1 /* Copyright (C) 2004 Jean-Marc Valin */
2 /**
3 @file ltp_arm4.h
4 @brief Long-Term Prediction functions (ARM4 version)
5 */
6 /*
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
9 are met:
10
11 - Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13
14 - Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
17
18 - Neither the name of the Xiph.org Foundation nor the names of its
19 contributors may be used to endorse or promote products derived from
20 this software without specific prior written permission.
21
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #define OVERRIDE_INNER_PROD
inner_prod(const spx_word16_t * x,const spx_word16_t * y,int len)36 static spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
37 {
38 spx_word32_t sum1=0,sum2=0;
39 spx_word16_t *deadx, *deady;
40 int deadlen, dead1, dead2, dead3, dead4, dead5, dead6;
41 __asm__ __volatile__ (
42 "\tldrsh %5, [%0], #2 \n"
43 "\tldrsh %6, [%1], #2 \n"
44 ".inner_prod_loop%=:\n"
45 "\tsub %7, %7, %7\n"
46 "\tsub %10, %10, %10\n"
47
48 "\tldrsh %8, [%0], #2 \n"
49 "\tldrsh %9, [%1], #2 \n"
50 "\tmla %7, %5, %6, %7\n"
51 "\tldrsh %5, [%0], #2 \n"
52 "\tldrsh %6, [%1], #2 \n"
53 "\tmla %10, %8, %9, %10\n"
54 "\tldrsh %8, [%0], #2 \n"
55 "\tldrsh %9, [%1], #2 \n"
56 "\tmla %7, %5, %6, %7\n"
57 "\tldrsh %5, [%0], #2 \n"
58 "\tldrsh %6, [%1], #2 \n"
59 "\tmla %10, %8, %9, %10\n"
60
61 "\tldrsh %8, [%0], #2 \n"
62 "\tldrsh %9, [%1], #2 \n"
63 "\tmla %7, %5, %6, %7\n"
64 "\tldrsh %5, [%0], #2 \n"
65 "\tldrsh %6, [%1], #2 \n"
66 "\tmla %10, %8, %9, %10\n"
67 "\tldrsh %8, [%0], #2 \n"
68 "\tldrsh %9, [%1], #2 \n"
69 "\tmla %7, %5, %6, %7\n"
70 "\tldrsh %5, [%0], #2 \n"
71 "\tldrsh %6, [%1], #2 \n"
72 "\tmla %10, %8, %9, %10\n"
73
74 "\tsubs %4, %4, #1\n"
75 "\tadd %2, %2, %7, asr #5\n"
76 "\tadd %3, %3, %10, asr #5\n"
77 "\tbne .inner_prod_loop%=\n"
78 : "=r" (deadx), "=r" (deady), "=r" (sum1), "=r" (sum2), "=r" (deadlen),
79 "=r" (dead1), "=r" (dead2), "=r" (dead3), "=r" (dead4), "=r" (dead5), "=r" (dead6)
80 : "0" (x), "1" (y), "2" (sum1), "3" (sum2), "4" (len>>3)
81 : "cc"
82 );
83 return (sum1+sum2)>>1;
84 }
85
86 #define OVERRIDE_PITCH_XCORR
pitch_xcorr(const spx_word16_t * _x,const spx_word16_t * _y,spx_word32_t * corr,int len,int nb_pitch,char * stack)87 static void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
88 {
89 int i,j;
90 for (i=0;i<nb_pitch;i+=4)
91 {
92 /* Compute correlation*/
93 //corr[nb_pitch-1-i]=inner_prod(x, _y+i, len);
