3 * Copyright 2002 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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)
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.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
24 * FIXME. This code is virtually identical to qa_gr_fir_?CC.cc
25 * Kludge up some kind of macro to handle the minor differences.
34 typedef gr_complex i_type;
35 typedef gr_complex o_type;
36 typedef float tap_type;
37 typedef gr_complex acc_type;
40 #include <qa_gr_fir_ccf.h>
41 #include <gr_fir_ccf.h>
42 #include <gr_fir_util.h>
47 #include <cppunit/TestAssert.h>
53 #define ERR_DELTA (1e-5)
55 #define NELEM(x) (sizeof (x) / sizeof (x[0]))
58 // typedef for something logically "pointer to constructor".
59 // there may be a better way, please let me know...
61 typedef gr_fir_ccf* (*fir_maker_t)(const std::vector<tap_type> &taps);
66 return 2.0 * ((float) random () / RANDOM_MAX - 0.5); // uniformly (-1, 1)
70 random_floats (float *buf, unsigned n)
72 for (unsigned i = 0; i < n; i++)
73 buf[i] = (float) rint (uniform () * 32767);
77 random_complex (gr_complex *buf, unsigned n)
79 for (unsigned i = 0; i < n; i++){
80 float re = rint (uniform () * 32767);
81 float im = rint (uniform () * 32767);
82 buf[i] = gr_complex (re, im);
87 ref_dotprod (const i_type input[], const tap_type taps[], int ntaps)
90 for (int i = 0; i < ntaps; i++)
91 sum += input[i] * taps[ntaps - i - 1];
97 // Test for ntaps in [0,9], and input lengths in [0,17].
98 // This ensures that we are building the shifted taps correctly,
99 // and exercises all corner cases on input alignment and length.
103 test_random_io (fir_maker_t maker)
105 const int MAX_TAPS = 9;
106 const int OUTPUT_LEN = 17;
107 const int INPUT_LEN = MAX_TAPS + OUTPUT_LEN;
109 // Our SIMD ccc kernel requires that the complex input be 64-bit (8-byte) aligned.
110 //i_type input[INPUT_LEN];
111 i_type *input = (i_type *)malloc16Align(INPUT_LEN * sizeof(i_type));
112 o_type expected_output[OUTPUT_LEN];
113 o_type actual_output[OUTPUT_LEN];
114 tap_type taps[MAX_TAPS];
117 srandom (0); // we want reproducibility
119 for (int n = 0; n <= MAX_TAPS; n++){
120 for (int ol = 0; ol <= OUTPUT_LEN; ol++){
122 // cerr << "@@@ n:ol " << n << ":" << ol << endl;
124 // build random test case
125 random_complex (input, INPUT_LEN);
126 random_floats (taps, MAX_TAPS);
128 // compute expected output values
129 for (int o = 0; o < ol; o++){
130 expected_output[o] = ref_dotprod (&input[o], taps, n);
135 vector<tap_type> f1_taps (&taps[0], &taps[n]);
136 gr_fir_ccf *f1 = maker (f1_taps);
138 // zero the output, then do the filtering
139 memset (actual_output, 0, sizeof (actual_output));
140 f1->filterN (actual_output, input, ol);
144 // we use a sloppy error margin because on the x86 architecture,
145 // our reference implementation is using 80 bit floating point
146 // arithmetic, while the SSE version is using 32 bit float point
149 for (int o = 0; o < ol; o++){
150 ASSERT_COMPLEXES_EQUAL (expected_output[o], actual_output[o],
151 abs (expected_output[o]) * ERR_DELTA);
162 for_each (void (*f)(fir_maker_t))
164 std::vector<gr_fir_ccf_info> info;
165 gr_fir_util::get_gr_fir_ccf_info (&info); // get all known ccf implementations
167 for (std::vector<gr_fir_ccf_info>::iterator p = info.begin ();
171 std::cerr << " [" << p->name << "]";
175 std::cerr << std::endl;
182 for_each (test_random_io);