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1 /*Copyright (c) 2013, Xiph.Org Foundation and contributors.
2 
3   All rights reserved.
4 
5   Redistribution and use in source and binary forms, with or without
6    modification, are permitted provided that the following conditions are met:
7 
8     * Redistributions of source code must retain the above copyright notice,
9        this list of conditions and the following disclaimer.
10     * Redistributions in binary form must reproduce the above copyright notice,
11        this list of conditions and the following disclaimer in the
12        documentation and/or other materials provided with the distribution.
13 
14   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24   POSSIBILITY OF SUCH DAMAGE.*/
25 
26 #ifndef KISS_FFT_ARMv5E_H
27 #define KISS_FFT_ARMv5E_H
28 
29 #if !defined(KISS_FFT_GUTS_H)
30 #error "This file should only be included from _kiss_fft_guts.h"
31 #endif
32 
33 #ifdef FIXED_POINT
34 
35 #if defined(__thumb__)||defined(__thumb2__)
36 #define LDRD_CONS "Q"
37 #else
38 #define LDRD_CONS "Uq"
39 #endif
40 
41 #undef C_MUL
42 #define C_MUL(m,a,b) \
43     do{ \
44         int mr1__; \
45         int mr2__; \
46         int mi__; \
47         long long aval__; \
48         int bval__; \
49         __asm__( \
50             "#C_MUL\n\t" \
51             "ldrd %[aval], %H[aval], %[ap]\n\t" \
52             "ldr %[bval], %[bp]\n\t" \
53             "smulwb %[mi], %H[aval], %[bval]\n\t" \
54             "smulwb %[mr1], %[aval], %[bval]\n\t" \
55             "smulwt %[mr2], %H[aval], %[bval]\n\t" \
56             "smlawt %[mi], %[aval], %[bval], %[mi]\n\t" \
57             : [mr1]"=r"(mr1__), [mr2]"=r"(mr2__), [mi]"=r"(mi__), \
58               [aval]"=&r"(aval__), [bval]"=r"(bval__) \
59             : [ap]LDRD_CONS(a), [bp]"m"(b) \
60         ); \
61         (m).r = SHL32(SUB32(mr1__, mr2__), 1); \
62         (m).i = SHL32(mi__, 1); \
63     } \
64     while(0)
65 
66 #undef C_MUL4
67 #define C_MUL4(m,a,b) \
68     do{ \
69         int mr1__; \
70         int mr2__; \
71         int mi__; \
72         long long aval__; \
73         int bval__; \
74         __asm__( \
75             "#C_MUL4\n\t" \
76             "ldrd %[aval], %H[aval], %[ap]\n\t" \
77             "ldr %[bval], %[bp]\n\t" \
78             "smulwb %[mi], %H[aval], %[bval]\n\t" \
79             "smulwb %[mr1], %[aval], %[bval]\n\t" \
80             "smulwt %[mr2], %H[aval], %[bval]\n\t" \
81             "smlawt %[mi], %[aval], %[bval], %[mi]\n\t" \
82             : [mr1]"=r"(mr1__), [mr2]"=r"(mr2__), [mi]"=r"(mi__), \
83               [aval]"=&r"(aval__), [bval]"=r"(bval__) \
84             : [ap]LDRD_CONS(a), [bp]"m"(b) \
85         ); \
86         (m).r = SHR32(SUB32(mr1__, mr2__), 1); \
87         (m).i = SHR32(mi__, 1); \
88     } \
89     while(0)
90 
91 #undef C_MULC
92 #define C_MULC(m,a,b) \
93     do{ \
94         int mr__; \
95         int mi1__; \
96         int mi2__; \
97         long long aval__; \
98         int bval__; \
99         __asm__( \
100             "#C_MULC\n\t" \
101             "ldrd %[aval], %H[aval], %[ap]\n\t" \
102             "ldr %[bval], %[bp]\n\t" \
103             "smulwb %[mr], %[aval], %[bval]\n\t" \
104             "smulwb %[mi1], %H[aval], %[bval]\n\t" \
105             "smulwt %[mi2], %[aval], %[bval]\n\t" \
106             "smlawt %[mr], %H[aval], %[bval], %[mr]\n\t" \
107             : [mr]"=r"(mr__), [mi1]"=r"(mi1__), [mi2]"=r"(mi2__), \
108               [aval]"=&r"(aval__), [bval]"=r"(bval__) \
109             : [ap]LDRD_CONS(a), [bp]"m"(b) \
110         ); \
111         (m).r = SHL32(mr__, 1); \
112         (m).i = SHL32(SUB32(mi1__, mi2__), 1); \
113     } \
114     while(0)
115 
116 #endif /* FIXED_POINT */
117 
118 #endif /* KISS_FFT_GUTS_H */
119