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
exp_rotation1(celt_norm * X,int len,int stride,opus_val16 c,opus_val16 s)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
renormalise_vector_mips(celt_norm * X,int N,opus_val16 gain,int arch)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