util/cpt_upgraders/arm-ccregs.py

# Use condition code registers for the ARM architecture.
# Previously the integer register file was used for these registers.
def upgrader(cpt):
    if cpt.get("root", "isa", fallback="") == "arm":
        for sec in cpt.sections():
            import re

            re_cpu_match = re.match("^(.*sys.*\.cpu[^.]*)\.xc\.(.+)$", sec)
            # Search for all the execution contexts
            if not re_cpu_match:
                continue

            items = []
            for (item, value) in cpt.items(sec):
                items.append(item)
            if "ccRegs" not in items:
                intRegs = cpt.get(sec, "intRegs").split()

                # Move those 5 integer registers to the ccRegs register file
                ccRegs = intRegs[38:43]
                del intRegs[38:43]

                ccRegs.append("0")  # CCREG_ZERO

                cpt.set(sec, "intRegs", " ".join(intRegs))
                cpt.set(sec, "ccRegs", " ".join(ccRegs))


legacy_version = 13