1 /* Copyright (c) 2007-2008 CSIRO 2 Copyright (c) 2007-2009 Xiph.Org Foundation 3 Written by Jean-Marc Valin */ 4 /* 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 9 - Redistributions of source code must retain the above copyright 10 notice, this list of conditions and the following disclaimer. 11 12 - Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in the 14 documentation and/or other materials provided with the distribution. 15 16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 20 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef __VQ_MIPSR1_H__ 30 #define __VQ_MIPSR1_H__ 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include "mathops.h" 37 #include "arch.h" 38 39 static unsigned extract_collapse_mask(int *iy, int N, int B); 40 static void normalise_residual(int * OPUS_RESTRICT iy, celt_norm * OPUS_RESTRICT X, int N, opus_val32 Ryy, opus_val16 gain); 41 static void exp_rotation(celt_norm *X, int len, int dir, int stride, int K, int spread); 42 static void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch); 43 44 #define OVERRIDE_vq_exp_rotation1 45 static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s) 46 { 47 int i; 48 opus_val16 ms; 49 celt_norm *Xptr; 50 Xptr = X; 51 ms = NEG16(s); 52 for (i=0;i<len-stride;i++) 53 { 54 celt_norm x1, x2; 55 x1 = Xptr[0]; 56 x2 = Xptr[stride]; 57 Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15)); 58 *Xptr++ = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15)); 59 } 60 Xptr = &X[len-2*stride-1]; 61 for (i=len-2*stride-1;i>=0;i--) 62 { 63 celt_norm x1, x2; 64 x1 = Xptr[0]; 65 x2 = Xptr[stride]; 66 Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2), s, x1), 15)); 67 *Xptr-- = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15)); 68 } 69 } 70 71 #define OVERRIDE_renormalise_vector 72 73 #define renormalise_vector(X, N, gain, arch) \ 74 (renormalise_vector_mips(X, N, gain, arch)) 75 76 void renormalise_vector_mips(celt_norm *X, int N, opus_val16 gain, int arch) 77 { 78 int i; 79 #ifdef FIXED_POINT 80 int k; 81 #endif 82 opus_val32 E = EPSILON; 83 opus_val16 g; 84 opus_val32 t; 85 celt_norm *xptr = X; 86 int X0, X1; 87 88 (void)arch; 89 90 asm volatile("mult $ac1, $0, $0"); 91 asm volatile("MTLO %0, $ac1" : :"r" (E)); 92 /*if(N %4) 93 printf("error");*/ 94 for (i=0;i<N-2;i+=2) 95 { 96 X0 = (int)*xptr++; 97 asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0)); 98 99 X1 = (int)*xptr++; 100 asm volatile("MADD $ac1, %0, %1" : : "r" (X1), "r" (X1)); 101 } 102 103 for (;i<N;i++) 104 { 105 X0 = (int)*xptr++; 106 asm volatile("MADD $ac1, %0, %1" : : "r" (X0), "r" (X0)); 107 } 108 109 asm volatile("MFLO %0, $ac1" : "=r" (E)); 110 #ifdef FIXED_POINT 111 k = celt_ilog2(E)>>1; 112 #endif 113 t = VSHR32(E, 2*(k-7)); 114 g = MULT16_16_P15(celt_rsqrt_norm(t),gain); 115 116 xptr = X; 117 for (i=0;i<N;i++) 118 { 119 *xptr = EXTRACT16(PSHR32(MULT16_16(g, *xptr), k+1)); 120 xptr++; 121 } 122 /*return celt_sqrt(E);*/ 123 } 124 125 #endif /* __VQ_MIPSR1_H__ */ 126
