Chris@69: /* Copyright (c) 2007-2008 CSIRO
Chris@69:    Copyright (c) 2007-2009 Xiph.Org Foundation
Chris@69:    Written by Jean-Marc Valin */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #ifndef __VQ_MIPSR1_H__
Chris@69: #define __VQ_MIPSR1_H__
Chris@69: 
Chris@69: #ifdef HAVE_CONFIG_H
Chris@69: #include "config.h"
Chris@69: #endif
Chris@69: 
Chris@69: #include "mathops.h"
Chris@69: #include "arch.h"
Chris@69: 
Chris@69: static void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch);
Chris@69: 
Chris@69: #define OVERRIDE_vq_exp_rotation1
Chris@69: static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s)
Chris@69: {
Chris@69:    int i;
Chris@69:    opus_val16 ms;
Chris@69:    celt_norm *Xptr;
Chris@69:    Xptr = X;
Chris@69:    ms = NEG16(s);
Chris@69:    for (i=0;i<len-stride;i++)
Chris@69:    {
Chris@69:       celt_norm x1, x2;
Chris@69:       x1 = Xptr[0];
Chris@69:       x2 = Xptr[stride];
Chris@69:       Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2),  s, x1), 15));
Chris@69:       *Xptr++      = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
Chris@69:    }
Chris@69:    Xptr = &X[len-2*stride-1];
Chris@69:    for (i=len-2*stride-1;i>=0;i--)
Chris@69:    {
Chris@69:       celt_norm x1, x2;
Chris@69:       x1 = Xptr[0];
Chris@69:       x2 = Xptr[stride];
Chris@69:       Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2),  s, x1), 15));
Chris@69:       *Xptr--      = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
Chris@69:    }
Chris@69: }
Chris@69: 
Chris@69: #define OVERRIDE_renormalise_vector
Chris@69: 
Chris@69: #define renormalise_vector(X, N, gain, arch) \
Chris@69:  (renormalise_vector_mips(X, N, gain, arch))
Chris@69: 
Chris@69: void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch)
Chris@69: {
Chris@69:    int i;
Chris@69: #ifdef FIXED_POINT
Chris@69:    int k;
Chris@69: #endif
Chris@69:    opus_val32 E = EPSILON;
Chris@69:    opus_val16 g;
Chris@69:    opus_val32 t;
Chris@69:    celt_norm *xptr = X;
Chris@69:    int X0, X1;
Chris@69: 
Chris@69:    (void)arch;
Chris@69: 
Chris@69:    asm volatile("mult $ac1, $0, $0");
Chris@69:    asm volatile("MTLO %0, $ac1" : :"r" (E));
Chris@69:    /*if(N %4)
Chris@69:        printf("error");*/
Chris@69:    for (i=0;i<N-2;i+=2)
Chris@69:    {
Chris@69:       X0 = (int)*xptr++;
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0));
Chris@69: 
Chris@69:       X1 = (int)*xptr++;
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" (X1), "r" (X1));
Chris@69:    }
Chris@69: 
Chris@69:    for (;i<N;i++)
Chris@69:    {
Chris@69:       X0 = (int)*xptr++;
Chris@69:       asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0));
Chris@69:    }
Chris@69: 
Chris@69:    asm volatile("MFLO %0, $ac1" : "=r" (E));
Chris@69: #ifdef FIXED_POINT
Chris@69:    k = celt_ilog2(E)>>1;
Chris@69: #endif
Chris@69:    t = VSHR32(E, 2*(k-7));
Chris@69:    g = MULT16_16_P15(celt_rsqrt_norm(t),gain);
Chris@69: 
Chris@69:    xptr = X;
Chris@69:    for (i=0;i<N;i++)
Chris@69:    {
Chris@69:       *xptr = EXTRACT16(PSHR32(MULT16_16(g, *xptr), k+1));
Chris@69:       xptr++;
Chris@69:    }
Chris@69:    /*return celt_sqrt(E);*/
Chris@69: }
Chris@69: 
Chris@69: #endif /* __VQ_MIPSR1_H__ */