From 42f8854f6d13de7e3f142f3f80233066a032d627 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Thu, 7 Mar 2013 22:35:48 -0500
Subject: blocks: moved fxpt generators to gr-blocks.
Added C++ QA test setup.
---
gr-blocks/lib/qa_fxpt.cc | 104 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 104 insertions(+)
create mode 100644 gr-blocks/lib/qa_fxpt.cc
(limited to 'gr-blocks/lib/qa_fxpt.cc')
diff --git a/gr-blocks/lib/qa_fxpt.cc b/gr-blocks/lib/qa_fxpt.cc
new file mode 100644
index 000000000..9ce26b240
--- /dev/null
+++ b/gr-blocks/lib/qa_fxpt.cc
@@ -0,0 +1,104 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <qa_fxpt.h>
+#include <blocks/fxpt.h>
+#include <cppunit/TestAssert.h>
+#include <iostream>
+#include <stdio.h>
+#include <unistd.h>
+#include <math.h>
+
+static const float SIN_COS_TOLERANCE = 1e-5;
+
+using namespace gr::blocks;
+
+void
+qa_fxpt::t0()
+{
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(M_PI/2, fxpt::fixed_to_float(0x40000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(0.0, fxpt::fixed_to_float(0x00000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(-M_PI, fxpt::fixed_to_float(0x80000000), SIN_COS_TOLERANCE);
+
+ if(0) {
+ /*
+ * These are disabled because of some precision issues.
+ *
+ * Different compilers seem to have different opinions on whether
+ * the calulations are done single or double (or extended)
+ * precision. Any of the answers are fine for our real purpose, but
+ * sometimes the answer is off by a few bits at the bottom.
+ * Hence, the disabled check.
+ */
+ CPPUNIT_ASSERT_EQUAL((int32_t) 0x40000000, fxpt::float_to_fixed(M_PI/2));
+ CPPUNIT_ASSERT_EQUAL((int32_t) 0, fxpt::float_to_fixed(0));
+ CPPUNIT_ASSERT_EQUAL((int32_t) 0x80000000, fxpt::float_to_fixed(-M_PI));
+ }
+}
+
+void
+qa_fxpt::t1()
+{
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0, fxpt::sin (0x00000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0.707106781, fxpt::sin (0x20000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 1, fxpt::sin (0x40000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0.707106781, fxpt::sin (0x60000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0, fxpt::sin (0x7fffffff), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0, fxpt::sin (0x80000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL( 0, fxpt::sin (0x80000001), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(-1, fxpt::sin (-0x40000000), SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(-0.707106781, fxpt::sin (-0x20000000), SIN_COS_TOLERANCE);
+
+ for(float p = -M_PI; p < M_PI; p += 2 * M_PI / 3600) {
+ float expected = sin(p);
+ float actual = fxpt::sin(fxpt::float_to_fixed(p));
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(expected, actual, SIN_COS_TOLERANCE);
+ }
+}
+
+void
+qa_fxpt::t2()
+{
+ for(float p = -M_PI; p < M_PI; p += 2 * M_PI / 3600) {
+ float expected = cos(p);
+ float actual = fxpt::cos(fxpt::float_to_fixed(p));
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(expected, actual, SIN_COS_TOLERANCE);
+ }
+}
+
+void
+qa_fxpt::t3()
+{
+ for(float p = -M_PI; p < M_PI; p += 2 * M_PI / 3600) {
+ float expected_sin = sin(p);
+ float expected_cos = cos(p);
+ float actual_sin;
+ float actual_cos;
+ fxpt::sincos(fxpt::float_to_fixed(p), &actual_sin, &actual_cos);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(expected_sin, actual_sin, SIN_COS_TOLERANCE);
+ CPPUNIT_ASSERT_DOUBLES_EQUAL(expected_cos, actual_cos, SIN_COS_TOLERANCE);
+ }
+}
--
cgit v1.2.3