From 16fa8d7cc8c92f5ab879e4cf9c6c0bbb3567860f Mon Sep 17 00:00:00 2001
From: Gabe Black <gabeblack@google.com>
Date: Thu, 24 May 2018 01:37:55 -0700
Subject: systemc: Import tests from the Accellera systemc distribution.

Change-Id: Iad76b398949a55d768a34d027a2d8e3739953da6
Reviewed-on: https://gem5-review.googlesource.com/10845
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
---
 .../misc/sim_tests/biquad/biquad3/testbench.cpp    | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/testbench.cpp

(limited to 'src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/testbench.cpp')

diff --git a/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/testbench.cpp b/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/testbench.cpp
new file mode 100644
index 000000000..ca38eb9a4
--- /dev/null
+++ b/src/systemc/tests/systemc/misc/sim_tests/biquad/biquad3/testbench.cpp
@@ -0,0 +1,108 @@
+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  testbench.cpp -- 
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+/* Filename testbench.cc */
+/* This is the implementation file for synchronous process `testbench' */
+
+#include "testbench.h"
+
+float gen_sample(float t);
+
+extern float signal_freq;
+
+void testbench::entry()
+{
+  float sample_val;
+  float result_val;
+  float time;
+
+  FILE *data1 = fopen("Sample", "w");
+  FILE *data2 = fopen("Result", "w");
+
+  reset.write(true);
+  wait();
+  reset.write(false);
+  wait();
+
+  time = 0.0;
+  while (true) {
+    sample_val = gen_sample(time);
+    sample.write(sample_val);
+    wait();
+    result_val = result.read();
+    fprintf(data1, "%f\t%f\n", time, sample_val);
+    fprintf(data2, "%f\t%f\n", time, result_val);
+    char buf[BUFSIZ];
+    sprintf( buf, "Input = %f\tOutput = %f", sample_val, result_val );
+    cout << buf << endl;
+    time += 1.0;
+  }
+} // end of entry function
+
+
+float
+gen_step(float t)
+{
+  if (t < 10.0)
+    return (0.0);
+  else 
+    return (1.0);
+}
+
+float
+gen_impulse(float t)
+{
+  if (t == 20.00)
+    return (1.00);
+  else 
+    return (0.00);
+}
+
+float
+gen_sine(float t, float freq) // freq in Hertz
+{
+  return sin(6.283185 * freq * t * CLOCK_PERIOD * 1e-9);
+}
+
+// This function actually generates the samples
+float
+gen_sample(float t)
+{
+  // return (gen_step(t));
+  // return (gen_impulse(t));
+  return (gen_sine(t, signal_freq));
+}
-- 
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