util: fix cpt upgrader for rvv changes in PR #83 (#115)

Solves issue #106 by updating the cpts with the necessary vector
registers.

util/cpt_upgraders/riscv-vext.py

@@ -0,0 +1,86 @@
+# Copyright (c) 2023 Barcelona Supercomputing Center (BSC)
+# All rights reserved.
+
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+def upgrader(cpt):
+    """
+    Update the checkpoint to support initial RVV implemtation.
+    The updater is taking the following steps.
+
+    1) Set vector registers to occupy 1280 bytes (40regs * 32bytes)
+    2) Clear vector_element, vector_predicate and matrix registers
+    3) Add RVV misc registers in the checkpoint
+    """
+
+    for sec in cpt.sections():
+        import re
+
+        # Search for all XC sections
+        if re.search(".*processor.*\.core.*\.xc.*", sec):
+
+            # Updating RVV vector registers (dummy values)
+            # Assuming VLEN = 256 bits (32 bytes)
+            mr = cpt.get(sec, "regs.vector").split()
+            if len(mr) <= 8:
+                cpt.set(sec, "regs.vector", " ".join("0" for i in range(1280)))
+
+            # Updating RVV vector element (dummy values)
+            cpt.set(sec, "regs.vector_element", "")
+
+            # Updating RVV vector predicate (dummy values)
+            cpt.set(sec, "regs.vector_predicate", "")
+
+            # Updating RVV matrix (dummy values)
+            cpt.set(sec, "regs.matrix", "")
+
+        # Search for all ISA sections
+        if re.search(".*processor.*\.core.*\.isa$", sec):
+
+            # Updating RVV misc registers (dummy values)
+            mr = cpt.get(sec, "miscRegFile").split()
+            if len(mr) == 164:
+                print(
+                    "MISCREG_* RVV registers already seem " "to be inserted."
+                )
+            else:
+                # Add dummy value for MISCREG_VSTART
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VXSAT
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VXRM
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VCSR
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VL
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VTYPE
+                mr.insert(121, 0)
+                # Add dummy value for MISCREG_VLENB
+                mr.insert(121, 0)
+                cpt.set(sec, "miscRegFile", " ".join(str(x) for x in mr))
+
+
+legacy_version = 17