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libs/celt/cc6_fixed_c5x.h

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+/* Copyright (C) 2003 Jean-Marc Valin */
+/**
+   @file fixed_c5x.h
+   @brief Fixed-point operations for the TI C5x DSP family
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+   
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+   
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+   
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+   
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef FIXED_C5X_H
+#define FIXED_C5X_H
+
+#include "dsplib.h"
+
+#undef IMUL32
+static inline long IMUL32(long i, long j)
+{
+   long ac0, ac1;
+   ac0 = _lmpy(i>>16,j);
+   ac1 = ac0 + _lmpy(i,j>>16);
+   return _lmpyu(i,j) + (ac1<<16);
+}
+
+#undef MAX16
+#define MAX16(a,b) _max(a,b)
+
+#undef MIN16
+#define MIN16(a,b) _min(a,b)
+
+#undef MAX32
+#define MAX32(a,b) _lmax(a,b)
+
+#undef MIN32
+#define MIN32(a,b) _lmin(a,b)
+
+#undef VSHR32
+#define VSHR32(a, shift) _lshl(a,-(shift))
+
+#undef MULT16_16_Q15
+#define MULT16_16_Q15(a,b) (_smpy(a,b))
+
+#undef MULT16_16SU 
+#define MULT16_16SU(a,b) _lmpysu(a,b)
+
+#undef MULT_16_16
+#define MULT_16_16(a,b) _lmpy(a,b)
+
+/* FIXME: This is technically incorrect and is bound to cause problems. Is there any cleaner solution? */
+#undef MULT16_32_Q15
+#define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),(b)),15))
+
+
+#define celt_ilog2(x) (30 - _lnorm(x))
+#define OVERRIDE_CELT_ILOG2
+
+#define celt_maxabs16(x, len) MAX16(maxval((DATA *)x, len),-minval((DATA *)x, len))
+#define OVERRIDE_CELT_MAXABS16
+
+#define OVERRIDE_FIND_MAX16
+static inline int find_max16(celt_word16_t *x, int len)
+{
+   DATA max_corr16 = -VERY_LARGE16;
+   DATA pitch16 = 0;
+   maxvec((DATA *)x, len, &max_corr16, &pitch16);
+   return pitch16;
+}
+
+#endif /* FIXED_C5X_H */