From 7235d3b5211d0ba8f528d930a4c1e7ad62eec51a Mon Sep 17 00:00:00 2001
From: Gabe Black <gabeblack@google.com>
Date: Thu, 24 May 2018 01:29:36 -0700
Subject: systemc: Add the Accellera implementation for the data type classes.

These files have been cleaned up style wise, and some macros have been
resolved like they were for the header files.

Change-Id: I447e5311961036847e7da0c5a86c0da25a633010
Reviewed-on: https://gem5-review.googlesource.com/10844
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
---
 src/systemc/dt/fx/scfx_utils.cc | 162 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 src/systemc/dt/fx/scfx_utils.cc

(limited to 'src/systemc/dt/fx/scfx_utils.cc')

diff --git a/src/systemc/dt/fx/scfx_utils.cc b/src/systemc/dt/fx/scfx_utils.cc
new file mode 100644
index 000000000..844e15df6
--- /dev/null
+++ b/src/systemc/dt/fx/scfx_utils.cc
@@ -0,0 +1,162 @@
+/*****************************************************************************
+
+  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.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  scfx_utils.cpp -
+
+  Original Author: Martin Janssen, Synopsys, Inc.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+
+// $Log: scfx_utils.cpp,v $
+// Revision 1.1.1.1  2006/12/15 20:20:04  acg
+// SystemC 2.3
+//
+// Revision 1.3  2006/01/13 18:53:58  acg
+// Andy Goodrich: added $Log command so that CVS comments are reproduced in
+// the source.
+//
+
+#include "systemc/ext/dt/fx/scfx_utils.hh"
+
+namespace sc_dt
+{
+
+void
+scfx_tc2csd(scfx_string &s, int w_prefix)
+{
+    if (w_prefix != 0) {
+        SC_ASSERT_(s[0] == '0' && s[1] == 'c' &&
+                   s[2] == 's' && s[3] == 'd', "invalid prefix");
+    }
+
+    scfx_string csd;
+
+    // copy bits from 's' into 'csd'; skip prefix, point, and exponent
+    int i = 0;
+    int j = (w_prefix != 0 ? 4 : 0);
+    while (s[j]) {
+        if (s[j] == '0' || s[j] == '1')
+            csd[i ++] = s[j];
+        else if (s[j] != '.')
+            break;
+        ++j;
+    }
+    csd[i] = '\0';
+
+    // convert 'csd' from two's complement to csd
+    --i;
+    while (i >= 0) {
+        if (csd[i] == '0') {
+            --i;
+        } else {
+            if (i > 0 && csd[i - 1] == '0') {
+                --i;
+            } else if (i == 0) {
+                csd[i--] = '-';
+            } else {
+                csd[i--] = '-';
+                while (i >= 0 && csd[i] == '1')
+                    csd[i--] = '0';
+                if (i > 0)
+                    csd[i] = '1';
+                else if (i == 0)
+                    csd[i--] = '1';
+            }
+        }
+    }
+
+    // copy bits from 'csd' back into 's'
+    i = 0;
+    j = (w_prefix != 0 ? 4 : 0);
+    while (csd[i]) {
+        if (s[j] == '.')
+            ++j;
+        s[j++] = csd[i++];
+    }
+}
+
+
+void
+scfx_csd2tc(scfx_string &csd)
+{
+    SC_ASSERT_(csd[0] == '0' && csd[1] == 'c' &&
+               csd[2] == 's' && csd[3] == 'd', "invalid prefix");
+
+    scfx_string s;
+
+    // copy bits from 'csd' into 's'; skip prefix, point, and exponent
+    int i = 0;
+    s[i++] = '0';
+    int j = 4;
+    while (csd[j]) {
+        if (csd[j] == '-' || csd[j] == '0' || csd[j] == '1')
+            s[i++] = csd[j];
+        else if (csd[j] != '.')
+            break;
+        ++j;
+    }
+    s[i] = '\0';
+
+    // convert 's' from csd to two's complement
+    int len = i;
+    i = 1;
+    while (i < len) {
+        while (i < len && s[i] != '-')
+            i++;
+        if (i < len) {
+            j = i++;
+            s[j--] = '1';
+            while (j >= 0 && s[j] == '0')
+                s[j--] = '1';
+            if (j >= 0)
+                s[j] = '0';
+        }
+    }
+
+    // copy bits from 's' back into 'csd'
+    j = csd.length();
+    csd[j + 1] = '\0';
+    while (j > 4) {
+        csd[j] = csd[j - 1];
+        --j;
+    }
+
+    i = 0;
+    j = 4;
+    while (s[i]) {
+        if (csd[j] == '.')
+            ++j;
+        csd[j++] = s[i++];
+    }
+}
+
+} // namespace sc_dt
-- 
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