[lib] add io_net_place data structure

libopenfpga/libpcf/src/base/io_net_place.cpp

@@ -0,0 +1,64 @@
+/******************************************************************************
+ * Memember functions for data structure IoNetPlace
+ ******************************************************************************/
+/* Headers from vtrutil library */
+#include "vtr_log.h"
+#include "vtr_assert.h"
+#include "vtr_time.h"
+
+/* Headers from openfpgautil library */
+#include "openfpga_digest.h"
+
+#include "io_net_place.h"
+
+/* begin namespace openfpga */
+namespace openfpga {
+
+/**************************************************
+ * Public Accessors 
+ *************************************************/
+size_t IoNetPlace::io_x(const std::string& net) const {
+  auto result = io_coords_.find(net);
+  if (result == io_coords_.end()) {
+    return size_t(-1);
+  }
+
+  return result->second[0];
+}
+
+size_t IoNetPlace::io_y(const std::string& net) const {
+  auto result = io_coords_.find(net);
+  if (result == io_coords_.end()) {
+    return size_t(-1);
+  }
+
+  return result->second[1];
+}
+
+size_t IoNetPlace::io_z(const std::string& net) const {
+  auto result = io_coords_.find(net);
+  if (result == io_coords_.end()) {
+    return size_t(-1);
+  }
+
+  return result->second[2];
+}
+
+void IoNetPlace::set_net_coord(const std::string& net,
+                               const size_t& x,
+                               const size_t& y,
+                               const size_t& z) {
+  /* Warn when there is an attempt to overwrite */ 
+  auto result = io_coords_.find(net);
+  if (result != io_coords_.end()) {
+    VTR_LOG_WARN("Overwrite net '%s' coordinate from (%lu, %lu, %lu) to (%lu, %lu, %lu)!\n",
+                 net.c_str(),
+                 result->second[0], result->second[1], result->second[2],
+                 x, y, z);
+  }
+  io_coords_[net][0] = x;
+  io_coords_[net][1] = y;
+  io_coords_[net][2] = z;
+}
+
+} /* end namespace openfpga */

libopenfpga/libpcf/src/base/io_net_place.h

@@ -0,0 +1,49 @@
+#ifndef IO_NET_PLACE_H
+#define IO_NET_PLACE_H
+
+/********************************************************************
+ * Include header files required by the data structure definition
+ *******************************************************************/
+#include <stddef.h>
+#include <vector>
+#include <string>
+#include <map>
+
+/* Begin namespace openfpga */
+namespace openfpga {
+
+/********************************************************************
+ * I/O net place is a data structure to store the coordinate of each nets
+ * defined in users' HDL designs on FPGA fabric.
+ *
+ * For example: 
+ *       netA                          netB
+ *        |                              |
+ *        v                              v
+ *      ioA[0]   ioA[1]      ioB[0]    ioB[1]     ioA[2]
+ *   +-----------------+   +--------+--------+  +--------+
+ *   |        |        |   |        |        |  |        |
+ *   |  I/O   |  I/O   |   |  I/O   |  I/O   |  |  I/O   |
+ *   | [0][y] | [0][y] |   | [1][y] | [1][y] |  | [2][y] | ...
+ *   |  [0]   |  [1]   |   |  [0]   |  [1]   |  |  [0]   |
+ *   +-----------------+   +--------+--------+  +--------+
+ *
+ *******************************************************************/
+class IoNetPlace {
+  public: /* Public aggregators */
+    size_t io_x(const std::string& net) const;
+    size_t io_y(const std::string& net) const;
+    size_t io_z(const std::string& net) const;
+  public: /* Public mutators */
+    void set_net_coord(const std::string& net,
+                      const size_t& x,
+                      const size_t& y,
+                      const size_t& z);
+  private: /* Internal Data */
+    /* I/O coordinate fast lookup by net name */
+    std::map<std::string, std::array<size_t, 3>> io_coords_;
+};
+
+} /* End namespace openfpga*/
+
+#endif

libopenfpga/libpcf/src/base/pcf2place.cpp

@@ -57,7 +57,7 @@ int pcf2place(const PcfData& pcf_data,
     } else {
       /* Cannot find the pin, error out! */
       VTR_LOG_ERROR("Net '%s' from .pcf is neither defined as input nor output in .blif!\n",
-                    net_name.c_str()); 
+                    net.c_str()); 
       num_err++;
       return 1;
     }
@@ -67,8 +67,12 @@ int pcf2place(const PcfData& pcf_data,
     size_t x = io_location_map.io_x(int_pin); 
     size_t y = io_location_map.io_y(int_pin); 
     size_t z = io_location_map.io_z(int_pin); 
+    /* Add a fixed prefix to net namei, this is hard coded by VPR */
+    if (OUTPUT == pin_direction) {
+      net = "out:" + net; 
+    }
     /* Add the information to I/O place data */
-    io_net_place.add_net_coord(net_name, x, y, z, pin_direction);
+    io_net_place.set_net_coord(net, x, y, z);
   }
 
   return num_err;