Houston, we have a trunk.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 57 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/general/gr_fxpt.cc b/gnuradio-core/src/lib/general/gr_fxpt.cc
new file mode 100644
index 000000000..62ed8bd67
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_fxpt.cc
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 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 2, 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_fxpt.h>
+
+const float gr_fxpt::s_sine_table[1 << NBITS][2] = {
+#include "sine_table.h"
+};
+
+// gcc 4.x fix
+const float gr_fxpt::TWO_TO_THE_31;
+const float gr_fxpt::PI;
+
+#if 0
+/*
+ * Compute sine using table lookup with linear interpolation.
+ * Each table entry contains slope and intercept.
+ */
+float
+gr_fxpt::sin (gr_int32 x)
+{
+  gr_uint32 ux = x;
+  int index = ux >> (WORDBITS - NBITS);
+  return s_sine_table[index][0] * (ux >> 1) + s_sine_table[index][1];
+}
+
+float
+gr_fxpt::cos (gr_int32 x)
+{
+  gr_uint32 ux = x + 0x40000000;
+  int index = ux >> (WORDBITS - NBITS);
+  return s_sine_table[index][0] * (ux >> 1) + s_sine_table[index][1];
+}
+#endif