(i,j>>16);
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return _lmpyu(i,j) + (ac1<<16);
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}
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#undef MAX16
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#define MAX16(a,b) _max(a,b)
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#undef MIN16
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#define MIN16(a,b) _min(a,b)
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#undef MAX32
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#define MAX32(a,b) _lmax(a,b)
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#undef MIN32
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#define MIN32(a,b) _lmin(a,b)
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#undef VSHR32
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#define VSHR32(a, shift) _lshl(a,-(shift))
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#undef MULT16_16_Q15
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#define MULT16_16_Q15(a,b) (_smpy(a,b))
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#undef MULT16_16SU
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#define MULT16_16SU(a,b) _lmpysu(a,b)
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#undef MULT_16_16
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#define MULT_16_16(a,b) _lmpy(a,b)
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/* FIXME: This is technically incorrect and is bound to cause problems. Is there any cleaner solution? */
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#undef MULT16_32_Q15
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#define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),(b)),15))
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#define celt_ilog2(x) (30 - _lnorm(x))
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#define OVERRIDE_CELT_ILOG2
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#define celt_maxabs16(x, len) MAX16(maxval((DATA *)x, len),-minval((DATA *)x, len))
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#define OVERRIDE_CELT_MAXABS16
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#define OVERRIDE_FIND_MAX16
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static inline int find_max16(celt_word16 *x, int len)
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{
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DATA max_corr16 = -VERY_LARGE16;
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DATA pitch16 = 0;
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maxvec((DATA *)x, len, &max_corr16, &pitch16);
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return pitch16;
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}
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#endif /* FIXED_C5X_H */
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