ref: 68ee126e7ad40ef2aa9e1039d81608d31211b7f5
dir: /celt/mips/vq_mipsr1.h/
/* Copyright (c) 2007-2008 CSIRO Copyright (c) 2007-2009 Xiph.Org Foundation Written by Jean-Marc Valin */ /* 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. 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 COPYRIGHT OWNER 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 __VQ_MIPSR1_H__ #define __VQ_MIPSR1_H__ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "mathops.h" #include "arch.h" #define OVERRIDE_vq_exp_rotation1 static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s) { int i; opus_val16 ms; celt_norm *Xptr; Xptr = X; ms = NEG16(s); for (i=0;i<len-stride;i++) { celt_norm x1, x2; x1 = Xptr[0]; x2 = Xptr[stride]; Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15)); *Xptr++ = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15)); } Xptr = &X[len-2*stride-1]; for (i=len-2*stride-1;i>=0;i--) { celt_norm x1, x2; x1 = Xptr[0]; x2 = Xptr[stride]; Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15)); *Xptr-- = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15)); } } #define OVERRIDE_renormalise_vector void renormalise_vector(celt_norm *X, int N, opus_val16 gain, int arch) { int i; #ifdef FIXED_POINT int k; #endif opus_val32 E = EPSILON; opus_val16 g; opus_val32 t; celt_norm *xptr = X; int X0, X1; (void)arch; asm volatile("mult $ac1, $0, $0"); asm volatile("MTLO %0, $ac1" : :"r" (E)); /*if(N %4) printf("error");*/ for (i=0;i<N-2;i+=2) { X0 = (int)*xptr++; asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0)); X1 = (int)*xptr++; asm volatile("MADD $ac1, %0, %1" : : "r" (X1), "r" (X1)); } for (;i<N;i++) { X0 = (int)*xptr++; asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0)); } asm volatile("MFLO %0, $ac1" : "=r" (E)); #ifdef FIXED_POINT k = celt_ilog2(E)>>1; #endif t = VSHR32(E, 2*(k-7)); g = MULT16_16_P15(celt_rsqrt_norm(t),gain); xptr = X; for (i=0;i<N;i++) { *xptr = EXTRACT16(PSHR32(MULT16_16(g, *xptr), k+1)); xptr++; } /*return celt_sqrt(E);*/ } #endif /* __VQ_MIPSR1_H__ */