94 spx_word32_t sum1=0;
95 spx_word32_t sum2=0;
96 spx_word32_t sum3=0;
97 spx_word32_t sum4=0;
98 const spx_word16_t *y = _y+i;
99 const spx_word16_t *x = _x;
100 spx_word32_t y0, y1, y2, y3;
101 y0=*y++;
102 y1=*y++;
103 y2=*y++;
104 y3=*y++;
105 for (j=0;j<len;j+=4)
106 {
107 spx_word32_t part1, part2, part3, part4, x0;
108 spx_word32_t dead1;
109 __asm__ __volatile__ (
110 #ifdef SHORTCUTS
111 "\tldrsh %10, [%8], #4 \n"
112 "\tmul %4, %10, %0 \n"
113 "\tldrsh %15, [%8], #4 \n"
114 "\tmul %5, %10, %1 \n"
115 "\tldrsh %0, [%9], #2 \n"
116 "\tmul %6, %10, %2 \n"
117 "\tldrsh %1, [%9], #2 \n"
118 "\tmul %7, %10, %3 \n"
119
120
121 "\tmla %4, %15, %2, %4 \n"
122 "\tldrsh %2, [%9], #2 \n"
123 "\tmla %5, %15, %3, %5 \n"
124 "\tldrsh %3, [%9], #2 \n"
125 "\tmla %6, %15, %0, %6 \n"
126 "\tmla %7, %15, %1, %7 \n"
127
128 #else
129 "\tldrsh %10, [%8], #2 \n"
130 "\tmul %4, %10, %0 \n"
131 "\tmul %5, %10, %1 \n"
132 "\tmul %6, %10, %2 \n"
133 "\tmul %7, %10, %3 \n"
134
135 "\tldrsh %10, [%8], #2 \n"
136 "\tldrsh %0, [%9], #2 \n"
137 "\tmla %4, %10, %1, %4 \n"
138 "\tmla %5, %10, %2, %5 \n"
139 "\tmla %6, %10, %3, %6 \n"
140 "\tmla %7, %10, %0, %7 \n"
141
142 "\tldrsh %10, [%8], #2 \n"
143 "\tldrsh %1, [%9], #2 \n"
144 "\tmla %4, %10, %2, %4 \n"
145 "\tmla %5, %10, %3, %5 \n"
146 "\tmla %6, %10, %0, %6 \n"
147 "\tmla %7, %10, %1, %7 \n"
148
149 "\tldrsh %10, [%8], #2 \n"
150 "\tldrsh %2, [%9], #2 \n"
151 "\tmla %4, %10, %3, %4 \n"
152 "\tmla %5, %10, %0, %5 \n"
153 "\tmla %6, %10, %1, %6 \n"
154 "\tmla %7, %10, %2, %7 \n"
155
156 "\tldrsh %3, [%9], #2 \n"
157 #endif
158
159 "\tldr %10, %11 \n"
160 "\tldr %15, %12 \n"
161 "\tadd %4, %10, %4, asr #6 \n"
162 "\tstr %4, %11 \n"
163 "\tldr %10, %13 \n"
164 "\tadd %5, %15, %5, asr #6 \n"
165 "\tstr %5, %12 \n"
166 "\tldr %15, %14 \n"
167 "\tadd %6, %10, %6, asr #6 \n"
168 "\tadd %7, %15, %7, asr #6 \n"
169 "\tstr %6, %13 \n"
170 "\tstr %7, %14 \n"
171
172 : "=r" (y0), "=r" (y1), "=r" (y2), "=r" (y3),
173 "=r" (part1), "=r" (part2), "=r" (part3), "=r" (part4),
174 "=r" (x), "=r" (y), "=r" (x0),
175 "=m" (sum1), "=m" (sum2), "=m" (sum3), "=m" (sum4), "=r" (dead1)
176 : "0" (y0), "1" (y1), "2" (y2), "3" (y3),
177 "8" (x), "9" (y),
178 "11" (sum1), "12" (sum2), "13" (sum3), "14" (sum4)
179 : "cc", "memory"
180 );
181 }
182 corr[nb_pitch-1-i]=sum1;
183 corr[nb_pitch-2-i]=sum2;
184 corr[nb_pitch-3-i]=sum3;
185 corr[nb_pitch-4-i]=sum4;
186 }
187
188 }
189