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kiss_fft_armv5e.h
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 #if defined( __CC_ARM )
43 #define C_MUL(m,a,b) \
44  do { \
45  int mr1; \
46  int mr2; \
47  int mi; \
48  int laval; \
49  int haval; \
50  int bval; \
51  const void *ap = &(a); \
52  const void *bp = &(b); \
53  __asm \
54  { \
55  LDR laval, [ap, 0]; \
56  LDR haval, [ap, 4]; \
57  LDR bval, [bp]; \
58  SMULWB mi, haval, bval; \
59  SMULWB mr1, laval, bval; \
60  SMULWT mr2, haval, bval; \
61  SMLAWT mi, laval, bval, mi; \
62  } \
63  (m).r = SHL32(SUB32(mr1, mr2), 1); \
64  (m).i = SHL32(mi, 1); \
65  (void)(ap); \
66  (void)(bp); \
67  } while(0)
68 #elif defined( __ICCARM__ )
69 #define C_MUL(m,a,b) \
70  do{ \
71  int mr1__; \
72  int mr2__; \
73  int mi__; \
74  long long aval__; \
75  int bval__; \
76  __asm( \
77  "ldrd %[aval], %H[aval], [%[ap]]\n\t" \
78  "ldr %[bval], [%[bp]]\n\t" \
79  "smulwb %[mi], %H[aval], %[bval]\n\t" \
80  "smulwb %[mr1], %[aval], %[bval]\n\t" \
81  "smulwt %[mr2], %H[aval], %[bval]\n\t" \
82  "smlawt %[mi], %[aval], %[bval], %[mi]\n\t" \
83  : [mr1]"=r"(mr1__), [mr2]"=r"(mr2__), [mi]"=r"(mi__), \
84  [aval]"=&r"(aval__), [bval]"=r"(bval__) \
85  : [ap]"r"(&(a)), [bp]"r"(&(b)) \
86  ); \
87  (m).r = SHL32(SUB32(mr1__, mr2__), 1); \
88  (m).i = SHL32(mi__, 1); \
89  (void)mr1__; \
90  (void)mr2__; \
91  (void)mi__; \
92  (void)aval__; \
93  (void)bval__; \
94  } \
95  while(0)
96 #else
97 #define C_MUL(m,a,b) \
98  do{ \
99  int mr1__; \
100  int mr2__; \
101  int mi__; \
102  long long aval__; \
103  int bval__; \
104  __asm__( \
105  "#C_MUL\n\t" \
106  "ldrd %[aval], %H[aval], %[ap]\n\t" \
107  "ldr %[bval], %[bp]\n\t" \
108  "smulwb %[mi], %H[aval], %[bval]\n\t" \
109  "smulwb %[mr1], %[aval], %[bval]\n\t" \
110  "smulwt %[mr2], %H[aval], %[bval]\n\t" \
111  "smlawt %[mi], %[aval], %[bval], %[mi]\n\t" \
112  : [mr1]"=r"(mr1__), [mr2]"=r"(mr2__), [mi]"=r"(mi__), \
113  [aval]"=&r"(aval__), [bval]"=r"(bval__) \
114  : [ap]LDRD_CONS(a), [bp]"m"(b) \
115  ); \
116  (m).r = SHL32(SUB32(mr1__, mr2__), 1); \
117  (m).i = SHL32(mi__, 1); \
118  } \
119  while(0)
120 #endif
121 
122 #undef C_MUL4
123 #if defined( __CC_ARM )
124 #elif defined( __ICCARM__ )
125 #else
126 #define C_MUL4(m,a,b) \
127  do{ \
128  int mr1__; \
129  int mr2__; \
130  int mi__; \
131  long long aval__; \
132  int bval__; \
133  __asm__( \
134  "#C_MUL4\n\t" \
135  "ldrd %[aval], %H[aval], %[ap]\n\t" \
136  "ldr %[bval], %[bp]\n\t" \
137  "smulwb %[mi], %H[aval], %[bval]\n\t" \
138  "smulwb %[mr1], %[aval], %[bval]\n\t" \
139  "smulwt %[mr2], %H[aval], %[bval]\n\t" \
140  "smlawt %[mi], %[aval], %[bval], %[mi]\n\t" \
141  : [mr1]"=r"(mr1__), [mr2]"=r"(mr2__), [mi]"=r"(mi__), \
142  [aval]"=&r"(aval__), [bval]"=r"(bval__) \
143  : [ap]LDRD_CONS(a), [bp]"m"(b) \
144  ); \
145  (m).r = SHR32(SUB32(mr1__, mr2__), 1); \
146  (m).i = SHR32(mi__, 1); \
147  } \
148  while(0)
149 #endif
150 
151 #undef C_MULC
152 #if defined( __CC_ARM )
153 #elif defined( __ICCARM__ )
154 #else
155 #define C_MULC(m,a,b) \
156  do{ \
157  int mr__; \
158  int mi1__; \
159  int mi2__; \
160  long long aval__; \
161  int bval__; \
162  __asm__( \
163  "#C_MULC\n\t" \
164  "ldrd %[aval], %H[aval], %[ap]\n\t" \
165  "ldr %[bval], %[bp]\n\t" \
166  "smulwb %[mr], %[aval], %[bval]\n\t" \
167  "smulwb %[mi1], %H[aval], %[bval]\n\t" \
168  "smulwt %[mi2], %[aval], %[bval]\n\t" \
169  "smlawt %[mr], %H[aval], %[bval], %[mr]\n\t" \
170  : [mr]"=r"(mr__), [mi1]"=r"(mi1__), [mi2]"=r"(mi2__), \
171  [aval]"=&r"(aval__), [bval]"=r"(bval__) \
172  : [ap]LDRD_CONS(a), [bp]"m"(b) \
173  ); \
174  (m).r = SHL32(mr__, 1); \
175  (m).i = SHL32(SUB32(mi1__, mi2__), 1); \
176  } \
177  while(0)
178 #endif
179 
180 #endif /* FIXED_POINT */
181 
182 #endif /* KISS_FFT_GUTS_H */