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Diffstat (limited to 'lib/rbcodec/codecs/libspeex/lsp_bfin.h')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/lsp_bfin.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/lsp_bfin.h b/lib/rbcodec/codecs/libspeex/lsp_bfin.h new file mode 100644 index 0000000000..20e505287e --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/lsp_bfin.h | |||
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1 | /* Copyright (C) 2006 David Rowe */ | ||
2 | /** | ||
3 | @file lsp_bfin.h | ||
4 | @author David Rowe | ||
5 | @brief LSP routines optimised for the Blackfin | ||
6 | */ | ||
7 | /* | ||
8 | Redistribution and use in source and binary forms, with or without | ||
9 | modification, are permitted provided that the following conditions | ||
10 | are met: | ||
11 | |||
12 | - Redistributions of source code must retain the above copyright | ||
13 | notice, this list of conditions and the following disclaimer. | ||
14 | |||
15 | - Redistributions in binary form must reproduce the above copyright | ||
16 | notice, this list of conditions and the following disclaimer in the | ||
17 | documentation and/or other materials provided with the distribution. | ||
18 | |||
19 | - Neither the name of the Xiph.org Foundation nor the names of its | ||
20 | contributors may be used to endorse or promote products derived from | ||
21 | this software without specific prior written permission. | ||
22 | |||
23 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
24 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
25 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
26 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR | ||
27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
28 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
29 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
30 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
31 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
32 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
33 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
34 | */ | ||
35 | |||
36 | #define OVERRIDE_CHEB_POLY_EVA | ||
37 | #ifdef OVERRIDE_CHEB_POLY_EVA | ||
38 | static inline spx_word32_t cheb_poly_eva( | ||
39 | spx_word16_t *coef, /* P or Q coefs in Q13 format */ | ||
40 | spx_word16_t x, /* cos of freq (-1.0 to 1.0) in Q14 format */ | ||
41 | int m, /* LPC order/2 */ | ||
42 | char *stack | ||
43 | ) | ||
44 | { | ||
45 | spx_word32_t sum; | ||
46 | |||
47 | __asm__ __volatile__ | ||
48 | ( | ||
49 | "P0 = %2;\n\t" /* P0: coef[m], coef[m-1],..., coef[0] */ | ||
50 | "R4 = 8192;\n\t" /* R4: rounding constant */ | ||
51 | "R2 = %1;\n\t" /* R2: x */ | ||
52 | |||
53 | "R5 = -16383;\n\t" | ||
54 | "R2 = MAX(R2,R5);\n\t" | ||
55 | "R5 = 16383;\n\t" | ||
56 | "R2 = MIN(R2,R5);\n\t" | ||
57 | |||
58 | "R3 = W[P0--] (X);\n\t" /* R3: sum */ | ||
59 | "R5 = W[P0--] (X);\n\t" | ||
60 | "R5 = R5.L * R2.L (IS);\n\t" | ||
61 | "R5 = R5 + R4;\n\t" | ||
62 | "R5 >>>= 14;\n\t" | ||
63 | "R3 = R3 + R5;\n\t" | ||
64 | |||
65 | "R0 = R2;\n\t" /* R0: b0 */ | ||
66 | "R1 = 16384;\n\t" /* R1: b1 */ | ||
67 | "LOOP cpe%= LC0 = %3;\n\t" | ||
68 | "LOOP_BEGIN cpe%=;\n\t" | ||
69 | "P1 = R0;\n\t" | ||
70 | "R0 = R2.L * R0.L (IS) || R5 = W[P0--] (X);\n\t" | ||
71 | "R0 >>>= 13;\n\t" | ||
72 | "R0 = R0 - R1;\n\t" | ||
73 | "R1 = P1;\n\t" | ||
74 | "R5 = R5.L * R0.L (IS);\n\t" | ||
75 | "R5 = R5 + R4;\n\t" | ||
76 | "R5 >>>= 14;\n\t" | ||
77 | "R3 = R3 + R5;\n\t" | ||
78 | "LOOP_END cpe%=;\n\t" | ||
79 | "%0 = R3;\n\t" | ||
80 | : "=&d" (sum) | ||
81 | : "a" (x), "a" (&coef[m]), "a" (m-1) | ||
82 | : "R0", "R1", "R3", "R2", "R4", "R5", "P0", "P1" | ||
83 | ); | ||
84 | return sum; | ||
85 | } | ||
86 | #endif | ||
87 | |||
88 | |||
89 | |||