diff options
Diffstat (limited to 'lib/rbcodec/codecs/libspeex/filters_arm4.h')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/filters_arm4.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/filters_arm4.h b/lib/rbcodec/codecs/libspeex/filters_arm4.h new file mode 100644 index 0000000000..18c2a7d448 --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/filters_arm4.h | |||
@@ -0,0 +1,96 @@ | |||
1 | /* Copyright (C) 2004 Jean-Marc Valin */ | ||
2 | /** | ||
3 | @file filters_arm4.h | ||
4 | @brief Various analysis/synthesis filters (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_NORMALIZE16 | ||
36 | int normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len) | ||
37 | { | ||
38 | spx_sig_t max_val=1; | ||
39 | int sig_shift; | ||
40 | int dead1, dead2, dead3, dead4, dead5, dead6; | ||
41 | |||
42 | __asm__ __volatile__ ( | ||
43 | "\tmov %1, #1 \n" | ||
44 | "\tmov %3, #0 \n" | ||
45 | |||
46 | ".normalize16loop1%=: \n" | ||
47 | |||
48 | "\tldr %4, [%0], #4 \n" | ||
49 | "\tcmp %4, %1 \n" | ||
50 | "\tmovgt %1, %4 \n" | ||
51 | "\tcmp %4, %3 \n" | ||
52 | "\tmovlt %3, %4 \n" | ||
53 | |||
54 | "\tsubs %2, %2, #1 \n" | ||
55 | "\tbne .normalize16loop1%=\n" | ||
56 | |||
57 | "\trsb %3, %3, #0 \n" | ||
58 | "\tcmp %1, %3 \n" | ||
59 | "\tmovlt %1, %3 \n" | ||
60 | : "=r" (dead1), "=r" (max_val), "=r" (dead3), "=r" (dead4), | ||
61 | "=r" (dead5), "=r" (dead6) | ||
62 | : "0" (x), "2" (len) | ||
63 | : "cc", "memory"); | ||
64 | |||
65 | sig_shift=0; | ||
66 | while (max_val>max_scale) | ||
67 | { | ||
68 | sig_shift++; | ||
69 | max_val >>= 1; | ||
70 | } | ||
71 | |||
72 | __asm__ __volatile__ ( | ||
73 | ".normalize16loop%=: \n" | ||
74 | |||
75 | "\tldr %4, [%0], #4 \n" | ||
76 | "\tldr %5, [%0], #4 \n" | ||
77 | "\tmov %4, %4, asr %3 \n" | ||
78 | "\tstrh %4, [%1], #2 \n" | ||
79 | "\tldr %4, [%0], #4 \n" | ||
80 | "\tmov %5, %5, asr %3 \n" | ||
81 | "\tstrh %5, [%1], #2 \n" | ||
82 | "\tldr %5, [%0], #4 \n" | ||
83 | "\tmov %4, %4, asr %3 \n" | ||
84 | "\tstrh %4, [%1], #2 \n" | ||
85 | "\tsubs %2, %2, #1 \n" | ||
86 | "\tmov %5, %5, asr %3 \n" | ||
87 | "\tstrh %5, [%1], #2 \n" | ||
88 | |||
89 | "\tbge .normalize16loop%=\n" | ||
90 | : "=r" (dead1), "=r" (dead2), "=r" (dead3), "=r" (dead4), | ||
91 | "=r" (dead5), "=r" (dead6) | ||
92 | : "0" (x), "1" (y), "2" (len>>2), "3" (sig_shift) | ||
93 | : "cc", "memory"); | ||
94 | return sig_shift; | ||
95 | } | ||
96 | |||