1 /* Copyright (C) 2003 Jean-Marc Valin */
2 /**
3 @file fixed_c5x.h
4 @brief Fixed-point operations for the TI C5x DSP family
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 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
22 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef FIXED_C5X_H
32 #define FIXED_C5X_H
33
34 #include "dsplib.h"
35
36 #undef IMUL32
IMUL32(long i,long j)37 static inline long IMUL32(long i, long j)
38 {
39 long ac0, ac1;
40 ac0 = _lmpy(i>>16,j);
41 ac1 = ac0 + _lmpy(i,j>>16);
42 return _lmpyu(i,j) + (ac1<<16);
43 }
44
45 #undef MAX16
46 #define MAX16(a,b) _max(a,b)
47
48 #undef MIN16
49 #define MIN16(a,b) _min(a,b)
50
51 #undef MAX32
52 #define MAX32(a,b) _lmax(a,b)
53
54 #undef MIN32
55 #define MIN32(a,b) _lmin(a,b)
56
57 #undef VSHR32
58 #define VSHR32(a, shift) _lshl(a,-(shift))
59
60 #undef MULT16_16_Q15
61 #define MULT16_16_Q15(a,b) (_smpy(a,b))
62
63 #undef MULT16_16SU
64 #define MULT16_16SU(a,b) _lmpysu(a,b)
65
66 #undef MULT_16_16
67 #define MULT_16_16(a,b) _lmpy(a,b)
68
69 /* FIXME: This is technically incorrect and is bound to cause problems. Is there any cleaner solution? */
70 #undef MULT16_32_Q15
71 #define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),(b)),15))
72
73 #define celt_ilog2(x) (30 - _lnorm(x))
74 #define OVERRIDE_CELT_ILOG2
75
76 #define celt_maxabs16(x, len) MAX32(EXTEND32(maxval((DATA *)x, len)),-EXTEND32(minval((DATA *)x, len)))
77 #define OVERRIDE_CELT_MAXABS16
78
79 #endif /* FIXED_C5X_H */
80