122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2009 Xiph.Org Foundation
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Written by Jean-Marc Valin */
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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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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 COPYRIGHT OWNER
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OR 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 __VQ_MIPSR1_H__
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#define __VQ_MIPSR1_H__
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "mathops.h"
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#include "arch.h"
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static void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch);
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#define OVERRIDE_vq_exp_rotation1
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static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s)
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{
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int i;
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opus_val16 ms;
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celt_norm *Xptr;
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Xptr = X;
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ms = NEG16(s);
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for (i=0;i<len-stride;i++)
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{
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celt_norm x1, x2;
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x1 = Xptr[0];
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x2 = Xptr[stride];
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Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15));
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*Xptr++ = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
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}
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Xptr = &X[len-2*stride-1];
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for (i=len-2*stride-1;i>=0;i--)
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{
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celt_norm x1, x2;
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x1 = Xptr[0];
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x2 = Xptr[stride];
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Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15));
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*Xptr-- = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
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}
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}
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#define OVERRIDE_renormalise_vector
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#define renormalise_vector(X, N, gain, arch) \
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(renormalise_vector_mips(X, N, gain, arch))
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void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch)
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{
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int i;
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#ifdef FIXED_POINT
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int k;
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#endif
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opus_val32 E = EPSILON;
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opus_val16 g;
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opus_val32 t;
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celt_norm *xptr = X;
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int X0, X1;
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(void)arch;
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asm volatile("mult $ac1, $0, $0");
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asm volatile("MTLO %0, $ac1" : :"r" (E));
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/*if(N %4)
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printf("error");*/
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for (i=0;i<N-2;i+=2)
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{
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X0 = (int)*xptr++;
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asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0));
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X1 = (int)*xptr++;
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asm volatile("MADD $ac1, %0, %1" : : "r" (X1), "r" (X1));
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}
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for (;i<N;i++)
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{
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X0 = (int)*xptr++;
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asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0));
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}
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asm volatile("MFLO %0, $ac1" : "=r" (E));
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#ifdef FIXED_POINT
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k = celt_ilog2(E)>>1;
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#endif
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t = VSHR32(E, 2*(k-7));
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g = MULT16_16_P15(celt_rsqrt_norm(t),gain);
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xptr = X;
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for (i=0;i<N;i++)
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{
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*xptr = EXTRACT16(PSHR32(MULT16_16(g, *xptr), k+1));
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xptr++;
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}
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/*return celt_sqrt(E);*/
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}
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#endif /* __VQ_MIPSR1_H__ */
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