GNU Radio 3.6.4 C++ API
gr_altivec.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2008 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20  */
21 #ifndef INCLUDED_GR_ALTIVEC_H
22 #define INCLUDED_GR_ALTIVEC_H
23 
24 /*
25  * N.B., always use "vec_float4" et al. instead of "vector float" to
26  * ensure portability across the various powerpc compilers. Some of
27  * them treat "vector" as a context specific keyword, some don't.
28  * Avoid the problem by always using the defines in vec_types.h
29  * (included below)
30  */
31 
32 #include <gr_core_api.h>
33 #include <altivec.h>
34 #undef bool // repair namespace pollution
35 #undef vector // repair namespace pollution
36 
37 #ifdef HAVE_VEC_TYPES_H
38 #include <vec_types.h> // use system version if we've got it
39 #else
40 #include <gr_vec_types.h> // fall back to our local copy
41 #endif
42 #undef qword // repair namespace pollution
43 
44 #include <stddef.h>
45 #include <stdio.h>
46 
47 #ifdef __cplusplus
48 extern "C" {
49 #endif
50 
51 #define VS sizeof(vec_float4)
52 #define FLOATS_PER_VEC (sizeof(vec_float4)/sizeof(float))
53 
54 union v_float_u {
56  float f[FLOATS_PER_VEC];
57 };
58 
60 GR_CORE_API void gr_pvf(FILE *fp, const char *label, vec_float4 v);
61 
62 static inline float
64 {
65  union v_float_u u;
66  vec_float4 t0 = vec_add(v, vec_sld(v, v, 8));
67  vec_float4 t1 = vec_add(t0, vec_sld(t0, t0, 4));
68  u.v = t1;
69  return u.f[0];
70 }
71 
72 #ifdef __cplusplus
73 }
74 #endif
75 
76 #endif /* INCLUDED_GR_ALTIVEC_H */